[MPlayer-dev-eng] [PATCH] Online audio stream switching

Joey Parrish joey at nicewarrior.org
Mon Feb 28 19:31:13 CET 2005

On Mon, Feb 28, 2005 at 10:37:53AM -0500, D Richard Felker III wrote:
> > > A single keypress will make it horribly crash unless the new audio
> > > track has exactly the same codec and format as the old one. This is
> > > very bad. Consider DVDs that have some tracks as 2.0 AC3 and others as
> > > 5.1 AC3, or a mix of AC3, PCM, and DTS. Unless you work out all the
> > > mess to close down and reinitialize the audio layer for the newly
> > > selected audio track, a patch like this (which only works on a very
> > > limited number of files and crashes on all the rest) is not
> > > acceptable. I know it's very hard to do this right (that's why no one
> > > has done it yet..) but that's the way it is. Sorry..

> > Well, the patch already knows about the difference between AC3, PCM and DTS
> > and switches only between streams of the same format. Switching
> > between 2.0 AC3 and 5.1 AC3 did not make problems here but please
> > send me a sample where it does.

> do you have a 5.1 setup? if not, it will just decode both as 2.0 so no
> problem should arise...but i wonder what happens if you have 5.1
> output available..

Well, if it checks the format to ensure no crashing, I say it's a very
good thing to have.  What's the down side when compared to no switching
at all?


"I eat donuts for dying children." --Andrew

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