Nvenc Presets Ffmpeg

wmv -c:v hevc_nvenc -bf 4 -preset slow -c:a. 没有配置——disable-nvenc的ffmpeg. Variable bit rate is usually achieved by. 2 kbps, SSIM All 0. ffmpeg -i myfile. )에서는 아래와 같이 인코딩 오류를 발생시킵니다. I analyzed the files and MP4 software doesn't use CABAC, this costs quality and FFMPEG software is very conservative with main or even baseline profiles, FFMPEG nvenc isn't utilising high-profile or the slow preset. Results Interpretation of results. This document describes how to use LCEVC in this specific build. Commandline: CPU encoding: ffmpeg -i in_x264. mkv ffmpeg-audiodelay=skip handbrake-UsingHardwareEncoding=true. hevc_nvenc. (from -2 to INT_MAX) (default any). Does not work. nvencc x64\NVEncC64. I'm using my FFMPEG with the suport of my GPU (NVENC) to convert files from my satelite receiver (SD, mpeg2. NVEncC 10417. 264编码 v high -level 4. mp4 你可以通过ffmpeg -h encoder=h264_nvenc或ffmpeg -h encoder=hevc_nvenc看到可用的预设值、其他选项和编码器信息。 注意:如果你发现没有NVENC功能的设备的. i'm trying to encode movies on my nvdia-gpu with ffmpeg and h264_nvenc, but no matter what options i set, the output-file is always the same. Installation and initial setup We assume you've already set up Nimble Streamer, it's been set up to get an incoming live stream and you've tested basic streaming. Of course, you'll need to adjust for target bit rates and a fixed cq value. Install ffmpeg and dependencies: sudo dpkg -i. Jul 30th, 2018. ffmpeg -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input. "Fossies" - the Fresh Open Source Software Archive Source code changes of the file "ffmpeg/libavcodec/nvenc. Oct 2, 2017. Here is the FFmpeg command line that works: ffmpeg -vsync 0 -i Test. 04: apt-get install nvidia-460 --no-install-recommends Make sure the non-free component is enabled in sources. ffmpeg -i Ukidig-HD. encodeCodecConfig. latest Hybrid version , latest nvidia drivers , win10 x64 , nvenc , crashed on every mp4 file after audio encoding settings NVEnc --y4m -i - --fps 29. default="Default" NVENC. mp4 \ -ss 00:01:24 -t 00:00:01 \ output_%3d. Either will work but there are caveats, or you could install both and not worry. The FFMpegArgs NVENC_Presets type exposes the following members. /snap/bin/ffmpeg -y -vsync 0 -hwaccel_output_format cuda -i pipe:0 -preset fast -c:a:1 copy -c:v h264_nvenc -c:s copy -maxrate 3M -f mpegts pipe:1 -nostdin -hide_banner -loglevel info still need to sort the following: it takes very long to start the whole thing. 264, HEVC (H. c" betweenMPlayer-1. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. A number of template examples are included. mkv (I have tried some variations as well, such as "preset lossless" with no change) To compare to original, I am simply running: ffmpeg -i movie. 更多示例可以参考 [2]中"How to use FFmpeg/libav with NVIDIA GPU-acceleration"部分。. First ffmpeg searches for a file named codec_name-arg. MainConcept FFmpeg Plugins make improving video quality and performance fast and easy for any level of user. The help command ffmpeg -h encoder=hevc_nvenc does not mention anything about this. Đây là dòng tôi đang sử dụng. 1 -b:v 28000k -minrate 28000k -maxrate 28000k -bufsize 35835k -pix_fmt yuv420p -r 25000/1000 -s 3840x2160 testuhdhevc25p422. 264 compared to x264 slow preset, which is a good quality h. With ffmpeg nvenc, NVENC unit up use to 15 to 18% (depend game) in 64bit Mint. To that end, I will present my own take on the current “war” between software and hardware encoders, then go into quick details of how to best use AMD GPUs for encoding for video archival with. Is there an easy way for me to select say the ffmpeg 'high performance' ffmpeg preset from the VMIG streaming dialog?. mp4 \ -ss 00:01:24 -t 00:00:01 \ output_%3d. For hevc_nvenc, which quickly creates a good looking file, but appears to not truly be lossless: ffmpeg -i frame%04d. With re-streaming in Wowza Streaming Engine™ media server software, you can broadcast an encoded video file as though it were a live stream. Results Interpretation of results. Making an MP4 file for web streaming. 인텔의 qsv는 nvenc에 비해 훨씬 간결하며, x264/x265와 유사하게 옵션을 적용할 수 있다. For example for a target size of 1 GB (one giga byte, which is 8 giga bits) and 10 000 seconds of video (2 h 46 min 40 s), use a bitrate of 800 000 bit/s (800 kbit/s): ffmpeg -i input. This guide maps most of x264's options to FFmpeg's options along with detailed descriptions by x264 developer Dark_Shikari. ; Select Extract Here and wait for the files to extract. h264_nvenc. I made a quick video to show my settings but also, it looked like it was better quality then normal. You can now select both NVENC for H. July 4, 2018. To compare legacy and new presets, we conducted four transcoding experiments. function grab-screen-lossless { ffmpeg -an -f x11grab -video_size 1920x1080 -framerate 60 -i :0. Decode, encode, transcode, mux, demux, stream, filter and play anything. 1) we have new presets for "hevc_nvenc" and i think some old ones got renamed. Tôi đang sử dụng FFMPEG của mình với hỗ trợ GPU ( NVENC ) để chuyển đổi tệp từ máy thu satelite (SD, mpeg2. 1 FFMPEG: 2. mkv nVidia HW encoding: ffmpeg -i in_x264. Supported hardware devices: cuda cuda d3d11va d3d11va. Initializes a new instance of the FFMpegArgs NVENC_Presets class. ts" -vcodec h264_nvenc -preset slow -level 4. To put it simply, FFmpeg is awesome, and every user should have FFmpeg installed in Windows. * NVIDIA 그래픽 가속을 이용한 H. Official Nvidia driver downloads can be found on the Nvidia website. Here is the line i'm using. mkv I tried with different settings for the nVidia method to increase the quality, but no luck. 264 hardware encoding ) uses presets: slow, medium, fast, high performance, high quality, bd, low latency, low latency high quality. ffmpeg -hide_banner -s 3840x2160 -r 60 -pix_fmt nv12 -i E:\yuv. Does not work. Đây là dòng tôi đang sử dụng. 09) installed for my GTX 1070. 