[MPlayer-dev-eng] Bluray input with -demuxer lavf

[Reimar Döffinger]

On Wed, Sep 17, 2014 at 07:42:39PM +0200, Reimar Döffinger wrote:
> On Sun, Sep 14, 2014 at 09:34:48PM +0100, Andy Furniss wrote:
> > Grozdan wrote:
> > >Hi,
> > >
> > >I've noticed a problem when using Blu-ray input together with demuxer
> > >lavf. The MPlayer cmd is as follows
> > >
> > >mplayer br:// -bluray-device disc.br -vo null -vc dummy -demuxer lavf -frames 1
> > >
> > >The problem is that MPlayer does not stop after reading one frame
> > >(-frames 1) but goes on to read the *full* Blu-ray, until the end. You
> > >can imagine doing this on a 30-50GB bluray input. It trashes the disk
> > >until it reaches the end of the BD
> > >
> > >The same goes if you use something simple as: mplayer br://
> > >-bluray-device disc.br -demuxer lavf
> > >
> > >I've tried to get it work but was not able to do it. The only option
> > >is to omit -demuxer lavf which then "works" but the terminal gets
> > >spammed with error messages and playback is virtually impossible!
> > 
> > Hmm, so it does - there is a workaround though -
> > 
> > -cache 20000 "fixes" -demuxer lavf for me testing with an encrypted disc
> > dumped on HD (for which I have the vuk of course).
> 
> I think there are at least 2 bugs :(.
> MPlayer asks bd_seek to seek to a completely nonsense position:
> s->pos=548000  newpos=7F94F8105800  new_bufpos=7F94F8106179  buflen=0 
> However instead of either seeking to EOF or returning an error, bd_seek
> just does nothing.
> The bd_seek documentation unfortunately says nothing at all about what
> happens for errors.

I fixed a good bunch of issues, hopefully all this works more reasonably
now.