Changing Output resolution on MKV file

[EuropeanMan]

Hi guys,

I encoded a movie...output is MKV file @ 768/320 resolution...is there ANY way to flag it so it DISPLAYS a different SAR, like 888/368?

I don't really want to re-encode the whole bloody thing all over again...there must be some short-cut. Thanks

[neo2sonic]

mkvtoolnix. just set the display width/height you want and remux to a new mkv.

[EuropeanMan]

I've tried to do that but it STILL outputs the same 768/320...BUT If I stray AWAY from the A/R of 2.40 to something like 888/320, that shows fine :(

I'm wondering HOW it would be, if I run mkvtoolnix from a command prompt? Maybe that would work? Cuz the GUI isn't doing it for me...and if you know HOW could you please guide me? Thanks so much.

[Guest]

Just re-encode it. It's not such a big deal. Start it tonoght and it'll be done tomorrow.

[EuropeanMan]

I realise that, but I've seen SO many do this technique...I'd like to figure out WHY it doesn't work for me...

[poisondeathray]

What are you using for playback?

Try another splitter/decoder combo, or another software player - not all will accept the container signalling in .mkv

[EuropeanMan]

I'm using VLC & MPC for playback...so if THAT is the case, how do I disable/enable the container signalling in those 2 softwares?

[poisondeathray]

For mpc, haali splitter + ffdshow works with the internal splitter disabled on my system, KMPlayer also works

In mkvmerge set the DAR, not the SAR

[EuropeanMan]

The DAR is fine at 2.40...but I'd like to change the DISPLAY RESOLUTION, not the A/R!!!

[poisondeathray]

Sorry, I misunderstood. You asked for a different SAR in the 1st post.

Just use the media player options to display any dimension. Simple.

[EuropeanMan]

But I would like the FILE'S HEADER ITSELF to OUTPUT a different Resolution itself...

If I change the resolution to 864 x 320 for example...it DISPLAYS it...but when I use 868 x 360 it reverts BACK to displaying the Orig 768 x 320...why?

[J_Darnley]

The display dimensions field in matroska files are only ever used by players to correct the aspect ratio, none actually obey the dimensions part. So the solution is to make the player the size needed so that the renderer scales the image

[EuropeanMan]

Grrrrrrrrrrrrrr; forget it...I'm re-encoding it. I didn't want to. I've seen other people change the output dimensions via changing the header...I didn't understand WHY I couldn't do it...which was the WHOLE POINT of this thread.

[Adub]

Carefully read back through this thread. And read the threads where people are "chang the output dimensions" and think about exactly what they are doing. All that I have seen is people (including myself) use the signaling options to properly display their anamorphically encoded video. The "header" options, as you call them, are not designed to increase resolution, they are designed to fit a video to a certain [I]scale. As in a ratio between width and height. Not a set resolution.

[roozhou]

Most DShow-based players do not respect AR info in mkv, they only accept AR from decoders. You need to change the AR info in bitstream instead of the container.

[EuropeanMan]

Carefully read back through this thread. And read the threads where people are "chang the output dimensions" and think about exactly what they are doing. All that I have seen is people (including myself) use the signaling options to properly display their anamorphically encoded video. The "header" options, as you call them, are not designed to increase resolution, they are designed to fit a video to a certain [I]scale. As in a ratio between width and height. Not a set resolution.

That's an explanation I can live with. Thanks so much for your insight...it helped me learn something about mkv containers :)