264, HEVC (H. 01-1 $ lsmod | grep nvidia nvidia_drm 69632 10 drm_kms_helper 274432 2 nvidia_drm,i915 nvidia_uvm 1175552 0 nvidia_modeset 1200128 6 nvidia_drm nvidia. 01-3 nvidia-lts 1:470. Here's an example command using a 1280x720 h. Jul 19, 2016 · ffmpeg -i input. Cuberlain commented on Dec 4, 2020 •. , 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 5 kbps, SSIM All 0. Opsi ini hanya berfungsi saat -rc diatur ke constqp. System Object. png' lossless h264: ffmpeg -i frame%04d. low latency high performance, lossless, & lossless high performance. 我将 FFMPEG 与我的GPU( NVENC )支持 在一起使用 ,将来自卫星接收器的文件(SD,mpeg2. for example: ffmpeg -hwaccel cuvid -hwaccel_device 0 -fflags +discardcorrupt -c:v h264_cuvid -gpu 0 -probesize 10M -analyzeduration 10M -thread_queue_size. So the patch is just to add < PRESET_P1 and maybe the same about ctx->tuning_info in #ifdef NVENC_HAVE_NEW_PARAMETERS. 265) encoders. Full Hardware Transcoding Example. 1) we have new presets for "hevc_nvenc" and i think some old ones got renamed. exe -h encoder=hevc_nvenc pause execute it Quote. It was super. Yet, that is old NVENC. in a streaming scenario). legacy and new presets in 1080p and 2160p resolution with H. On the RTX cards, similar to the RTX 2080 Ti, Nvidia has improved its encoder. The following command will record a video webcam. The following section compares. Tagged with nvidia, ubuntu. so this can let you use any version driver also without limits. 1 -qmin 10 -qmax. ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input. TS文件)转换为h264. dev and it fails on all archived versions I was able to find. wmv -c:v hevc_nvenc -bf 4 -preset slow -c:a aac -b:a 256k myvideo. legacy and new presets in 1080p and 2160p resolution with H. Input stream was read as 30fps by using ffmpeg -r 30 -i rtmp://[addr]. 264 so you do expect it should do better when compared that way. ffmpeg -i input-file. mp4 -c:a copy -c:v h264_nvenc -preset llhq -profile high -b:v 5M -bufsize 167K-maxrate 5M -g 999999 -bf 0 output. You can now select both NVENC for H. The explicit tune setting is actually required - it is the way to figure out if FFmpeg uses old or new values - even new FFmpeg may not support the new API if it was built with old NVENC headers. 更多示例可以参考 [2]中"How to use FFmpeg/libav with NVIDIA GPU-acceleration"部分。. Code: Select all $. 1 and their equivalents in SDK v10. yuv -c:v h264_nvenc -preset p7 -tune hq -g 120 -b:v 20000k -maxrate 20000k -bufsize 40000k -rc cbr -rc-lookahead 32 -multipass 2 -no-scenecut 0 -b_adapt 1 -spatial-aq 1 -temporal-aq 1 -nonref_p 1 -aq-strength 7 -b_ref_mode middle -bf 4 -f null -. exe -h encoder=hevc_nvenc pause execute it Quote. This change introduces support for the profile, and exposes the appropriate. Apr 29, 2020. Thanks to its multi-file encoding feature, it may be the fastest a/v batch encoder available, since it maximizes system. This problem might not exist on other cards. System Object. Here are the filesize and the ssim based quality for the options above when encoding the same input file. 265 codecs using the popular open source library FFmpeg. /ffmpeg -encoders 2>/dev/null | grep nvenc V h264_nvenc NVIDIA NVENC H. To facilitate the evaluation and utilisation of LCEVC as a codec, V-Nova LCEVC libraries are supported by a build of FFmpeg. Feb 24, 2017 — The default is 23, so you can use this as a starting point. exe --preset P4 --vbr 0 --vbr-quality 25-i sample_movie_1080p. avi" -map 0:0 -an -sn -vf framerate=fps=60:scene=7,zscale=rangein=tv:range=tv -pix_fmt yuv420p -vsync 0 -vcodec hevc_nvenc -preset 5 -profile:v 1 -level 0 -tier main -rc vbr_hq -2pass 1 -qmin 0 -qmax 51 -b:v 1500k -spatial-aq 0 -temporal_aq 0 -surfaces 32 -no-scenecut 0 -refs 3. What's more, it is currently possibly. Don't get me wrong, this are great settings for older or slower computers. Threading capabilities: none. The command line instructions can be very hard to masterunderstand, so myFFmpeg does all the hard work for you. What's new in NVEnc 5. Assuming Windows is used here, but this should also work for Linux and Mac. FFQueue is available in 32bit and some of its primary features are: Process multiple encoding jobs. To encode a live source I use: ffmpeg -stats -f decklink -i “DeckLink Mini Recorder [email protected]” -r 25000/1000 -c:v nvenc_hevc -preset hq -profile:v high -level 5. Full Hardware Transcoding Example. How to reproduce: % ffmpeg -i in/Foreman_ProRes. x Windows build that also has NVENC libraries which are absent from the NewTek released version. The encoder is supported in many livestreaming and recording programs, such as Wirecast, Open Broadcaster Software (OBS) and. February 14, 2015 at 12:21 pm. 0 -preset llhq outputfile. When using h264_nvenc or hevc_nvenc a slowdown of 50fps to 100fps was all presets are SDK10 presets now. 264 编码器 -preset:指定输出的视频质量,会影响文件的生成速度,有以下几个可用的值 ultrafast,. Post by Marco Diletti. The review for FFmpeg has not been completed yet, but it was tested by an editor here on a PC. deb packages: dpkg-buildpackage -rfakeroot -b -uc -us. FFmpeg resize using CUDA scale (filter scale_cuda is GPU accelerated video resizer ), full hardware transcoding example: $ ffmpeg -hwaccel cuvid -c:v h264_cuvid -i INPUT -vf scale_cuda=-1:720 -vcodec h264_nvenc -acodec copy OUTPUT. Example command using a single-frame VBV: ffmpeg -i -r 25 -c:v libx264 -x264opts nal-hrd=cbr:force-cfr=1 -b:v 2500k -minrate 2500k -maxrate 2500k -bufsize 100k output. To work with a lot of transcoder processes (more than. See the GNU #ifdef NVENC_HAVE_NEW_PRESETS {"p1", "fastest (lowest quality)", 0, AV_OPT_TYPE_CONST, {. 09) installed for my GTX 1070. And in the new RTX 20 and 30-series, NVENC performs better than x264 Fast and on par with x264 Medium, a preset that requires an expensive dual PC setup. 