[vdr] Re: DVD replay is unsmooth

[s.huelswitt@gmx.de (Stefan Huelswitt)]

On 17 Apr 2002 Andreas Schultz <aschultz@cs.uni-magdeburg.de> wrote:
> On Wednesday 17 April 2002 21:32, Stefan Huelswitt wrote:
>> On 16 Apr 2002 Andreas Schultz <aschultz@cs.uni-magdeburg.de> wrote:
>> >> AC3 dynamic range compression
>> >
>> > i'm no audio specialist, maybe someone else can describe it better,
>> > 'dynamic range compression' is part of the AC3 spec and a feature of
>> > liba52, should be on for normal living room audio equipment.
>>
>> Well, it doesn't makes a audible difference for me.
> 
> it's part of liba52, blame them ;-)

Well, if I understand the docs right, it should be better to
disable dynrng compression for normal living rooms. Don't get
confused by your reverse logic: if the setup option is disabled
(set to no) you are calling a52_dynrng with NULL callback which
in fact disables compression. Right?

>> > nav9 introduces a new way to generate and insert pts for decoded AC3
>> > frames, the options allows one to switch back to the old way
>>
>> "The Abyss" plays much smother with the new syncing, but there
>> are ocassional jumps in the video stream. These are reproduceable
>> (one is right after "Virgill Brickmann is back on air" near to
>> the end of the movie).
>> The chapter change gives a jump most of the time, too.
> 
> this is probably related to jumps in the pts across chapters, at the moment 
> i'm experimenting with disabling pts generation for a moment when those jumps 
> happen, might be in the next patch

One more thing: while DVD playback is much better with the new
syncing method, some (may by all) VDR recordings starts to have
these video jumps with new syncing (and running fine with old
syncing). Seems that the syncing code still needs work ...

-- 
Stefan Huelswitt
huels@iname.com  | http://home.pages.de/~nathan