Hi,

I agree with Jeff.  His explanation of how that happens is right on the money.  If by "flicker" you mean that the video appears to jump or you get a black or white frame, you need to find it and remove it. You need to be careful how you do this because you could put your audio out of sync by a frame or two.  What type of transition are you using?   It could also be a simple matter of not having preview rendered the clips on your time line.  There are many reasons for what you describe.  The best thing to do would be to upload a video to youtube with a short segment of the "glitch" that you describe and let us have a look at it.  The reason I suggest youtube is because we can then download the youtube video, and look at it frame by frame to try to see what is happening.

Hi.

Thanks for the extra info.  Yes it does make it clearer and confirms what I thought you were asking!

There are two ways to remove the "glitch" at the file joins:
1.  It is possible your camera came supplied with software that will allow you to join the files so that they become one continuous file. i.e if you have three (or more) files the software will join them and make one contiguous file.
2.  If your camera, like mine does not have suitable software supplied with it you will need to find and download the free utility called "tsMuxer". You do not need to install anything just run it on your computer and it will do an excellent job of joining the files into one, just as if you were using the camera's own software.  It's a little bit "fiddly" to use: you have to select your first file and then click on "Join" to add each subsequent file in order, adn I have found it is best to choose "M2TS Muxing" as the output format because it works best with VPX and hence, presumably MEP.

I have used tsMuxer to successfully join several files (e.g. a wedding video where the main ceremony lasted about an hour and fifteen minutes, hence 5 contiguous files.)

Jeff

BTW, the other info requested in that post I linked to before, which includes more details of your computer spec etc. can also help we fellow-users in attempting to diagnose solutions.

Hi,

Here is another answer that I came across today by chance. In Program Settings, Video/Audio, the last item under Import is Crop videos. The help text calls it Trim videos instead of Crop videos and states:

"Trim videos: Sometimes video clips have damaged frames at the beginning or end. Most often these are green, black or incomplete. Here you have the option of automatically trimming your videos during import if your footage constantly has damaged frames. Specify how many images (frames) should be trimmed at the beginning and the end of the video."

I haven't tried it yet, but I had the same problem and just trimmed one or two images at the end of each contiguous mts clip.

Hi

What make / model camera are you using?

This sounds like the camera is occasionally recording with partial frames being saved.

Tthe only time this may occur is at the boundary of the individual file size limit of 2GB. There is a small pause in recording as the current file is closed and the next file opened - this should never happen because the camera should buffer complete frames while the changeover occurs. 

When it does the browj2's option is the way to go - note this will only remove incomplete frames so will only work on those clips which have the problem.

If you are using memory cards the pause may be caused by the wrong type of card is being used.  For most cameras you should be using Class 4 or higher cards - see this article (approx 1/2 way down page).

HTH

John

Hi,

It could be the issue I sometimes get with the MOV video clips from my Canon Ixus 220 HS (and the AVI from my previous camera.) Try zooming in fully to the transition point (use Ctrl+1) and see if there is a gap of less than a frame. If so, delete it by deleting the frame to its left and see if that gets rid of the glitch.

Terry, East Grinstead, UK 

Hi whitmers

When you say "transitions" do you mean you have overlapped the clips and created a "crossfade" (or some other fade effect) or are we talking about a "hard cut" from one clip to the next?

It may be worthwhile to test export the problem section and see if you see the same problem. In my experience I sometimes trim a disturbance from the end of a clip boundary, with a hard cut to the next clip, but still see a flicker or some remnant of the disturbed cut frames during subsequent preview. This can come and go during realtime preview but not be visible at slow or frame by frame review, nor on export. This may possibly be due to the fact that the MPEG GOP has been cut or is incomplete and displays incorrectly?

The incomplete GOP problem can sometimes be remedied right clicking the clips and selecting "Create New Frame Table" right after importing the clips (but not if you have done any editing!).

When it does the browj2's option is the way to go - note this will only remove incomplete frames so will only work on those clips which have the problem.

JohnB

This is not correct. This option will cut any frame quantity that you specify on any clip that you subsequently import after setting this in "Program settings". This is a very useful feature to top and tail clips automatically to get rid of jiggles and blurs that ofter occur when pushing the stop button on the camera.

Peter