VDPAU subpicture scaled incorrectly

[tim@…]

Head revision 20658

When playing a 4:3 ratio DVD (or .mkv with DVD subpicture subtitles) on a 16:9 ratio TV using VDPAU, the picture is displayed correctly, but the subtitles appear scaled to the full width of the 16:9 screen. This can be readily seen with wider subtitle text where it overlaps the edge of the picture.

This is not normally a problem for soundtrack subtitles (hence the low severity), where the text is merely a little ugly. It can however cause irritation when the subpicture has been used to position translations for in-picture text (e.g. Japanese/Chinese characters on signs), as these then appear in the wrong place and obscuring things they were not intended to obscure.

The problem does not seem to affect normal Xv (non-VDPAU) rendering where the subtitles are scaled correctly.

[tim@…]

I wonder what words I can remove to avoid this being flagged as spam...

I've just tried this with a couple more DVDs and it seems fine, but when I make a mkv out of a title on one it still shows the problem, so maybe it's just mkv files or similar

The DVD I originally saw the problem with is lent out to someone so I can't check that one right now.

[markk]

I've tested VDPAU playback with a pretty wide selection of DVDs over the last few weeks and months (with different systems and displays) and cannot reproduce this issue. I can't comment on mkv files.

If there is still a problem, please raise again.