[MPlayer-users] Re: Re: Cache doesn't refill

[Nico Sabbi]

Stefan Seyfried wrote:

>On Fri, Jun 11, 2004 at 06:59:08PM +1000, Adam Nielsen wrote:
>  
>
>>>MPlayer syncs video to the clock of the soundcard IIRC. If your
>>>soundcard is a bit too fast, your cache will run out sooner or later
>>>since the broadcast comes in with a steady framerate. It is well known
>>>that soundcards are pretty bad wrt their clock accuracy.
>>>      
>>>
>>This should be pretty easy to test: mplayer -nosound.  If there are no
>>cache underruns, it's definitely the sound card.
>>    
>>
>
>not really. IIUC, mplayer -nosound is "free-wheeling" the video, based on
>rtc. But you cannot be sure that your RTC is the same as that of the
>broadcaster. You basically need to check if your cache is filling up or
>draining out slowly and adjust your playback speed (by resampling sound
>for example) to keep sync over a long time.
>VLC does this IIRC.
>  
>

if only mplayer did sync to a master clock we could use the PCR :)
In any case with -nosound and using the RTC there are no problems:
yesterday I let mplayer play for hours without any underrun.

    Nico