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ffmpeg: VC-1/WMV3 fixes.

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Use format field in the pad caps to differentiate VC-1 from WMV3.
Fix a typo in the caps creation and parsing - the field is called
'format' - not 'fourcc'

Add a dodgy hack to populate the extradata size field
(first byte) when it is 0 - as it seems to be for some (Matroska)
test files.
This commit is contained in:
Jan Schmidt 2009-10-01 02:48:35 +01:00
parent 19e81024a3
commit 62d54db07d
1 changed files with 15 additions and 6 deletions
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21
ext/ffmpeg/gstffmpegcodecmap.c
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@ -965,11 +965,12 @@ gst_ffmpeg_codecid_to_caps (enum CodecID codec_id,
case CODEC_ID_WMV3:
caps = gst_ff_vid_caps_new (context, codec_id, "video/x-wmv",
"wmvversion", G_TYPE_INT, 3, NULL);
"wmvversion", G_TYPE_INT, 3, "format", GST_TYPE_FOURCC,
GST_MAKE_FOURCC ('W', 'M', 'V', '3'), NULL);
break;
case CODEC_ID_VC1:
caps = gst_ff_vid_caps_new (context, codec_id, "video/x-wmv",
"wmvversion", G_TYPE_INT, 3, "fourcc", GST_TYPE_FOURCC,
"wmvversion", G_TYPE_INT, 3, "format", GST_TYPE_FOURCC,
GST_MAKE_FOURCC ('W', 'V', 'C', '1'), NULL);
break;
case CODEC_ID_QDM2:
@ -2156,6 +2157,11 @@ gst_ffmpeg_caps_with_codecid (enum CodecID codec_id,
context->extradata_size = size;
}
/* Hack for VC1. Sometimes the first (length) byte is 0 for some files */
if (codec_id == CODEC_ID_VC1 && size > 0 && data[0] == 0) {
context->extradata[0] = (guint8) size;
}
GST_DEBUG ("have codec data of size %d", size);
} else if (context->extradata == NULL) {
/* no extradata, alloc dummy with 0 sized, some codecs insist on reading
@ -2716,12 +2722,15 @@ gst_ffmpeg_caps_to_codecid (const GstCaps * caps, AVCodecContext * context)
{
guint32 fourcc;
if (gst_structure_get_fourcc (structure, "fourcc", &fourcc)) {
/* WMV3 unless the fourcc exists and says otherwise */
id = CODEC_ID_WMV3;
if (gst_structure_get_fourcc (structure, "format", &fourcc)) {
if ((fourcc == GST_MAKE_FOURCC ('W', 'V', 'C', '1')) ||
(fourcc == GST_MAKE_FOURCC ('W', 'M', 'V', 'A')))
(fourcc == GST_MAKE_FOURCC ('W', 'M', 'V', 'A'))) {
id = CODEC_ID_VC1;
} else
id = CODEC_ID_WMV3;
}
}
}
break;
}