DGMPGDec 1.4.0 Final! - Page 5

neuron2 · 3rd June 2005, 06:12

OK, here's a version that should open MPEG1 program streams. All the previous caveats apply. I also should advise that the audio is not yet supported either. Right now, I just want to shake down the MPEG1 video. Please advise if you find any MPEG1 files that cannot be decoded. Also, please advise if you find any regressions in the existing MPEG2 support. Thank you.

http://neuron2.net/dgmpgdec/dgmpgdec131b9.zip

Cyberia · 3rd June 2005, 07:28

I have a few giving the "warning: opening gop not closed" message. Does MPEG1 have gops?

Also, mpegs with 160 pixels or less vertically, make the slider bar and buttons disappear.

Besides that, every one of my test mpegs played!

iradic · 3rd June 2005, 10:08

Hi, just to say its working for mpeg1 here...

one question... it says interlaced - can this be true ..
mpeg1 is captured with pctv and re/de muxed a few times
burned to vcd and extracted from it ... ?

neuron2 · 3rd June 2005, 14:25

Quote:

Originally Posted by Cyberia

I have a few giving the "warning: opening gop not closed" message. Does MPEG1 have gops?

Yes, MPEG1 has GOPs.

Quote:

Also, mpegs with 160 pixels or less vertically, make the slider bar and buttons disappear.

Yes, I saw that too. It resizes correctly when you hit F5, strangely.

Quote:

Besides that, every one of my test mpegs played!

Good. Thanks for the feedback.

neuron2 · 3rd June 2005, 14:27

Quote:

Originally Posted by iradic

one question... it says interlaced - can this be true ..

No, it can't be true, because MPEG1 doesn't have the concept of interlacing. I just forgot about that info box item. Thanks for pointing it out.

Does anyone have a VOB with MPEG1 in it. I need one for testing.

SeeMoreDigital · 3rd June 2005, 14:51

Quote:

Originally Posted by neuron2

No, it can't be true, because MPEG1 doesn't have the concept of interlacing. I just forgot about that info box item. Thanks for pointing it out.

Does anyone have a VOB with MPEG1 in it. I need one for testing.

I noticed this too!

I tried using TMPGEnc and MuxMan to create some Mpeg1 in VOB files but keep getting GOP warnings

Cheers

Nic · 3rd June 2005, 15:50

@neuron2: If you use QuEnc and set the mux profile to DVD and the codec to MPEG-1 you will get a VOB file with MPEG-1 video (make sure to have Audio in the AVS too, otherwise just a raw m1v stream will be created)

-Nic

iNFO-DVD · 3rd June 2005, 18:17

DGIndex used on MPEG1 I mastered as a DVD file then ripped the VOB file and loaded that VOB file in:

Picked up the Audio too and made the D2V file and MPA file, cool, worked fine.

neuron2 · 3rd June 2005, 18:32

Thanks, Nic and iNFO-DVD. It's not picking up the audio from MPEG1 program streams, though (VOB is MPEG2 program stream). I'm going to finish up MPEG1 video in DGDecode and then go back and straighten out the audio.

Cyberia · 3rd June 2005, 18:52

MPEG-1 video appears to be demuxing correctly too! Sweet.

Although, the demuxed file has an .m2v extension. Shouldn't it be .m1v?

neuron2 · 3rd June 2005, 19:02

Quote:

Originally Posted by Cyberia

Shouldn't it be .m1v?

That's a rhetorical question, I assume.

Me will fix. Thank you for your feedback.

Cyberia · 3rd June 2005, 19:14

Does MPEG1 have an Aspect_Ratio flag?

If not, how is the Info panel determining this (or is that an incomplete section of the great masterpiece?)

neuron2 · 3rd June 2005, 20:34

Quote:

Originally Posted by Cyberia

Does MPEG1 have an Aspect_Ratio flag?

Yes: pel_aspect_ratio, as defined in ISO 11172-2.

neuron2 · 4th June 2005, 06:18

Getting closer, people...

