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• avcodec/qpeg : speed-up copy of bytes

  31 août 2020, par Paul B Mahol

  avcodec/qpeg : speed-up copy of bytes
  

  • [DH] libavcodec/qpeg.c

• How to speed up sound and video and modify the pitch ?

  3 août 2020, par DiREKT

  I want to increase speed on both the sound and the video, while adding pitch to the audio alone.

  


  I have those two ffmpeg commands, but I don't know how to make them work together.

  


  ffmpeg -i input.mkv -filter_complex "[0:v]setpts=0.94*PTS[v];[0:a]atempo=1.06[a]" -map "[v]" -map "[a]" output.mkv


  


  and

  


  ffmpeg -i input.mkv -filter:a "atempo=1.06,asetrate=44100*1.25" output.mkv


  


• FFmpeg make video from figures and speed up a chosen part

  11 juin 2020, par user13720066

  Make a video from a series of 100 figures

  



  ffmpeg -framerate 10 -i input_figure%01d.png out.mp4


  



  How can I only make figure numbers from [0-49] with a slower speed like -framerate 5 ?

  



  My try is

  



  ffmpeg -start_number 1 -framerate 5 -i input_figure%01d.png -vframes 49 \
-start_number 50 -framerate 10 -i input_figure%01d.png \
out.mp4 


  



  Doesn't work