Why will audio and video not sync in rendered video file? When I import a movie clip into Blender's VSE, I match the resolution and framerate (1288 x 1032 at 25fps in this instance) and the audio and video strips appear to match up in the display. With AV-sync, the audio and video appear to playback in VSE in sync.

Unfortunately the rendered video file seems to be playing video at twice the speed of the audio (while at the same framerate, 25fps).

Why is Blender outputting a file with a video track playing at twice the speed that it was imported? I am trying to reduce the size of the video's resolution - could this have an effect on it?

OS:  Microsoft Windows XP Pro (5.1)
MOTHERBOARD:  Gigabyte P35-DQ6
CPU:  Intel Core2 Quad CPU
MEMORY:  2046MB RAM
DIRECTX:  Direct x 9.0c
GPU:  NVIDIA GeForce GTX 560 Ti

An image of my Blender import/output settings with the VSE can be found at the following link, along with sync test .avi I'm using to test this problem and a rendered example of the test, showing the problems I'm having - https://www.dropbox.com/sh/1pgn7l1sz7l8uz1/C6UHBBTdO0

Currently enjoying Sebastien Konig's Match Track Blend DVD and this little problem is an annoying distraction. I look forward to getting back on track. =)

Thanks in advance,

--Rev
I loaded up your syncTest01002Rev.avi file and playback wasn't in sync. Inspecting the file with ffmpeg gets the following message: "[mpeg4 @ 0x19ecc00] Invalid and inefficient vfw-avi packed B frames detected". Re-encoded to fix the error, when loading into blender, it had an extra frame (680) and worked without issue.