[MEncoder-users] AV sync

[James Hastings-Trew]

Greg Heywood wrote:
> On 22/09/2007, James Hastings-Trew <jimht at shaw.ca> wrote:
>   
>> Mencoder maintains a/v sync by dropping or duplicating frames, usually
>> at the boundaries of black frames so as not to cause visible stutter.
>> Try getting rid of the vf=harddup=1 option in your profile and see if
>> sync improves. This is just a guess on my part as to something to try.
>>
>> Thanks. Tried that, and also tried the following (with and without the
>> harddup option).
>>
>> [ivtv2]
>> tv=norm=0:device=/dev/video0:width=720:height=576
>> pvr=abitrate=192:vbitrate=2200000:vpeak=2600000:fmt=ps:aspect=2:arate=32000
>> ofps=25
>> ovc=copy=1
>> oac=copy=1
>> vf=harddup=1
>>     
What kind of sync problem are you having? Does it start out wrong and 
stay wrong at a constant value, or does it start out right and drift 
wrong after a while?