INTERACT FORUM
More => Old Versions => JRiver Media Center 21 for Windows => Topic started by: RD James on April 05, 2016, 03:11:47 am
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I have an anamorphic video that's supposed to be played in a 1.50:1 aspect ratio.
How can I set that as the aspect ratio in JRiver?
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I'm most familiar with anamorphic from DVDs. In a DVD, a 1.78:1 (16:9) frame is horizontally compressed to fit into a 1.33:1 (4:3) frame. On playback this is reversed.
I'm not sure how MC figures out to do this; there must be a flag somewhere that triggers it because it all works transparently.
What was the source aspect ratio of your video? What aspect ratio was it squeezed into? I guess it doesn't really matter unless you can force MC to do a certain "unsqueezing" by telling it a specific ratio.
Have you considered post processing it with an external tool?
Brian.
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It's a 1.78:1 video that should be played back at 1.50:1
JRiver has aspect ratio correction but only a very short list to choose from.
It seems to set a value in the playback info tag, but I can't decipher what they're using to set it at 1.50:1 myself.
With 1.33:1 correction I get (6:196612)
With 1.78:1 correction I get (6:589840)
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That is a compound number to save space, 1.33:1 is 4:3 internally -> 4 + (3 << 16) -> 196612
I suppose we could offer a way to enter custom ratios, it should support any ratio just fine.
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It's a 1.78:1 video that should be played back at 1.50:1
It's reverse anamorphic then? It needs to be squeezed on playback, not unsqueezed?
Brian.
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It's reverse anamorphic then? It needs to be squeezed on playback, not unsqueezed?
Well I thought anamorphic just meant that it's encoded in a different aspect ratio than the one it's intended to be viewed in, I don't think that being anamorphic requires a particular ratio.
That is a compound number to save space, 1.33:1 is 4:3 internally -> 4 + (3 << 16) -> 196612
I suppose we could offer a way to enter custom ratios, it should support any ratio just fine.
Some way to support custom ratios, however it's implemented, would be great.
I wish I understood what you meant by a "compound number" though, as I don't understand what you wrote at all.
I don't know if it's just something that is advanced math, or something basic which I was never taught.
I remember my parents expressing that math had changed the most of any subject from what they were taught at the same age.
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Some way to support custom ratios, however it's implemented, would be great.
It is - in a way - see Hilton's post on custom resolution not long ago...
2.35:1 Ratio Resolution in MC21 works a treat!
...just do the math ;)
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I wish I understood what you meant by a "compound number" though, as I don't understand what you wrote at all.
I don't know if it's just something that is advanced math, or something basic which I was never taught.
<< is left shift, which basically means "multiply by 2 to the power of X". Admittedly is not an operation that comes up in school math often, I guess.
So you could rewrite that to: 4 + (3 * 2^16), which google can even calculate for you now, just replace 4 and 3, say with 3 and 2 for 1.5:1
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Ah is it a programmer thing then?
That seems to be working for 1.50:1 (3:2) now, thanks!
It's not the most convenient way to set the aspect ratio, but it does the job.
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I suppose we could offer a way to enter custom ratios, it should support any ratio just fine.
Yes, it will be really helpful.