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• 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 ?

• 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.

  


• Send RTSP + Audio to RTMP server with ffmpeg

  7 février 2018, par Emiliano Spada

  I successfully sent an rtsp video stream to rtmp server (facebook) but have not been able to use audio using ffmpeg.

  If I play RTSP from camera locally audio works fine.

  This is the command I use (ubuntu server 16.0.4 LTS - ffmpeg 2.8.11) :

  sudo ffmpeg -f lavfi -i anullsrc -rtsp_transport tcp -i "rtsp://admin:admin@192.168.1.2/mode=real&idc=1&ids=1" -tune zerolatency -vcodec libx264 -g 60 -keyint_min 60 -r 30 -pix_fmt + -b:v 4000k -acodec copy -ar 44100 -b:a 128k -strict experimental -f flv  "rtmp://live-api.facebook.com:80/rtmp/STREAM-KEY"

  Here the full log :
  https://www.dropbox.com/s/vo05n0kehs75iba/ffmpeg-20180207-100549.log?dl=0