Anamorphic encoding in matroska 720 x 432 with AAC 5.1

[Animaniac]

Originally posted by gabest
To me is slows down and skips a lot of frames at one point at the beginning if decoded with ffdshow.

Same here. That may be due to the use of GMC during encoding.

[ChristianHJW]

Originally posted by Animaniac
Same here. That may be due to the use of GMC during encoding.

GMC was not used. Unless VHQ4 uses it, and i dont know, XviD nOOOb as i am ;)

[ChristianHJW]

Originally posted by Lobuz @ChristianHJW
Did You use the latest XviD codec?

My build is a comparably stable development build ( lol ) from koepi, dated 5th April.

Could you investigate it and try to find the source of this strange spots. I mean, if it's there with standard options too? So we could bother ffdshow or XviD developers. Regards Lobuz

I never saw any grey spots on my system sorry, so its hard to investigate what might be wrong. One explanation i have is that i was using the 'packed bitstream' option, which is reported to be broken. Reason for this is that i plan to convert the movie to a 'native' MPEG4 matroska file later, and we will support packed bitstream earlier than dx50 VOP mode it seems. Could this be the reason ? Or maybe the 5-b frames i was setting at max allowed ?

[Lobuz]

I reproduced that stuttering bug. And looks like it's cause "packed bitstream" option ( I think it's not recommended ).

Because I couldn't demux it I loaded it into VirtualDub with Avisynth - DirectShowSource function. Decoded with xvid yv12 no postprocessing.

But it was works only with CoreCodec MatroskaDemuxer. With Gabest's Matroska Splitter there was runtime error(tryied 1004, 1002, 1001 versions ).

I couldn't reproduce that gray spots bug.

Edit:
Added:
That Runtime error appeared while I was trying to play it in MPC. But file loaded into VDub with infinite number of frames and couldn't stop while compressing.


Regards
Lobuz

[Lobuz]

So, finally I found the cause of these gray spots. It's because of combination of qpel + B-frames + packed bitstream. If it's together ffdshow(libav) can't decode it proprly. So the solution is to not use packed bitstream, or use much slower XviD decoder.

Regards
Lobuz

[Assault]

I tried the Star Wars sample with ffdshow-20030523.exe and the latest version of Gabest's MatroskaSplitter but the picture doesn't get resized in any player. Do I have to install anything else or isn't ffdshow-20030523.exe the latest version? Did I forget to activate anything in ffdshow?
I have an Athlon 1,2 Ghz, 256 mb RAM and a Geforce 4. My OS is WinXP, no SP.

Assault

[virux]

@Assault
enable overlay mixer, i had the same problem before

[ChristianHJW]

Originally posted by Lobuz But file loaded into VDub with infinite number of frames and couldn't stop while compressing.
Lobuz
You cant load the file in VdubMod, it doesnt know how to handle the AAC audio stream ...

EDIT :

I was pointing Cyrius to this thread, and it seems he will have a little surprise for us matroska guys for the next VdubMod release :D :D !!

[Assault]

OK, enabling overlay mixer solved the problem. :D
Thanks virux :)

Assault

[Lobuz]

Originally posted by ChristianHJW
You cant load the file in VdubMod, it doesnt know how to handle the AAC audio stream ...

I loaded it with avisynth and DirectShowSource(), so it used directshow decoder. With MatroskaSplitter it was somehow buggy but with MatroskaDemuxer it was OK. So I could reencode it and reproduce that bug.

Regards
Lobuz