It seems to have affected only two videos so far. Since then it has worked fine, no idea what could have caused it.

Same problem here. I just found that there's big gaps in my recent GuildWars2 footage. The sound in those videos seems to continue all the way through but there's parts of the video missing. It was a bit confusing at first but then I noticed that what I was hearing should have happened way before wh...

Quick update:
Everything works fine since I installed the latest driver for my graphic card (Nvidia GTX 660M). The game runs much smoother, even with shaders, and the recording seems much smoother as well. So apparently it wasn't an Optifine problem.

Okay, thanks.

Thanks, but I have no problems at the moment, I just wanted to help the thread starter find the problem. I don't really need Optifine, so it's okay for me (the videos are just for private purposes).

I'm not sure but I think you can only record from the DOSbox in window mode, can't you? The game I tried to record went to full screen when it started, but the actual DOS box was just a small window on my desktop, so I had to try and capture that area using the window mode (which was difficult becau...

Thanks guys: I just managed to cut a video that crashed every time I fast-forwarded it in Avidemux. I thought I was beginning to lose my mind ...

Just a question: Can I also cut movies that I recorded from tv (.ts files)? Or will this be supported in the future?

I had a strange problem when it comes to Minecraft. I used to record my gameplay with an 128 resource pack and experienced no lags at all. Then I didn't play for some time, and when I tried to record another gameplay video (this time with a 64x64 pack) it felt like walking through jelly. I tried all...