I bumped the beta version to 1.4.0b1 to reflect the major addition of MPEG1 support. This version adds MPEG1 support to DGDecode. Please beat on it.

http://neuron2.net/dgmpgdec/dgmpgdec140b1.zip

Still remaining are the following tasks to complete the job:

1. Fix window sizing problem with small frame size in DGIndex.

2. Add audio demuxing from MPEG1 program streams in DGIndex.

3. Grab video PTS and generate audio delay in filenames in DGIndex.

4. Use correct MPEG1 chroma siting for upsampling (currently uses MPEG2, although you'd be hard pressed to see the difference).

ChickenMan · 4th June 2005, 14:08

Darn, just tried it with DVD2SVCD and I get a "Floating point division by zero" just before CCE starts encoding

Oh well, thought it would be to good to be true. Maybe Mr DVD2SVCD needs to do a bit of tweeking to support this new version

EDIT: Just tried it with a MPEG2 stream as well, different errors, so looks like its back to good old ver 1.11

neuron2 · 4th June 2005, 14:14

The D2V file format is changed, so that may be the reason. I don't know how DVD2SVCD uses DGMPGDec.

Are you able to decode the MPEG1 just using DGIndex/DGDecode?

ChickenMan · 4th June 2005, 15:16

Yep I suspect the changed D2V format is the problem, so we all just wait for an updated DVD2SVCD then

My few test MPEG1 mpegs (PAL & NTSC) all loaded into DGIndex okay (never found the audio though but all listed as Progressive), saved Project and that loaded and encoded fine with TMPGenc. Havent tried any avisyth scripts yet.

SeeMoreDigital · 4th June 2005, 15:43

Quote:

Originally Posted by neuron2

Are you able to decode the MPEG1 just using DGIndex/DGDecode?

Mpeg1 video and audio de-muxing works perfectly for me!

I managed to find an 1GB .VOB file (Mpeg1 video @ 352x240 and MP2 audio), which 1.4.0 beta 1 had no difficulty in de-muxing. However, I was unable to use MuxMan to re-mux the streams back to .VOB as it complained of GOP length error!

Cheers

absinthe · 4th June 2005, 16:36

Quote:

Originally Posted by neuron2

Are you able to decode the MPEG1 just using DGIndex/DGDecode?

I was able to decode MPG1 and MPA audio from a VOB with no prob (hey, that rhymed).

Doesn't recognize DAT files (had to change extension to MPG ... no big deal there, though).

Does not seem to demux audio from VCD MPG file (is it suposed to?), but does demux the video fine.

Thanks!

-abs

neuron2 · 4th June 2005, 16:58

Quote:

Originally Posted by ChickenMan

never found the audio though

I said that audio demuxing from MPEG1 program streams isn't there yet. I do have it working here and will release a new beta shortly.

Quote:

Originally Posted by SeeMoreDigital

However, I was unable to use MuxMan to re-mux the streams back to .VOB as it complained of GOP length error!

DGIndex does not modify the GOP in any way. Can you please follow this up with mpucoder?

Quote:

Originally Posted by absinthe

Doesn't recognize DAT files (had to change extension to MPG ... no big deal there, though).

Does not seem to demux audio from VCD MPG file (is it suposed to?), but does demux the video fine.

You shouldn't have to change the filename. Either drop the file on DGIndex, or use "Files of type" to select All Files in the open dialog.

VCD is an MPEG1 program stream so the above point about the audio applies. I have it working and will release a new beta with everything done just as soon as I complete the delay calculation. Should be within an hour.

Thanks, folks, for your useful feedback.

3rd June 2005, 06:12	#81 \| Link
neuron2 _ Join Date: Jan 2002 Posts: 16,634	Beta 9 opens MPEG1 program streams OK, here's a version that should open MPEG1 program streams. All the previous caveats apply. I also should advise that the audio is not yet supported either. Right now, I just want to shake down the MPEG1 video. Please advise if you find any MPEG1 files that cannot be decoded. Also, please advise if you find any regressions in the existing MPEG2 support. Thank you. http://neuron2.net/dgmpgdec/dgmpgdec131b9.zip Last edited by neuron2; 3rd June 2005 at 06:19.

3rd June 2005, 18:32	#89 \| Link
neuron2 _ Join Date: Jan 2002 Posts: 16,634	Thanks, Nic and iNFO-DVD. It's not picking up the audio from MPEG1 program streams, though (VOB is MPEG2 program stream). I'm going to finish up MPEG1 video in DGDecode and then go back and straighten out the audio. Last edited by neuron2; 3rd June 2005 at 18:35.

