Timeline performance issues


#1

I have been trying to use shotcut for a short amount of time so far and notice when I drop the video into the timeline, that is only when I get really bad performance/lag as it plays the video back to me… When I remove it from the timeline and just have it play, it is fine. I don’t know what the issue is here.


#2

We need to know what your system is(cpu memory storage ram and os), version of shotcut, and project information(resolution and format) in order to even take a guess.


#3

CPU: AMD FX 8350 eight core
8GB RAM
Newest version of Shotcut
1440p 60fps on the footage.


#4

What format is the footage and what shot it 1440p60 isn’t standard? And that’s above 1080 with a slow cpu, you might get better performance taking the time to convert it to a editor friendly format such as HuffYUV your issue is most likely the cpu not being fast enough.


#5

IT is an MP4

And do forgive me, I am not the most computer savvy person


#6

It depends upon what track you put it into, what type of track blending you use, what filters are added, and so on; but basically that is normal and expected.


#7

Video track, not edited yet


#8

MP4 files are usually fine unless they’re VFR, what was it recorded it? what does your cpu usage(open task manager) look like when you’re trying to preview the clip?


#9

Also, be aware that as soon as you add to Timeline, it starts to generate audio waveform and incrementally update it in the Timeline in the background. This will have a noticeable impact until that process completes, and it can take a long time if your video is long.


#10

^ well then that might be most of my issue because it only happens when it is in timeline. Next time I will be sure to let it set for a while


#11

Hey on that note are there any audio formats that are easier for it to handle than others? When converting the video to a better format it wouldn’t be a huge deal to convert the audio as well(or does having the audio as a separate track help? I could always split them)


#12

There is very little that helps except SSD because I am sure much of it this is storage I/O bound as the audio decoding is very light. With that said, uncompressed 48000 Hz will be lightest to process because there will be no decoding or resampling.


#13

Maybe its helps if you launch the program, then start taskmgr.exe and set the priority of the process called shotcut.exe a bit higher… this helped me a little, but did not lead to perfect results.


Intermediate Files for Editing