[FFmpeg-devel] [PATCH] PGS subtitle blanking and positioning

[Mark Goodman]

The attached patch makes subtitles blank instead of merely timing out
and parses previously ignored position information. I noticed some
subtitles positioned outside a 2.35:1 aspect ratio video. In the
packet dump, a few presentation segments had 0x40 for the block byte.
I tested this patch with MythTV trunk.
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