[MPlayer-dvb] DVB Playback Issues

[Derek Ivey]

Hi Bill,

Yeah I do have ffac3, but it only works sometimes. When it doesn't work 
I get those frame CRC mismatches and get_buffer() failed.
This problem seems to occur on all of my channels. They will work and 
then if I CTRL C and try launching them again I usually have problems.

I tried your config and it didn't seem to help unfortunately. I noticed 
that the video playback was slow and out of sync with the audio.

I am using cable TV (clear QAM). I believe the signals are fine because 
my tuner has a indicator light that is green when the signal is strong 
and orange when it is a weaker signal. The light was green. I agree that 
this is probably an audio codec issue. If I run mplayer with -nosound 
the video playback is perfect.

I'll keep searching for solutions. Thanks for your help so far!

Derek

On 12/19/2011 7:54 PM, Bill Pringlemeir wrote:
> On 19 Dec 2011, divey at versatile.com wrote:
>
>> Thanks for taking the time to write that very thorough response. I tried
> your
>>      suggestions and I'm still having issues. I compiled liba52 and
>>      recompiled mplayer. I also noticed that I was missing my
>>      /etc/mplayer/codecs.conf file, so I copied it from the source.
>> Here are some of the commands I ran and their output.
> Some of the errors look familiar.  I think I tried liba52 for some time
> and then I was hinted to use '-ac ffac3'.  Do you have that codec?  I
> have these entries in ~/.mplayer/config
>
>     # Drop frames to sync A/V
>     framedrop=yes
>
>     # Add a cache to smooth playback.
>     cache=4096
>     # start when 5% full.
>     #cache-min=10
>     cache-min=25
>
>     # No software scaling.
>     zoom=no
>
>     # Use alsa drivers.
>     ao=alsa
>     ac=ffac3,
>
>     # Don't change video out.
>     fixed-vo=yes
>
>     #Allow OSD menus
>     menu=yes
>
> Here is mplayer playing a captured stream on my PC,
>
> $ mplayer.wrapper sample.ts
> MPlayer SVN-r34448-4.6.2 (C) 2000-2011 MPlayer Team
>
> Playing sample.ts.
> Cache fill:  0.00% (0 bytes)
>
> TS file format detected.
> VIDEO MPEG2(pid=33) AUDIO A52(pid=36) NO SUBS (yet)!  PROGRAM N. 2
> VIDEO:  MPEG2  1920x1080  (aspect 3)  29.970 fps  65000.0 kbps (8125.0
> kbyte/s)
> Load subtitles in ./
> ==========================================================================
> Trying to force video codec driver family libmpeg2...
> Opening video decoder: [libmpeg2] libmpeg2 MPEG 1/2 Video decoder
> Selected video codec: [mpeg12] vfm: libmpeg2 (MPEG-1 or 2 (libmpeg2))
> ==========================================================================
> ==========================================================================
> Forced audio codec: ffac3
> Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
> AUDIO: 48000 Hz, 2 ch, s16le, 384.0 kbit/25.00% (ratio: 48000->192000)
> Selected audio codec: [ffac3] afm: ffmpeg (FFmpeg AC-3)
> ==========================================================================
> AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
> Starting playback...
> Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
> VO: [xv] 1920x1080 =>  1920x1080 Planar YV12  [fs]
> A:48851.1 V:48851.5 A-V: -0.371 ct: -0.174  60/ 60 48%  5%  1.4% 8 0 50%
>
> Note, the comma suggests 'ffac3'.  Is it just this channel that has
> strange sound or do you only get a few channels?  Are you using an
> antenna?  Is the station farther away than other stations?
>
> My system has an older Nvidia card and is a 2.4GHz Celeron.  I can play
> lots of different channels without any skipping.  However, Nvidia didn't
> port the 'vdpau' to my graphics card.  I just use '-vo xv'.  You might
> try this to see if 'vdpau' is having some sort of issues.
>
> I did have problems with video playback when my CPU fan was
> malfunctioning and it was 'thermal throttling' without any kind of
> notice.  You might get 'lmsensors' package to verify that everything is
> working perfectly with your system, but I think it is the audio codec in
> your case.
>
> Hth,
> Bill Pringlemeir.
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