Editing problems

golden · Post by **golden** » Mon Nov 17, 2008 9:54 pm

Hello, hopefully someone can help me. I am very new at using this type of software and I have a problem that I believe is quite simple to solve but is something I am doing wrong.
I have a head cam fitted to my motorbike helmet; it records film and stores it on an SD card. When full (2GB) I down load the files and store them on my laptop. The files are AVI.
My aim is to edit these films and transfer them to DVD's for people to watch. Nothing too complicated but just remove the starts and edit out some boring bits, add some transitions and add a music track.
The version I am using is 11 plus and I have downloaded any patch etc I can find off the main site.
The problem I am suffering from is with the audio when I have trimmed the clip. I open the original file as a clip; I have then used different methods, according to the manual to remove some of the start of the clip. This works fine and plays fine as a clip. If I then put this clip on the timeline and select project the picture remains as clipped but the audio comes back as the original i.e unclipped therefore totally out of sink. This happens whichever way I try and cut the clip.
Sorry this is a bit longwinded but I am getting rather frustrated now. I have tried to make it sound as obvious as I can.
Looking forward to an easy answer.
Many thanks

Clevo · Post by **Clevo** » Mon Nov 17, 2008 10:19 pm

Some further information is required:

With the video in your timeline right click it and copy down the properties as it is shown to you.

The syncronisation of sound and video is easy to mess up especially when working with compressed video and sound files.

although you mention a fair bit it's still hard to work out how you are working (work Flow)

Do you for example "split Audio" from the video?. Depending on your work flow this could caus sync problems when you edit the video on the time line (project) rather than the clip.

So...we need more information on how you are working and more in fo with what you are working with.

golden · Post by **golden** » Mon Nov 17, 2008 10:57 pm

Hi and thank you for a quick reply. I have tried to cut the or trim the file, also split the audio and then trim, as you say this was in fact worse.

Clevo · Post by **Clevo** » Tue Nov 18, 2008 10:04 am

It's a very unusual video specs for editing and you will be hard pressed to convert that to DVD quiality without losing quality.

To give an example DVD video is sampled at a data rate of 8000kbps and you are using video with a data rate of 563.73 kbps

Your frame size is also smaller than the usual DVD format.

Do a search on this forum for Mjepg (motion Jpeg) as I recall reading users of this format having problems and there may be some clues.

When editing with this format, don's split the audio from the video. But I don;t think you will be happy with the results in converting it to DVD mpeg.

The format you are working with is more suited to distributing over the web

golden · Post by **golden** » Tue Nov 18, 2008 10:41 am

Hi

I originally used a trial version and managed to produce an hour long DVD from four different clips. The quality of the DVD was actually better than playing the headcam directly on my TV. This is why I went ahead and bought the software.
What I didn't realise is that the sound track I added drowned out the fact that the video sound was out of sink.

I will have a search for what you suggest and see if it throughs up some ideas.

Many thanks

skier-hughes · Post by **skier-hughes** » Tue Nov 18, 2008 10:47 am

As Clevo says this is a highly compressed file and I'm surprised you achieved better results than the original, but hey, it's great.

As it's a file that VS doesn't work well with, why not try putting it all on the timeline and then save the movie file as a dv.avi file.
Check audio sync, then use this to edit.

golden · Post by **golden** » Tue Nov 18, 2008 12:27 pm

skier-hughes wrote:As Clevo says this is a highly compressed file and I'm surprised you achieved better results than the original, but hey, it's great.

As it's a file that VS doesn't work well with, why not try putting it all on the timeline and then save the movie file as a dv.avi file.
Check audio sync, then use this to edit.

Sorry can you tell me where the audio sync is?

Clevo · Post by **Clevo** » Tue Nov 18, 2008 1:29 pm

golden wrote:
skier-hughes wrote:As Clevo says this is a highly compressed file and I'm surprised you achieved better results than the original, but hey, it's great.

As it's a file that VS doesn't work well with, why not try putting it all on the timeline and then save the movie file as a dv.avi file.
Check audio sync, then use this to edit.

Sorry can you tell me where the audio sync is?

He means to play the video file after editing and see/hear is the sync issue is still there....

skier-hughes · Post by **skier-hughes** » Tue Nov 18, 2008 1:34 pm

I do indeed, sorry if I wasn't clear.

Clevo · Post by **Clevo** » Tue Nov 18, 2008 1:40 pm

It was clear

golden · Post by **golden** » Tue Nov 18, 2008 2:22 pm

Clevo wrote:It was clear

Clear to somone who knows what there are doing, in the uk "check" can mean click the box.

Anyway I have put the file in the time line and went into share, selected "create video file" and then chose DV Pal 4:3. This as predicted created a 3GB file but the sound was still out of sync.

I have also attempted to create a wave file of the audio but that won't sync either.

Do I give up or persist?

Black Lab · Post by **Black Lab** » Tue Nov 18, 2008 5:22 pm

When you trim a clip it is only a "virtual" edit. The original clip is untouched. And not knowing your precise workflow, maybe the problem lies there in some way.

Try this. After you have trimmed your clip go to (at the top of the screen) Clip>Save Trimmed Clip. This will save your trimmed clip as a brand new video file (no longer just a virtual clip). Now insert the new clip in the timeline and check (

) the sync.

Clevo · Post by **Clevo** » Tue Nov 18, 2008 10:23 pm

Is the sound in Sync when you are in project mode? (before rendering to a video file).

golden · Post by **golden** » Wed Nov 19, 2008 9:14 am

Black Lab wrote:When you trim a clip it is only a "virtual" edit. The original clip is untouched. And not knowing your precise workflow, maybe the problem lies there in some way.

Try this. After you have trimmed your clip go to (at the top of the screen) Clip>Save Trimmed Clip. This will save your trimmed clip as a brand new video file (no longer just a virtual clip). Now insert the new clip in the timeline and check ( ) the sync.

Thank you for the suggestion but this is how I found the problem in the first case.

golden · Post by **golden** » Wed Nov 19, 2008 9:20 am

Clevo wrote:Is the sound in Sync when you are in project mode? (before rendering to a video file).

I have used multi trim to select a small part of the video, saved the trimmed clip. I then insert the trimmed clip into the timeline and then add another trimmed section. As a clip they play fine. I have then tried to save as a project. As a clip they play in sync, as soon as I try and play a project the sound is out again.