[FFmpeg-devel] [RFC] Videos that change colorspace

Jason Garrett-Glaser darkshikari
Thu Jun 18 03:53:39 CEST 2009

Some quite popular camera is producing MJPEG videos that change
colorspace: the first frame is YUVJ422P and all frames afterwards are

This crashes ffmpeg (since swscale doesn't get re-initted after the
video finding a new colorspace, and attempts to resample chroma that
doesn't exist).  It creates rather funky video in Virtualdub as well,
but works perfectly in FFDshow+MPC on Windows.

The relevant ticket can be found here:

To give you an idea of how widespread this issue is, Facebook receives
(my estimate based on grepping the logs) around one thousand of these
files a day.

How should we deal with this issue?

Dark Shikari

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