[MPlayer-users] jerky/jumpy playback of a DVD due to ac3 codec failure

[Yang]

thanks .

yes , the difference is due to which box I run it on. --dumpstream  , or
just mplayer, or -ovc copy are all susceptible to this issue.


hmmm ---- I'll try to compile mplayer from source. but I hate doing that
now , though I used to be a really avid gentoo user and was really into
compiling from source :)



On Tue, Dec 30, 2014 at 2:20 PM, Reimar Döffinger <Reimar.Doeffinger at gmx.de>
wrote:

> On Mon, Dec 29, 2014 at 10:55:30PM -0800, Yang wrote:
> > I play a DVD with ac3 audio on 2 computers, both using mplayer, same
> > version.
>
> Also same version of libavformat, libavcodec etc.?
>
> > on the laptop, it works fine. on both systems, totem/vlc/xine play fine
> too.
> >
> > on the desktop, it's very jerky/jumpy, and the video is terribly
> pixelated,
> > mostly dark beyond recognition.
>
> Didn't you say before this happens depending on which PC you ran
> -dumpstream on?
> In which case something might have gone wrong with the decryption.
>
> > I closely compared the log from both sessions, and found that the desktop
> > mplayer seems to have issues with audio decoder:
> >
> > Selected video codec: MPEG-2 video [libavcodec]
> > [ac3 @ 0x7fb292a19a20]frame sync error
> > [ac3 @ 0x7fb292a19a20]frame CRC mismatch
> > [AVAudioResampleContext @ 0x7fb291ae0d60]Value 0.000000 for parameter
> > 'in_sample_rate' out of range
> > [AVAudioResampleContext @ 0x7fb291ae0d60]Value 0.000000 for parameter
> > 'out_sample_rate' out of range
> > Audio decoder did not specify audio format!
> > Audio decoder init failed for codecs.conf entry "ffac3".
> > Selected audio codec: AC3-liba52 [liba52]
> > AUDIO: 48000 Hz, 2 ch, floatle, 384.0 kbit/12.50% (ratio: 48000->384000)
> > AO: [pulse] 48000Hz 2ch floatle (4 bytes per sample)
> > Starting playback...
> > [mpeg2video @ 0x7fb292a19a20]Warning MVs not available
>
> Audio and video if anything. But rather it's simply that the data it
> gets is broken/corrupted.
>
> > I tried to force --ac=ffac3 or --ac=lavc, but it still fails to init the
> > dictated codec
>
> Those aren't options MPlayer would accept, the help we can offer when
> you are using a fork is extremely limited.
> If you upload a sample file we can test if it works for us with MPlayer
> compiled from latest SVN, but that is about as much as I can help.
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