Extra audio channel (bug?) / iPod touch

[astrand]

I believe I have found a bug but want to validate before posting. The problem is related to 0.8.6, 0.9 and the nightly builds.

Proposed defect
After converting, QuickTime tells me there are two audio tracks (via the Window -> Show Movie Properties menu). One is N/A and the other has my content. Since I cannot get VLC to stop generating the extra track I want to validate this is a bug before posting.

VLC Exceution string

Code: Select all

vlc -vvv dvd://D:@1:1 :sout="#transcode{vcodec=h264,vb=1500,acodec=mp4a,samplerate=44100,ab=160,channels=2,height=360,canvas-height=480}:std{access=file,mux=mp4,dst=C:\TEMP\Test.mov}"

Problem manifestation
If I try and import the VLC generated file into iPod touch it won't recognize it. I have used the data from http://wiki.videolan.org/IPod and believe all should work. If I regenerate the file with QuickTime Player the problem goes away. I checked the VLC output data and QuickTime Player output data via QuickTime Player. The basic video/audio size and bit rates for both files are similar and in the iPod Touch stated acceptable range.

Questions

• Has anybody seen the duplicate audio track problem?
• Any suggestions that I can do to remove the extra track?
• Any other suggestions about how to get the movie to import to the iPod touch?

Note
In addition to the above versions 0.9x and nightly builds will skip the canvas size as per my execution arguments.

[Jean-Baptiste Kempf]

Does your DVD have 2 tracks?

[astrand]

That is a good catch.

The DVD has 14 streams:

• 8 Codec SPU
• 2 Codec mpgv
• 4 Codec a52 (2 English; 2 Spanish)

The conversion appears to be throwing out the data but not the track. My current theory is that this extra track is causing the iPod to reject the h246 encoded file.

If that is the problem is there a way to specifically discard the track/stream during conversion.

Thanks.

[Jean-Baptiste Kempf]

Hmm, I think you can do that with the select stream output module, but I don't remember.