help testing mpeg2 multichannel compatibility

Doom9 · 12th November 2001, 13:31

There you go: a first link for an audio-only mpeg2 multichannel testfile. Add a video stream to it, make sure the bitrate doesn't go beyond SVCD limits, burn, test in your player and report the results here.

http://www.mondoria.de/editing/mpeg/doom9/mc.mpa
http://www.saunalahti.fi/pace/mc.mpa
http://www.celsworth.demon.co.uk/mc.mpa
ftp://ftp.comshare.com/pub/incoming/...qb5n29/mc.mpeg
http://www.thesaguaros.com/guests/doom9/mc.mpa
http://lusodivx.com.sapo.pt/mc.mpa
http://perso.wanadoo.fr/xavier.dugast/mc.mpa

macdaddy · 13th November 2001, 00:21

Downloading now, and crossing my fingers...

Thanks.

Divine · 13th November 2001, 00:30

Works perfect at Cyberhome 5xx series so far.
I think it will work at the older one too.

I also have a Pioneer dv535, will try to test it on that one later

Btw. what programs can you use to make mpeg2 multichannel streams?
Only 1 atm, rempeg2 ?

macdaddy · 13th November 2001, 00:48

My receiver shows prologic, and only R and L are lit, but sound comes from all speakers, and my receiver allows me to adjust them all-as if it were a 5.1 signal. Previously, with SVCD, I would only get sound from L,R,C,S and never the surrounds...

I would love to know how to do this; I hope this helps...

btw, what is the audio from?

shahmat · 13th November 2001, 06:50

...great sounds from L/R and sub (can't tell with the center channel, speaker's screwed up) but there's nothing coming out of the rear left and right channels. However, Nero did tell me that it only detected a 2 channel audio stream - could Nero be clipping the rear channels out of the 5.1?

Shah Mat
Lord of the Land Of COnfusion (LOCO)

***EDIT***

I doubt you were wondering, but I accidentally encoded my test SVCD video stream at 720X480, and even though Nero didn't like it, it let me burn it. However, my DV-525 didn't complain. So note to those people with a Pioneer DVD player: if you're watching SVCDs on it, you probably don't even need to resize your picture from the DVD rip.

Absimilliard · 13th November 2001, 10:36

I pushed it through the DTT5500 and sounds very good.
I recoded it to an ac3 and the result is missing some high pitches on the left channel but basicly good results.

Migsan76 · 13th November 2001, 16:33

One more link to download hosting by www.lusodivx.de.vu

www.lusodivx.com.sapo.pt\mc.mpa

Taric25 · 14th November 2001, 00:49

If you guys/gals are wondering what program to use, I can assist to get max. compatibility.

Mux with I-author and burn the image file. If you don't have EZCD Creator, open the cif in ISOBuster (Batman!

) and save it as an ISO to use with practically any burning program.

charlesky · 14th November 2001, 01:51

Ok, I muxed in a few mins of video for SVCD and played it (Nero complained about the audio track, but it played fine in my Euro Toshiba SD210). My amplifier (a Yamaha 3090 hooked up with a digital link to my DVD player) showed Pro Logic decoding. I got audio out of both the rear speakers and the centre speaker.

Ummmm...

Sorry, but this tells me nothing. The Yamaha 3090 is one of the earliest 6-channel decoder/amps that were made. It certainly doesn't decode MPEG2 5.1 audio. I think it's pretty clear that it was seeing a 2-channel input and extracting enough sum and difference signals to feed to the centre and surround speakers.

Doom, if you really want to test MPEG2 5.1 decoding, you need to find a track with separate R surround/L surround elements, otherwise ordinary prologic decoding will sound the same.

macdaddy · 14th November 2001, 03:53

I expected a larger response...

The file is actually 2-channels, right? The only thing Nero complains about is that the file is 48KHz. For those receiving similar messages, simply opt to turn off compliance and continue...

