Joining 1080p MKV with SD XviD

[TheCoon]

Hi.

I want to create a 1080p-vs-SD comparison video using two clips I have. One of them is 1080p MKV, and other an SD XviD file.
I want to place on the left half of the frame, the 1080p's right half, and on the right half of the frame, the SD's right half.
This way, I get one video file of the same clip, only one half is HD and the other isn't.
Then I want to save it as MKV so it can be played regularly.

How would I go upon creating something like this?

Thanks in advance for any help.

[Baldrick]

With avisynth it might be possible, Crop and Stackvertical. See for example, https://www.videohelp.com/forum/archive/two-video-clips-side-by-side-t318177.html but then you also have to crop the video in half.

[redwudz]

I really doubt you could combine a HD MKV and a SD XviD on the same screen and if you could find anything to play it if you did. If you had dual monitors it would be a bit easier. You might be able to do it with two separate software players if you turned off overlay in both, but I don't think you would have a very good comparison no matter how you do it.

On a small screen, HD won't look much different than a good quality XviD.

But someone here might have some ideas.

And welcome to our forums.

[deadrats]

Hi.

I want to create a 1080p-vs-SD comparison video using two clips I have. One of them is 1080p MKV, and other an SD XviD file.
I want to place on the left half of the frame, the 1080p's right half, and on the right half of the frame, the SD's right half.
This way, I get one video file of the same clip, only one half is HD and the other isn't.
Then I want to save it as MKV so it can be played regularly.

How would I go upon creating something like this?

Thanks in advance for any help.

what you are describing is not physically possible, a 1080p file, by definition, is 1920x1080p with square pixels, an SD file, assume a Full D1, is by definition, 720x480 with 4:3 pixels, what you basically are saying is that you want a file where each frame is simultaneously 1920x1080 with square pixels AND 720x480 with 4:3 pixels, a physical impossibility, that's like trying to draw a 2 dimensional object that is simultaneously a square and a circle.

[manono]

The SD one's an XviD so I wouldn't think it's 720x480. He could resize the XviD to the same resolution as the MKV, cut them both in half and then stack them horizontally using an AviSynth script. Then he could encode them like that. Doesn't sound too hard if TheCoon knows some AviSynth.

[mgh]

if the sd is being increased in res to match the HD res, stackhorizontal
else
overlay both on blankclip
with avisynth

[TheCoon]

Thanks for all the replies so far.
I'm still playing around with the videos, trying some of the methods mentioned above.
But before I make any more progress (or at least attempt to), and as much as I would like to accomplish this by myself, does anyone know if 1080p-vs-SD comparison videos that I can download exist? I'm looking for something just as I described in my first post. Side-by-side 1080p and SD of the same scene/clip.

Thanks again.

P.S. My SD video is 296(w) by 256(h) after I did some cropping. How can I keep it's current aspect ratio and expand it's resolution to 816(h)? I tried doing this logically (mathematically, calculated new width) but I got error code -2. Any ideas?

[TheCoon]

Okay, so using Overlay like mgh said, I got it to work pretty nicely.
Quality might have gone down just a bit in the re-encoding process, but I'm pretty satisfied with the results.

Thanks for all the help.