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Why can't QT Player play this AVI?

Macintoshian Achaia - Ars Technica OpenForum - arstechnica.com
I have a MicroSeven security camera that saves video as AVI files, such as this magnificent example of USPS customer service. VLC can play the videos, and reports them as "H264 - MPEG-4 AVC (part 10)(H264)":

But why won't QuickTime Player play them? I even have the old QT Player 7, and it won't play them either. I have to use VLC on my Mac.

If I run this video through:

Quote:ffmpeg -i originalfile.avi outputfile.mp4

I can then play the resulting fill-in both QT Player and VLC, and VLC reports the new file as "H264 - MPEG-4 AVC (part 10)(avc1)":

Is that last parenthetical the important part?

BTW if you just want to see the video without downloading and opening in VLC, . YouTube transcoded it just fine.
Date: Jan 24, 2017   


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