[Cin] Playback Slows Down Immensly Durring Transitions

Benrob0329 ben at innovationplex.com
Fri Mar 8 07:14:28 CET 2019

 From a few quick tests on my laptop, there were a few things I noticed:

1. Cinelerra-GG handles supprisingly well on moderate hardware
2. Cin transitions between different files with ease, but has more 
trouble transitioning between two edits from the same file (not just 
with my heavy recordings either, even a small YouTube video seems to 
have this issue).
3.The Arch package needs to be rebuilt, I just updated my laptop and 
libvpx is now at version 6, while Cin-GG is looking for version 5 (had 
to symlink to get it to launch, seems to work fine)

So while Cin plays the files with relative ease, and can even playback 
at double-speed or backwards without much issue, actually cutting to a 
different part of the video seems to slow it down. Perhaps it has 
trouble seeking within the same file for two different positions at 

On Fri, Mar 8, 2019 at 12:08 AM, ben at innovationplex.com wrote:
> Sorry for my late reply to this thread, been busy this week.
> My tests show that with the screen captures recorded with OBS (most 
> recent one is 20mb/s at 1080p60, h.264 in a FLV container) have 
> trouble transitioning. Hard cuts fair slightly better, but still 
> present some slowness. I'll conduct more tests with different files, 
> as well as on my laptop (which is running a straight SSD, unlike my 
> desktop which runs the SSD as a cache device for a hard drive using 
> bcache).
> Compiling latest git did not show any improvement (even with -O2), 
> and I use the official cin-gg package for Arch Linux normally.
> On Sun, Mar 3, 2019 at 8:17 PM, Phyllis Smith 
> <phylsmith2017 at gmail.com> wrote:
>> Andrea, I think I might have confused the problem when your computer 
>> was acting strangely or when you reported the mkv slowness.  Anyway, 
>> from the information you provided and the dropbox transition.mp4, it 
>> looks like transitions are working as expected with your normal 
>> installation.  Thanks for checking, gg/pys
>>> With my normal installation I have the following results:
>>> <https://www.dropbox.com/s/h8p4tyvx2snwiyi/transition.mp4?dl=0>
>>>  I summarize the results:
>>>  mp4 --> wipe --> png --> dissolve --> 3gp/cut/3gp --> slide --> mp4
>>>   30      29       29      21 (png?)    30  28  30       29       
>>> 30 Fps
>>>  I can tell I don't have any particular problems.

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