Reading some of the posts above, I am wondering if I might have done something wrong in the muxing. You are not talking about 6 discreet audio streams, are you? I simply loaded the file into bbMPEG as the 1st audio stream, used a video clip (to which I had already applied pulldown) as the video source, set beginning time to 5 sec/end time to 210 sec, and muxed away...

Is there a way we are supposed to be muxing 6 audio streams (for the 5.1 channels), or are we putting everything into 2 streams? If the latter is the case, how does this differ from using headache->(ssrc)->toolame? They both are prologic, 2 channel streams...

Thanks, in advance, for the help with my questions.

Newacey · 14th November 2001, 12:22

First Of all I like to thank doom9 for what he did, so that we can finally test mpeg2 multichannel Compatibility.

To Answer a few Question in this Forum:

I have a Philips DVD 762 and the file works perfectly with my DVD-Player.

The Left an Right Surround Channels are different, e.g. when there's all that shooting going on, you can cleary distinguish between left and right surround.
( There's also another way how you can check whether the left and right surrounds are different. Trans-Code just any AC-3 (5.1) stream you want with ReMpeg to an Mpeg2-Stream. ReMpeg has a small bug, so the right surround channel will not be encoded properly. If you test this file now on your DVD-player only one Surround Channel should work. If this is the case you know, that l and r surround are different.
I'm also having a testfile, where every channel is tested separately, but this one has the above bug. I'll try to find the URL, so other people can test this one as well. )

A lot of a programs say this file is 2-ch only but it IS 6-CH, so just ignore this message.

Everybody who has an internal AC-3 decoder (bulit-in the DVD-Player)should also check this one, since the probability that this one plays the stream correctly should be higher.

Newacey · 14th November 2001, 12:28

I found the URL of the other multichannel-testfile (see my post above).
Please note that this file is not 100% mc-conform, but it's still worth a try.

http://www.stud.uni-siegen.de/sven.k...c-test-6ch.mpa

twitch · 14th November 2001, 15:26

First off I'm a sorta new user, I've been lurking for a few months but never registered. So I'd like to start off by saying a big thanks to Doom9 and all the forum moderators for the huge wealth of information that this site and forums offer.

I burned the test file with a few minutes of video and in nero I got the non-compliance nag which I ignored. On my Apex 500 it played (as svcd's usually do) out both the l/r/c and the surround speakers. I believe the surround speakers were both playing the same track though as the receiver did not kick into Dolby Digital mode (it just stayed in pro logic).

I didn't listen too far in, I just now read that at some point gunfire makes it easy to distinguish between all the speakers. But I got to thinking, wouldn't the easiest thing to do is make an audio track from a bunch of wav files with a voice saying 'This is the right speaker', 'This is the right surround speaker' etc. That way it would be easy to tell what speakers are on at what times.

Just a thought.

T

macdaddy · 14th November 2001, 15:31

and I promise I will test it out...

Doom9 · 14th November 2001, 16:27

twitch.. excellent idea. I once had such an AC3 testfile but I don't recall where it's from... anybody has such a file? It's certainly on soundcheck DVDs... all we need to do is to convert it to a real mp2 multichannel file.. that would indeed make the tests more useful

Divine · 14th November 2001, 16:40

Nice one,
I remember i have such a file on one of my dvds.
It plays all channels seperately. (you hear a voice or music)

I will contact you on irc doom9, so i can send it.

Doom9 · 14th November 2001, 16:56

okay... anybody good at converting ac3 to mp2 mc? Perferably using the linux tools there are so that we get a true specs compliant file. Also.. if you could add a dummy video track to it so that it just can be burned.. would be great. pm/email me and you can get the file..

DanniDin · 14th November 2001, 17:13

I Don't Know if this is What You Need But Here is a SurroundTest.ac3 I Downloaded Long Time Ago from Oleg's.

Danni.

Taric25 · 14th November 2001, 20:43

I just started with a little thread on this forum and all of a sudden, my thread is in the news! (Thanks Doom9!)

