[linux-audio-dev] best option for audiovisual synchrony

[Tim Goetze]

[Fons Adriaensen]
>Input the vertical video sync signal via the audio card and analyse
>its timing in terms of audio samples (e.g. using a DLL). This will
>enable you to predict where the next sync will be in the audio input.

Back in the 80s, the humble Commodore 64 could be readily programmed 
to fire an interrupt on vertical sync.  Have 20 years of progress 
really deprived us of this fine feature, or is it just missing from X?

Cheers, Tim