MKV Conversion & Usage

[fang508]

Hello everyone, I seem to be having a small issue with using MKVs. I like to make clips out of them sometimes, and sometimes I need to speed the clips up a bit. However, when I increase the speed, it becomes somewhat choppy. This does not happen to any other format I convert from, just MKVs. I have used multiple video editing programs, and multiple conversion programs to no avail. Perhaps I am doing something wrong?

[jman98]

Welcome, but like most new users, you mistakenly believe the less you tell us, the better off you are.

Here's what you think you told us - My car has a problem that whenever I apply the brakes, I hear a squeal and smell a burning odor. I've noticed that I don't stop as quickly or in as short a distance as I used to. It's been about 5 years since I had any break work done.

This is what your post above really says - My car has a problem.

Once you under the disconnect between what you think you said and what you really said, maybe you can fix it and provide useful information. Just saying you've used multiple programs isn't good enough if you really want help.

[fang508]

Hmm, yeah you are right. I should of been much more detailed. I'l rephrase.

I am converting Anime episodes that are in .mkv to .avi or .mpeg (depending on the program I use to edit with). The program I use to edit clips together is Ulead Mediastudio pro 8. Yes I know that it is somewhat dated, but the new versions' GUI is completely different and I have trouble figuring it out. Once I have the episodes converted, I add them into my timeline. I clip them accordingly, sometimes I must speed up the video to fit in a certain spot (I am making a Anime Music Video). When I increase the speed of a clip 140+% it begins to show choppyness instead of smoothness. This becomes progressively worse the faster you go. However, all of this is isolated only to MKVs that have been converted, video that is in .avi works perfectly. The MKV formats I convert from are AVC/MPEG4/H.264. The program I use to convert with is called Mediacoder.

[hello_hello]

Not being a MediaCoder user I'll throw in 2 cents worth.

Generally when you change the frame rate, conversion programs do it by dropping/adding/blending frames. MKV supports variable frame rate video and I think much Anime uses a variable frame rate (it might be worth checking the problem MKVs with MediaInfo). Converting variable frame rate to constant frame rate is problematic in the first place, but by increasing the frame rate you're possible getting MediaCoder to convert it to a constant frame rate and also speed it up..... hence the mess. Either that or Ulead MediaStudio doesn't support variable frame rate and it's making the video choppy.

I don't convert anime so I can't give advice as to whether you can do what you're trying to do all that successfully, but someone else might be able to help. At least it might point you in the right direction regarding the "why" though. Can I be so bold as to ask why you're changing the frame rate so much?

[fang508]

The reason the frame rate changes is because sometimes i must speed up, or slow down, specific clips in the timeline. you know, making a anime music video. as in mix and match up parts to go along with the music .etc? Kinda hard for me to describe, If you are into doing it you would probably understand right away lol.

but I will check up on that variable FPS thing.