troubles with editing on beat

[Jan E]

Dear All
I work as follows when I edit on the of beat of music.
place a music-track on A2 . Listen to the music and I do place markers by clicking the 'v'' on te beat of the music.
When the markers are set, I place the video tracks on V1, by using the markers as in and out-point of the scenes.
When I start at the beginning of the track, everything goes well.. however.. when I start the timeline after a few minutes, the sound track is not on the same beat as the earlier placed markers.
When I start at he beginning the sound and marker on the beat are correct again.
Does some one had the same issue I have now? Looking forward to see your help
warm regards Jan

[GrassValley_SL]

This can happen if your audio is mp3.If this is the case it is best to covert it to a wav.

[BernH]

Originally Posted by Jan E

Dear All
I work as follows when I edit on the of beat of music.
place a music-track on A2 . Listen to the music and I do place markers by clicking the 'v'' on te beat of the music.
When the markers are set, I place the video tracks on V1, by using the markers as in and out-point of the scenes.
When I start at the beginning of the track, everything goes well.. however.. when I start the timeline after a few minutes, the sound track is not on the same beat as the earlier placed markers.
When I start at he beginning the sound and marker on the beat are correct again.
Does some one had the same issue I have now? Looking forward to see your help
warm regards Jan

Without a little more information it is difficult to pinpoint, so lets start with the basic questions.

What are the properties of your audio file and the file type?
What are the properties and type of your video file?
What are your project settings?

For audio to stay "locked" with video it should be uncompressed wav files with a 48kHz sample rate. If you are using MP3's or your sample rate is not 48kHz you will have audio drift and sync issues.

If your project and audio is right and you are still having problems, perhaps your CPU or drives are not fast enough to handle the video and audio at the same time. What are your basic system specs and what kind of drive are you editing from?