Is there a simple way to reassign an audio track in a m2ts from a bluray?

[yoda313]

Ok I have ripped a bluray to movie only and converted the audio to ac3 at 640kpbs. I also wanted to keep the audio commentary. However it came out as the main audio track. I have to manually switch to track two to get the original movie audio.

Its obviously not hard to hit the audio button and switch tracks. But it is a bit of an inconvenience.

Do I have to demux the audio and then remux with the correct order?

The video is the original video from the bluray. I did not reencode it.

Is there some header trick to rewrite the meta data identifying which audio track is number one? Or does this have to be done manually?

I used eacto to convert the dts core that I extracted from the stream folder and then to ac3 640 kpbs. In tsmuxer I left the audio commentary selected and deselected everything else and added the newly minted ac3 640 from the dts core. I didn't realize at the time that the order of the tracks would be fixed upon muxing (the commentary track was included with the video track from the stream folder, I simply unchecked everything except the video and the commentary and added in the reencoded audio at the end of the track list in tsmuxer).

If I have to do this the long way by demuxing then remuxing I can. Fyi I have just deleted the original ripped bluray folder so I'll be working from the muxed m2ts file. Of course I own the bluray naturally so I can re-rip if it would be better. But since I just need to reorder the audio tracks I don't think that is necessary.

Thanks for any assistance if there is some easy insertion tool to change the audio track listing. Maybe some high def version of the old ifoedit program that did neat little background changes without reauthoring a brand new dvd perhaps?

Thanks.


Edit - I know there are some mp4 and mkv tools that are available for demuxing and remuxing. But do they all require individual assets to work with? Can any simply swap the audio? Or do you have to demux the video and the audio to two audio tracks than recombine to a new file?

I know there is mkvtoolbox or mp4toolbox I think but I'm not sure if they work with an m2ts file - and I know about remuxing to a mp4 file but I don't think I want to remux a 25gb file before I even start working on the issue if I don't have to.