converting (AAC to AC3) files with multiple audio tracks (multiAVCHD)

[mpholic]

I typically convert a .mp4 video with a AAC (6ch) audio to a .m2ts with AC3 (6ch) audio. Using multiAVCHD/eac3to I have been very succesful, even reordering the audio channels. This usually takes less than 10 minutes as there is no need to transcode the video.

Recently I have come across two seperate videos with multiple audio tracks, one 2 channel and one 6 channel. In both cases eac3to fails (as reported by the log screen) to do the conversion on the 6 channel audio track. I end up with a file containing a single 2 channel AC3 audio track.

I am not interested in retaining the 2 channel audio track so I have tried to remove the 2 channel track by selecting it in the extended properties screen, pressing the remove button (the 2 channel listing disappears) and proceeding from there. The log screen lists only the 6 channel track for conversion and it seems like it is going to work but a few minutes later it reports eac3to fails in the same spot as before.

I have tried it with both tracks, with the 2 channel track removed (as per the extended properties page), with the 6 channel track moved to the top of the listing and anything else I could think of.

As I stated earlier I can do this with no problem on a file containing a single 6 channel track with no problem. it appears to be the extra audio track creating the problem.

Thanks

[setarip_old]

1) Load the file into tsMuxeR, remove the 2 channel audiostream and save as .M2TS

2) Load the .M2TS into multiAVCHD and process as you normally do

[mpholic]

I tried that and tsmuxer reports both audio tracks as 2 channel but mediainfo and multiAVCHD shows one 2ch and one 6ch.

I tried it anyway and I still end up with a m2ts file with one 2 ch track.

??

Thanks

[setarip_old]

Recently I have come across two seperate videos with multiple audio tracks, one 2 channel and one 6 channel.

1) What are the titles and regions of your original, commercial (presumably) Blu-ray discs that you used as the sources for creating these two problematic videos?

2) What software and procedures did you use to create these two videos?

[Capsbackup]

It is probably a corrupt 6 ch track. You could try to reencode the 6 ch track to a new 6 ch track, keeping the bitrate the same, then try to use this newly reencoded 6 ch track.

[mpholic]

Crank and Crank High Voltage Region 1

I never thought about the 6ch track being bad. I'll start from scratch and see if I screwed it up the first go around.

Thanks

[setarip_old]

Why would you bother first converting your two original, commercial Blu-ray discs to .MP4 with .AAC audio - and then RE-convert them to (Blu-ray-compliant) .M2Ts with .AC3 audio? Why wouldn't you simply backup your original Blu-ray discs?

BTW - Of course you know that one of the "Crank" Blu-rays has a 7.1 DTS HD (MA) audiotrack, while the other contains a 6.1 PCM audiotrack