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• Can I convert a live stream stream using ffmpeg to mpeg2video but using GPU instead of CPU ?

  10 janvier 2023, par Gera Ponce

  As most of you know, Nvenc does not support to encode to mpeg2video, the only way i could find is to encode it using CPU, by using "-c:v mpeg2video" and the nvidia card is not working in this process.. Is there a way to use the GPU nvidia to encode to mpeg2video instead of leaving the work to CPU only ? I guess without using the nvenc codec ?

  


  I have tried to use -hwaccel_device (nvidia id) and -hwaccel_output_format cuda, with -c:v mpeg2video, but all work is being done by the CPU.

  


  Also tried the -gpu (nvidia id), but it won't make the GPU to take the process either..

  


• FFMPEG : Impossible to convert between the formats supported by the filter

  30 avril 2018, par Netheme

  Trying to decode & encode the video in FFMPEG on my GPU. Using this command :

  ffmpeg -y -c:v mpeg2_cuvid -vsync 0 -deint 2 -drop_second_field 1 -surfaces 10 -i 'udp://@227.10.20.149:1234?fifo_size=100000000'  -map i:0x12c -r 25 -filter fps=30,scale_npp=640:360:format=same:interp_algo=lanczos -aspect 16:9 -g 96 -vcodec h264_nvenc -b 400K -minrate 400k -maxrate 400k -f mpegts 'udp://@239.0.0.12:1000?overrun_nonfatal_option=1'

  But FFMPEG still giving me this output :

    Using -vsync 0 and -r can produce invalid output files
  
    Stream mapping:
  
    Stream #0:8 -> #0:0 (mpeg2video (mpeg2_cuvid) -> h264 (h264_nvenc))
  
    Stream #0:8 -> #1:0 (mpeg2video (mpeg2_cuvid) -> h264 (h264_nvenc))
  
    Stream #0:8 -> #2:0 (mpeg2video (mpeg2_cuvid) -> h264 (h264_nvenc))
  
    Stream #0:8 -> #3:0 (mpeg2video (mpeg2_cuvid) -> h264 (h264_nvenc))
  
    Stream #0:9 -> #4:0 (mp2 (native) -> aac (native))
  
    Stream #0:10 -> #5:0 (mp2 (native) -> aac (native))
  
    Press [q] to stop, [?] for help
  
    [mpegts @ 0x55c260173b20] frame size not set
  
    Output #5, mpegts, to 'udp://@239.0.0.12:1005?overrun_nonfatal_option=1':
  
    Metadata:
  
      encoder         : Lavf57.83.100
  
      Stream #5:0(eng): Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.107.100 aac
  
  [mpegts @ 0x55c260172560] frame size not set
  
  Output #4, mpegts, to 'udp://@239.0.0.12:1004?overrun_nonfatal_option=1':
  
    Metadata:
  
      encoder         : Lavf57.83.100
  
      Stream #4:0(por): Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.107.100 aac
  
  Impossible to convert between the formats supported by the filter 'Parsed_fps_0' and the filter 'auto_scaler_0'
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: Function not implemented
  
  Error while processing the decoded data for stream #0:8
  
  [aac @ 0x55c260173020] Qavg: 347.777
  
  [aac @ 0x55c260173020] 2 frames left in the queue on closing
  
  [aac @ 0x55c260174ac0] Qavg: 339.059
  
  [aac @ 0x55c260174ac0] 2 frames left in the queue on closing
  
  Conversion failed!

  My version of FFMPEG :

  ffmpeg version n3.4.2-9-ga877ab75eb Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-libzvbi --enable-libnpp --enable-cuda --enable-cuvid --enable-nvenc --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64 --enable-gpl --enable-libx264 --disable-x86asm --enable-libx265 --enable-libfdk-aac --enable-nonfree
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
  
  
  
  Use -h to get full help or, even better, run 'man ffmpeg'

  I tried to change the output codec to hevc_nvenc, nvenc_hevc (all available from Nvidia), but still getting this error. What I am doing wrong ?
  Thanks for tips.

• Using 'overlay_cuda' in ffmpeg with transparency in input frames

  16 mai 2023, par time4tea

  I'm trying to overlay a full frame image on top of an MP4, in ffmpeg, using as much hardware-assistance as possible.

  


  This is for https://github.com/time4tea/gopro-dashboard-overlay

  


  I have the non-GPU overlay working totally fine, and would like to take advantage of the GPU now.

  


  The inputs to ffmpeg are :

  


  

  • a stream from an MP4 file - with 1 audio and 1 video stream

  


  • frames from the dashboard software, which are supplied as raw RGBA frames, at the same frame size as the movie.

  


  


  I've managed to get the overlay sort of working using the nvidia extensions, but it doesn't work as it uses nv12 frame formats which don't have any idea of transparency (AFAIK) so the overlaid frame completely obscures the movie frame - makes sense.

  


  The incantation that does this is (put on separate lines to try to keep the different sections - inputs / transforms / outputs - obvious) :

  


  ffmpeg -y -report -hide_banner -loglevel info 
-hwaccel cuda -hwaccel_output_format cuda 
-i movie.mp4 
-f rawvideo -framerate 10.0 -s 1024x576 -pix_fmt rgba -i - 
-filter_complex [0:v]null[mp4_stream];[1:v]format=nv12,hwupload_cuda[overlay_stream];[mp4_stream][overlay_stream]overlay_cuda,hwdownload,format=nv12 
-vcodec h264_nvenc 
-rc:v cbr -b:v 20M -bf:v 3 -profile:v high -spatial-aq true 
-movflags faststart 
output.mp4


  


  When i try to use yuva420p (which I believe is the correct format, but happy to be corrected) - in all various different places, for example :

  


  ffmpeg -y -report -hide_banner -loglevel info 
-hwaccel cuda -hwaccel_output_format yuva420p 
-i movie.mp4 
-f rawvideo -framerate 10.0 -s 1024x576 -pix_fmt rgba -i - 
-filter_complex [0:v]null[mp4_stream];[1:v]format=yuva420p,hwupload_cuda[overlay_stream];[mp4_stream][overlay_stream]overlay_cuda,hwdownload,format=yuva420p -vcodec h264_nvenc 
-rc:v cbr -b:v 20M -bf:v 3 -profile:v high -spatial-aq true -movflags faststart output.mp4



  


  I get flavours of the same error message :

  


  Impossible to convert between the formats supported by the filter 'Parsed_null_0' and the filter 'auto_scaler_1'

  


  AIUI - auto scalers are inserted into the pipeline when things don't match resolutions or formats - but here everything should match ?

  


  Using a filter_complex of [1:v]format=yuva420p,hwupload_cuda[overlay_stream];[0:v][overlay_stream]overlay_cuda,hwdownload,format=yuva420p i.e not using a null filter, which I put in just to make quickly changing filters easy, has the same error.

  


  Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scaler_1'

  


  I have looked at the suggested similar questions, and they don't appear to solve the problem for me.

  


  Thanks for any suggestions !