Glitches when using the "Speed" tool in MEP2016

PF_01 wrote on 5/5/2017, 2:34 AM

Hello. Hoping someone can help me.

I'm using Magic Movie Edit Pro 2016. I'm using Windows 10 with the following specs: 3.5 GHz Intel Core i7 processor, 16 GB 1600 MHz DDR3 memory, NVIDIA GeForce GTX 775M 2048 MB graphics.

So I'm trying to edit together a series of videos that each include an identical introduction at the beginning. I'm using multiple movies within the same project, and each movie has what should be my identical introduction at the start of it. I'm simply trying to copy and paste the completed introduction from movie to movie.

This 40-second introduction is basically a series of slowed-down short clips, each one immediately followed by a still image of the last frame. Each segment is very short - about four seconds in total - of which about the first 1.5 seconds is a video clip played at 0.5 speed using the "speed" tool; and the last 2.5 seconds is a still image of the last frame of the clip, created by placing the playback marker at the end of the clip, right-clicking, and selecting "create still image at playback marker" option.

So each section is basically a slowed-down video clip, followed by a still image of the last frame of the clip.

Here's the problem: BOTH the video clips and the still images "glitch". Every four or more frames, there's a single frame that appears to be positioned a couple of pixels down and to the left of the rest, resulting in a "jerkiness" in the finished video that is extremely noticeable. This happens sporadically, every few frames. It doesn't happen consistently - there are ten four-second segments that I've described above in the 40-second introduction, and this issue generally only affects three or four of them.

Some other relevant information:

- In the first video I created - practically speaking, the first movie in the project - the issue didn't happen at all.

- All the videos are different "movies" within the same project. As such, I've tried copying the original introduction from the first movie over to the subsequent ones. This doesn't work - the "glitched" frames just appear in the new movies.

- Since exporting the first movie, some of its frames have also become "glitched". I have no idea how this has happened.

- Removing the "glitched" areas and completely recreating them from the source video does not fix the issue. The glitches just come back (although not always in the same place).

- The source material is not "glitched". (Since the glitches appear randomly in the Magix software window and are inconsistent there, I don't see how it could be a problem with the source material at all.)

- The "glitches" don't appear anywhere else in the video - and the only thing I've done with the introduction that I've not used elsewhere is the "speed" tool.

- The glitches appear in the editing window - they're not something that's added when "exporting" the videos.

- I've removed every piece of editing from the affected areas apart from the "speed" change, which is necessary for the effect that I want. This doesn't stop the glitched frames from appearing.

I'm assuming that this may be some kind of bug with the "speed" tool, since it's the only thing I've used on the affected areas of the videos that I haven't used elsewhere. But I could be on the wrong track. In either case, does anybody have any idea how to stop it from happening?

Regards, DDL.

Comments

johnebaker wrote on 5/5/2017, 3:54 AM

The computer may be struggling with the playback of the speed reduction section as this is processor intensive especially if hardware acceleration (HWA) is not working - HWA CUDA acceleration on GTX 775 may not be supported.

Did you set the following options:

Speed control - Interpolate intermediate frames - this is very important to prevent flickering, otherwise the perceived framerate drops by the reduction in speed factor.
Export - Apply anti-interlace - important - stops flickering in still images.
Program settings, Import/export tab - Hardware acceleration for preview if possible.
Project settings - Automatically create proxy files - this may be necessary as to improve smoothness of playback in the preview monitor.

HTH

John EB

PF_01 wrote on 5/5/2017, 8:19 AM

Thanks, John, but the problem isn't with framerate, it's with the position of random frames on the screen. They're literally shifted a pixel or two out of position. There are no frame drops. I've tried suggestions 1, 2 and 4, but I'll try #3, just in case it's some kind of rendering bug that might be fixed by this.

The "out of place" frames actually appear in the editing window (even though there's apparently no reason why they should be there). I can move the playback marker along the video area, frame by frame, and some of those frames will be in a different position to the rest - even in the "still image".

this isn't just something that happens in the preview or export. Whatever this bug is, it's affecting random frames in the editing window itself.

johnebaker wrote on 5/5/2017, 8:32 AM

What are the following:

Version number and full name of MEP as found under Help, About . . . ?
Framerate of the source video?
Framerate of the project?
Source video format, resolution and is it interleaved or progressive?

John EB

browj2 wrote on 5/5/2017, 8:52 AM

Hi,

In the Effects tab, View/Animation, Size/Position, are the still images at position 0,0? The video part as well?

Is it possible that sometimes the still image that you create is not the same frame as the last one in the video? By this I mean that there could be a frame or two missing before the still image, thus creating a jump. Or, perhaps this happens by changing the speed as images would have to be created, and maybe occasionally there is a frame dropped.

If you do manage to get one set up properly, I suggest that you export your intro to a Magix mxv file and use that in the other movies. This would also make rendering quicker.