It has happened to me in the past. I found that restarting a new project and trimming that video alone a second time usually did the trick. You can then render (produce a file) that video alone and insert it in you old project if you had any other videos on there already.

I don't have any idea why this happens however.

Hope this helps.
Regards
Stephanie

Thank you Stephanie once again for your reply.

Split the audio track from the video track. Then start trimming. The audio will remain intact. However the length of audio track will be more than the trimmed video track which you need to adjust. PC specs :
OS Windows 10.0 Pro
MB - AS rock Z77 extreme 11
Intel 3770K @ 4.0 Ghz OC
Gskill 32 GB RAM 1800 Mhz
6 TB HDD, SSD bootable
nVidia ASUS GTX 660 Ti
BenQ 22" LCD monitor 1920x1080

Thank you Babdi for your reply.I'm not sure what you mean.I am trying to trim video clips and leave the audio track alone. When I trim the video I find the audio track is trimmed from it's end -not even in the same place. I think I'm a little confused by your first sentence;"split the audio track from the video track". If you could explain a little more I'd very much appreciayte it. Thank you once again.

When you insert the video clip you will notice the audio track underneath it.
Right click the clip and select "Split audio". The audio will split and go to music track. PC specs :
OS Windows 10.0 Pro
MB - AS rock Z77 extreme 11
Intel 3770K @ 4.0 Ghz OC
Gskill 32 GB RAM 1800 Mhz
6 TB HDD, SSD bootable
nVidia ASUS GTX 660 Ti
BenQ 22" LCD monitor 1920x1080

Babdi Once again thanks for this. However I think I've been inaccurate with my description of the problem:when I said audio I meant music track. I inserted music into the the music track and it was this that trimmed from the end when I split and deleted video clips.There is no logical reason why the programme should do this as it serves no function so I wonder whether this is an issue with PD7? Thanks again.

This happens to me too and I am using PD6 so not just an issue with PD7. What I do is just slide the music track to the side out of the way, trim the video, then just slide the music track back in place. I now get into the habit of adding my music clips last (after all the video trimming) so there is less hassle. Not sure if there is an easier way but this works for me.
Bob

Hi everyone.

Perhaps I'm misunderstanding too, as there are a lot of different terms and interpretations going on here.

But the first thing I always do after I've put something in either the Voice or Music track, is to lock that track by clicking on the little padlock icon. That way, no matter what trimming functions I do to the Master track, the Music track is locked in position and can not be edited or changed without unlocking it again.
If you do not lock the Music/Voice track, then it will change and automatically get trimmed to the duration of any edits you make on the Master track. Click here PDtoots for a collection of PowerDirector Tutorials and Tips

Okay the problem is video track & audio track need to de linked or de-grouped so that even if you trim the video the audio stays intact.

You will notice a small padlock icon on the left the audio track. Lock it by clicking it. PC specs :
OS Windows 10.0 Pro
MB - AS rock Z77 extreme 11
Intel 3770K @ 4.0 Ghz OC
Gskill 32 GB RAM 1800 Mhz
6 TB HDD, SSD bootable
nVidia ASUS GTX 660 Ti
BenQ 22" LCD monitor 1920x1080

Thank you everybody for replying to my problem. I'm going to try the suggestions and report back. Thanks again.

Cranston, you are a genius once again. That sounds like a much easier way of doing it than I was, I didn't know that and I will lock the music track in future....phew! much easier!

Yes it worked. Locking the Music track is the answer. Thanks for all the help from everybody.