Recherche avancée

Sur d’autres sites (7509)

• How can I use ffmpeg to split videos into 3 minute chunks ?

  29 janvier 2023, par TheBryan

  i want to split a video that is 21 minutes long into 7 videos of 3 minutes long using ffmpeg in cmd windows. The command I'm using is this but it gives me an error.
for /L %i in (0,1,7) do ffmpeg -i test.mp4 -ss 00 :$(%i*3):00 -t 00:03:00 -c copy outputs%i.mp4
If someone could tell me the error and how to fix it I would appreciate it.

  


  that the video is trimmed consecutively

  


• ffmpeg encoding outputs a file with incorrect metadata

  20 juillet 2013, par user2554615

  I use ffmpeg to convert a flv file to an mp3 file like so in bash :

  ffmpeg -i path/to/file.flv path/to/output.mp3

  say the flv is 5 minutes long, the output file is supposedly say, 3 minutes long. however when played back it will reach the 3 minute mark and keep playing (as it should) the full length. when i try to skip to a portion of the song it only skips by fractions of the time it should, take for example if the video is labeled as 3 minutes long and i skip to the end, it will actually be playing the area that is about 30 seconds in. why is it doing this and how do i fix it ? is there any other utility that i can use that will effectively convert .flv and .mp4 files to .mp3 or .wav in a loss-less fashion while maintaining the correct metadata, preferably for windows ? perhaps an API i can use in java or c++ ?

  PS : i ask here because it relates to a command line utility and i assume that the the solution will relate to the options used in the command.

  PPS : i am using the ffmpeg that comes with puppy linux (precise) 5.4

• ffmpeg not splitting into EXACT same length chunks

  4 octobre 2018, par jupiar

  I am trying to use ffmpeg to split a long video into exactly 20second long clips, and accomplishing that by :
  inside docker as a python sub-process

  subprocess.run(["/usr/sbin/ffmpeg",
  
          "-i", video_loc,
  
          "-async", "1",
  
          "-map", "0",
  
          "-segment_time", "20",
  
          "-f", "segment", 
  
          "-reset_timestamps", "1",
  
          "n-%05d.mp4"], cwd=r'/clips')

  My problem is that each are roughly 20seconds, some are as low as 10seconds, some as high as 27 seconds, i would say most are around 16-23. Is there something else that I can do to ensure the split of exactly 20 seconds ? I am open to any technique possible, aside from anything manual...