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• How to split multiple videos 2.24 seconds before the end

  15 décembre 2019, par Leendert

  I have a folder with 100 videos, I need to split all videos into 2, the split needs to happen 2 seconds before the end of every video.

  I want to keep both parts of the video after the split.

  So far I have the code below, this will trim 2 seconds from the end of every video that is in de same folder as the .bat file.
  It will put the new videos inside of a folder called ’new files’.
  The problem is that the length of the video is not trimmed. Only audio and video. So the last 2 seconds will just be the last frame and no audio.

  for %%a in ("*.mp4") do ffmpeg -i "%%a" -filter_complex "[0]trim=2,setpts=PTS-STARTPTS[b];[b][0]overlay=shortest=1" -shortest -c:a copy "newfiles\%%~na.mp4" pause 

• Best way to split multi channel audio file in Swift [on hold]

  8 mars 2016, par amkaufman

  I’m currently working on an iOS project in which I need to be able to split a multi-channel .AAC file. I’m still fairly new to iOS development and Swift and am not sure if the frameworks that I have seen will be able to do this.

  So far I have looked into AVFoundation and FFmpeg, but I’m still not sure if they would be able to do this.

  After looking into AudioKit’s documentation I am still a bit lost on how to actually split the file into its separate channels. Where exactly should I be looking ?

• Split a movie so that each GIF is under a certain file size

  9 novembre 2014, par Terence Eden

  Problem

  I want to convert a long movie into a series on animated GIFs.

  Each GIF needs to be <5MB.

  Is there any way to determine how large a GIF will be while it is being encoded ?

  Progress So Far

  I can split the movie into individual frames :

  ffmpeg -i movie.ogv -r 25 frameTemp.%05d.gif

  I can then use convert from ImageMagick to create GIFs. However, I can’t find a way to determine the likely file size before running the command.

  Alternatively, I can split the movie into chunks :

  ffmpeg -i movie.ogv -vcodec copy -ss 00:00:00 -t 00:20:00 output1.ogv

  But I’ve no way of knowing if, when I convert the file to a GIF it will be under 5MB.

  A 10 second scene with a lot of action may be over 5MB (bad !) and a static scene could be under 5MB (not a problem, but not very efficient).

  Ideas

  I think that what I want to do is convert the entire movie into a GIF, then find a way to split it by file size.

  Looking at ImageMagick, I can split a GIF into frames, but I don’t see a way to split it into animated GIFs of a certain size / length.

  So, is this possible ?