[FFmpeg-user] Video/Audio out of sync when converting from FLV to MP4

Rob Desilets rd at icalc.com
Tue Apr 30 16:31:14 CEST 2013


I am saving a live stream using the Flash Media Live Encoder 3.2.

Format: H.264
Frame Rate 30
Profile: Baseline 3.0
Keyframe Frequency: 5 seconds
File Type: FLV

When I convert it to MP4 using these flags:

-c:v libx264 -crf 22 -preset slow -profile:v baseline -level 30 -c:a 
libfaac -q:a 100 -r 30 -async 1

The audio and video get out of sync.

I was wondering if anyone had any ideas what might cause this?

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