I have a directory of 100 mp4 files. All are working well on my ipad but most of them do not have a working thumb.

I want to generate these thumbs with a command line command (on macosx) based on a frame of the movies (at second 30 for example).

Thank you in advance

  • What's the difference between the videos that do have a "working thumb" and ones that do not?
    – llogan
    Feb 17, 2014 at 18:43
  • I dont have any idea. It is very weird because i dont have the same results in OSX.
    – Sucrenoir
    Feb 18, 2014 at 7:41
  • Do you see any differences within the ffmpeg console output? ffmpeg -i works.mp4 -i notwork.mp4?
    – llogan
    Feb 18, 2014 at 18:23
  • Is this in the iPad's native Videos app?
    – Duvrai
    Feb 18, 2014 at 23:11
  • This is how it looks in Finder dl.dropboxusercontent.com/s/cb653aicns4xtql/…
    – Sucrenoir
    Feb 19, 2014 at 8:58


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