You have a good idea, Twitch, except for the fact that not everyone speaks English. You wouldn't believe how many people copy the text and translate it using Babelfish into their own language and don't know how to pronounce or understand spoken English. It would have to be more of a universal thing. Anyone up to encoding those THX tests from their DVDs and uploading them here?

And you. Yes, you, the person reading this post, but not contributing to it. Download the file and test with it so you can contriute to this thread. Confused? This might help.

tintin1001 · 14th November 2001, 21:11

Tested on a SCOTT DVD 838 and a Panasonic R-71
The Scott plays SVCD without any problem the Panaonic Stutters but plays VCD in amzaing quality.. now to the Sound:

Nothing, both players decode the stream before they send them to my Reciever (handles MPEG AC-3 and DTS).

I get a PCM Stream @ 48 Khz instead of a mpeg stream.

Oh well :-(

12th November 2001, 13:31	#1 \| Link
Doom9 clueless n00b Join Date: Oct 2001 Location: somewhere over the rainbow Posts: 10,258	help testing mpeg2 multichannel compatibility There you go: a first link for an audio-only mpeg2 multichannel testfile. Add a video stream to it, make sure the bitrate doesn't go beyond SVCD limits, burn, test in your player and report the results here. http://www.mondoria.de/editing/mpeg/doom9/mc.mpa http://www.saunalahti.fi/pace/mc.mpa http://www.celsworth.demon.co.uk/mc.mpa ftp://ftp.comshare.com/pub/incoming/...qb5n29/mc.mpeg http://www.thesaguaros.com/guests/doom9/mc.mpa http://lusodivx.com.sapo.pt/mc.mpa http://perso.wanadoo.fr/xavier.dugast/mc.mpa

13th November 2001, 00:21	#2 \| Link
macdaddy Registered User Join Date: Oct 2001 Location: City of Angels Posts: 109	- Downloading now, and crossing my fingers... Thanks.

13th November 2001, 00:48	#4 \| Link
macdaddy Registered User Join Date: Oct 2001 Location: City of Angels Posts: 109	works with my Tredex My receiver shows prologic, and only R and L are lit, but sound comes from all speakers, and my receiver allows me to adjust them all-as if it were a 5.1 signal. Previously, with SVCD, I would only get sound from L,R,C,S and never the surrounds... I would love to know how to do this; I hope this helps... btw, what is the audio from?

13th November 2001, 06:50	#5 \| Link
shahmat X-Coding DVDs since 1999 Join Date: Oct 2001 Location: The Land Of COnfusion Posts: 21	On a Pioneer DV-525... ...great sounds from L/R and sub (can't tell with the center channel, speaker's screwed up) but there's nothing coming out of the rear left and right channels. However, Nero did tell me that it only detected a 2 channel audio stream - could Nero be clipping the rear channels out of the 5.1? Shah Mat Lord of the Land Of COnfusion (LOCO) *EDIT* I doubt you were wondering, but I accidentally encoded my test SVCD video stream at 720X480, and even though Nero didn't like it, it let me burn it. However, my DV-525 didn't complain. So note to those people with a Pioneer DVD player: if you're watching SVCDs on it, you probably don't even need to resize your picture from the DVD rip. Last edited by shahmat; 13th November 2001 at 18:32.

13th November 2001, 16:33	#7 \| Link
Migsan76 Portuguese DivX Maker Join Date: Oct 2001 Location: Portugal Posts: 61	One More Link to Download! One more link to download hosting by www.lusodivx.de.vu www.lusodivx.com.sapo.pt\mc.mpa Last edited by Migsan76; 13th November 2001 at 16:37.

13th November 2001, 00:30	#3 \| Link
Divine Registered User Join Date: Oct 2001 Location: Earth Posts: 33	Works perfect at Cyberhome 5xx series so far. I think it will work at the older one too. I also have a Pioneer dv535, will try to test it on that one later Btw. what programs can you use to make mpeg2 multichannel streams? Only 1 atm, rempeg2 ?

