AVCHD transition blips in VS Pro X7

[markguitre]

This was a topic that was active (then locked) about 4 years ago, so I thought users, if not Corel itself, had solved it.
But here in mid-2015, using VS Pro X7, I still find I am periodically getting that 'blip' or 'jerk' effect after a
transition while rendering an AVCHD project. The clips are from a Panasonic HC-V720 camcorder. I always render
"same as the first video clip." Those clips are MPEG transport stream files, 24 bits, 1920 x1080, 29.97fps, upper field first,
16.9, H.264 video, variable data rate, 16800kbps, audio date rate 384kbps. Please advise!

[lata]

Hi Mark Lis

Unfortunately the blip immediately after transitions does seem to appear now and then reported by some users.
I use a Pana 900 series, although Pal version, having similar properties to the ones you show, but not had a problem with those blips…………

Do you match your project properties to video files properties?
Using Preferences --- Show Messages should do this for you when inserting the first clip to a new project.
For existing projects manually set the project properties.

When you render have you tried deselecting Smart Render, although rendering will be longer it may smooth out those blips.

Not all transitions seem to affect this, can you say which ones you are using, I know it can difficult to id those transitions within the project.

[markguitre]

The transition I use most often is "crossfade.'" I am afraid I have not paid much attention to "project properties," only making sure I render
to the same properties as the first clip (by selecting that option). Could that make a
difference? I always have smart render checked, but will give it a try without. Thanks.

[lata]

Hi

Unfortunately we don’t know why this should happen, only to a few users.

Setting Project Properties to match the video files properties (where possible) is advised, it not only sets the frame size correctly also sets the timeline frame rate.
Smart Render works more efficiently when the properties match. Whether that is the cause is not certain.

Set Show Messages --- try a new project adding a couple of video files add crossfade and render?
I don’t know if our suggestions will improve things as we don’t know why its happening.
Certainly Smart Render can cause some issues, audio out of sync has been corrected deselecting Smart Render, worth trying for those blips…
For most video Smart Render works well

[markguitre]

I have tried de-selecting smart render then rendering a few blippy clips.
Result: The blips are still there, though smoothed out slightly; but, is it
just that I want to notice some difference, or there really is no difference? Not sure.
Anyway, in my case, this doesn't fix the problem.
Then, I rendered the same clips de-selecting smart render, but also matching the
project properties to the clip properties. The result is the same: might be a slight
improvement, or I'm just imagining things.
It's a shame that after at least five years, Corel still has this kind of bug present in their product.

[lata]

Hi

Can you provide samples of your video file, maybe upload to Microsoft One Drive, DropBox or Google drive.
Provide a sharing link so we can download.

Better still would be to create a Smart Package, zip that and upload.

[Ken Berry]

I have tried de-selecting smart render then rendering a few blippy clips.

Can you clarify what you mean by "blippy clips". Are they the original clips which produced blips after rendering; or have you inserted clips you produced with the blip, and the blips are now smoother?

Then, I rendered the same clips de-selecting smart render, but also matching the project properties to the clip properties.

Can you please confirm that when you did this you first ticked that Show Message box; then created a new Project then inserted the first clip and got the message. Or did you manually set the Project Properties to match those of the clip?

[markguitre]

To test if de-selecting smart render and matching file/project properties would eliminate the blips,
I went back to the saved project and re-rendered just a segment of it where the blips occurred.
So, yes, I used the original clips.
As I said, I am not sure the smart render uncheck or file/properties match did anything.
In my test, I manually set the project properties to match those of the clips. Does that make a difference?
I have some reservations about uploading, so I doubt I will do that. Besides, it is well documented within this forum that the blip
or stutter artifact stems from a clip's last frame or two being repeated (especially when a transition follows).
It is surprising to me that Corel has had at least five years to work on this problem and has failed to fix it.

[lata]

Hi Mark Lis

Unfortunately Corel do not visit this forum and unless someone has approached Corel Support they are probably not fully aware of the problem.

Have you in the past reported this to Corel?
If yes then they would have requested samples of your video to try to replicate the issue, and that is all I am asking for.

You have a Windows operating system installed, probably including Microsoft Live, which has the Microsoft One Drive option allowing you to share your files.

Ken

The forum is slow again, took ages to post this reply?

[markguitre]

Yes, I recall reporting this to Corel back in 2010 or so; but nothing ever came of it.
So I think it's now time for a friendly reminder.
Here is the link to two blip-laden video examples:
https://onedrive.live.com/redir?resid=A ... EwNPWbKBbV

[lata]

Hi

That link does not seem to work for me, says the files are no longer available?

Can you also provide two original files without the blip, then we can try to replicate the problem.

[markguitre]

I try to upload here, but nothing gets attached: Upload attachment/Add the file.
Then ten minutes later I am informed the attachment is too large, though it's only a few seconds (of mt2s).
I'm not sure what is wrong with MS One Drive, because I created an account, uploaded only 2 files,
marked them to share, and that generated the URL.
Try again with the shortened version of the link:

http://1drv.ms/1I9mjGl

If that doesn't work I am out of ideas.

[Ken Berry]

Those two downloaded OK and show the blip. But we already knew you had the blip. It would be more useful if we had bits of the *original* clips which we could then test to see if we could also get the blips on our own setups...

One thing I found interesting was that in the second clip there was a blip both before and after the transition, whereas in the first one the blip was only after the transition.

When I put both of your clips in the X8 timeline, a crossfade was automatically inserted between them (as I have that selected as my default transition). I rendered the new video using Same As Project Settings (as I had that box ticked). There was no blip after that crossfade -- though I have to say that was difficult to tell as the blip preceding the transition in clip 2 came so soon after my own crossfade... But after replaying the new clip several times I still could not detect a new blip.

[markguitre]

Setting the project settings to match the video clips automatically, by checking that box,
seems to have solved the blip problem for me. Previously, I had not paid attention to project settings at all, only
making sure I rendered "same as the first clip." Then, upon the advice given here that project settings might make a difference,
I went and set them, but I did that manually, which didn't help. The trick is to let VS set the project properties to match as soon as the first clips goes into the timeline.
My thanks to Ken Berry and lata.

[Ken Berry]

Glad it worked, and I hope it continues to do so!