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• Acceptable Video Size For Social Network With FFMpeg

  2 août 2022, par John Santos

  I'm building a social network on Android and using FFMPeg to compress the videos before uploading them. Videos will have maximum 1 minute of duration.

  



  The original video for test has 87.74Mb 1080x1920.

  



  Trying to find the middle point between quality and file size I could get to a video size of either 26Mb with an "meh" quality (which I'm not happy with) or 33.06Mb with a good quality (scaling the video to 480x852).

  



  Problems :

  



  1) It's taking an average of 2min 30sec to compress a 1 minute video !

  



  2) Even 25Mb seems to be too much for a 1 minute video for a social network

  



  The ask :

  



  1) Any clue how do Instagram and Facebook do it to compress and upload the same video above within 1 minute !!?? I know they compress it cause the quality is not the same when on Facebook/Instagram but how to they get it done that fast ?

  



  2) What would it be an acceptable file size for a 1 minute video on Facebook/Instagram ? I'm worried about wasting too much storage for 1 minute videos. Does anyone have any idea about it ?

  



  ---

  



  I'm searching a lot about FFMpeg commands to get it better and better but it would be easier if I had in mind what I want to achieve.

  


• FFmpeg for automatic video generation from images ?

  22 janvier 2018, par Dionisis K

  I want to implement an automatic video generation from images, like facebook’s anniversary video. And I would also like to add some filters. I’ve been searching a lot and read FFmpeg’s documentation which is pretty amazing.

  In the future I want to have 10-20 "bashscripts" with different filters leading to different themes (e.g. fade-in, zoom, overlay images, left-to-right, etc..)

  So my biggest concern is having an interface which offers readable code and provides scalability. Since ffmpeg is a bashscript i searched for a wrapper

  There are wrappers in

  • https://github.com/PHP-FFMpeg/PHP-FFMpeg for php ,which doesn’t support image convertion to videos and complex filters .
  • https://github.com/fluent-ffmpeg/node-fluent-ffmpeg which looks promising but also difficult to go with complex filters
  • and https://github.com/kkroening/ffmpeg-python for python.I think that it s pretty good

  Are there any other wrappers worth to check ?
  Would you recommend something from the above ?
  Is there any pros and cons using a specific programming language for this particular case ?
  Is there anything else i should bear in mind before I make a decision ?

• ffmpeg streaming to rtmp at 30fps

  19 janvier 2018, par user6326558

  I am trying to stream my desktop to facebook rtmp server using screen-capture-recorder :

   -re  -rtbufsize 256M -f dshow -i audio="Mikrofon (Realtek Audio)" 
  
  -rtbufsize 256M -f dshow -i audio="virtual-audio-capturer"  
  
  -rtbufsize 1024M -f dshow -i video=screen-capture-recorder -r 30  
  
  -filter:v scale=1280:720 -c:v  h264_nvenc -pix_fmt yuv420p -preset fast 
  
  -b:v 8M -maxrate:v 10M  -c:a aac -b:a 128k -ar 44100 
  
  -f flv rtmp://live-api.facebook.com:80/rtmp/..............

  I am using h264_nvenc codec for gpu acceleration, but I can stream at only 12-18 fps. However, when I stream into a file :

   -re  -rtbufsize 256M -f dshow -i audio="Mikrofon (Realtek Audio)" 
  
  -rtbufsize 256M -f dshow -i audio="virtual-audio-capturer"  
  
  -rtbufsize 1024M -f dshow -i video=screen-capture-recorder -r 30  
  
  -filter:v scale=1280:720 -c:v  h264_nvenc -pix_fmt yuv420p -preset fast 
  
  -b:v 8M -maxrate:v 10M  -c:a aac -b:a 128k -ar 44100 
  
  D:\test.mp4 -y

  I get 30 fps without problem, even when playing game (eg. Call of duty 6, pretty HW draining). Is it also possible to stream to rtmp at 30 fps with my command configuration ? Thank you

  If needed, my ffmpeg build config is :

  ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers

  built with gcc 7.1.0 (GCC)
  configuration : —disable-static —enable-shared —enable-gpl —enable-version3 —enable-cuda —enable-cuvid —enable-d3d11va —enable-dxva2 —enable-libmfx —enable-nvenc —enable-avisynth —enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libfreetype —enable-libgme —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenh264 —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs —enable-libxvid —enable-libzimg —enable-lzma —enable-zlib