There's no audio/video out of sync probs with Video Factory: click here
Also, when using a utility like TMpegEnc it's best to separate the audio/video file/s and then copy from different locations to prevent out of sync.
Samsung Galaxy S8 review
1995-2015: How technology has changed the world in 20 years
This 2D animation about monsters is illustrated in a Van Gogh painterly style
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Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.