What settings do I need to set to the saved video in Sony Vegas Pro 10.0 so that the sound does not lag behind during playback?

Question

Video

In Sony Vegas Pro10.0, I glued 4 videos into 1. When rendering, I used the "Sony AVC / AAC" output format. Preset "Internet 1920/1080-30p". Bit rate 20,000,000. I chose these settings because I read on the Internet that they are suitable for uploading to YouTube.
The video was saved for about an hour. After reproduced in Windows Media Player. From 8 minutes the sound began to lag behind the video. I assume that you need to change the audio settings when rendering. If so, which ones? Thank you.

Answer 1

Audio may lag only if VFR (Variable Frame Rate) is enabled. This usually happens with videos that were made by screen recording programs and the like, while cameras shoot at a constant frame rate.
That is, when outputting, you need to set some specific frame rate, for example 25.
I didn’t quite understand about the bit rate of 20 million, it is usually calculated in megabytes per second (or in thousands of kilobytes per second). Put 16 megabytes, CFR (permanent).

Answer 2

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