[FFmpeg-devel] [PATCH] add check to see if 4xm track is initialized (issue 2527)

[Daniel Kang]

ffmpeg does not check if tracks in 4xm files are initialized before
attempting to decode them. For invalid headers, ffmpeg will initialize a
certain track, but attempt to decode another. In addition, ffmpeg does
not check for an invalid number of tracks (i.e. negative). The patch
attached adds checks for this.
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