[FFmpeg-user] Concat Dropping Video

Carl Eugen Hoyos ceffmpeg at gmail.com
Wed Oct 17 19:36:21 EEST 2018

2018-10-04 5:50 GMT+02:00, VP Lists <lists at viaduct-productions.com>:
> Hi folks.  I’ve created a list of small clips in random order, each with a
> unique filename.  This file is used for a concat input file.
> In the verbose processing, I get lots of these after a few of the first
> files are processed:
> Error while decoding stream #0:0: Invalid data found when processing input
> [h264 @ 0x7fe65c062800] Invalid NAL unit 1, skipping.
> [h264 @ 0x7fe65c062800] no frame!

Please understand that using external resources for the console
output is neither useful nor welcome (and above extract tells us

I have to guess but the input files are likely not compatible / have
different properties which makes them unsuitable for the concat

Feel free to provide samples, Carl Eugen

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