Convert Iron Man BD to MP4 using RipBot - Audio Channel Issue

[csilvest]

Hi All.

Having a weird recurring problem. I've successfully ripped Iron Man Blue Ray to my Hard drive. I've verified this by playing it with a Blue Ray capable player, and everything plays back as if from the original disc.

So now I fire up Ripbot264v1.12 to convert to MP4. It pretty much works as advertised, producing good video and perfectly in-sync Audio, but...

...Center channel material, such as voices, etc., are coming out of both the center channel and the left channel, and the sounds are louder out of the left channel. I tried two diferent audio profiles, 5.1 CT AAC-LC 256 kbps, and the 320 kpbs as well - same result both times. I play back the ripped files instead to double check, and the audio is as it should be there. So something is definitely happening during the Ripbot process.

Any ideas what might cause this sort of behaviour? I installed all the required supporting programs for Ripbot. I am running on Vista Utlimate 64 bit if that matters...

Any suggestions to point me in the right direction would be appreciated.

[redwudz]

What I've done is run a ripped BD file through tsMuxeR and chose only the main movie and the preferred audio track. Then 'Start muxing'. When you open the muxed file in RipBot, it should only be able to access the selected tracks. I converted Iorn Man that way and no playback problems with the resulting MKV file.

[csilvest]

It doesn't seem like the wrong audio track is being selected - it seems more like something is amiss in the processing. Why would an audio track be there on the original with voices coming out of the left channel all the time?

Don't get me wrong, I'm willing to try the extra TSMuxer step, but this thing already takes over 18 hours to encode on what I thought was my decent system (guess I need to step up to quad core).

[poisondeathray]

If the converted video is fine, you don't have to waste 18 hours doing it again

You can use eac3to to do just the audio and put it into the .mp4 container later

If the channels are wrong for that track for some reason, you can do custom channel mapping with eac3to as well

[csilvest]

poisondeathray, I considered that - can I just lay another audio track on top of the existing bad one? Or would it be an extract and remux operation into a new mp4 file?

I'm willing to do whatever it takes to get the final good result, I just had high hopes for RipBot being the easy solution. And it seems like it's so close to being that. I was hoping there was some adjustment or tweak I could make to get that to go.

Thanks, and will give eac3to a try later.

[poisondeathray]

No use keeping the "bad" audio track. You can use mp4box (YAMB is the GUI for it) to keep the good video and put in the new audio

There are frequent revisions, to ripbot and many of the backend programs that it uses. Sometimes things get broken , sometimes fixed. eac3to is actually one of the program it uses, but that gets updated almost once a week.