Why is the audio out of sync with the video after using the trimmer or converter in RealTimes or RealPlayer? Why can't I play the full video after using RealTimes Converter?
The most common cause of "Lip-Sync" issues (audio/video being out of sync) or incomplete videos after conversion, is your computer's CPU/RAM and how much it is tasked during the conversion. If other programs are running, especially internet browsers or anything that uses your system resources including RAM and CPU, frames can be dropped in the video and the synchronization issue can be significant.
Always convert files with no other programs running and a clean system.
If you still experience audio sync problems even under those circumstances, there are many third-party programs that address this common issue on the internet.