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• Revision 75916 : une fonction saisies_aplatir_chaine() qui permet de supprimer les ...

  16 septembre 2013, par maieul@… — Log

  une fonction saisies_aplatir_chaine() qui permet de supprimer les sous-groupes dans une chaîne de datas
  Exemple :

  *Visible à l'œil nu
Vega|Véga
Arcturus|Arcturus
Antares|Antarés
Deneb|Deneb
* Visible au télèscope
Alkaid|Alkaïd
Dubhe|Dubhe
/*
Kornephoros|Kornephoros
AlbireoA|Albiréo A (rouge)
AlbireoB|Albiréo B (bleue)
Rasalgethi|Rasalgethi

  devient

  Vega|Véga
Arcturus|Arcturus
Antares|Antarés
Deneb|<a class="missing wiki">DenebAlkaid?</a>|Alkaïd
Dubhe|<a class="missing wiki">DubheKornephoros?</a>|Kornephoros
AlbireoA|Albiréo A (rouge)
AlbireoB|Albiréo B (bleue)
Rasalgethi|Rasalgethi

• Segmenting video into different parts and unique rendering on each part then concat afterwards

  2 mars 2016, par goudarziha

  I currently have a very poorly performing application that splits up a video, renders it and the concats all rendered videos on android using ffmpeg

  So I am running into issues with segmenting a video up into 5 parts at each different intervals/durations, rendering each video segment uniquely slowing up/speeding up and then finally concat all the segments back into one final video.

  Currently I am doing each part separately -

  Segmenting -
  example for one segment
  -y -i pathIn -ss 0.0 -t 2.0 -vcodec copy -acodec copy -an pathOut

  Rendering - example slowing down/speeding up
  
   y -i path -filter:v setpts=2.0*PTS pathOut

  Concat -
  
   f concat -i input1.mp4 -i input2.mp4 -i input3.mp4 -i input4.mp4 -i input5.mp4 -c copy output.mp4

  Right now I am running different separate thread for each editing of video, so 3, segment, rendering and concat.

  I am trying to get this all done on one command ffmpeg line if at all possible, if not just the segmenting and rendering of the videos and kick of the concat cmd line later.

  I am trying to emulate something similar to this https://trac.ffmpeg.org/wiki/Creating%20multiple%20outputs

• How do we determine the required dependencies for ffmpeg

  15 mars 2021, par user3656901

  I've installed ffmpeg on ubuntu. I am going to copy the compiled ffmpeg and required dependencies to a directory and copy that directory to another machine. This way we can run ffmpeg on another machine without installation. How do we determine the required dependencies to copy ? Saw instruction on this page : https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu, but it didn't explain the required dependencies for ffmpeg.

  


  When I used ldd ffmpeg, I got something like :

  


      linux-vdso.so.1 (0x00007fffe20fd000)
    libavdevice.so.58 => /lib/x86_64-linux-gnu/libavdevice.so.58 (0x00007fc116e90000)
    libavfilter.so.7 => /lib/x86_64-linux-gnu/libavfilter.so.7 (0x00007fc116b10000)
    libavformat.so.58 => /lib/x86_64-linux-gnu/libavformat.so.58 (0x00007fc116890000)
    libavcodec.so.58 => /lib/x86_64-linux-gnu/libavcodec.so.58 (0x00007fc1152d0000)
    libavresample.so.4 => /lib/x86_64-linux-gnu/libavresample.so.4 (0x00007fc1152a0000)
    libpostproc.so.55 => /lib/x86_64-linux-gnu/libpostproc.so.55 (0x00007fc115270000)


  


  Are those the required dependencies ? It didn't list the files under bin, include or share folders.