1 -qmin 10 -qmax. yuv -c:v h264_nvenc -preset p7 -tune hq -g 120 -b:v 20000k -maxrate 20000k -bufsize 40000k -rc cbr -rc-lookahead 32 -multipass 2 -no-scenecut 0 -b_adapt 1 -spatial-aq 1 -temporal-aq 1 -nonref_p 1 -aq-strength 7 -b_ref_mode middle -bf 4 -f null -. System Object. Note: Ensure that you select the appropriate video resolution (see the -s option passed to ffmpeg), otherwise the capture will fail. With ffmpeg and a decent GPU (like a Quadro P4000) the h265/HEVC encoder finaly gets a good speedboost with up to 90fps when encoding HD movies with the below parameter values and 200fps when using the GPU accelerated h264 encoder. NVENC SDK: 5. With ffmpeg nvenc, NVENC unit up use to 15 to 18% (depend game) in 64bit Mint. aac -i input. Anyway, across the board, regardless of encoding settings, we drop frames. Part 1: I have been captured video from screen: ffmpeg -f x11grab -r 30 -s 1600x900 -i :0. Some of those presets give you even better quality than slow like the new "p7" preset (but of course they're slower). 264 encoder]: General capabilities: dr1 delay hardware. Code: Select all $. 08 Fix NVEnc 5. hq="High Quality" NVENC. What hevc nvenc settings do work with lossless preset in ffmpeg? + Reply to Thread. New Release 17. In the past, NVENC never looked as sharp or smooth as X. The explicit tune setting is actually required - it is the way to figure out if FFmpeg uses old or new values - even new FFmpeg may not support the new API if it was built with old NVENC headers. mp4-hwaccel cuvid可以将解码的帧保存在显存里,如果不带这个参数解码出来的帧会进入内存-vsync 0能避免避免重复帧-c:v h264_cuvid启用硬件解码器 -c:v h264_nvenc启用硬件编码器. sliceModeData = ctx->encode_config. /* If lookahead isn't set from CLI, use value from preset. For example for a target size of 1 GB (one giga byte, which is 8 giga bits) and 10 000 seconds of video (2 h 46 min 40 s), use a bitrate of 800 000 bit/s (800 kbit/s): ffmpeg -i input. 265/HVEC (via FFmpeg) but we also tried a number of tests on h. NVEDC进行h264解码. 264/AVC (via FFmpeg). To compare legacy and new presets, we conducted four transcoding experiments. The following section compares. Threading capabilities: none. Oct 2, 2017. In this part 1 of FFmpeg encoding comparisons I look at x264 presets, their speed and output file size. /*deb Kdenlive settings (optimized for publishing to Youtube) f=mp4 vcodec=nvenc_h264 acodec=aac ab=384k g=15 profile:v=high global_quality=21 -coder 1 vq=21 -r 29. Note: Ensure that you select the appropriate video resolution (see the -s option passed to ffmpeg), otherwise the capture will fail. srt -map 0 -map 1 -c copy -c:v libx264 -crf 23 -preset veryfast video-output. I'm using my FFMPEG with the suport of my GPU (NVENC) to convert files from my satelite receiver (SD, mpeg2. Setting -crf or -qp to 0 forces x264 in lossless mode the -preset settings then impact just the speed/size ratio. 2 the problem persists. FFMPEG with NVIDIA Acceleration on Ubuntu Linux DU-07857-001_v01 | 3 INSTALL THE DISPLAY DRIVER 1. И вся мощь моей системы не используется: Только 11% GPU и 30% CPU. It support many video and audio formats and can use hardware acceleration, with for example NVIDIA GPUs. FFMpegArgs NVENC_Presets GetList Method : SnapStream 21. ffmpeg reports no errors, but simply exits like after 11 frames or so. ffmpeg -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i input. 19 is the recommended setting as its' visually identical to 0, yet preserves good compression trade off. ffmpeg video processing on an old linux/machine, like a i7 860, running Fedora26 can be painful if you only rely on the CPU. Does not work. How to reproduce: Run a transcode on versions built before and after the stated commit, example below is what I specifically used. Installing the driver. 使用NVENC进行FFMpeg的最佳设置. mp4 \ output. 04LTS Install the basic graphics packages # apt-get install ffmpeg gxine libdvdread4 icedax tagtool libdvd-pkg easytag id3tool lame libxine2-ffmpeg nautilus-script-audio-convert libmad0 mpg321 libavcodec-extra gstreamer1. Theorically it shoulds use 2 pass encode, and it encodes with half. Added 1080p 59. Code: ffmpeg with QucikSync and NVENC as well as most other major codecs for Ubuntu 16. QUERY ENCODER PRESETS 2 3 1 NVENC SW SDK. FFmpeg with NVIDIA GPU. After going back to a stable version of tvheadend 4. I picked Rocket League because it suffers from a lot of compression due to its intense pace. Feb 24, 2017 — The default is 23, so you can use this as a starting point. ffmpeg -i "e:\input. Here is the FFmpeg command line that works: ffmpeg -vsync 0 -i Test. 在保存的txt中所有nvenc的相关信息. (Inherited from Object. Click to expand I was able to stream with the HQ Low Latency 2Pass on a 650ti Boost 2gb OC edition. 3rd Mar 2020 14:28 #3. 0 -c:v h264_nvenc -preset llhq -tune zerolatency -qp 10 "${1}" } function vid_compress. Both Options can achieve similar quality to x264 medium, but the latter is able to exceed that and rival x264 medium/slow in various situations. PRESET Encoder Settings APPLICATION HIGH QUALITY B Frames, CABAC, 8x8 Transform, All Intra Modes, All Inter Modes*, VBR RC, GopLength 30 TRANSCODING HIGH BITRATE HIGH PERFORMANCE No B Frames, CAVLC, P16x16, Intra16x16 and Intra4x4 Modes, VBR,. mp4 -i subtitles. mov -c:v libx264 -s 1280x720 -preset medium -g 72. Click to expand I was able to stream with the HQ Low Latency 2Pass on a 650ti Boost 2gb OC edition. I suspect that ffmpeg is the source of this problem, because at each compilation a new version is. After going back to a stable version of tvheadend 4. 