13th November 2001, 10:36	#6 \| Link
Absimilliard Registered User Join Date: Nov 2001 Location: Germany Posts: 7	I pushed it through the DTT5500 and sounds very good. I recoded it to an ac3 and the result is missing some high pitches on the left channel but basicly good results.

14th November 2001, 00:49	#8 \| Link
Taric25 Anime Otaku Join Date: Oct 2001 Location: Illinois, USA Posts: 149	What program to use. If you guys/gals are wondering what program to use, I can assist to get max. compatibility. Mux with I-author and burn the image file. If you don't have EZCD Creator, open the cif in ISOBuster (Batman! ) and save it as an ISO to use with practically any burning program.

14th November 2001, 01:51	#9 \| Link
charlesky Registered User Join Date: Oct 2001 Location: London Posts: 6	Ok, I muxed in a few mins of video for SVCD and played it (Nero complained about the audio track, but it played fine in my Euro Toshiba SD210). My amplifier (a Yamaha 3090 hooked up with a digital link to my DVD player) showed Pro Logic decoding. I got audio out of both the rear speakers and the centre speaker. Ummmm... Sorry, but this tells me nothing. The Yamaha 3090 is one of the earliest 6-channel decoder/amps that were made. It certainly doesn't decode MPEG2 5.1 audio. I think it's pretty clear that it was seeing a 2-channel input and extracting enough sum and difference signals to feed to the centre and surround speakers. Doom, if you really want to test MPEG2 5.1 decoding, you need to find a track with separate R surround/L surround elements, otherwise ordinary prologic decoding will sound the same.

14th November 2001, 03:53	#10 \| Link
macdaddy Registered User Join Date: Oct 2001 Location: City of Angels Posts: 109	1000+ views, 8 replies? I expected a larger response... The file is actually 2-channels, right? The only thing Nero complains about is that the file is 48KHz. For those receiving similar messages, simply opt to turn off compliance and continue... Reading some of the posts above, I am wondering if I might have done something wrong in the muxing. You are not talking about 6 discreet audio streams, are you? I simply loaded the file into bbMPEG as the 1st audio stream, used a video clip (to which I had already applied pulldown) as the video source, set beginning time to 5 sec/end time to 210 sec, and muxed away... Is there a way we are supposed to be muxing 6 audio streams (for the 5.1 channels), or are we putting everything into 2 streams? If the latter is the case, how does this differ from using headache->(ssrc)->toolame? They both are prologic, 2 channel streams... Thanks, in advance, for the help with my questions.

14th November 2001, 12:22	#11 \| Link
Newacey Registered User Join Date: Oct 2001 Location: Germany Posts: 23	First Of all I like to thank doom9 for what he did, so that we can finally test mpeg2 multichannel Compatibility. To Answer a few Question in this Forum: I have a Philips DVD 762 and the file works perfectly with my DVD-Player. The Left an Right Surround Channels are different, e.g. when there's all that shooting going on, you can cleary distinguish between left and right surround. ( There's also another way how you can check whether the left and right surrounds are different. Trans-Code just any AC-3 (5.1) stream you want with ReMpeg to an Mpeg2-Stream. ReMpeg has a small bug, so the right surround channel will not be encoded properly. If you test this file now on your DVD-player only one Surround Channel should work. If this is the case you know, that l and r surround are different. I'm also having a testfile, where every channel is tested separately, but this one has the above bug. I'll try to find the URL, so other people can test this one as well. ) A lot of a programs say this file is 2-ch only but it IS 6-CH, so just ignore this message. Everybody who has an internal AC-3 decoder (bulit-in the DVD-Player)should also check this one, since the probability that this one plays the stream correctly should be higher.

