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• Where are there working exdamples for QSV enabled ffmpeg filters ?

  2 août 2021, par Bart Lederman

  I'm re-posting this question in a modified form because I'm told that stack overflow doesn't allow anyone to ask for the location of documentation. So now I'm not asking for documentation, I just want working examples of how the QSV enabled filters are used, with a specific question on why async doesn't work with vpp_qsv .

  


  I have a PC running Windows which is QSV capable. I've found the codec and at least one QSV filter which really speed up decoding and encoding AVC (x264) videos.

  


  But the experience is extremely aggravating, as I cannot find a list anywhere that I can find on what the filters and arguments actually are.

  


  The closest I've come for vpp_qsv is this :

  


  https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/vf_vpp_qsv.c

  


  It's a good start, but it has no examples of what the arguments actually are.
Source code doesn't explain how the filters actually work. However, this source code does say that async_depth is a valid qualifier.

  


  The few examples I've been able to find in various places (including stackoverflow) do not work.

  


  By experimentation, I've found that this works :

  


  ffmpeg -hide_banner -init_hw_device qsv=qsv -hwaccel qsv -i "input.mts" -c:a aac -c:v h264_qsv -preset veryslow -vf "vpp_qsv=cw=628:cx=0:w=640:h=480" -q:v 30 "output.mp4"

  


  I can add other things to the filter. For example :

  


  "vpp_qsv=deinterlace=2:cw=628:cx=0:w=640:h=480"

  


  will work. However, this will NOT work :

  


  "vpp_qsv=cw=628:cx=0:w=640:h=480:async_depth=4"

  


  even though there are examples posted that say it will.

  


  [Parsed_vpp_qsv_0 @ 0000000005bff8c0] Option 'async_depth' not found [AVFilterGraph @ 0000000007327dc0] Error initializing filter 'vpp_qsv' with args 'cw=628:cx=0:w=640:h=480:async_depth=4' Error reinitializing filters ! Failed to inject frame into filter network : Option not found Error while processing the decoded data for stream #0:0

  


  I also have been unable to find good examples of using more than one QSV enabled filter at the same time.

  


  I'm using the newest version of ffmpeg I can find :

  


  I :\ffmpeg -version ffmpeg version 4.4-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers built with gcc 10.2.0 (Rev6, Built by MSYS2 project) configuration : —enable-gpl —enable-version3 —enable-static —disable-w32threads —disable-autodetect —enable-fontconfig —enable-iconv —enable-gnutls —enable-libxml 2 —enable-gmp —enable-lzma —enable-libsnappy —enable-zlib —enable-librist —enable-libsrt —enable-libssh —enable-libzmq —enable-avisynth —enable-libbluray —enab le-libcaca —enable-sdl2 —enable-libdav1d —enable-libzvbi —enable-librav1e —enable-libsvtav1 —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxvid —ena ble-libaom —enable-libopenjpeg —enable-libvpx —enable-libass —enable-frei0r —enable-libfreetype —enable-libfribidi —enable-libvidstab —enable-libvmaf —enable-lib zimg —enable-amf —enable-cuda-llvm —enable-cuvid —enable-ffnvcodec —enable-nvdec —enable-nvenc —enable-d3d11va —enable-dxva2 —enable-libmfx —enable-libglslang - -enable-vulkan —enable-opencl —enable-libcdio —enable-libgme —enable-libmodplug —enable-libopenmpt —enable-libopencore-amrwb —enable-libmp3lame —enable-libshine - -enable-libtheora —enable-libtwolame —enable-libvo-amrwbenc —enable-libilbc —enable-libgsm —enable-libopencore-amrnb —enable-libopus —enable-libspeex —enable-libv orbis —enable-ladspa —enable-libbs2b —enable-libflite —enable-libmysofa —enable-librubberband —enable-libsoxr —enable-chromaprint libavutil 56. 70.100 / 56. 70.100 libavcodec 58.134.100 / 58.134.100 libavformat 58. 76.100 / 58. 76.100 libavdevice 58. 13.100 / 58. 13.100 libavfilter 7.110.100 / 7.110.100 libswscale 5. 9.100 / 5. 9.100 libswresample 3. 9.100 / 3. 9.100 libpostproc 55. 9.100 / 55. 9.100

  


  and the output of "ffmpeg -filters" says I have the various QSV enabled filters on my system.

  


  I have searched dozens and dozens of sites including Intel and ffmpeg.org and I cannot find a clear explanation of how the various QSV enabled filters work, with examples that will actually execute on my system. Could someone please point me to where this filter is explained ? (This is NOT, I repeat, NOT a banned request for documentation. I'm asking how to use a specific qualifier in a specific filter.)

  


• Hardware acceleration FFMPEG not speeding up rendering at the moment

  13 août 2021, par AlphaDjango

  I currently have ffmpeg running on a computer (ubuntu server 20.04) with a nvidia MSI GTX 1660 6GB GAMING X TWIN FORZ 7 GRAPHICS CARD and a Ryzen 5 3600 cpu. I have installed the nvidia drivers for linux for it.

  


  Currently when enabling and disabling hardware acceleration the rendering takes the same amount of time which is around 1 minute to render per 1 minute of footage.