265 NVENC 2160P 4K; H. Setting up NVENC (for Streaming) Modern OBS Studio has two ways to achieve the expected quality: the built-in NVENC H. Mar 05, 2019 · ffmpeg -hwaccel cuvid -i myvideo. New Release 17. ts" -vcodec h264_nvenc -preset slow -level 4. The help command ffmpeg -h encoder=hevc_nvenc does not mention anything about this. NVEDC进行h264解码. View the options with: "ffmpeg -h encoder=hevc_nvenc" I have done some light playing with it with settings like "-qp 20 -preset slow -tune hq -profile main10" though it may be better to do "-rc vbr_hq" and specify a bitrate instead. I'm at a loss since it works fine if no preset is set. ffmpeg x64\ffmpeg -i sample_movie_1080p. avs -c:v h264_nvenc -preset slow -rc constqp -global_quality 22 -temporal-aq 1 -rc-lookahead 32 -g 600 -an output_nvenc2. mp4" Но качество не так хорошо, как ожидалось. Here is the line i'm using. Commandline: CPU encoding: ffmpeg -i in_x264. ffmpeg -hwaccel cuvid -c:v h264_cuvid -i 3030025890-TEST. Single-pass MP4 encoding example. ffmpeg x64\ffmpeg -i sample_movie_1080p. constant bitrate: ffmpeg -i input. /*deb Kdenlive settings (optimized for publishing to Youtube) f=mp4 vcodec=nvenc_h264 acodec=aac ab=384k g=15 profile:v=high global_quality=21 -coder 1 vq=21 -r 29. Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 rgb0 gbrp gbrp16le cuda d3d11. latest Hybrid version , latest nvidia drivers , win10 x64 , nvenc , crashed on every mp4 file after audio encoding settings NVEnc --y4m -i - --fps 29. When I say "install," I'm talking about adding FFmpeg to the Windows path so that it is easier to access via the Command Prompt or other command-line applications like PowerShell. -preset faster 是做了如下设置 --no-mixed-refs --rc-lookahead 20 --ref 2 --. 2 -preset slow -qp 30 -acodec libfaac output. This is done using specific FFmpeg libraries which we use in addition to our own code. bmp -r 30 -c:v hevc_nvenc -preset 10 -an movie. The relatively simple task of installing opens access to Intel Media Server Studio codecs in FFmpeg, providing a new set of performance/quality options to build solutions for today and tomorrow. 020 2021-01-20: added link to BuyMeACoffee. mkv Summary. Added option "Output format" (ffmpeg -f) to preset on Misc. It is usually a given (on most occasions) that the slowest preset which is "veryslow" takes the. Here's some system info: OS: Windows 7 Product: NVidia GeForce GTX 750 Ti Driver Version: 358. I suspect that ffmpeg is the source of this problem, because at each compilation a new version is. FFmpeg with NVIDIA GPU. exe -h full>F:\app\AviUtlPack\3rdparty\ffmpeg. dev and it fails on all archived versions I was able to find. NVENC Preset Migration Guide This guide helps developers in knowing settings used in SDK v9. July 4, 2018. [Video] codec = h264_nvenc, h264 max-bitrate = 0 bitrate-ratio = crf = -1 crf-profiles = preset = codec-parameters = dynamic-parameters = False max-width = 1280 profile = max-level = 0. The FFMpegArgs NVENC_Presets type exposes the following members. It wasn't unusable, without a doubt, yet NVENC used to eat a ton of subtleties. ffmpeg hevc. After reading MLT and ffmpeg documentation, I tried to tweak Kdenlive render profiles to use NVENC : - NVENC H264 CQP : f=mp4 vcodec=h264_nvenc rc=constqp qp=20 profile=mlt_profile preset=quality acodec=aac ab=192k - NVENC H265 CQP : f=mp4 vcodec=hevc_nvenc rc=constqp qp=20 profile=mlt_profile preset=quality acodec=aac ab=192k. Apr 29, 2020. Jun 07, 2017 · Linux version of NVENC does not allow more than one HEVC decoding session for GTX 950. yuv -c:v h264_nvenc -preset p7 -tune hq -g 120 -b:v 20000k -maxrate 20000k -bufsize 40000k -rc cbr -rc-lookahead 32 -multipass 2 -no-scenecut 0 -b_adapt 1 -spatial-aq 1 -temporal-aq 1 -nonref_p 1 -aq-strength 7 -b_ref_mode middle -bf 4 -f null -. You can lower that crf value to 23 or lower if 24 is too aggressive. mkv Or you are using a constant bit rate, but in comparison with the x264 encoder the quality is worse. 同じpresetでsoftエンコ。違いは一目瞭然だ。 しかし、softとnvencのエンコ速度差は80倍・・・ 悩みどころだね。 じつのところソフトエンコのfastにも負けている。マジですか? あとはnvencを使わずに計算だけopenCLを使うとか・・・ ビルドする根性がねぇ。. gz About: MPlayer is a Unix movie player that can play most standard video formats out of the box and almost all others with the help of external codecs. A is NvEnc on the following screenshots, B is x264 medium. Codecs are different to containers like MP4, MKV and MOV because a codec manages the bitrate, resolution and frames whilst the container organizes and returns the data as sequence. Click to expand I was able to stream with the HQ Low Latency 2Pass on a 650ti Boost 2gb OC edition. 94 and 60 fps video modes. HEVC has a ~15-50% efficiency benefit over h. NVENC and NVDEC can be effectively used with FFmpeg to significantly speed up video decoding, encoding, and end-to-end transcoding. avi" -map 0:0 -an -sn -vf framerate=fps=60:scene=7,zscale=rangein=tv:range=tv -pix_fmt yuv420p -vsync 0 -vcodec hevc_nvenc -preset 5 -profile:v 1 -level 0 -tier main -rc vbr_hq -2pass 1 -qmin 0 -qmax 51 -b:v 1500k -spatial-aq 0 -temporal_aq 0 -surfaces 32 -no-scenecut 0 -refs 3. Is there an easy way for me to select say the ffmpeg 'high performance' ffmpeg preset from the VMIG streaming dialog?. FFmpeg Batch AV Converter is a free universal audio and video encoder, that allows to use the full potential of ffmpeg command line with a few mouse clicks in a convenient GUI with drag and drop, progress information. View the options with: "ffmpeg -h encoder=hevc_nvenc" I have done some light playing with it with settings like "-qp 20 -preset slow -tune hq -profile main10" though it may be better to do "-rc vbr_hq" and specify a bitrate instead. Anyway, across the board, regardless of encoding settings, we drop frames. When I say "install," I'm talking about adding FFmpeg to the Windows path so that it is easier to access via the Command Prompt or other command-line applications like PowerShell. BUG FIX: Using the menu option "Show command(s)" would mark item as "Done". png -c:v h264 test. Most of our testing has been with NVENC h. 264 encoder. ( #246, #247 ) 5. Threading capabilities: none. I can't figure out what the psycho visual tuning is supposed to. What hevc nvenc settings do work with lossless preset in ffmpeg? + Reply to Thread. FFMpegArgs NVENC_Presets GetList Method : SnapStream 21. ts" -vcodec h264_nvenc -preset slow -level 4. 