Made my first attempt at speedrunning the other day. I got an HDMI to USB adapter to stream to my laptop, then used AMCap to dump the raw output to an AVI file.

VLC complained about a non-existing index, but still played back the video fine. However, when I tried to upload the video to Youtube, the sound lagged seconds behind.

I've tried exporting this AVI file to something else using VLC, but everything I've tried re-introduces the lag. Is there something that I can do with this file that will make Youtube happy with it?

Going forward, I will move to Bandicam, which seems to do a much, much better job with my captures.

If you're going to try other recording programs, I'd instead try OBS Studio, which is superior to Bandicam and is completely free.

Thanks for the suggestion. Tried that, but seems to be too much for my old laptop to handle. Perhaps I'll be able to upgrade that around Christmas time.

Did you try an application called virtual dub? Whenever I record my games sometimes the sound is out of sync from the video best way I know of to fix this is to go to an option called audio interleave and add a delay of 1000 ms. You would have to fool around with it though to get the best results but that option has always fixed audio desyncs for me. I have no clue about OBS though because I've never tried it. I've always used the emulators internal recording feature when capturing and I use a software application called fraps to record my pc games it's always worked for me.. I know that fraps is kind of outdated and screen recorders such as OBS are superior from what I've read and seen on youtube. Hope this helps you.

I should add that OBS has settings you can tweak, so if you turn down resolution/framerate/bitrate/etc., you may have better performance on your computer.