Distortion- Black pixelated line appears on some frames at the top and immediately dissipates

joeysun

@borateBecause I have legacy DSL (just faster than dial up), it takes several hours to send the files. To be sure, do I <menu><file><Save Portable Project As...> or do I <Back Up Project Files to Folder>?

@[deleted] v10.36 has a bug which when you <next frame (right)> or <previous frame (left)>, it jumps you to the <previous or next clip edge> or even to the beginning or end of your timeline. However, I do all my editing on 10.52 and even though there are distortions in the Preview, Exporting on 10.36 avoids having the distortions in the final product (the whole goal).

borate

If this is a simple ZOOM-output to an mp4 file, you don't need to submit a project - just the file. No need to use the 'back up project to folder' routine.

Just upload to a free server, get a link and post it here.

joeysun

That is going to be an issue. Zoom will output 3 mp4's (Gallery view, Speaker view, and ScreenShare view). I use Videopad to add these three mp4's to 3 video tracks, dropping the Speaker into a Picture in a Picture and moving the speaker to a spot where their shared screen presentation is not blocked by the picture. That is when the distortion shows up, always as a black bar on top which goes away shortly afterwards.

I then parsed the video to give a desired 6 minute section which has even more frequent distortions.

That is the whole purpose of Videopad, to make the presentation more viewable than the raw files. I will have to send the project folder like your 2nd post instructions to Steve1124 in this thread.

borate

Good enough. Don't send the exported file, and be sure if using Google to make it "anyone can view."

Steve1124

I am working with the earlier version, the distortions are much reduced but still show up at times.

Not sure what the problem is now.

Steve

borate

Export ONLY, or artifacts on the timeline as well?

joeysun

@[deleted] here are the files https://drive.google.com/drive/folders/10Llr2ZglVhUQqAs6sfHV8kSmjMcmkP_D?usp=sharing .I hope this helps

@[deleted] When I use v10.36, I also saw one instance with the distortion on the timeline. However, it did not show up on Export. Almost all my distortion shows up in Picture in Picture Scale function when there are two video tracks.

borate

Thanks for sharing. Both timeline and export, at default quality and resolution settings, were clean in 10.52 here but for a few black holes, which were intentional.

Test version 8.45.

joeysun

borate wrote:

Test version 8.45.

Just to confirm, you are using Videopad v8.45 rather than the latest v10,52. Is there a reason for testing and exporting with that version? Even @[deleted] was using v10.39 when he opened this topic.

borate

No, using 10.52 for those tests. Suggest that you try 8.45 and report whether it performs differently.

It isn't quite clear that what you are seeing is the same as what Steve1124 sees - black squares occasionally at the top of the image.

joeysun

borate wrote:

No, using 10.52 for those tests. Suggest that you try 8.45 and report whether it performs differently.

It isn't quite clear that what you are seeing is the same as what Steve1124 sees - black squares occasionally at the top of the image.

Spot any glitches in the text export?

I saw no glitches on your v10.52 export. I cannot find a way to attach a picture to this Forum, so here is a link to a screen shot of what my problem looks like in v10.52: https://drive.google.com/file/d/1KZdT1RBOPNhAFHkHAGUPLg6Cl5M5NyYd/view?usp=sharing Maybe @[deleted] can comment if he is seeing the same transient distorted black bar across the top that I have.

I will try v10.59 when it comes out so we are comparing apples to apples. Currently I can export without the distortion with v10.36 even though there are timeline distortions on v10.52. That will be my goto work-around unless v10.59 resolves the issue.

When will v10.59 come out? Fortunately I was able to finish/publish/export my video so I succeeded in meeting my deadline.

borate

10.52 was used for the tests. My error. Glad you met the deadline.

Your glitch is somewhat different than Steve's. Since neither shows up here analysis is tough.

Just for comparison, see what version 8.45 does for you and report back.

For exporting click the Video Quality/Bitrate link and choose Off (Re-encode Video).

Steve1124

It seems to be in the export only. Sorry for the delay to your Thurs post.

borate

You tested with these settings?

Steve1124

yes

borate

Now that repairs have been made, what video adapter is in use? Right-click the Start Button, click Device Manager,

expand the Display Adapter line and tell us what it shows.

To summarize...

In Act 1 scene 1 6-16 NCH.mp4 the artifacts are evident.

My Movie_trial_0.mp4 is clean, both on the timeline and when exported at default settings from two PCs, using two different but recent VP releases.

Then exported 4-13 Part 1 speaker.mp4 - the apparent original Zoom output - Clean on both machines.

Only one tester has been able to spot artifacts, and they suggested exporting the original at the higher bitrate settings that you confirm you have tried.

So, we're at an impasse here. If Zoom has alternative bitrate or quality settings when it creates the mp4, try those.

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