14th November 2001, 12:28	#12 \| Link
Newacey Registered User Join Date: Oct 2001 Location: Germany Posts: 23	I found the URL of the other multichannel-testfile (see my post above). Please note that this file is not 100% mc-conform, but it's still worth a try. http://www.stud.uni-siegen.de/sven.k...c-test-6ch.mpa

14th November 2001, 15:26	#13 \| Link
twitch Registered User Join Date: Nov 2001 Posts: 1	First off I'm a sorta new user, I've been lurking for a few months but never registered. So I'd like to start off by saying a big thanks to Doom9 and all the forum moderators for the huge wealth of information that this site and forums offer. I burned the test file with a few minutes of video and in nero I got the non-compliance nag which I ignored. On my Apex 500 it played (as svcd's usually do) out both the l/r/c and the surround speakers. I believe the surround speakers were both playing the same track though as the receiver did not kick into Dolby Digital mode (it just stayed in pro logic). I didn't listen too far in, I just now read that at some point gunfire makes it easy to distinguish between all the speakers. But I got to thinking, wouldn't the easiest thing to do is make an audio track from a bunch of wav files with a voice saying 'This is the right speaker', 'This is the right surround speaker' etc. That way it would be easy to tell what speakers are on at what times. Just a thought. T

14th November 2001, 15:31	#14 \| Link
macdaddy Registered User Join Date: Oct 2001 Location: City of Angels Posts: 109	you make the file... and I promise I will test it out...

14th November 2001, 16:27	#15 \| Link
Doom9 clueless n00b Join Date: Oct 2001 Location: somewhere over the rainbow Posts: 10,258	twitch.. excellent idea. I once had such an AC3 testfile but I don't recall where it's from... anybody has such a file? It's certainly on soundcheck DVDs... all we need to do is to convert it to a real mp2 multichannel file.. that would indeed make the tests more useful __________________ For the web's most comprehensive collection of DVD backup guides go to www.doom9.org

14th November 2001, 16:40	#16 \| Link
Divine Registered User Join Date: Oct 2001 Location: Earth Posts: 33	Nice one, I remember i have such a file on one of my dvds. It plays all channels seperately. (you hear a voice or music) I will contact you on irc doom9, so i can send it.

14th November 2001, 16:56	#17 \| Link
Doom9 clueless n00b Join Date: Oct 2001 Location: somewhere over the rainbow Posts: 10,258	okay... anybody good at converting ac3 to mp2 mc? Perferably using the linux tools there are so that we get a true specs compliant file. Also.. if you could add a dummy video track to it so that it just can be burned.. would be great. pm/email me and you can get the file.. __________________ For the web's most comprehensive collection of DVD backup guides go to www.doom9.org

14th November 2001, 17:13	#18 \| Link
DanniDin Registered User Join Date: Oct 2001 Posts: 187	I Don't Know if this is What You Need But Here is a SurroundTest.ac3 I Downloaded Long Time Ago from Oleg's. Danni.

14th November 2001, 20:43	#19 \| Link
Taric25 Anime Otaku Join Date: Oct 2001 Location: Illinois, USA Posts: 149	Look what I've started! I just started with a little thread on this forum and all of a sudden, my thread is in the news! (Thanks Doom9!) You have a good idea, Twitch, except for the fact that not everyone speaks English. You wouldn't believe how many people copy the text and translate it using Babelfish into their own language and don't know how to pronounce or understand spoken English. It would have to be more of a universal thing. Anyone up to encoding those THX tests from their DVDs and uploading them here? And you. Yes, you, the person reading this post, but not contributing to it. Download the file and test with it so you can contriute to this thread. Confused? This might help. Last edited by Taric25; 15th November 2001 at 00:52.

14th November 2001, 21:11	#20 \| Link
tintin1001 Registered User Join Date: Oct 2001 Posts: 12	No Luck Tested on a SCOTT DVD 838 and a Panasonic R-71 The Scott plays SVCD without any problem the Panaonic Stutters but plays VCD in amzaing quality.. now to the Sound: Nothing, both players decode the stream before they send them to my Reciever (handles MPEG AC-3 and DTS). I get a PCM Stream @ 48 Khz instead of a mpeg stream. Oh well :-(

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