unable to extract ac3

[wellyman]

Hey all:
1st time I've seen this one. Thought I'd run it past you audio buffs since no one else seems to know anything. Trying to demux the ac3 from the movie 'The man with the golden gun', james bond. It has two audio tracks, one 2 ch. dd which is mapped to 0x80. It also has a track that is 0x81 that is unspecified. I've tried ripping with smartripper, and dvd2avi. It rips fine, but when i try to fix the delay, it says its corrupt. I've tried just reauthoring, and about 2/3 through movie, audio goes dead. I can play the ripped vobs with the orig. ifo with powerdvd, and it plays fine. Just can't seem to get the audio. Any ideas?

[MaTTeR]

Stream processing with SmartRipper should work. If not, try selcting the AC3 stream and having SR demux to an extra file.

[wellyman]

SR doesn't work. I typically do demux the ac3 with SR, but it doesn't work on this movie.

[Hanty]

Well, I'll echo Doom9 on what he says about those times when all else fails. Use vstrip, it should be able to rip any known DVD in existance.

[Acaila]

Have you tried the AC3Fix utility which can fix corrupted AC3's?

[wellyman]

well, still no success. I've tried v-strip, and still it doesn't work. First half of the movie is fine, but after that, async and then no audio. I've attached ascreen capture of vstrip with this movie. Any help is cherished.

[Andrew Mifsud]

I'm having a similar problem. At around 1:18 into the film, there's a read violation that blocks all progress on video and audio.
Could it be that the IFO has some deliberately misleading information on it?

[DSPguru]

you can try using DVD Decrypter, or even.. BeSweet :
download the vobinput plugin from my webpage, and use the commandline :
BeSweet.exe -core( -input whatever.vob -output whatever.ac3 -substream 0x80 -payload -logfile BeSweet.log )

if you're having a problem with your ac3 stream, you could try fixing it with BeSplit.

[candyman_eu]

I have the same problem now on two movies. Contrary to Smartripper, I always use DVD2AVI to create me the AC3 file. Also here it fails saying me that the AC3 track is corrupt. Luckily it's in the first 30secs so muxing it back and playing back is fine but I also had a movie (Planet of the Apes) which plays fine fully on the PC but on my standalone, sound turns off about 1 hour into the movie. I haven't been able to fix this as of yet. So any AC3 fix tool would be great.

[DSPguru]

Originally posted by DSPguru
if you're having a problem with your ac3 stream, you could try fixing it with BeSplit.