[MPlayer-users] Subject: rc5 audio tests w/ surround 5.1 + 6 channels + alsa 0.9.2
hmf at netvisao.pt
Sat Apr 5 12:31:01 CEST 2003
I have some additional information: whilst perusing the liba52 mailing list I
found an interesting response. One of the correspondents (looked like a
developer) said that the AC-3 is encoded with what is equivalent to a 31+
frame rate. This seems to agree with my experience. Sound always moves ahead
of the video, and does this continuously.
This does not explain why:
1. When downmixing, the sound is synced,
2. When jumping backwards and forwards, the channels seem to switch to the
Vladimir, and anyone else, is there a way to substitute the current A52
decoder with another one? I would like to do this to confirm that liba52
decoding could be the culprit.
On Thursday 03 April 2003 08:18 pm, Hugo Ferreira wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Thanks for the feedback. I have used alsa's utilities to output AC3 to 6
> channels and it seems works ok. I will have to make a few more tests to
> shed some light on this.
> Will get back to the list, if and when I have found out more.
> BTW , was this discussed in the developers list?
> On Tuesday 01 April 2003 02:45 pm, Vladimir I. Umnov wrote:
> > [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> > Hello, Hugo.
> > HF> [Automatic answer: RTFM (read DOCS, FAQ), also read
> > DOCS/bugreports.html] HF> Hi,
> > HF> Just a quick update. I have noticed that if I play a DVD with the 5.1
> > options HF> and the center output is not in the center speaker, I can
> > repeatedly step HF> backwards and forward with the arrow keys and finally
> > get audio output in the HF> center.
> > HF> Seems like a bug. How may I diagnose this problem further?
> > This bug was reported earlier. But developers can't determine: bug in
> > alsa or bug in mplayer, or they don't work on this problem.
> > p.s. I found this bug in ac3filter for wnd, but channels swapped not
> > in ide working moment, it swapped after pause. Maybe bug in a52 lib.
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