Is there an MPEG2DEC YV12 that actually works?

Guest · 7th December 2002, 17:10

I've discovered that MarcFD's mpeg2dec3 (YV12 capable) delivers bad frames. This causes DecombYV12 to fail as it does not always receive correct fields to match. The same VOB works perfectly with the standard mpeg2dec.

Since it seems that mpeg2dec3 has become an orphan, I am wondering if there is either a working YV12-capable mpeg2dec, or any other reliable YV12-capable decoder.

Without a reliable YV12 decoder available, I will not release DecombYV12, because it will be unfairly blamed.

I will be happy to make available the proof of the mpeg2dec3 failure if anyone cares to see it.

Finally, since MarcFD's site is down, does anyone have the source for mpeg2dec3?

Thank you.

wotef · 7th December 2002, 17:17

does the bug also affect non-combed frames?

Guest · 7th December 2002, 17:23

They are progressive source frames that get delivered with one field wrong (displaced downward). I don't know how the RFF/TFFs are set for it in the VOB. It may be that the 3:2 pulldown is not being done correctly (DVD2AVI non-Force Film).

int 21h · 7th December 2002, 17:48

Quote:

Originally posted by neuron2
Finally, since MarcFD's site is down, does anyone have the source for mpeg2dec3?

Did we ever even get the source? I remember a big stink about it awhile back... It was when Tom wanted to verify or add the HDTV stream functionality.

scmccarthy · 7th December 2002, 18:14

@neuron2

Are you sure you have the newest version? Because I had problems with it too and now they have gone away.

Did anyone else have trouble stepping backwards through the video before? Once I installed MPEG2DEC3 v0.93, it worked fine. Does anyone know what was causing that problem?

Anyway, now would be a really great time for Marc to release the source code. He has done a good job of finding the initial bugs, but no one person can find all of them.

And even if there is no bug, it might help us to know what it is doing.

Stephen

mikeson · 7th December 2002, 18:29

@neuron2

I've got source code of MPEG2Dec3YV12 v0.93. Just tell me your e-mail address, I'll send it to you.

mikeson · 7th December 2002, 18:52

@neuron2

I've found your e-mail address on your homepage, so I've already send it to you.

If anybody else interested, just tell me...

Marc FD · 7th December 2002, 19:30

don, don't get mad ^^

1) i rewrote all the YV12 part to make it work correctly, but it's brand new (in v0.93) i can correct your bug in less than 10 minutes, just explain it.
2) i released the source 3 weeks ago, so please int21h, don't say such things

thx.

just ^__________^

marc

Guest · 7th December 2002, 19:48

Hi Marc,

Thank you. I'd appreciate it if you could have a look at the problem. The version of mpeg2dec3 I used is 0.93.

First get this VOB:

http://shelob.mordor.net/dgraft/bitch.vob

Then decode it with standard mpeg2dec (and Avisynth 2.06) and mpeg2dec3 and compare frame 2 from each. For me, mpeg2dec presents it correctly, and mpeg2dec3 mangles it. Following are my scripts:

mpeg2dec:

LoadPlugin("..\..\mpeg2dec.dll")
mpeg2source("bitch.d2v")

mpeg2dec3:

LoadPlugin("..\..\mpeg2dec3.dll")
mpeg2source("bitch.d2v")

Regarding source: with your web page down, the fact that you released it is...less than satisfying.

(Don't blame me for the clip; I got it from manono! I did choose the name though.

Anyway, it's just Cowboy Bebop.)

regards,
Don

scmccarthy · 7th December 2002, 19:50

Oops, MeaCulpa MarkFD,

I found the MPEG2DEC3 v 0.92 src on my hard drive now.

I guess you did release your code. The only real problem has been the site being down. I hope it is up now.

Stephen

Marc FD · 7th December 2002, 19:57

hmm don, 10 Mb for my 56k ?? maybe too much.

just explain the problem, i'm 90% sure i can reproduce it with my own vobs. BTW, when i rewrote the YV12 stuff i compared with MPEG2Dec to see if the options worked well, but it's very probable that there's something i ommited.

what's your problem ? swapped fields ?

EDIT : if i can't reproduce it i'll of course dl your vob, but i prefer to do that in last. i hope you understand.

