Jumpy XviD???

[kitanai]

Hi,

I have a Matrox G450 DH which has an excellent TV output, using its DVDmax feature, which outputs any DirectDraw directly on screen.

I have been watching quite a few DivX and Xvid lately. But now, I came across a whole bunch XviDs, which play REALLY jumpy on PAL TV. Ok, the have only 23,97f/s, but so had the files which played great. :confused:

It seems, on TV the "jumpyness" is more obvious than on PC, but it is with both! Anyway, the problem is: I got quite a few XviDs which playback jumpy with either DivX and XviD decoder.

Is there any way to correct the stream or will only a new encoding of the source material solve this?

[Mentalmummy]

23.976 framerate avi`s do play jerky on Pal systems but quite often you won`t notice it as much because it is more obvious on certain types of camera movement than on others so something like "the usual suspects" for instance might look a lot smoother than "the matrix reloaded".

But if it is just the Xvids causing the problem it could well be the decoder. Do you have one decoder (Divx?) playing back both Xvid and DivX? If so maybe try a seperate divx and xvid decoder or something like ffdshow.

Some of the experts can probably correct me on this if I`m wrong but Xvid has some features which divx cannot replicate very well (I think GMC is handled very differently) and it could just be as easy as trying a new decoder.

[kitanai]

No, XviD decoder is used for XviD, DivX decoder for DivX. Both play the XviD files jerky - but also on PC!!!

Forcing DivX to decode those XviD files does not change a single thing. It should not be caused by my hard-/software, since other files play great just like that - even with 23,97f/s. It must be something else.

I tell you: I just don't know, why some people just cannot stick to the encoder's default settings if they don't know what they are doing. Maybe those setting won't squeeze out the last possible bit but at least they play correctly :mad:

[Mentalmummy]

Only thing that I can suggest is the following threads

http://forum.doom9.org/showthread.php?s=&threadid=71444&highlight=jerky

http://forum.doom9.org/showthread.php?s=&threadid=70582&highlight=jerky

http://forum.doom9.org/showthread.php?s=&threadid=48478&highlight=jerky

and

http://forum.doom9.org/showthread.php?s=&threadid=26381&highlight=jerky

They seem to cover all possible causes and solutions :)

[kitanai]

I' so sorry. It's so late already. Ok this is the thing:

Of course you were right. The files in 23,97f/s play jerky in PAL TV. The other are 25f/s. Since on TV output, overlay on the PC screen is directly connected to the TV output, it gets jerky, too. Sorry, my fault.

But the main problem remain (however this might not be the correct forum...): how to play an 23,97f/s-(NTSC-based)-file on a PAL TV smoothly?

Is there an way to manipulate, for example, Media Player Classics directDraw output, so it has 25fps???

[kitanai]

Google saves us all :p

BSPlayer can increase playback rate in steps of 1%. Thus, 23,97 x 1,04 = 24,93. It is not a very clean solution, but it works for now.

However, if other people have the same NTSC-PAL problem, I would be happy the get some comments on that.

@Admin: maybe this threat should be moved to the appropriate forum....

[Koepi]

Reclock Dshow (-> search) could help you there without increasing playback speed AFAIK.

[kitanai]

Well, that did the trick! :D Thank you very much.

Actually, it does increase playback speed, but which is acceptable:Readme file from http://reclock.free.fr
Changing the playback speed can be noticeable on sound especially when 23.976 fps material is up rated to 25 fps. Doing so will accelerate the sound by 4%, and sound will seem to be a little high pitched. If you don’t like that, you can enable the “audio time stretching” function

[TPoise]

It could be the AC3 sound. I know on a lot of XViDs with really high quality sound it takes extra CPU cycles to decode this higher bitrate for the sound, sometimes causing jumpyness.