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• Moviepy replays audio at the end for half a second

  31 mai 2023, par Zac Jokface

  I used moviepy to add audio to a given video.
I started by checking the duration of the video. If it's shorter than the audio, I slow the video down using :

  


  video_clip = video_clip.fx( vfx.speedx, (video_clip.duration/audio_clip.duration))

  


  Then, I added the audio using :

  


  video_clip = video_clip.set_audio(audio_clip)

  


  I saved the result with

  


  video_clip.write_videofile(save_path, codec="libx264", audio_codec="aac", fps=24, audio_bitrate="64K", threads=32, ffmpeg_params=['-safe', '0'])

  


  Everything seems to be OK, except for the last half second of the resulting video, where the audio is replayed right before the end of the video.
I tried

  


  new_audio_clip = afx.audio_loop(audio_clip, duration=video_clip.duration)

  


  And added the new audio instead. But nothing changed.

  


• Cut every .mp4 in folder by half with ffmpeg

  14 novembre 2022, par c00kieRaptor

  I have a folder with 200 mp4-files and I need to cut the last half of every one of them. So if a video is 140 seconds I need to cut out the last 70 seconds so that the resulting output is the preceding 70 seconds.

  


  I would assume the loop would look a bit like this :

  


  for i in *.mp4; do
    let A=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $i)
    let A=${A%.*}
    let A=$A/2
    ffmpeg -sseof $A -i $i ${i%.mp4}
done


  


  But I get "syntax error : invalid arithmetic operator (error token is ".246848")" from the first 'let'. This corresponds to the float of the video duration.
For all I know there could be many other mistakes with my loop

  


  Also some files have spaces and special characters if that matters.

  


• avutil : move half-precision float helper to avutil

  9 août 2022, par Timo Rothenpieler

  avutil : move half-precision float helper to avutil
  

  • [DH] libavcodec/exr.c
  • [DH] libavcodec/exrenc.c
  • [DH] libavcodec/float2half.h
  • [DH] libavcodec/half2float.h
  • [DH] libavcodec/pnmdec.c
  • [DH] libavcodec/pnmenc.c
  • [DH] libavutil/float2half.h
  • [DH] libavutil/half2float.h