OpenShot Video Editor

Audio/video clip and sync problems when previewing.

Asked by Kam3bombh9k-dan-wph05ilav2k

I've imported some clips, cut them up a bit and overlayed some pictures and transition.. When I play the video from the beginning it run perfectly. If I put the play head anywhere but the beginning everything gets way out of sync...

The video will start at a later point then it should have and plays past the clip point for about a second.. I can't quite figure out what the audio is doing but it always begins with a 1/2 second buffer stutter.

I have an Nvidia video card, SLI with an ASUS motherboard w/ 4 AMD 64 CPUs. I just upgraded to the latest version of Kubuntu.

Thanks.

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Kam3bombh9k-dan-wph05ilav2k (kam3bombh9k-dan-wph05ilav2k) said : 		#1

I should add that I seem to have to make the window very small for the program to even work at a decent speed. If I run it full screen the actual GUI runs unbearable slow. I switched to sdl_preview to a slight but not significant enough advantage.

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Kam3bombh9k-dan-wph05ilav2k (kam3bombh9k-dan-wph05ilav2k) said : 		#2

Okay.. so it's very odd. The overlayed images sync to the audio perfectly. The video clip itself is always shifted when I start from anywhere but the begging.

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Kam3bombh9k-dan-wph05ilav2k (kam3bombh9k-dan-wph05ilav2k) said : 		#3

When I stop the video the play-head now jumps back almost an entire second with a smooth animation. I can't seem to tell where to make my cuts based on the audio because I don't know where the actual play head is.

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Kam3bombh9k-dan-wph05ilav2k (kam3bombh9k-dan-wph05ilav2k) said : 		#4

Okay, everything gets really messed up with the new cut. The audio is definitely now out of sync, even in the final exported rendering.

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Andy Finch (fincha) said : 		#5

If you're using AVCHD files then seek/performance problems are not unusual.

https://answers.launchpad.net/openshot/+faq/983

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