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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.

  


• avcodec/nvdec : Add support for decoding monochrome av1

  6 décembre 2020, par Philip Langdale

  avcodec/nvdec : Add support for decoding monochrome av1
  The nvidia hardware explicitly supports decoding monochrome content,
  
  presumably for the AVIF alpha channel. Supporting this requires an
  
  adjustment in av1dec and explicit monochrome detection in nvdec.
  I'm not sure why the monochrome path in av1dec did what it did - it
  
  seems non-functional - YUV440P doesn't seem a logical pix_fmt for
  
  monochrome and conditioning on chroma sub-sampling doesn't make sense.
  
  So I changed it.
  I've tested 8bit content, but I haven't found a way to create a 10bit
  
  sample, so that path is untested for now.
  

  • [DH] libavcodec/av1dec.c
  • [DH] libavcodec/nvdec.c
  • [DH] libavcodec/version.h

• I recompile ffmpeg using nividia CUDA Toolkit inder to implement hardware acceleration.what is the reason of the compilation error [on hold]

  12 juillet 2017, par 秦先生

  I recompile ffmpeg in window 7 operation system using nividia CUDA Toolkit inder to implement encoder and decoder employ hardware acceleration.
  I use msys2 compile ffmpeg which Support nividia hardware acceleration,
  tried to follow the instruction on nvidias website.
  configured with ./configure —enable-nonfree —enable-nvenc —enable-cuda —enable-cuvid —ena ble-libnpp —extra-cflags=-Ilocal/include —extra-cflags=-I../include —extra-ld flags=-L../lib
  ,this is the error ,the log file ffbuild/config.log contain this error : this is the location of the previous definition
  gcc -L../lib -Wl,—nxcompat,—dynamicbase -Wl,—high-entropy-va -Wl,—as-needed -Wl,—image-base,0x140000000 -o /tmp/ffconf.eoLFY0Lt.exe /tmp/ffconf.Z00DOpJQ.o -lnppi -lnppc -lm -pthread -pthread -lpsapi -ladvapi32 -lshell32
  ../lib/nppc.lib(nppc64_80.dll.b) :(.text+0x2) : relocation truncated to fit : R_X86_64_32 against symbol `__imp_nppGetLibVersion’ defined in .idata$5 section in ../lib/nppc.lib(nppc64_80.dll.b)
  collect2 : error : ld returned 1 exit status
  ERROR : libnpp not found
  where common folder is from downloaded NVIDIA Video Codec SDK.
  My computer configuration : cpu:intel(R) core(TM) i3-4170 3.70HZ RAM 16GB operate system win7 64 bit

  I used software : ffmpeg 3.2.4 gcc 5.3.0