04 LTS (Xenial) only. it Ffmpeg nvenc. mp4" But the quality is not as good as expected. 0-libav mediainfo Install other. mp4" Но качество не так хорошо, как ожидалось. Think putting many frames and audio together and playing them back. $ ffmpeg -i input. Here is the FFmpeg command line that works: ffmpeg -vsync 0 -i Test. I'm using my FFMPEG with the suport of my GPU (NVENC) to convert files from my satelite receiver (SD, mpeg2. ffmpeg -i input_file-c:v h264_nvenc -preset llhq -rc:v vbr_hq -cq:v 19 -b:v 8000k -maxrate:v 12000k -profile:v high -c:a copy output_file. You signed in with another tab or window. First of all a shout out to Will_Tschumy for the work on the H265 NVENC constant quality encoder profile. The problem in UMS is that one parameter is hardcoded for ffmpeg and cant be changed -pix_fmt yuv420p, the encoder h264_nvenc not support this parameter. 인텔의 qsv는 nvenc에 비해 훨씬 간결하며, x264/x265와 유사하게 옵션을 적용할 수 있다. Hello Vouk, in the current ffmpeg build (i think it's 4. Encoder hevc_nvenc [NVIDIA NVENC hevc encoder]: General capabilities: dr1 delay hardware. NVIDIA is integrating the new preset architecture into the FFmpeg support for NVENC soon. When I say "install," I'm talking about adding FFmpeg to the Windows path so that it is easier to access via the Command Prompt or other command-line applications like PowerShell. To install the latest version, you need to configure PPA on your system. The encoder is transparent at 128kbps for most samples tested with artifacts only appearing in extreme cases. For example, if you select the video codec with -vcodec libvpx and use -pre 1080p , then it will search for the file libvpx-1080p. latest Hybrid version , latest nvidia drivers , win10 x64 , nvenc , crashed on every mp4 file after audio encoding settings NVEnc --y4m -i - --fps 29. quicktime (camtasia can use these):. In the example below the work will be executed on the gpu with index 1. Usually, 2500 Bitrate using NVENC is pretty scratchy. mp4 -i subtitles. ts But quality is bad, it looks like it has only 500kb. legacy and new presets in 1080p and 2160p resolution with H. ts" -vcodec h264_nvenc -preset slow -level 4. 2 the problem persists. 04 (Bionic) and 16. ffmpeg -i "e:\input. ffmpeg -hwaccel nvdec -i input. mov -c:v hevc_nvenc -profile main -pixel_format yuv420p -preset. For help installing the drivers on Ubuntu, you may refer to the Ubuntu Knowledge Base. ffmpeg video processing on an old linux/machine, like a i7 860, running Fedora26 can be painful if you only rely on the CPU. 2 API: Namespace:. An installation of FFmpeg compiled against this version of x265 can produce a decent 8bit encode with the following command: ffmpeg -i input. И вся мощь моей системы не используется: Только 11% GPU и 30% CPU. The GTX 780 Ti still encodes with 50-60fps in. A complete, cross-platform solution to record, convert and stream audio and video. Supported hardware devices: cuda cuda d3d11va d3d11va. 264 (NVIDIA® NVENC) encoder for video editing. Most commodity laptops have a resolution of 1366768*, and in such a case, you’d set ffmpeg to capture such a display via -s 1366x768. A is NvEnc on the following screenshots, B is x264 medium. Installation and initial setup We assume you've already set up Nimble Streamer, it's been set up to get an incoming live stream and you've tested basic streaming. 01-3 nvidia-lts 1:470. png' lossless h264: ffmpeg -i frame%04d. mp4" But the quality is not as good as expected. Single-pass MP4 encoding example. i'm trying to encode movies on my nvdia-gpu with ffmpeg and h264_nvenc, but no matter what options i set, the output-file is always the same. See encoder info as shown above. mov -c:v h264_nvenc -pix_fmt yuv420p -preset slow -rc vbr_hq -b:v 8M -maxrate:v 10M -c:a aac -b:a 224k outmovie. Handbrake also has different presets between the CPU (x265) and GPU (NVENC H. Please see `avconv -h | less` or `ffmpeg -h | less` and scroll down to "libx264 AVOptions:". First ffmpeg searches for a file named codec_name-arg. 97fps: ffmpeg -i "inputvideo. ffmpeg -i "e:\input. Most of our testing has been with NVENC h. FFMPEG에서도 nvenc라는 이름으로 인코딩 기능을 지원한다. Options below will be mapped to each other depending on the NVENC API version used. avpreset in the above-mentioned directories, where codec_name is the name of the codec to which the preset file options will be applied. 1 -qmin 10 -qmax 52 "e:\output. This creates a new folder with the same. application, bundling this header saves everyone trying to use NVENC from that headache. 264 encoder but as the name implies. What hevc nvenc settings do work with lossless preset in ffmpeg? + Reply to Thread. Results 1 to 4 of 4 What hevc nvenc settings do work with lossless preset in ffmpeg? Thread Tools. com/FFmpeg/FFmpeg/commit/764f87b6ab8eb08f909a347fd3a804a935f5ea2b. 0 pix-fmt = filter = force-filter = False. NVIDIA is integrating the new preset architecture into the FFmpeg support for NVENC soon. ffmpeg -h encoder=h264_nvenc. access the hardware acceleration abilities of NVENC and NVDEC. mp4 -c:v h264_nvenc -preset llhq -rc constqp -qp 21 -c:a copy out. This problem might not exist on other cards. Same ffmpeg binary, just changing the encoder to the hevc one. Please Note: This guide will remain here for historic purposes but FFmpeg and libav now use libx264's internal -preset, -profile and -tune options. Windows + Kdenlive + NVENC - Part 1: Nvidia H264 & H265 Hardware encoders Rédigé par uTux 14 avril 2021 2 commentaires Kdenlive is a great software but I noticed a major drawback on the Windows version: render time that is really slow. Cài đặt tốt nhất cho FFMpeg với NVENC. Threading capabilities: none. mkv -vcodec hevc_nvenc -preset slow -qmin 1 -qmax 50. Jun 15, 2019 · 同じpresetでsoftエンコ。