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avidemux: additional verification heuristics for VBR audio stream

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Check for and override some header field(s) for reasonable values, according
to later expected use in calculations.
This commit is contained in:
Mark Nauwelaerts 2010-07-07 14:16:59 +02:00
parent d5a4da9a69
commit 7955c01f19
1 changed files with 13 additions and 0 deletions
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13
gst/avi/gstavidemux.c
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@ -2005,6 +2005,19 @@ gst_avi_demux_parse_stream (GstAviDemux * avi, GstBuffer * buf)
"invalid audio header, ignoring stream");
goto fail;
}
/* some more sanity checks */
if (stream->is_vbr) {
if (stream->strf.auds->blockalign <= 4) {
/* that would mean (too) many frames per chunk,
* so not likely set as expected */
GST_DEBUG_OBJECT (element,
"suspicious blockalign %d for VBR audio; "
"overriding to 1 frame per chunk",
stream->strf.auds->blockalign);
/* this should top any likely value */
stream->strf.auds->blockalign = (1 << 12);
}
}
break;
case GST_RIFF_FCC_iavs:
stream->is_vbr = TRUE;