*Muxing AC3 sound and DivX video > 2GB?!?

[RedRaider]

I usually encode the video and rip the original AC3 sound and mux them together with Nandub... if the file is getting larger than 2 GB the sync gets lost and I can't watch it with PowerDivX NG anymore! Is there another program I can use to mux both streams and get a file larger than 2 Gig which still plays fine?!? What is the difference between Avi and the OpenDML stuff that used to be in FlasK?

[MaTTeR]

NanDub does a perfect job when muxing AC3. If your having problems with ND then you could try using Doom9's GraphEdit guide for muxing. It's a little more difficult to use but it's an alternative.

I find it curious that after 2GB your having sync issues. What OS are you using? Have you tried saving the file to an NTFS partition?

OpenDML seems to be an AVI format that allows for a little flexibility over the generic AVI flavor's. Sorry I don't have specifics though. If you have the option, use OpenDML as it should allow you to encode using the YUV color space as well.

EDIT- Did you try any other players besides PD?

[RedRaider]

The problem is that I'm not sure what exactly is causing the problems... I want to join Video with AC3 sound and I use NanDub for the job. When the final file is getting bigger than 2048 MB (2 gig) I get sync problems in PowerDivX NG. I haven't tryied very much other players since they have to support AC3 sound and have to offer custom aspect ratios since I encode in the original anamorph DVD resolution! WMP has no aspect ratios and sync gets fxxxxd too IIRC. DivX Player 2.0 can't handle AC3... Is Avi the reason for the sync problems, NanDub or PowerDivx? Forgot to mention that I have always been using W2K or XP and only have ntfs partitions... so this shouldn't be the reason!

[MaTTeR]

First off, please go read the forum rules. Offensive language is unacceptable in the forums. Now I'll have to edit your post.

Most all the players out handle AC3 just fine. BSplayer and ZoomPlayer come to mind. Of course I'm sure ZP also supports whatever aspect ratio you need. You should try the to see if sync issues still exist.

I'm sure you have also seen hundreds of posts on the web about Flask having sync issues:D It's a well known issue and still has tons of bugs. You'll find most users on this forum using Gknot for encoding. Not using Flask would take one variable out of the situation.

[RedRaider]

Sorry 4 swearing... I didn't know kids read this forum...

I'm not using Flask... I just remember that there was something with opendml which apparantly allows files beeing bigger than 2 Gig... I usually encode the video with VirtualDub, rip the ac3 with SmartRipper and mux them with NanDub... I have no clue if NanDub writes OpenDML avi files... couldn't find any inforamtion about it...

[MaTTeR]

Originally posted by RedRaider
I didn't know kids read this forum...
You have to assume we have several teenagers on the board. Truthfully, I'm 29 and still don't need to hear it :->


I have no clue if NanDub writes OpenDML avi files... couldn't find any inforamtion about it...
AFAIK NanDub doesn't support OpenDML but I could be wrong;)

[MaTTeR]

Quote from Doom9's FAQ-

Why can't I have larger files than 2GB?

It's a limit of the AVI format. Only OpenDML AVIs can overcome this limit but most ripping programs can't create such files. There's however a possibility to overcome that limit: Windows NT or preferably 2000 and XP have no such problems.

Did you try saving your file as a Segmented AVI?

[RedRaider]

I have saved it as segmented avi but I want to avoid splitting the file! I want a seamless 3 hour experience :c)

Okay... if NanDub doesn't support OpenDML Avis there isn't a big chance that it will ever get it! Maybe Avery feels like implementing it!

If NanDub saves OpenDML Avis the reason why I get sync problems must be the player... I'll check some other players out!

Cheers 4 your extensive help mate!
Do you like Richard D. James or why do you have this icon?

[MaTTeR]

Originally posted by RedRaider
Cheers 4 your extensive help mate!
Do you like Richard D. James or why do you have this icon?
I'm not a big fan to be honest. You gotta love the covers though:D Good luck!

BTW- If you find a seamless solution do let us know please. We'll add it to the FAQ.

[RedRaider]

Yeah! I'll be very anyoing this time and keep asking until I have an answer! I refuse to believe that this can't be done!

[DSPguru]

Originally posted by RedRaider
Sorry 4 swearing... I didn't know kids read this forum...i guess that kids are more polite. right :) ?

[fritzdis]

VirtualDub (and therefore assumably Nandub) can indeed produce OpenDML files (see the "features" section of the VirtualDub homepage), so unless you are choosing to save as an old formatted AVI (which I highly doubt), Nandub has no trouble creating files > 2 GB. The only thing that might be an issue is how AC3 support was introduced to Nandub and how that might effect saving OpenDML files.

I have created MP3-muxed files larger than 2 GB without problem, but unfortunately, I too am having playback problems with muxing Smartripper-ripped AC3 with Nandub-encoded video with a resulting filesize of > 2 GB. I use Nandub to mux, and I use Win2k with NTFS drives.

I have tried playing the file with BSPlayer, ZoomPlayer, and WMP, none of which work correctly. In WMP, it plays fine until I try to seek, at which point it gives me a "File Format is invalid" error. When I open the file with BSPlayer, I get an error message "Overlay failed". It then plays the file fine, but as soon as I try to seek, the sync is totally lost. In ZoomPlayer, it opens normally and again plays fine until I try to seek, at which point sync is lost. I have not watched the entire clip to check if sync stays correct if I never seek, but sync is perfect for at least the first 15 minutes if I don't seek.

