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Old 5th July 2005, 13:03   #281  |  Link
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@fccHandler

I considered something like your solution but I was worried by emulated codes in the junk content and I thought it was not worth the effort. Maybe I'll rethink that if your solution doesn't run into any problems.

Thank you for the new version of VirtualDub MPEG2. I see you have RFF handling now. Cool. Can we hope for "force film" and multiple source file support in a future version? Force film would be desirable because one doesn't have the ability to invoke external Avisynth IVTC filters.

Last edited by Guest; 5th July 2005 at 13:14.
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Old 6th July 2005, 03:46   #282  |  Link
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Thanks!
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Old 10th July 2005, 07:06   #283  |  Link
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Version 1.4.0 RC7

Here is 1.4.0 RC7. It's a hybrid of RC4 and RC6.

* Restored the legacy support for decoding AC3 to WAV.
* Removed "Process WAV".
* Can no longer apply SRC/normalization to LPCM; it just gets demuxed.
* Implemented a scheme similar to fccHandler's to do an automatic "deep parse" for pack headers.

I'd really like to release this one. A couple guys want the source code, and I prefer to release only final code. So please beat on it. Thank you.

http://neuron2.net/dgmpgdec/dgmpgdec140rc7.zip
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Old 10th July 2005, 10:00   #284  |  Link
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There seems to be a weird chroma problem.
Until now I saw it several times with clips that are not 100% Film.
So using Fieldoperation none.

Everytime when the pattern breaks and the vide becomes interlaced for a few frames, the chroma of the even field is swapped to the odd and vice versa.
This creates a horrible chroma-combing when I do an IVTC afterwards.

http://home.arcor.de/scharfis_brain/samples/scottz.mpg

I do not know, whether it is a problem of all of these files, so concluding the encoders are failing (I've several Files showing this very odd behaviour!)
or a problem of the MPEG-Decoders...
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Old 10th July 2005, 14:04   #285  |  Link
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Can you please post the full script with IVTC, so I can exactly duplicate the issue?
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Old 10th July 2005, 14:49   #286  |  Link
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I served it with Ignore Pulldown Flags and then did assumetff.separatefields. That puts DGDecode pulldown code out of consideration.

Stepping through frames after frame 274, you can see the problem in the source fields.

It's frame structure, so it's highly unlikely that the MPEG2 decoder is doing anything untoward. And the fact that it occurs only when 3:2 sections temporarily stop, even though DGDecode is ignoring pulldown, is suspicious. It just looks like strange source to me.

Last edited by Guest; 11th July 2005 at 04:24.
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Old 10th July 2005, 19:52   #287  |  Link
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ac-3 to wav is back?

BTW can it do 5.1 to 2.0 WAV?
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Old 10th July 2005, 21:08   #288  |  Link
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@neuron2:
thanks for investigating this.

It just looks like strange source to me.

hmm
this isn't the only source showing this weird behaviour.
even DEFT NTSC->PAL conversions (IVTC+Speedup)
are showinc this on pattern breaks

one of those commonly used IVTC-machines must have a big big chroma problem...
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Old 11th July 2005, 04:24   #289  |  Link
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Quote:
Originally Posted by ron spencer
ac-3 to wav is back?

BTW can it do 5.1 to 2.0 WAV?
Yes. Yes (if you mean 5.1 AC3).
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Old 11th July 2005, 19:51   #290  |  Link
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Quote:
Originally Posted by scharfis_brain
@neuron2:
thanks for investigating this.

It just looks like strange source to me.

hmm
this isn't the only source showing this weird behaviour.
even DEFT NTSC->PAL conversions (IVTC+Speedup)
are showinc this on pattern breaks

one of those commonly used IVTC-machines must have a big big chroma problem...
Some observations, for what it's worth and all...

Downloaded source file (scottz.mpg) and it seems a bit off. Looked at the orig. video in Vegas (2 versions -- 2 decoders) at various fps & frame settings. Used latest DGIndex followed by VFAPI in both Vegas & V/Dub, then AviSynth to V/Dub. Lastly tried a few methods of repair and/or conversion.

To my very untrained eye I'd guess that the downloaded video stream was partially processed (IVT) with mixed (non-consistent) flags that tended to confuse every app I tried. The frame numbers appeared consistent, but the length of the video varied by ~2 sec.. Software I used often wanted to insert frames (3:2), and these varied from black to heavily interlaced to frame doubling to std. animation tweeners.

