VLC 0.72 and subtitles = 100 % CPU usage

Sigmund · Postby **Sigmund** » 02 Jul 2004 15:14

I've spent most of this morning investigating this. It seems I can reproduce it, but only in overlay mode on windows. Same box, same clip on linux does not have this problem. Can any of you who have this problem tell me what video cards you have? I have a ati mobility radeon 7500

Sigmund · Postby **Sigmund** » 02 Jul 2004 15:29

Ok, we've tracked down the problem, but haven't solved it yet

Frater Kork · Postby **Frater Kork** » 02 Jul 2004 18:24

Far Out!

What was the problem?

(ed) I have an old NVidia GeForce FX 5200

Sigmund · Postby **Sigmund** » 02 Jul 2004 19:21

Problem was that the subtitle is alpha-blended with the video, and this requires reading from the video frame which was located in videocard memory. And this memory is horribly slow to read from. Our best buddy gibalou has allready fixed the issue so if you could test the next nightly build it would be awsome

Frater Kork · Postby **Frater Kork** » 03 Jul 2004 16:28

That did it!

Subs run fine now without impacting CPU whatsoever

Thanks Sigmund and Gibalou!

Guest · Postby **Guest** » 03 Jul 2004 20:43

The subtitle CPU pegging bug does indeed appear to be fixed in the most recent nightly build. Great work!

maxxxp · Postby **maxxxp** » 05 Jul 2004 13:41

Where can i find this build of vlc?
There's a compilated version?

Gibalou · Postby **Gibalou** » 05 Jul 2004 13:54

Nightly builds are available here:
http://www.videolan.org/~videolan/build/

As these development builds are automated, they are not tested so no guaranty they will work.

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VLC 0.72 and subtitles = 100 % CPU usage

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