  


  When using a similar setup in davinci resolve it takes 1/4 of the time to apply similar background effects and concating the clips which makes me question if I am using hardware acceleration of if my ffmpeg command is not optimised for it ?

  


  This is the code which takes in around 50 mp4 clips and joins them together, scales them in size and applies a background blur on the sides of clips

  


  ffmpeg  -hwaccel cuda  -f concat -safe 0 -i /home/anon/project/MEDIAFILES/work_ffmpeg_space/concat_file_user_root_projectId_1.txt  -s 1920x1080 -filter_complex '[0:v]scale=ih*16/9:-1:flags=bicubic,boxblur=luma_radius=min(h\,w)/20:luma_power=2:chroma_radius=min(cw\,ch)/20:chroma_power=1[bg];[bg][0:v]overlay=(W-w)/2:(H-h)/2,crop=h=iw*9/16' -af aselect=concatdec_select,aresample=async=1  /home/anon/project/MEDIAFILES/created_videos/finalvideo_user_root_projectId_1.mp4


  


  Any tips or ways to optimise the code to use hardware acceleration will be greatly appreciated !

  


  This is my ffmpeg configuration

  


    ffmpeg version N-103221-gc3ef9e0277 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-17ubuntu1~20.04)
  configuration: --pkg-config-flags=--static --enable-nonfree --enable-gpl --enable-version3 --enable-libmp3lame --enable-libvpx --enable-libopus --enable-opencl --enable-libxcb --enable-opengl --enable-nvenc --enable-vaapi --enable-vdpau --enable-ffplay --enable-ffprobe --enable-libxvid --enable-libx264 --enable-libx265 --enable-openal --enable-openssl --enable-cuda-nvcc --enable-cuvid --extra-cflags=-I/usr/lcal/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64 --extra-libs=-lpthread
  libavutil      57.  3.100 / 57.  3.100
  libavcodec     59.  4.101 / 59.  4.101
  libavformat    59.  4.101 / 59.  4.101
  libavdevice    59.  0.100 / 59.  0.100
  libavfilter     8.  1.103 /  8.  1.103
  libswscale      6.  0.100 /  6.  0.100
  libswresample   4.  0.100 /  4.  0.100
  libpostproc    56.  0.100 / 56.  0.100


  


• Need to concatenate several MP4 from Garmin dashcam with telemetry

  28 juillet 2021, par Suporte JM

  I have a Garmin 66W dashcam for my work (street mapping surveyor) which produces several 1min. MP4 videos of my journey (60 min. = 60 videos). All these videos have telemetry data on it as metadata (GPS location, speed, etc...).

  


  I want to concatenate every 5 files excluding the audio but preserving the video and the telemetry in the metadata.

  


  What I have tried so far :

  


  

  • Export GPS information as GPX file (result : successful)

  


  


  exiftool -p gpx.fmt -ee X:\video_place\videos_1m\GRMN0005.mp4 > GRMN0005.gpx

  


  

  • Merge MP4 videos as a single MP4 video (result : partially successful)

  


  


  ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c copy X:\video_place\videos_1m\GRMN0005to0011.mp4

  


  When I use above command on ffmpeg I loose all my telemetry data.

  


  I tried in several different ways for days, searching on several forums, I even tried to export all GPS data from each single 1min. file merge them, and them merge the videos and put the telemetry back.

  


  The ffprobe output of my 1min. video is as following :

  


   Metadata:
    major_brand     : avc1
    minor_version   : 0
    compatible_brands: avc1isom
    creation_time   : 2021-07-26T17:08:23.000000Z
  Duration: 00:01:00.06, start: 0.000000, bitrate: 19553 kb/s
  Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 19182 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)
    Metadata:
      creation_time   : 2021-07-26T17:08:23.000000Z
      handler_name    :  Ambarella AVC
      vendor_id       : [0][0][0][0]
      encoder         : Ambarella AVC encoder
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2021-07-26T17:08:23.000000Z
      handler_name    :  Ambarella AAC
      vendor_id       : [0][0][0][0]
  Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s (default)
    Metadata:
      creation_time   : 2021-07-26T17:08:23.000000Z
      handler_name    :  Ambarella EXT


  


  When I use the ffmpeg code above to concatenate the videos, I get the following ffprobe without the telemetry :

  


  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'X:\video_place\videos_1m\GRMN0005to0011.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf59.4.100
  Duration: 00:07:00.42, start: 0.000000, bitrate: 19313 kb/s
  Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 19178 kb/s, 29.97 fps, 29.97 tbr, 30k tbn (default)
    Metadata:
      handler_name    :  Ambarella AVC
      vendor_id       : [0][0][0][0]
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 127 kb/s (default)
    Metadata:
      handler_name    :  Ambarella AAC
      vendor_id       : [0][0][0][0]


  


  I have tried as well with following code, but none of them seems to work :

  


  ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c copy -scodec copy X:\video_place\videos_1m\GRMN0005to0011_scodec.mp4

  


  ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c:s copy -c:v copy X:\video_place\videos_1m\GRMN0005to0011.mp4

  


  ffmpeg -f concat -safe 0 -i X:\video_place\videos_1m\mylist.txt -c copy -c:s mov_text X:\video_place\videos_1m\GRMN0005to0011.mp4

  


  Can a good soul please guide me on how to perform this ? I thought it was going to be simple...