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• Does using FFMPEG source code execute faster than using it by commands on Android ? [on hold]

  13 décembre 2018, par Valgrind1691

  I am using FFMPEG library for video processing on Android application. I use it by framing commands. However the processing time is too much even for short videos and using preset as ultrafast and all possible online suggestion for optimizing commands.
  I was wondering if writing C/C++ code using FFMPEG source to do all the process that command is doing and create a library for Android to be consumed using JNI will it make process faster ?

• Why this ffmpeg mp4/mkv/wmv/flv/avi to webm command line with cuda is as slow as with CPU ?

  2 février 2023, par uchi

  im playing with my video files, I want to convert them from mp4, mkv, wmv, avi, flv, mov... to webm.

  


  So I have written this :

  


  for file in *
    do   
if [ -f "$file" ]
    then     filename="${file%.*}"
    ../ffmpeg -hwaccel nvdec -hwaccel_device 0 -hwaccel_output_format cuda -i "$file" -c:v vp9 -b:v 0 -crf 31 -c:a libvorbis "$filename".webm
fi
done


  


  As shown, I have compiler my own ffmpeg binary, with those options :

  


  ./configure --enable-gpl --enable-libx264 --enable-nonfree --enable-cuda-nvcc --enable-libvpx --enable-vaapi --enable-libvorbis  --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64


  


  It works, but, with CPU I got speed 0,1x and with cuda... almost the same.

  


  My CPU ? 11th Gen Intel(R) Core(TM) i7-11800H

  


  My GPU ? GeForce RTX™ 3060 mobile

  


  Filesize ? 300-3000mb (same speed with any)

  


  Is there anything I could do ? (I also tried vp9_vaapi, getting

  


  Impossible to convert between the formats supported by the filter 'Parsed_null_0' and the filter 'auto_scale_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented


  


  Any clue ? Or do I have to give up ?

  


  Thanks

  


• Any solution for ffplay in Android ?

  5 novembre 2019, par ALirezaSO

  I’m trying to add GoPro (Hero) inside my app and I wanted to have live streaming to make my solution complete. Thanks to KonradIT who was committed to this task, I found most of what i need there. Anyway, my main concern is about live streaming. He has a solution for this which is based on ffmpeg, but it has two main problems aside from some minor bug fixings. First, the output is not scalable and just shows a tiny picture which is not resizable. The other is its very low FPS (less than 17 FPS). We have a delay about six seconds too.
  On the PC side, we have a very simple solution using ffplay. It’s just a line of code and works as one expected. But on Android, I have no clue how to use ffplay directly. Here some claimed that Android WarZone supports ffplay but as I’ve tested it, there’s no support (in the Android WarZone page they just talked about ffplay on the PC side). So, to wrap things up, I’ve two problem :
  1- Is there any solution for running ffplay in Android ?
  2- How can we convert its output to a live video ?