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• FFmpeg transcode GIF into Mp4 and Mp4 to AVI using GPU

  9 octobre 2023, par Cristian

  I'm trying to convert GIF animated to mp4 and mp4 to AVI with FFmpeg.

  


  I started to use just the CPU, but I have to process millions of GIFs/mp4 content pieces. So, I started to have a lot of errors processing them, and it ended as a bottleneck. Therefore, I'm trying to use GPU to process the videos.

  


  Converting GIF to mp4 with CPU, I run the following command :

  


  ffmpeg -i animated.gif -movflags faststart -pix_fmt yuv420p -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" video.mp4


  


  Using the GPU I'm trying the following :

  


  ffmpeg
  -y
  -hwaccel nvdec
  -hwaccel_output_format cuda
  -i gifInputPath
  -threads 1
  -filter_threads 1
  -c:v h264_nvenc
  -vf hwupload_cuda,scale_cuda=-2:320:240:format=yuv420p
  -gpu 0
   mp4VideoPath


  


  The above command generates an exit status 1.

  


  The following is the dmesg command log

  


  Converting mp4 videos to AVI videos I'm running the following command

  


  ffmpeg
-i videoInputPath
-vcodec rawvideo
-pix_fmt yuv420p
-acodec pcm_s16le
-ar 44100
-ac 2
-s 320x240
-r 4
-f avi
aviOutputVideoPath


  


  For GPU I tried :

  


  ffmpeg
 -y
 -hwaccel cuda
 -hwaccel_output_format cuda
 -i videoInputPath
 -threads 1
 -filter_threads 1
 -c:a pcm_s16le
 -ac 2
 -ar 44100
 -c:v h264_nvenc
 -vf hwupload_cudascale_cuda=-2:320:240:format=yuv420p
 -r 4
 -f avi
 -gpu 0
 aviOutputVideoPath


  


  The following is the dmseg output is log

  


  


  1. What should be the best command for converting the GIF into Mp4 and Mp4 into AVI based on CPU configuration using the GPU(Amazon Nvidia t4) for best performance, low CPU, and moderated GPU consumption ?

     


  


  2. What are the best suggestions to Process these content pieces concurrently using GPU ?

     


  


  


  Note : I'm using Golang to execute the FFmpeg commands.

  


• Revision 29746 : Gestion de la file d’attente

  8 juillet 2009, par kent1@… — Log

  Gestion de la file d’attente

• Unable to extract subclip from a video made by cv2.VideoWriter

  9 août 2021, par Nandan Dubey

  I am extracting a sub clip from a video and processing it into filename1.mp4. And again, when I am trying to extract a sub clip it gives me an error. Below is the code

  


  ffmpeg_extract_subclip('Office.mp4', 20, 40, targetname="trim.mp4")

result = cv2.VideoWriter('filename1.mp4',
                         cv2.VideoWriter_fourcc(*'mp4v'),
                         30, (int(width), int(height)))


ffmpeg_extract_subclip("filename1.mp4", start_time, start_time + 1, targetname=target)


  


  And here is the error :

  


  Traceback (most recent call last):&#xA;  File "C:/Users/nanda/OneDrive/Desktop/Teasit/Object tracking/object.py", line 459, in <module>&#xA;    extract_clip(tracker_time)&#xA;  File "C:\Users\nanda\OneDrive\Desktop\Teasit\Object tracking\cuda.py", line 12, in extract_clip&#xA;    ffmpeg_extract_subclip(r"filename1.mp4", start_time, start_time &#x2B; 1, targetname=target)&#xA;  File "C:\Users\nanda\OneDrive\Desktop\Teasit\Object tracking\venv\lib\site-packages\moviepy\video\io\ffmpeg_tools.py", line 41, in ffmpeg_extract_subclip&#xA;    subprocess_call(cmd)&#xA;  File "C:\Users\nanda\OneDrive\Desktop\Teasit\Object tracking\venv\lib\site-packages\moviepy\tools.py", line 54, in subprocess_call&#xA;    raise IOError(err.decode(&#x27;utf8&#x27;))&#xA;OSError: ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers&#xA;  built with gcc 9.2.1 (GCC) 20200122&#xA;  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt&#xA;  libavutil      56. 31.100 / 56. 31.100&#xA;  libavcodec     58. 54.100 / 58. 54.100&#xA;  libavformat    58. 29.100 / 58. 29.100&#xA;  libavdevice    58.  8.100 / 58.  8.100&#xA;  libavfilter     7. 57.100 /  7. 57.100&#xA;  libswscale      5.  5.100 /  5.  5.100&#xA;  libswresample   3.  5.100 /  3.  5.100&#xA;  libpostproc    55.  5.100 / 55.  5.100&#xA;[mov,mp4,m4a,3gp,3g2,mj2 @ 0000023543009dc0] moov atom not found&#xA;filename1.mp4: Invalid data found when processing input&#xA;</module>