At any rate, I was just curious with a bit of time to offer... If I'm correct in my guessing, you might be able to repair the headers &/or flags, or you could probably find a combination of settings in your normal workflow that works for you... FWIW, using the original file or ignoring flags in DGIndex, I was able to get what I thought reasonable output in V/Dub or Vegas forcing 23.976 p.
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Old 12th July 2005, 01:54   #291  |  Link
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DGMPGDec 1.4.0 Final!

In my experience, the best way to flush out the last bugs is to release the final version.

So DGMPGDec 1.4.0 is now released. The changes from RC7 are as follows:

* Fixed a problem that caused failure of AC3 audio demuxing from a
transport stream if the audio stream was not contained in the PAT/PMT
tables.

* Fixed a problem in DGVfapi that caused conversion of AVS scripts to fail
when they delivered RGB32. [fix by 'tritical']

http://neuron2.net/dgmpgdec/dgmpgdec.html

The source code is available and a DGIndex Reference Manual by Cyberia and myself will be added shortly.

Thank you to all the contributors to this thread for your extremely valuable suggestions, bug reports, and feedback. Special thanks to tritical for his code contributions, to Cyberia for his moderating, housekeeping on the development list, keeping me honest, and reference manual contributions, and to fccHandler for his VirtualDub MPEG2, which served as a model for the dual MPEG1/MPEG2 support, and for his other helpful analyses and suggestions. Remember that aphorism about standing on the shoulders of giants? In real life, I'm a midget.

I'm ready to crank 1.4.1 when the last bug reports roll in. Please don't disappoint me!

Last edited by Guest; 12th July 2005 at 02:04.
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Old 12th July 2005, 03:24   #292  |  Link
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Thanks a lot for your work Neuron2! And to all the others whose work is in this
I'm really starting to get into using it and Avisynth, I really appreciate it.
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Old 12th July 2005, 07:26   #293  |  Link
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Quote:
Originally Posted by neuron2
I'm ready to crank 1.4.1 when the last bug reports roll in. Please don't disappoint me!
Do you think 1.4.1 can include "Decode MPA to WAV"? sorry for asking so late but the final release now says "Decode AC3 to WAV" now and it snapped as to why the MPA wasn't being decoded from the start now. For us HDV cam users ya knaws. If not, np there is always BeSweet/Light.
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Old 12th July 2005, 14:34   #294  |  Link
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hey thanks!!!! over at Videohelp they are calling this a beta in their history notes though...this is final.

thanks!!!
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Old 13th July 2005, 04:02   #295  |  Link
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Quote:
Originally Posted by Backwoods
Do you think 1.4.1 can include "Decode MPA to WAV"?
I'm surprised you didn't contribute to this thread:

http://forum.doom9.org/showthread.php?t=96524

I'll never say never, but it's unlikely to rise high on the priority list anytime soon.
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Old 13th July 2005, 17:32   #296  |  Link
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Ah, I remember that thread when it started but I failed to keep up with it.

That thread talked me into to keep using BeSweet/Light.
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Old 13th July 2005, 21:38   #297  |  Link
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I've got one minor bug report, line 256 in vfapidec.cpp... the fscanf format string has a %s where it should have %dx%d. It doesn't make much difference since those values are never used, but it does cause some stack corruption around the integer variables which causes an error when trying to use a debug build.
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Old 13th July 2005, 22:01   #298  |  Link
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Quote:
Originally Posted by tritical
I've got one minor bug report, line 256 in vfapidec.cpp
LOL. It's been like that since at least 1.0.12! Thanks for pointing it out.
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Old 16th July 2005, 12:37   #299  |  Link
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I have a feature request for the commandline if you wouldn't mind: allow the selection of multiple audio track IDs to be demuxed. Right now, it's none, one or everything. I guess one is the most commonly used, but two isn't out of the question either, and if your source has more than two, you end up wasting space for an extracted track you do not need (and if dgindex is run from a third party software, routines have to be written to re-identify the proper files (not that it is much of a problem but it would be nice to get around that from the start)).
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Old 16th July 2005, 12:48   #300  |  Link
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@Doom9

Just out of curiosity, how does your program know which tracks to select?
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