[MPlayer-dev-eng] Ac3 streams detected as LPCM or SPU in TS

[Nico Sabbi]

MichaelM wrote:

> Coolness!
> I've tested the patch with as many ac3 streams I have available. With 
> a tsprobe parameter of 50000000, the ac3 streams are detected, and 
> played back.
>

did you grab them from DVB-T ?
Can you upload some more sample in incoming please? Possibly a couple of 
minutes long ;)

> I have encountered numerous sync issues, but at the moment I'll assume 
> its my computers fault. 




> Most of the sync issues are gone when I capture the stream to disk and 
> then playback.
> There are a few a52 crc errors, like so:
>   a52: CRC check failed!   -0.054 ct: -0.348  727/727  27% 33%  3.3% 0 
> 0   0%
>   a52: error at resampling
>

there seem to be many reception errors in channel9hdtv.ts: if you run
$ ts2es channel9hdtv.ts 650 > audio.ac3
then
$ a52dec audio.ac3
or
$ mplayer -rawaudio on:format=0x2000 audio.ac3
you will see the same messages.



> Also, occasionally this error occurs, during which video slows down, 
> and then audio playback ceases, with video resuming:
>   Too many video packets in the buffer: (11 in 8432596 bytes).
>   Maybe you are playing a non-interleaved stream/file or the codec 
> failed?
>   For AVI files, try to force non-interleaved mode with the -ni option.
>
> Again, most of these errors may be my systems fault (Athlon XP 2.3GHz, 
> with a radeon9500, using the xfree86 drivers).
>

maybe it's too slow: even my p4 2.6 isn't fast enough to play that 
resolution, and obviously it loses sync

> BTW, I haven't  really played around with the tsprobe parameter, so 
> its likely that a smaller value will work. 50000000 works, but it is 
> somewhat slow.
>
>

yes, I'm thinking of a faster and safer  method.

        Nico