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mpegvideoparser: Fix the pixel-aspect-ratio calculation

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Ignore the display_extension values if they are greater than the width/height
values provided by seqhdr and calculate the PAR based on the seqhdr values.T
his is what DVD players are doing.

Thanks to "David Schleef <ds@schleef.org>"

https://bugzilla.gnome.org/show_bug.cgi?id=685103
This commit is contained in:
Sreerenj Balachandran 2013-06-05 16:16:36 +03:00 committed by Sebastian Dröge
parent bdb4de3a6d
commit 0a496f4167
1 changed files with 8 additions and 3 deletions
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11
gst-libs/gst/codecparsers/gstmpegvideoparser.c
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@ -492,9 +492,14 @@ gst_mpeg_video_finalise_mpeg2_sequence_header (GstMpegVideoSequenceHdr * seqhdr,
w = seqhdr->width;
h = seqhdr->height;
if (displayext) {
/* Use the display size for calculating PAR when display ext present */
w = displayext->display_horizontal_size;
h = displayext->display_vertical_size;
/* Use the display size for calculating PAR when display ext present.
* But we are handling this like what DVD players are doing. Which means,
* ignore the display extension values if they are greater than the width/height
* values provided by seqhdr and calculate the PAR based on the seqhdr values. */
if (displayext->display_horizontal_size < w)
w = displayext->display_horizontal_size;
if (displayext->display_vertical_size < h)
h = displayext->display_vertical_size;
}
/* Pixel_width = DAR_width * display_vertical_size */