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On 06/25/2011 09:50 PM, Dan Dennedy wrote:
> On Fri, Jun 24, 2011 at 6:00 AM, Till Theato <[email protected]> wrote:
> Hi,
> I have an issues with the new frame dropping method introduced in commit
> 5d971b0c208aa17fd4e159a329cd0304558ec140:
> Clip 2 follows clip 1 on one track. Clip 2 has an in value > 0. During
> playback with real_time=1 there is very little dropping while on clip 1.
> However when it reaches the beginning of clip 2 it has to seek and if
> clip 2 is highly compressed this takes a while. Therefore massive
> frame-droppings set in lasting for quite some time. When playback is
> 
>> I reproduced it just fine. Please test my recent commit where I try to
>> address this.

Thanks for the quick fix! Works fine now.

> 
> started a bit after the beginning of clip 2 this doesn't happen.
> In a project with a lot of short clips only every 15th to 20th frame is
> shown. Maybe it would be possible to optionally set an upper limit for
> the number of dropped frames?
> 
>> Sure, it could be possible, but I would rather have it behaving well
>> rather than potentially ask the user to adjust something. Before the
>> changes, it was not behaving well in the sense that audio was not
>> continuous under what I consider even moderate loads. Now it does,
>> except still not some very heavy loads, and I exposed this edge case
>> you found. I do not yet claim all edge cases are resolved, but I hope
>> that it is better overall for the 80% of workloads where you want
>> frame-dropping. Let me know what you think of the results.

In my quick tests it performed pretty well. Of course the number of
dropped frames was huge when playing back a project with short files
from a Canon DSLR with color grading applied but I guess there is no
proper way to go in this case.
If I find another corner case I will report back.
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