違いは一目瞭然だ。 しかし、softとnvencのエンコ速度差は80倍・・・ 悩みどころだね。 じつのところソフトエンコのfastにも負けている。マジですか? あとはnvencを使わずに計算だけopenCLを使うとか・・・ ビルドする根性がねぇ。. Though the new NVENC encoder will not be able to use those settings, NVENC supports them, but OBS would need to specifically expose them to the user. MainConcept FFmpeg Plugins make improving video quality and performance fast and easy for any level of user. The header is still MIT licensed and thus fine to bundle with ffmpeg. encodeCodecConfig. Theorically it shoulds use 2 pass encode, and it encodes with half. The encoder is transparent at 128kbps for most samples tested with artifacts only appearing in extreme cases. mp4 -i subtitles. I can't figure out what the psycho visual tuning is supposed to. 4: AQ enabled with auto-variance and edge information. it is being shared with the public in hopes it makes FFmpeg easier to use and allow media jobs to be processed faster. sliceModeData; Is it possible to set a codec-specific parameter like this?. New Release 17. 2 the problem persists. mov -c:v hevc_nvenc -profile main -pixel_format yuv420p -preset. Supported hardware devices: cuda cuda d3d11va d3d11va. Please Note: This guide will remain here for historic purposes but FFmpeg and libav now use libx264's internal -preset, -profile and -tune options. legacy and new presets in 1080p and 2160p resolution with H. avi -c:v nvenc_h264 -preset hq -codec:a libvorbis -qscale:a 3 output. mp4" But the quality is not as good as expected. Video developers can benefit from superior broadcast quality and up to 20% greater efficiency(1) than with x265 while using the familiar FFmpeg interface. In this part 1 of FFmpeg encoding comparisons I look at x264 presets, their speed and output file size. When using h264_nvenc or hevc_nvenc a slowdown of 50fps to 100fps was all presets are SDK10 presets now. mp4 -c:v hevc_nvenc -pix_fmt yuv420p -preset p7 -tune hq -rc:v vbr -cq:v 10 -b:v 0 -profile:v main -rc-lookahead:v 32 g:\video\test. NVENC in the GTX 10-series GPUs provides superior quality than x264 Very Fast, the most commonly used x264 preset. 최근에 업데이트된 SDK에서는 Decoding 인 nvdec 도 지원하는 것으로 되어있지만 아쉽게. h264_cuvid) VideoCodec: encoder: Codec using to encode output video (e. ffmpeg -i input-file. avi" -map 0:0 -an -sn -vf framerate=fps=60:scene=7,zscale=rangein=tv:range=tv -pix_fmt yuv420p -vsync 0 -vcodec hevc_nvenc -preset 5 -profile:v 1 -level 0 -tier main -rc vbr_hq -2pass 1 -qmin 0 -qmax 51 -b:v 1500k -spatial-aq 0 -temporal_aq 0 -surfaces 32 -no-scenecut 0 -refs 3. 265 encoders in the drop down menu or with the command line interface: $ HandBrakeCLI --help | grep -A12 "Select video encoder" -e, --encoder Select video encoder: x264 x264_10bit. nvenc_print_driver_requirement (AVCodecContext *avctx, int level) static av_cold int nvenc_load_libraries (AVCodecContext *avctx) static int nvenc_push_context (AVCodecContext *avctx) static int nvenc_pop_context (AVCodecContext *avctx) static av_cold int nvenc_open_session (AVCodecContext *avctx) static int nvenc_check_codec_support. -c:v nvenc -preset llhq. This gives you a much better overall quality when file size or average bit rate are not constrained (e. [Video] codec = h264_nvenc, h264 max-bitrate = 0 bitrate-ratio = crf = -1 crf-profiles = preset = codec-parameters = dynamic-parameters = False max-width = 1280 profile = max-level = 0. 使用NVENC进行h264编码:. Install the driver from the package: Ubuntu 18. LLHQ (Low Latency High Quality) Preset. exe --preset P4 --vbr 0 --vbr-quality 25-i sample_movie_1080p. Other issues Please check Transcoder troubleshooting article covering most frequent issues. it Ffmpeg nvenc. The command I'm using for encoding: Code: ffmpeg -hide_banner -i "" -map 0:v:0 -map_chapters -1 -map_metadata -1 -vf "crop=1920:800:0:140" -vcodec hevc_nvenc -pix_fmt p010le -preset hq -profile:v main10 -rc constqp -global_quality 21 -rc-lookahead 32 -g 240 -f matroska Video_CQP21_LAF32_GOP240. c" betweenMPlayer-1. 07 did not run without nppc64_10. Ok now select profile "main" "high" "baseline" work! fix OK. mkv ffmpeg-audiodelay=skip handbrake-UsingHardwareEncoding=true. mp4" -map 0:0 -an -sn -vf zscale=rangein=tv:range=tv -pix_fmt yuv420p -vsync 0 -vcodec hevc_nvenc -preset 5 -profile:v 1 -level 0 -tier main -rc vbr_hq -2pass 1 -qmin 0 -qmax 51 -b:v 1500k -surfaces 32 -no-scenecut 0 -refs 3 -nonref_p 1 -strict_gop 1 -bsf:v hevc_mp4toannexb "E:\Temp\5000frames_20_03_45_2010_01. Of course, you'll need to adjust for target bit rates and a fixed cq value. You can lower that crf value to 23 or lower if 24 is too aggressive. Spoiler alert, increasing it to 64 doesn't change the results much anyway. Use slow preset, then -b (int) switch for bframes and -g (int) switch for gop. The encoder is transparent at 128kbps for most samples tested with artifacts only appearing in extreme cases. The help command ffmpeg -h encoder=hevc_nvenc does not mention anything about this. mkv Or you are using a constant bit rate, but in comparison with the x264 encoder the quality is worse. dev and it fails on all archived versions I was able to find. https://github. Supported hardware devices: cuda cuda d3d11va d3d11va. It offers user friendly control over all basic and advanced FFmpeg options. 264 hardware encoding ) uses presets: slow, medium, fast, high performance, high quality, bd, low latency, low latency high quality. I've recently encountered ffmpeg producing macroblock artifacts with levels above 5. 