I know this post doesn't really help solve the problem, but at least it shows that it's a problem faced by more than one person

[MaTTeR]

So you used the SR map feature to demux the AC3? What if you tried just use normal stream processing and then have DVD2AVI demux the AC3?

It's a guess but maybe SR is doing some strange to the AC3 while demuxing it. I always use the method above and have yet to see any problems, on the other hand I've yet to save anything out over 2GB.

[fritzdis]

Yes, I use the SR map feature to demux the AC3. I'd never encountered a problem with it until I saved a file over 2 gb, but I suppose it might be worth trying the dvd2avi method just to see. If I do it I'll post the results.

[RedRaider]

fritzdis I'm really glad that I'm not the only one out there who has this problem! I play my files with PowerDivX NG and the files > 2 Gig play fine until you start too seek as well! Haven't tried watching the whole thing either... If I got the time later I'll rip the AC3 with dvd2avi and compare the two files! ChristianHJW said in the PowerDivX forum that he can create 3,9 Gig Avis which play fine... wonder how he makes them and if they contain AC3! We will see!

[RedRaider]

According to BlackSun the problem is caused by the Avi splitter that can't handle files larger than 2 GB... I have no clue if this Avi splitter belongs to windows or if every player has to have its own splitter...

[RedRaider]

Originally posted by MaTTeR
So you used the SR map feature to demux the AC3? What if you tried just use normal stream processing and then have DVD2AVI demux the AC3?

It's a guess but maybe SR is doing some strange to the AC3 while demuxing it. I always use the method above and have yet to see any problems, on the other hand I've yet to save anything out over 2GB.

I have demuxed the AC3 part with SmartRipper and DVD2AVI to test if the results are different... both files were excatly the same! I compared them and I don't think it makes a difference which programm you use... I 'm sure now the culprit is the AVI Splitter! Until someone creates a new one or writes a player which does splitting itself you will not be able to play Avis larger than 2048 MB! A workaround could be to create an Ogg Media Stream which contains DivX and AC3! The Ogg Splitter should be able to handle this! But I still have roblems creating an Ogg file... willtest and read around a bit more and the post the results!

[fritzdis]

Originally posted by RedRaider


I 'm sure now the culprit is the AVI Splitter! Until someone creates a new one or writes a player which does splitting itself you will not be able to play Avis larger than 2048 MB!


This only applies to Avis with AC3 audio, right? I have created Avis with MP3 audio whose size is > 2048 MB, and the sync remains correct throughout.

[RedRaider]

I never created such a large AVI with mp3... I had other sync problems with mp3 which made me keep the ac3 and go for 2 or 3 CDs...

[MaTTeR]

Originally posted by fritzdis

This only applies to Avis with AC3 audio, right?
I wouldn't have expected a difference if the issue really is the AVI splitter filter.

[koolK]

i too am having the same prob with > 2 gig file with ac3 sound
has any one found a way around this

[RedRaider]

Rip AC3 Sound (I use SmartRipper), Encode Video (I use VirtualDub), Mux them (I use Nandub) and open the avi with GraphEdit. Use Oggmux filter to create a Ogg Media Stream. Use PowerDivX to playback.

[ookzDVD]

@RedRaider and koolK,

Yes, if you mux the .avi and .ac3 > 2 gb, you will always get
the audio not sync ..... but if you split it to 3x700 mb or
even lower.... it will sync.... trust me!

[RedRaider]

ookz: I know that you can split files but I want an uninterupted film :) The problem is the Avi splitter of Windows. It can't handle files larger than 2 GB. The solution is not to use Avi but to use Ogg Media. Simply download the Ogg Direct Show filters from http://tobias.everwicked.com/ Ogm is a really cool format. It has no problems with files larger than 2 GB and seeking in files is so much faster than in Avi files! If you still have problem creating files larger than 2 GB I'll write a detailed guide if noone else has don so far!

[ookzDVD]

@RedRaider,

Split it use Nandub, it will key accurate 100%,
at least you could save it to CD. ;) ...but if you want to keep it
in your HD.... I think OGM is your solution ;)

PS. I'm been using OGM for 1-CD rip only ;)

[RedRaider]

I split my rips too so I can burn them on cd but I use WinAce for the job. Splitting with Nandub isn't the problem. I just hate it when you notice that your player has finished the first part and now starts the second...

[fANMIR]

Hello.. here are my 2 cents...

Nowadays I enconde movies at fixed quantizer of 2. So many times I get files >2GB. Then I mux video file with ac3 sound using nandub. And my conclusion is:

1. I get perfectly playing divx files with ac3 >2GB ONLY when ac3 stream has no broken frames (checking with ac3fix)

2. If there are broken frames (even fixed with ac3fix) I am getting huge delay of audio in many parts of movie (something like 40 mins)

3. If there are broken frames (even fixed) playing ogm with ac3 freezes player

4. I am using interleave of 128/128 ms

5. If I get only one broken frame demuxing again ac3 from vob sometimes helps

so: divx + ac3 (without broken frames) >2gb plays excellent for me (tested with media player and bsplayer)

sorry for my bad english...

ps. I tested also Avi-mux - It rejects broken ac3 streams..nandub doesn't...

[cult]

ookzDVD is right.When I mux a >2gb avi it gets async,but when I cut it to 3cds(or more),every piece is perfectly synched

[fANMIR]

I have just created 3gb rip of miss congeniality with ac3 sound. And it rocks.. So I am totally confused now....:confused: