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avidemux: check video stream framerate against avi header frame duration

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The former might be bogus in silly cases, and the latter seems to
carry more weight.
This commit is contained in:
Mark Nauwelaerts 2009-07-29 15:25:38 +02:00
parent 3863871100
commit f4f8e8532c
1 changed files with 18 additions and 1 deletions
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19
gst/avi/gstavidemux.c
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@ -1502,8 +1502,25 @@ gst_avi_demux_parse_stream (GstAviDemux * avi, GstBuffer * buf)
GST_WARNING_OBJECT (avi, "Failed to parse strh chunk");
goto fail;
}
/* determine duration as indicated by header */
strh = stream->strh;
/* sanity check; stream header frame rate matches global header
* frame duration */
if (stream->strh->type == GST_RIFF_FCC_vids) {
GstClockTime s_dur;
GstClockTime h_dur = avi->avih->us_frame * GST_USECOND;
s_dur = gst_util_uint64_scale (GST_SECOND, strh->scale, strh->rate);
GST_DEBUG_OBJECT (avi, "verifying stream framerate %d/%d, "
"frame duration = %d ms", strh->rate, strh->scale,
s_dur / GST_MSECOND);
if (h_dur > (10 * GST_MSECOND) && (s_dur > 10 * h_dur)) {
strh->rate = GST_SECOND / GST_USECOND;
strh->scale = h_dur / GST_USECOND;
GST_DEBUG_OBJECT (avi, "correcting stream framerate to %d/%d",
strh->rate, strh->scale);
}
}
/* determine duration as indicated by header */
stream->hdr_duration = gst_util_uint64_scale ((guint64) strh->length *
strh->scale, GST_SECOND, (guint64) strh->rate);
GST_INFO ("Stream duration according to header: %" GST_TIME_FORMAT,