264 compared to x264 slow preset, which is a good quality h. mpg -c hevc --level 5. 265/HVEC (via FFmpeg) but we also tried a number of tests on h. Input stream was read as 30fps by using ffmpeg -r 30 -i rtmp://[addr]. Summary of the bug: When using h264_nvenc or hevc_nvenc a slowdown of 50fps to 100fps was introduced with commit avcodec/nvenc: removed unused and deprecated field. deb packages: dpkg-buildpackage -rfakeroot -b -uc -us. Apr 28, 2019 · ffmpeg -i input. scale_cuda=-1:720 means keep the same aspect ratio and match the other argument. FFmpeg 4 is the latest available version for installation on Ubuntu. For example, if you select the video codec with -vcodec libvpx and use -pre 1080p , then it will search for the file libvpx-1080p. 4: AQ enabled with auto-variance and edge information. I have the latest nVidia driver (457. This slows the stream down to simulate. mp4 -vf scale=1280:-1 -c:v libx264 -preset veryslow -crf 24 output. 04: apt-get install nvidia-460 --no-install-recommends Make sure the non-free component is enabled in sources. That is all for now but these are just few examples of using FFmpeg, you can find more options for what you wish to accomplish. com/FFmpeg/FFmpeg/commit/764f87b6ab8eb08f909a347fd3a804a935f5ea2b. 0 -c:v h264_nvenc -preset llhq -tune zerolatency -qp 10 "${1}" } function vid_compress. Use2Pass="Use Two-Pass Encoding" NVENC. exe or install in bash as an Ubuntu package. $ uname -a Linux laptop 5. 265 encoders in the drop down menu or with the command line interface: $ HandBrakeCLI --help | grep -A12 "Select video encoder" -e, --encoder Select video encoder: x264 x264_10bit. 01-1 opencl-nvidia 470. 264/AVC (via FFmpeg). Encoder h264_nvenc [NVIDIA NVENC H. hevc_nvenv. The presets have the greatest influence on the resulting image quality, but with higher presets the processing time increases enormously. Und in ffmpeg. NVEncC 10417. c I see it's set here: params->codecPicParams. $ uname -a Linux laptop 5. mp4 -b 800k output. FFMPEG에서도 nvenc라는 이름으로 인코딩 기능을 지원한다. mkv I tried with different settings for the nVidia method to increase the quality, but no luck. You can test that in ffmpeg with the following code: ffmpeg -i "yourinput" -vcodec h264_nvenc -preset hp -profile:v main -rc:v vbr -b:v 0 -qmin 10 -qmax 16 Out. Have you tried different presets? i. https://github. 04: apt-get install nvidia-460 --no-install-recommends Make sure the non-free component is enabled in sources. First GPU is 0, second is 1, and so on. Either will work but there are caveats, or you could install both and not worry. 09) installed for my GTX 1070. Threading capabilities: none. PRESET Encoder Settings APPLICATION HIGH QUALITY B Frames, CABAC, 8x8 Transform, All Intra Modes, All Inter Modes*, VBR RC, GopLength 30 TRANSCODING HIGH BITRATE HIGH PERFORMANCE No B Frames, CAVLC, P16x16, Intra16x16 and Intra4x4 Modes, VBR,. png -c:v h264 test. Oct 2, 2017. Last edited: Jan 18, 2019. ffmpeg -y -noautorotate -nostdin -threads 8 -i "F:\TestClips&Co\files\5000frames. It was introduced with the Kepler-based GeForce 600 series in March 2012. ffmpeg -i input -c:v h264_nvenc -pix_fmt nv12 ouput. This is done using specific FFmpeg libraries which we use in addition to our own code. The NVENC codec works fine in other situations like this ffmpeg -y -rtbufsize 2000M -f gdigrab -framerate 60 -offset_x 0 -offset_y 0 -video_size 1280x1080 -i desktop -c:v nvenc -preset:v fast -pix_fmt nv12 out. dll, even if it is not actually required. ffmpeg -i "e:\input. Here is the FFmpeg command line that works: ffmpeg -vsync 0 -i Test. To install the latest version, you need to configure PPA on your system. 使用nvenc加速ffmpeg h. I don't know if it's the ffmpeg implementation that's at fault or encoder itself. NVENC transcode example with utilizing NVIDIA GPU Hardware Acceleration: # time. So the patch is just to add < PRESET_P1 and maybe the same about ctx->tuning_info in #ifdef NVENC_HAVE_NEW_PARAMETERS. scale_cuda=-1:720 means keep the same aspect ratio and match the other argument. Video encoding, decoding and transcoding. First ffmpeg searches for a file named codec_name-arg. I'm at a loss since it works fine if no preset is set. At this point you have a choice - either install ffmpeg for Windows ffmpeg. FFmpeg with NVIDIA GPU. Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 rgb0 gbrp gbrp16le cuda d3d11. for example:. 최근에 업데이트된 SDK에서는 Decoding 인 nvdec 도 지원하는 것으로 되어있지만 아쉽게. mkv test\frame%04d. for example: ffmpeg -hwaccel cuvid -hwaccel_device 0 -fflags +discardcorrupt -c:v h264_cuvid -gpu 0 -probesize 10M -analyzeduration 10M -thread_queue_size. Methods Name Description; Equals: Determines whether the specified object is equal to the current object. 1 -qmin 10 -qmax 52 "e:\output. To that end, I will present my own take on the current “war” between software and hardware encoders, then go into quick details of how to best use AMD GPUs for encoding for video archival with. 04LTS Install the basic graphics packages # apt-get install ffmpeg gxine libdvdread4 icedax tagtool libdvd-pkg easytag id3tool lame libxine2-ffmpeg nautilus-script-audio-convert libmad0 mpg321 libavcodec-extra gstreamer1. Threading capabilities: none. Install ffmpeg and dependencies: sudo dpkg -i. ts" -vcodec h264_nvenc -preset slow -level 4. Anyway, across the board, regardless of encoding settings, we drop frames. Using FFmpeg with NVIDIA GPU Hardware Acceleration This guide explains ways to accelerate video encoding, decoding and end-to-end transcoding on NVIDIA GPUs through FFmpeg. I made a quick video to show my settings but also, it looked like it was better quality then normal. Need to do some more testing. Full hardware transcode example with CUVID and NVENC: # ffmpeg -hwaccel cuvid -c:v h264_cuvid -i input -c:v h264_nvenc -preset slow output. FFmpeg 4 is the latest available version for installation on Ubuntu. Same ffmpeg binary, just changing the encoder to the hevc one. (from -2 to INT_MAX) (default any). gz and MPlayer-1. Theorically it shoulds use 2 pass encode, and it encodes with half. 19 is the recommended setting as its' visually identical to 0, yet preserves good compression trade off. Windows + Kdenlive + NVENC - Part 1: Nvidia H264 & H265 Hardware encoders Rédigé par uTux 14 avril 2021 2 commentaires Kdenlive is a great software but I noticed a major drawback on the Windows version: render time that is really slow. 020 2021-01-20: added link to BuyMeACoffee. 