Problem Exporting VOB to MP4 or MOV with no transcoding

[grayner]

I am trying to transcode VOB files to MP4 or MOV format without recompressing (Just using the different transport container so I don't lose any quality during the recompression process).

I am using VLC 0.8.5 (Intel build) and MAC OSX 10.4.8.

I have tried several exports from various VOB files that play OK in VLC. When I use the 'Streaming/Exporting' wizard, I first make sure that neither the video nor audio codec recode check boxes are selected in the "Transcode" options (to avoid recompressing). I then select "MP4 / MPEG 4" as my "Encapsulation format" options (have tried MOV too), then follow the prompts to output the file.

At that point I get an error popup that is titled "Error" with the words "An error has occurred which probably prevented the proper execution of the program:". A white text box below that text reads:
mux_mp4: unsupported codec a52 in mp4
main: cannot add this stream
mux_mp4: unsupported codec a52 in mp4
main: cannot add this stream

I have tried many combinations and permutations. I can get it to export if I select recoding (in the transcode options window) for both audio and video to a different format, but that obviously defeats my quality goals.

Is this a bug? If not, what am I doing wrong? Is there a workaround to do what I want to do?

Gary.

[funman]

it just means that you can't put a52 audio (used on dvds) in mp4 container

more info on: http://www.videolan.org/doc/streaming-h ... /ch03.html

[The DJ]

so you have to transcode the audio to another format