[MPlayer-users] pulseaudio failing at passthrough

Alexander Roalter alex at roalter.it
Fri Feb 14 22:47:03 CET 2014

On 14.02.2014 22:35, Reimar Döffinger wrote:
> On Fri, Feb 14, 2014 at 10:11:27PM +0100, Reimar Döffinger wrote:
>> On Fri, Feb 14, 2014 at 08:32:04PM +0100, Alexander Roalter wrote:
>>> On 14.02.2014 20:14, Reimar Döffinger wrote:
>>>> On Fri, Feb 14, 2014 at 08:11:03PM +0100, Reimar Döffinger wrote:
>>>>> On Thu, Feb 13, 2014 at 10:52:50PM +0100, Alexander Roalter wrote:
>>>>>> If I play back AC3 audio with ao pulse and S/PDIF passthrough, I get
>>>>> Passthrough with pulseaudio is a mess, it requires us to use a new API,
>>>>> which means either detecting if it is available or dropping support
>>>>> for old versions
>>>> I just realized that passthrough in pulseaudio was only added last year,
>>>> so removing support for old versions definitely isn't an option.
>>>> Also, unless I can get passthrough to work on my system (didn't work out
>>>> so far) I definitely won't be working on this.
>>> Thanks for the info about this.
>>> I would happily switch back to alsa, if it weren't for the strage
>>> reinitialization thing it does whenever I seek,
>> That is probably your hardware and unavoidable. Kind of.

I guess so. Interestingly, if I seek, it detects PCM for a short time 
before reverting to AC3, so it looks like something crappy is sent along 
the optical link cable that doesn't look like AC3 at all. Or when I 
press Q or hit the enter key to finish playback.

>>> and the thing dvdnav
>>> does on chapter break.
>> That is because the dvdnav code is, if I speak my mind honestly,
>> a bug-riddled obfuscated piece of crap with no documentation
>> that would allow to figure out whether there is some sense behind
>> the obviously nonsense pieces of code or if they should just
>> be removed...
>> I think if you do this change below this will avoid the issue, but it
>> may or may not break something else.
Whoa, do I sense some animosity against this library? I understand it is 
a big mess, and I still have some discs that don’t play along well with 
it, but it currently is the only way of playing most of the copy 
protected discs (mostly older (i.e. 2006-2012) Sony and recent 
Paramount), where dvd:// simply gets stuck on corrupted sectors and such 
stuff. And with some Disney and Paramount discs, where I use dvdnav to 
find the correct title (because there will be 99 titles, and most of 
them with the same length, but all with different chapter numbering…).

> I actually committed a variant that I think is relatively low-risk and
> should avoid the issue.
Yes, no more silence on chapter breaks. Thanks!


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