Guest · 7th December 2002, 20:03

OK, attached here and the next post are the good and bad frames. It looks like you are not performing 3:2 pulldown correctly (possibly only at the beginning of the clip, but I am not sure about that yet).

Guest · 7th December 2002, 20:04

the second:

Guest · 7th December 2002, 20:08

BTW, this frame is from a run of many duplicates of this frame. Two out of five are wrong, which points to the 3:2 handling.

vinetu · 7th December 2002, 20:14

@neuron2:
You have a mail at "neuron2...attbi..." address !

Marc FD · 7th December 2002, 20:20

3:2 pulldown.. you used "force-film" ?? that'ld explain everything (because a lot of code for force-film is changed, btw my mmx transferts should speed up pulldown ^^)

i think i'll dl you vob and do it seriously tonight. i've just 2-3 things to finish in speed ^__^

Guest · 7th December 2002, 20:24

Marc,

Please read the thread carefully.

I used non-Force Film. When you do non-Force Film, the decoder has to obey the RFF/TFF flags and output the necessary pulled-down fields. That is my understanding. Am I wrong?

In any case, the output from the two is clearly different.

Guest · 7th December 2002, 20:37

Marc,

You rewrote mcsse.asm "in NASM". Since it won't build under VC++ 6.0 can you please provide the object file (it is not in the distribution)? Thank you.

Marc FD · 7th December 2002, 21:06

okay i'll give it to you, i just need to finish a lot of things (like dling your vob... 35 minutes !!)

Guest · 7th December 2002, 21:23

Thank you, Marc. I'm not planning to do anything with it if you are still maintaining it, but it would still be good to have some source that I can build for experimenting.

Take your time, Sir.

7th December 2002, 17:10	#1 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	Is there an MPEG2DEC YV12 that actually works? I've discovered that MarcFD's mpeg2dec3 (YV12 capable) delivers bad frames. This causes DecombYV12 to fail as it does not always receive correct fields to match. The same VOB works perfectly with the standard mpeg2dec. Since it seems that mpeg2dec3 has become an orphan, I am wondering if there is either a working YV12-capable mpeg2dec, or any other reliable YV12-capable decoder. Without a reliable YV12 decoder available, I will not release DecombYV12, because it will be unfairly blamed. I will be happy to make available the proof of the mpeg2dec3 failure if anyone cares to see it. Finally, since MarcFD's site is down, does anyone have the source for mpeg2dec3? Thank you. Last edited by Guest; 7th December 2002 at 17:24.

7th December 2002, 17:23	#3 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	They are progressive source frames that get delivered with one field wrong (displaced downward). I don't know how the RFF/TFFs are set for it in the VOB. It may be that the 3:2 pulldown is not being done correctly (DVD2AVI non-Force Film). Last edited by Guest; 7th December 2002 at 17:26.

7th December 2002, 18:29	#6 \| Link
mikeson Registered User Join Date: Dec 2001 Location: Czech Republic Posts: 261	@neuron2 I've got source code of MPEG2Dec3YV12 v0.93. Just tell me your e-mail address, I'll send it to you. __________________ mikeson

7th December 2002, 18:52	#7 \| Link
mikeson Registered User Join Date: Dec 2001 Location: Czech Republic Posts: 261	@neuron2 I've found your e-mail address on your homepage, so I've already send it to you. If anybody else interested, just tell me... __________________ mikeson

7th December 2002, 19:48	#9 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	Hi Marc, Thank you. I'd appreciate it if you could have a look at the problem. The version of mpeg2dec3 I used is 0.93. First get this VOB: http://shelob.mordor.net/dgraft/bitch.vob Then decode it with standard mpeg2dec (and Avisynth 2.06) and mpeg2dec3 and compare frame 2 from each. For me, mpeg2dec presents it correctly, and mpeg2dec3 mangles it. Following are my scripts: mpeg2dec: LoadPlugin("..\..\mpeg2dec.dll") mpeg2source("bitch.d2v") mpeg2dec3: LoadPlugin("..\..\mpeg2dec3.dll") mpeg2source("bitch.d2v") Regarding source: with your web page down, the fact that you released it is...less than satisfying. (Don't blame me for the clip; I got it from manono! I did choose the name though. Anyway, it's just Cowboy Bebop.) regards, Don Last edited by Guest; 7th December 2002 at 19:57.

