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I have a bunch of videos created with a 10 second intro in the front of each of them. They are all MP4 and basically I want to trim the first 10 seconds off each video. Is there a piece of software that lets me do this as a mass. That is without having to click through each one.

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You can use FFmpeg:

  • Free and open-source
  • Runs on Windows
  • Allows to trim: e.g. to cut the first 2 seconds: ffmpeg -ss 2 -i input.flv -vcodec copy -acodec copy output.flv
  • Is CLI so you can batch.
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    I'm using this code to batch them: for %%a in ("*.*") do ffmpeg -ss 10 -i "%%a" -vcodec copy -acodec copy "newfiles\%%~na.mp4"and then a new line: pause
    – keji
    Commented Apr 8, 2014 at 4:59
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You can use Mencoder (part of MPlayer HQ):

  • Free and open-source
  • Runs on Windows
  • Allows to trim: e.g. to cut the first 2 seconds: mencoder.exe -ss 2 -oac copy -ovc copy input.flv -o output.flv (Mencoder uses FFmpeg, hence the similar syntax)
  • Is CLI so you can batch.
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You can use Avidemux:

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