On Sat, 2007-02-17 at 12:58 -0600, chris clepper wrote:
On 2/17/07, Roman Haefeli reduzierer@yahoo.de wrote:
> The metro is not so hot in Pd either. Good luck. here we go again. we already had a discussion here about that topic without a satisfying conclusion (at least for me). what exactly do you mean by 'not so hot'? is it inaccurate when using it to draw something on the screen? if so, why?Pd's logical time ignores real world 'wall time' and it also queues events. That is fine if you only deal with time inside of Pd, assume that time is perfect and want every event to fire no matter how wrong the time is, but it causes trouble with any media reliant on 'wall time'. Using a metro to drive pix_film will cause the media to drift from reference over time since events are not dropped if they do not arrive on time. The correct handling would drop the event if it did not occur in the proper window and move on thus keeping proper relation to actual time.
ok. but everything you say has nothing to do specifically with [metro], but with the design of pd. [metro] itself is working ok and as expected (like many example patches of frank show).
The original pix_record used Pd's logical time and made recordings with completely wrong timing. After adding internal timers pix_record would properly drop frames and adhere to a wall clock. The windows version still has some problems with timing and will make some Keystone Cops footage if he load is extremely high.
hm. i can see why someone would rather pd/gem have to drop one or the another frame, if cpu-load is too high, when playing a movie-file, instead of playing each frame in order, while losing timing. but why would someone want [pix_record] to drop frames, while recording? i see it as a big advantage of pd, that in a case, where a patch is too heavy in cpu-load, you still could record an audio-file using [writesf~], which might take a longer time than realtime, but you'll have for sure a click-free audio-file as a result. why would someone want to have a different behaviour for video?
roman
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