7th December 2002, 17:17	#2 \| Link
wotef Registered User Join Date: Apr 2002 Posts: 272	does the bug also affect non-combed frames?

7th December 2002, 18:14	#5 \| Link
scmccarthy Registered User Join Date: Oct 2002 Posts: 462	@neuron2 Are you sure you have the newest version? Because I had problems with it too and now they have gone away. Did anyone else have trouble stepping backwards through the video before? Once I installed MPEG2DEC3 v0.93, it worked fine. Does anyone know what was causing that problem? Anyway, now would be a really great time for Marc to release the source code. He has done a good job of finding the initial bugs, but no one person can find all of them. And even if there is no bug, it might help us to know what it is doing. Stephen

7th December 2002, 19:30	#8 \| Link
Marc FD XviD fan Join Date: Jun 2002 Location: France Posts: 907	don, don't get mad ^^ 1) i rewrote all the YV12 part to make it work correctly, but it's brand new (in v0.93) i can correct your bug in less than 10 minutes, just explain it. 2) i released the source 3 weeks ago, so please int21h, don't say such things thx. just ^__________^ marc

7th December 2002, 19:50	#10 \| Link
scmccarthy Registered User Join Date: Oct 2002 Posts: 462	Oops, MeaCulpa MarkFD, I found the MPEG2DEC3 v 0.92 src on my hard drive now. I guess you did release your code. The only real problem has been the site being down. I hope it is up now. Stephen

7th December 2002, 19:57	#11 \| Link
Marc FD XviD fan Join Date: Jun 2002 Location: France Posts: 907	hmm don, 10 Mb for my 56k ?? maybe too much. just explain the problem, i'm 90% sure i can reproduce it with my own vobs. BTW, when i rewrote the YV12 stuff i compared with MPEG2Dec to see if the options worked well, but it's very probable that there's something i ommited. what's your problem ? swapped fields ? EDIT : if i can't reproduce it i'll of course dl your vob, but i prefer to do that in last. i hope you understand. Last edited by Marc FD; 7th December 2002 at 19:59.

7th December 2002, 20:03	#12 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	OK, attached here and the next post are the good and bad frames. It looks like you are not performing 3:2 pulldown correctly (possibly only at the beginning of the clip, but I am not sure about that yet).

7th December 2002, 20:04	#13 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	the second:

7th December 2002, 20:08	#14 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	BTW, this frame is from a run of many duplicates of this frame. Two out of five are wrong, which points to the 3:2 handling.

7th December 2002, 20:14	#15 \| Link
vinetu Registered User Join Date: Oct 2001 Posts: 195	@neuron2: You have a mail at "neuron2...attbi..." address !

7th December 2002, 20:20	#16 \| Link
Marc FD XviD fan Join Date: Jun 2002 Location: France Posts: 907	3:2 pulldown.. you used "force-film" ?? that'ld explain everything (because a lot of code for force-film is changed, btw my mmx transferts should speed up pulldown ^^) i think i'll dl you vob and do it seriously tonight. i've just 2-3 things to finish in speed ^__^

7th December 2002, 20:24	#17 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	Marc, Please read the thread carefully. I used non-Force Film. When you do non-Force Film, the decoder has to obey the RFF/TFF flags and output the necessary pulled-down fields. That is my understanding. Am I wrong? In any case, the output from the two is clearly different.

7th December 2002, 20:37	#18 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	Marc, You rewrote mcsse.asm "in NASM". Since it won't build under VC++ 6.0 can you please provide the object file (it is not in the distribution)? Thank you.

7th December 2002, 21:06	#19 \| Link
Marc FD XviD fan Join Date: Jun 2002 Location: France Posts: 907	okay i'll give it to you, i just need to finish a lot of things (like dling your vob... 35 minutes !!)

7th December 2002, 21:23	#20 \| Link
Guest Guest Join Date: Jan 2002 Posts: 21,901	Thank you, Marc. I'm not planning to do anything with it if you are still maintaining it, but it would still be good to have some source that I can build for experimenting. Take your time, Sir.