[Cin] Speed line

Sam cinelerra at posteo.de
Sun Jun 14 23:10:45 CEST 2020

Am 14.06.20 um 22:57 schrieb Rafa Mar Multimedia en Gnu\Linux:
> I don't know why it happens, but I know how to solve it, let's see if 
> I can explain it to you with a video.
> https://streamable.com/jzw3i5

Thanks for the advice Rafa. In fact, this advice helps to solve the 
problem with the speed curve. Now it works fine :-) It is a clue for 
fixing this bug.

> I was trying to write a tutorial on speed changes in cinelerra ... but 
> I am encountering many errors with the speed line. Another problem is 
> the one that occurs if you paste or insert a clip in a track with the 
> modified speed, the result is what one expects. For example, in the 
> video clip a clip that lasts an exact minute on a track where the 
> speed is at x2 and this should cause the clip to last only 30 seconds, 
> but no, it lasts 1 minute, but with the last frame frozen . And with 
> the copy and paste of a fragment the same thing happens, the clip 
> lengthens, which makes the use of the speed change line very puzzling.
> https://streamable.com/ehnhj9
> It should be something simple to modify the speed, but in cinelerra it 
> is not. The only way I don't get errors in its result is by varying 
> the speed once the clip is inserted. It is very difficult to do a 
> composition job in this way, for the only thing that I see very 
> optimal its use is once the assembly is done, changing the speed.
It would certainly not be wrong to have a time plugin (for audio and 
video) that can be used as an alternative to the speed curve. I am a fan 
of the speed curve, but sometimes such a time plugin would not be wrong 
in certain situations.

I will attach this post to the ticket.

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