remux problem?

[tinyrodent]

I'm trying to use IfoEdit to backup the main feature of "Sonic Youth - Corporate Ghost" on DVD5. The video is just fine as is, but the audio track is 24-bit 48KHz LPCM - very wasteful, almost 2GB in size. A lot of tools don't seem to like this format. But I successfully transcoded to 16-bit 48KHz AC3 using SSRC and BeSweet.

Now I just want to create a DVD5 using the original video, and the AC3 audio track. This is a simple operation in IfoEdit and everything seems to work properly up to and including the "DVD Play" feature of IfoEdit.

However when I try to play the generated files using my regular DVD player app (ASUSDVD), there is no sound and the video moves very very slowly (like 1fps or something).

Any ideas what I have done wrong?

[2COOL]

I see you just want a movie only backup. Try using MuxMan (http://www.mpucoder.com/Muxman/) for muxing your streams. It should be a lot more reliable.

[EDIT] Also, I suggest you look into BeLight (http://forum.doom9.org/showthread.php?t=85566&highlight=belight). It uses BeSweet also and it's a way better user friendly GUI. ;)

[tinyrodent]

It worked! I guess it's just a matter of trying every tool in the book. But it gets rather frustrating... thanks again.

[2COOL]

:cool:

[tinyrodent]

It appears I spoke too soon... MuxMan worked on the first try but then I realized that I left out the chapter info. So I ran it again, importing the CellTimes.txt file created by IfoEdit. But the resulting title doesn't play correctly, just the same as when I authored with IfoEdit.

Then after many more experiments, I tried to run MuxMan again exactly the same way as the first time. But something must be different... because even without the chapter info, I STILL get the same damn symptoms of no audio, and super slow video.

I tried another DVD player (Nero Showtime) and it doesn't work properly with this title either. But both players work fine with the full sized original title.

I am baffled as to what's going on.

[2COOL]

Out of curiousity...what happens if you do a mock strip (http://forum.doom9.org/showthread.php?s=&threadid=84097) after using muxman?

[tinyrodent]

Ok I started into the mock strip thing and got fairly confused. But then I stepped back and looked at the problem from another angle. After a bit more testing I have established for certain that this has nothing to do with the IFO files. I have deleted them for now until I figure out what's going on.

I can use the VOB file play function in my DVD player app and normally it works fine (this is without any IFO). But with these remuxed VOBs, it gives me the same weird behavior of very slow playback and no audio.

I tried opening the VOBs with VobEdit, and in that application's preview mode the video plays back properly. So - what could be wrong with VOBs and how can I fix it?

[2COOL]

It appears I spoke too soon... MuxMan worked on the first try but then I realized that I left out the chapter info. So I ran it again, importing the CellTimes.txt file created by IfoEdit. But the resulting title doesn't play correctly, just the same as when I authored with IfoEdit.

Then after many more experiments, I tried to run MuxMan again exactly the same way as the first time. But something must be different... because even without the chapter info, I STILL get the same damn symptoms of no audio, and super slow video. If MuxMan didn't work for you, I'm sure mpucoder would like to know if there is a bug or not. He's pretty good at getting down to the bit level, especially since it's his app.

[lark]

just makes me wonder, if there's something wrong in the AC3?
have you tried to mux some totally different audio to the DVD?
on the other hand, how did you demux the m2v?

regards
t :)

[tinyrodent]

Honestly I don't even remember what I used to demux to m2v, maybe DGIndex? I tried a couple things before I found one that worked. I never had to do this before and I hope never again... but just in case I do.... what is the "recommended" tool for this job? As for the AC3... I'm pretty sure it's ok, it plays back fine in WinAmp and also as mentioned in VobEdit preview.

[mpucoder]

I suspect the problem is the audio. I have heard of people having problems using BeSweet to make ac3 for DVD. And another trouble report against MuxMan turned out to be crc errors in the audio (which MuxMan does not check). If I could have a sample of the audio I could tell more, and maybe devise a test to analyse the problem in MuxMan and save other users from this ordeal.

[tinyrodent]

What do you want in terms of a "sample"? I don't have the bandwidth to upload a large file. Also what tool would you recommend for transcoding if not BeSweet/SSRC?

[tinyrodent]

Ok going on the suspicion that something is wrong with the audio... I tried MuxMan with the transcoded 16-bit WAV instead of the AC3 which I made from it. It would be too large for DVD5 but maybe it's a useful experiment.

This time, the resulting VOBs play just fine with or without the accompanying IFOs. So it appears that something is objectionable about the AC3 although both VobEdit and WinAmp don't complain.

Again what is the recommended tool to convert from WAV to AC3?

[sweetness]

tinyrodent, try using delaycut (http://www.videohelp.com/~jsoto/audiotools.htm) to fix the crc. just input the file, output and have crc set to fix.
this might not help mpucoder but it might help you.

[tinyrodent]

Apparently it's not a CRC problem. At least delaycut didn't find any errors. Here is its output:

[Input info]
Bitrate=384
Actual rate=384.000000
Sampling Frec=48000
TotalFrames=194197
Bytesperframe=1536.0000
Filesize=298286592
FrameDuration= 32.0000
Framespersecond= 31.2500
Duration=01:43:34.304
Channels mode=2/0: L+R
LFE=LFE: Not present
[Target info]
StartFrame=0
EndFrame=194196
NotFixedDelay= 0.0000
Duration=01:43:34.304
====== PROCESSING LOG ======================
Number of written frames = 194197
Number of Errors= 0

[2COOL]

I've done some WAV to AC3 a couple weeks ago and the method I used was PgcDemux (http://www.videohelp.com/~jsoto/dvdtools.htm) for demuxing and BeLight (http://forum.doom9.org/showthread.php?t=85566&highlight=belight) for converting. I didn't get any problems on playback.