[FFmpeg-user] Audio is out of sync

[chappy]

I use the following command to capture a 20 seconds video
ffmpeg -f alsa -i hw:1,0 -vol 2048 -f video4linux2 -i /dev/video0 -vcodec
libx264 -preset superfast output.mov
The video quality is great, but audio is out of sync (issue 1)

Also I imported this video in Final Cut Pro 7, made 1 minor edit and export
it.  It took nearly 30 minutes to export this 20 seconds video (issue 2). 
Why/how did it take so long?  Anyone know the reasons for those 2 issues?
thx in advance



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