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• FFmpeg-split.py can't determine video length

  13 juin 2017, par Almog Woldenberg

  First, I’m not a developer. I’m trying to split a movie into 1 minute clips usinf ffmpeg-split.py python script. I made sure FFmpeg is installed it trying a simple command and it worked like magic :

  ffmpeg -i soccer.mp4 -ss 00:00:00 -codec copy -t 10 soccer1.mp4

  A new video file was created in the same folder.

  I saved the FFmpeg-split.py in the same dir, updated python PATH and typed the following command :

  python ffmpeg-split.py -f soccer.mp4 -s 10

  what I got back was :

  can't determine video length

  I believe it just can’t find the file. I switched video files and even deleted it and got the same message.

  Any ideas ?

• Is there a Heroku-supported method for getting the length of an audio file in seconds ?

  12 juillet 2013, par Ben West

  I'm trying to implement

  http://blog.firmhouse.com/validate-length-of-an-audio-file-when-using-paperclip-and-s3

  But I'm unsure what gem provided FFMpegWrapper, and I'd like to use Heroku to deploy my app for testing. Does heroku support something that will work for this ?

  full Rails Application source :

  https://github.com/mrgenixus/sound-byte

  Relevant Model :

  https://github.com/mrgenixus/sound-byte/blob/master/app/models/episode.rb

• How to create bash script with ffmpeg to flip a dir of vids 180, then stitch together without losing vid length

  25 septembre 2022, par Maude Rozencrance's Cat

  I'm trying to make a bash script in linux to flip a bunch of AVI files 180 degrees, then stitch them together without losing the length of the vids. My code works, but it truncates each vid and makes 60 10sec vids, which should be 600 seconds of video, down to about 11 seconds.

  


  I removed the transpose to flip the vids and now I'm getting the correct vid length. So it works, but I have to flip the vid in the video player.

  


  >videos.txt

files=DSCF*.AVI

for f in $files
do
    #make list of vids, copy to videos.txt
    echo "file '$f'" >> videos.txt;
    echo "duration 10.0" >> videos.txt;
    
done

#stitch all vids together
ffmpeg -f concat -safe 0 -i videos.txt -c copy bigvid.AVI