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• Revision 55040 : Et toujours sur une idée trouvée sur ...

  1er décembre 2011, par real3t@… — Log

  Et toujours sur une idée trouvée sur ​http://www.ghacks.net/2011/11/30/embed-facebook-twitter-google-plus-without-javascript/ : la forme la plus basique de l’interaction sociale : imprimer la page.

• 2 video decoding with same bitrate android

  4 mars 2016, par Bee

  How to do double decoding(2 videos decoding) with same bit rate android ? I mean I want to play 2 videos in 2 different views but syncronisedly. I found this grafika double decoder. But it is not with same bitrate.
  The documentation says that.
  Any one know any sample project or guideline that I can follow ? Or maybe just can illustrate the steps I have to do ? May be used ffmpeg or something else ? Can anyone plese help me ?

• Ffmpeg : How to transition 2 videos together with a custom alpha channel video

  9 janvier 2023, par Daniel Enrico Botta

  I have these files :

  


  

  • 1.mp4, 2.mp4 (video files)

  


  • wipe.mov (alpha channel wipe)

  


  


  I want to use the wipe.mov as a transition between 1.mp4 and 2.mp4
The wipe.mov should replicate the same feeling as the xfade=transition=wipeleft with the only difference that it should use wipe.mov as input

  


  I have tried to use alphaextract to extract the alphachannel from the wipe.mov and this seems to work well.

  


  The problem is I can't figure out how to overlay and make transparent the correct portions in order to make this.

  


  Unfortunately xfade does not accept a video as input... I had tried something like this :

  


  ffmpeg -y -hide_banner -i 1.mp4 -i 2.mp4 -i wipe.mov -filter_complex \ "[0:v]settb=AVTB,setpts=PTS-STARTPT[v0];[1:v]settb=AVTB,setpts=PTS-STARTPTS\[v1]; \ [v1]scale=1280x720,format=yuva420p,alphaextract[alpha]; \ [v0][alpha]xfade=transition=custom:duration=1[out]" -map "[out]" output.mp4

  


  Does anyone know a way to make this work ?

  


  I have also been looking into lumakey...

  


  UPDATE :

  


  this is what I want to achieve :

  


  https://drive.google.com/file/d/1fBu3bVmtbu5DtxEWAzADRmoVCeCg—tD/view?usp=share_link

  


  this is the wipe.mov :

  


  https://drive.google.com/file/d/1z83chzDe0Iw-oTEduWXBpueIAoZezODD/view?usp=share_link