4th June 2005, 06:18	#94 \| Link
neuron2 _ Join Date: Jan 2002 Posts: 16,634	MPEG1 support in DGDecode Getting closer, people... I bumped the beta version to 1.4.0b1 to reflect the major addition of MPEG1 support. This version adds MPEG1 support to DGDecode. Please beat on it. http://neuron2.net/dgmpgdec/dgmpgdec140b1.zip Still remaining are the following tasks to complete the job: 1. Fix window sizing problem with small frame size in DGIndex. 2. Add audio demuxing from MPEG1 program streams in DGIndex. 3. Grab video PTS and generate audio delay in filenames in DGIndex. 4. Use correct MPEG1 chroma siting for upsampling (currently uses MPEG2, although you'd be hard pressed to see the difference).

4th June 2005, 14:08	#95 \| Link
ChickenMan Registered User Join Date: Oct 2001 Location: Australia Posts: 330	Darn, just tried it with DVD2SVCD and I get a "Floating point division by zero" just before CCE starts encoding Oh well, thought it would be to good to be true. Maybe Mr DVD2SVCD needs to do a bit of tweeking to support this new version EDIT: Just tried it with a MPEG2 stream as well, different errors, so looks like its back to good old ver 1.11 Last edited by ChickenMan; 4th June 2005 at 14:14.

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3rd June 2005, 07:28	#82 \| Link
Cyberia Moderator Join Date: Nov 2002 Location: Inside Posts: 718	I have a few giving the "warning: opening gop not closed" message. Does MPEG1 have gops? Also, mpegs with 160 pixels or less vertically, make the slider bar and buttons disappear. Besides that, every one of my test mpegs played!

3rd June 2005, 10:08	#83 \| Link
iradic Registered User Join Date: Jan 2004 Posts: 332	Hi, just to say its working for mpeg1 here... one question... it says interlaced - can this be true .. mpeg1 is captured with pctv and re/de muxed a few times burned to vcd and extracted from it ... ?

3rd June 2005, 15:50	#87 \| Link
Nic Moderator Join Date: Oct 2001 Location: England Posts: 3,260	@neuron2: If you use QuEnc and set the mux profile to DVD and the codec to MPEG-1 you will get a VOB file with MPEG-1 video (make sure to have Audio in the AVS too, otherwise just a raw m1v stream will be created) -Nic

3rd June 2005, 18:17	#88 \| Link
iNFO-DVD Author of avi.NET rip.NET Join Date: Apr 2005 Location: England [UK] Posts: 408	DGIndex used on MPEG1 I mastered as a DVD file then ripped the VOB file and loaded that VOB file in: Picked up the Audio too and made the D2V file and MPA file, cool, worked fine.

3rd June 2005, 18:52	#90 \| Link
Cyberia Moderator Join Date: Nov 2002 Location: Inside Posts: 718	MPEG-1 video appears to be demuxing correctly too! Sweet. Although, the demuxed file has an .m2v extension. Shouldn't it be .m1v?

3rd June 2005, 19:14	#92 \| Link
Cyberia Moderator Join Date: Nov 2002 Location: Inside Posts: 718	Does MPEG1 have an Aspect_Ratio flag? If not, how is the Info panel determining this (or is that an incomplete section of the great masterpiece?)

4th June 2005, 14:14	#96 \| Link
neuron2 _ Join Date: Jan 2002 Posts: 16,634	The D2V file format is changed, so that may be the reason. I don't know how DVD2SVCD uses DGMPGDec. Are you able to decode the MPEG1 just using DGIndex/DGDecode?

4th June 2005, 15:16	#97 \| Link
ChickenMan Registered User Join Date: Oct 2001 Location: Australia Posts: 330	Yep I suspect the changed D2V format is the problem, so we all just wait for an updated DVD2SVCD then My few test MPEG1 mpegs (PAL & NTSC) all loaded into DGIndex okay (never found the audio though but all listed as Progressive), saved Project and that loaded and encoded fine with TMPGenc. Havent tried any avisyth scripts yet.