I discovered a crash here if log handler function tries to get the class
name from "s"
mpeg12dec.c:
if (get_bits_left(&s->gb) < 0) {
av_log(s, AV_LOG_ERROR, "overread %d\n", -get_bits_left(&s->gb));
return AVERROR_INVALIDDATA;
}
And it seems to be because MpegEncContext->class is never initialized (or
rather it is initialized to 0) due to av_malloc_z() I assume.
So the question is, is it valid for any av object to have its av_class set
to 0.
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