I have been trying to record my screen for some YouTube videos I make but on Ubuntu whenever I run the command avconv -s 1600x900 -f x11grab -i :0.0 -c:v libx264 -f pulse -i default -c:a aac sample.mp4 the audio falls out of sync. I have figured out that the video is what advances and delays. What can I do to make sure that the audio and video stay in sync when I record?

1 Answer

I've come across this problem once. I've solved the problem by using:

ffmpeg -f alsa -ac 2 -i pulse -acodec alac -ab 128k -f x11grab -s `xdpyinfo | grep dimensions:'|awk '{print $2}'` -r 25 -i :0.0 -sameq final.mkv

I've explained the details of this command in a blog post here.

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