dvd with multiple screens / angles won't time seek / jump ?

[cybmole]

I have two specific DVDs for which all seek / jump controls appear disabled. if I e.g. hit my hot key for 10 secs jump the video seems to try to obey but immediately reverts to its previous position. the go-to specific timestamp command does not work either.

at first I thought it was a prohibited operations setting in DVD IFo, but when I test with powerdvd I have full control

so I now suspect it is because the DVD is using a split screen playback trick i.e. it's running two syncnhronised videos at once- you see the guitar player in top section of screen, and scrolling guitar tab in lower section of screen.
and that VLC cannot jump / seek on two feeds at once - would that make sense and is there any workaround.

NB within the dvd format there are mulitple files for each title set- if I load it into DVD fab I see many titles with suffixes (1), (2) etc.

the dvd is guiar play-along vol 16 pink floyd dark side of moon

I also have a John McLaughlin dvd set ( that's the way I do it box set ) which uses similar split screen techniques- that also will not time skip / jump in VLC. in that instance there are 3 video panels running on screen showing player left hand, player right hand, and scrolling guitar tab. I was able to rip some of this to video, ages ago, & get a single .avi with all 3 screens combined, but as I recall I had to try more than 1 DVD ripper to find one that could cope with the layout.

there must be other educational DVD material out there using similar techniques

[VLC_help]

Multiangle or multivideotrack files are problematic for VLC. Tools -> Messages (set Verbosity to 2) before playback and it should complain something when you try to seek.