97fps: ffmpeg -i "inputvideo. I'm using my FFMPEG with the suport of my GPU (NVENC) to convert files from my satelite receiver (SD, mpeg2. mp4 -b 800k output. 165 --codec h265 --profile main --level auto --sar. The driver version hits the minimum requirement for nvenc mentioned in various documents on the Internet. And in the new RTX 20 and 30-series, NVENC performs better than x264 Fast and on par with x264 Medium, a preset that requires an expensive dual PC setup. This document describes how to use LCEVC in this specific build. FFmpeg includes the video4linux2 and ALSA input devices that enable capturing webcam and audio input. However the problem occurs with all pixel formats and all variants (h264_nvenc too, e. For further NVENC encoder options, check out this guide. After going back to a stable version of tvheadend 4. The command line instructions can be very hard to masterunderstand, so myFFmpeg does all the hard work for you. There are various FFmpeg encoders that support variable bit rate / constant quality encoding (learn more about rate control modes here). But X264 falls behind when it comes to fast-moving gameplay. ) Finalize: Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. -preset faster 是做了如下设置 --no-mixed-refs --rc-lookahead 20 --ref 2 --. 017 2020-11-11: added SHA-256 hashes on this and archives page and through API. Estou usando meu FFMPEG com o suporte da minha GPU ( NVENC) para converter arquivos do meu receptor de satélite (SD, mpeg2. GPUs based on the Kepler or Maxwell architecture are supported. mp4 ffmpeg version built on 2021-03-24 Patches should be submitted to the ffmpeg-devel mailing list and not this bug tracker. 75 -b_qfactor 1. "Fossies" - the Fresh Open Source Software Archive Source code changes of the file "ffmpeg/libavcodec/nvenc. 97fps: ffmpeg -i "inputvideo. The GTX 780 Ti still encodes with 50-60fps in. Hi Everyone, I was wondering if anyone knew how to use an Nvidia (1070) to decode and encode instead of relying on CPU to decode while encoding with nvenc. Video developers can benefit from superior broadcast quality and up to 20% greater efficiency(1) than with x265 while using the familiar FFmpeg interface. TS-Files) em h264. i'd like to do it with 2-pass encoding, which seems to be possible according to. ffmpeg -i data2. 01-2 nvidia-utils 470. Options below will be mapped to each other depending on the NVENC API version used. ffmpeg -hwaccel cuvid -c:v h264_cuvid -i 3030025890-TEST. crf 대신 q를 사용하면 된다. 94 and 60 fps video modes. png -c:v libx264 -preset ultrafast -qp 0 vid. 04 LTS (Xenial) only. mkv Summary. 01-1 nvidia 470. This PPA contains packages for Ubuntu 18. ) Finalize: Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. /ffmpeg -i InputVideo -vcodec h264_nvenc -b:v 5M -acodec copy Output. Ok now select profile "main" "high" "baseline" work! fix OK. There are two mechanisms to install NVIDIA display drivers. With ffmpeg and a decent GPU (like a Quadro P4000) the h265/HEVC encoder finaly gets a good speedboost with up to 90fps when encoding HD movies with the below parameter values and 200fps when using the GPU accelerated h264 encoder. Though the new NVENC encoder will not be able to use those settings, NVENC supports them, but OBS would need to specifically expose them to the user. ffmpeg -i "e:\input. TS-Files) into h264. FFmpeg Batch AV Converter is a free universal audio and video encoder, that allows to use the full potential of ffmpeg command line with a few mouse clicks in a convenient GUI with drag and drop, progress information. The header is still MIT licensed and thus fine to bundle with ffmpeg. Code: Select all $. The following section compares. Code: BFrames="B-frames" ref="Refs" NVENC. Nvidia NVENC (short for Nvidia Encoder) is a feature in Nvidia graphics cards that performs video encoding, offloading this compute-intensive task from the CPU to a dedicated part of the GPU. FFmpeg 本身是一个庞大的项目,包含许多组件和库文件,最常用的是它的命令行工具。 NVENC:基于 NVIDIA GPU 的 H. ffmpeg -y -i inputfile -c:v nvenc_h264 -b:v 1000k -minrate 500k -maxrate 5000k \ -tier high -profile:v high -level 4. FFmpeg is a free and open-source collection of tools for handling multimedia files. Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 rgb0 gbrp gbrp16le cuda d3d11. mp4 output_yuv. 7z (the file name will vary depending on the current release). Full hardware transcode example with CUVID and NVENC: # ffmpeg -hwaccel cuvid -c:v h264_cuvid -i input -c:v h264_nvenc -preset slow output. To facilitate the evaluation and utilisation of LCEVC as a codec, V-Nova LCEVC libraries are supported by a build of FFmpeg. low latency high performance, lossless, & lossless high performance. mp4" Mas a qualidade não é tão boa quanto o esperado. 04LTS Install the basic graphics packages # apt-get install ffmpeg gxine libdvdread4 icedax tagtool libdvd-pkg easytag id3tool lame libxine2-ffmpeg nautilus-script-audio-convert libmad0 mpg321 libavcodec-extra gstreamer1. 主要AVOptions公有AVOptions-preset主要用来调节编码速度和质量的平衡,虽然libx264和h264_nvenc都有此参数,但是该参数的可选项却不完全相同:preset是通过设置一系列编码参数来实现调节编码速度和质量的效果的,e.