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Old 17th March 2013, 12:19   #3061  |  Link
kalehrl
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I've been doing the Formula1 captures from the same channel last year and never once did I get vertical resolution below 400:

Second screenshot:
http://tinypic.com/view.php?pic=33bl62o&s=6
Yoda and MeGUI don't agree.
I don't use ITU-R.
Here is a sample:
https://mega.co.nz/#!RlpCgC6R!HBQB2R...ycIOZvs8CNbDHM

Last edited by kalehrl; 17th March 2013 at 12:24.
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Old 17th March 2013, 13:10   #3062  |  Link
Shevek
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Quote:
Originally Posted by Zathor View Post
704x394 is correct for 16:9
Am I missing something?

This is how I calculate: 704 / 16 * 9 = 396
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Old 17th March 2013, 13:36   #3063  |  Link
Zathor
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Quote:
Originally Posted by Shevek View Post
Am I missing something?
This is how I calculate: 704 / 16 * 9 = 396
Correct! For 704x576 with 16:9 you have 704x396 with 1:1.
But this source uses cropping (2 top, 2 bottom) and therefore it is 704x394.

Quote:
Originally Posted by kalehrl View Post
Yoda and MeGUI don't agree.
They both agree if you choose the same AR on both sides:
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Old 17th March 2013, 18:54   #3064  |  Link
kalehrl
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Quote:
They both agree if you choose the same AR on both sides:
If I check the custom dar coefficients they're the same.
But I don't understand why it is not enough to just choose 'pal 16:9'? Why the need for custom dar?
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Old 17th March 2013, 19:22   #3065  |  Link
Zathor
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Pal 16:9 seems to be a different DAR than 16:9. Don't know what is beeing used at all.
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Old 17th March 2013, 19:39   #3066  |  Link
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The preset "Pal 16:9" in Yoda's calculator is probably not an "irrespective"* DAR, but an SAR instead?!

The reported input SAR is ~1.75:1, which seems to assume that skewed 720 pixels width are deskewed 1024 pixels width (1024:576 = 16:9).
__

"Irrespective" in the meaning of MPEG2 = ISO/IEC 13818-2: No matter which width (352, 480, 544, 704, 720,... : 576 pixels as PAL) is encoded, it has to be deskewed to a DAR of 16:9 for displaying (576 * 16 : 9 = 1024).
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Last edited by LigH; 17th March 2013 at 19:46.
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Old 17th March 2013, 19:46   #3067  |  Link
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Small update:
Code:
2308 [AVS Script Creator] added detailed analysis result to the log
2307 [AVS Script Creator] fixed not applying film when manually choosing "Partially film"
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Old 18th March 2013, 15:43   #3068  |  Link
kalehrl
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Quote:
Originally Posted by LigH View Post
The preset "Pal 16:9" in Yoda's calculator is probably not an "irrespective"* DAR, but an SAR instead?!

The reported input SAR is ~1.75:1, which seems to assume that skewed 720 pixels width are deskewed 1024 pixels width (1024:576 = 16:9).
__

"Irrespective" in the meaning of MPEG2 = ISO/IEC 13818-2: No matter which width (352, 480, 544, 704, 720,... : 576 pixels as PAL) is encoded, it has to be deskewed to a DAR of 16:9 for displaying (576 * 16 : 9 = 1024).
I still think Yoda is right and MeGUI is wrong.
My source is 704x576 not 720x576.
If I choose Pal 16:9 (720x576), crop 2 pixels top and 2 bottom, uncheck ITU-R, move the slider to 704 width and use mod2, I get 704x394 - exactly the same as MeGUI.
If I choose Pal 16:9 (but this time choose 704x576), crop 2 pixels top and 2 bottom, uncheck ITU-R, move the slider to 704 width and use mod2, I get 704x402.
I think MeGUI wrongly assumes that all 16:9 PAL recordings are 720x576.
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Old 18th March 2013, 22:25   #3069  |  Link
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Yoda makes the 720x576 assumption, as best as I can tell. Without cropping....

Choose 720x576 and Yoda displays the source aspect ratio as 1.77777 and the resize as 704x396.
Choose 704x576 and Yoda displays the source aspect ratio as 1.73827 and the resize as 704x404.
If you choose 704x576 you have to physically tell it to use a custom aspect ratio of 16:9 in order for it to display the source aspect ratio as 1.77777 and resize it to 704x396.

I couldn't download your sample for some reason (the download kept stopping) but MeGUI works the same way. You could open a video with a resolution of 800x350 and if you physically select 16:9 as the input aspect ratio, the resize will still be 704x396. It sounds like MeGUI might be getting the 704x576 aspect ratio correct at 16:9, but for Yoda you need to tell it you want 704x576 to be 16:9.
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Old 18th March 2013, 22:35   #3070  |  Link
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Another way to look at it....
If you select 720x576 using Yoda, the source aspect ratio is displayed as 1.77777 (non ITU).
704x576 shows a source aspect ratio of 1.73827
Now go back to 720x576 again but crop 16 pixels from a side. The display aspect ratio is once again 1.73827.

Yoda has treated the 720x576 video as 16:9, but to Yoda, 704x576 is exactly the same as 720x576 with 16 pixels cropped from the sides, which obviously isn't 16:9 any more. Therefore if you want Yoda to treat 704x576 as 16:9, you need to use a custom display aspect ratio and tell it to.
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Old 18th March 2013, 23:06   #3071  |  Link
Zathor
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Quote:
Originally Posted by kalehrl View Post
I think MeGUI wrongly assumes that all 16:9 PAL recordings are 720x576.
No, it does not assume that. As you can see your source is detected as plain 16:9.
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Old 19th March 2013, 15:09   #3072  |  Link
kalehrl
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Quote:
Originally Posted by hello_hello View Post
Yoda makes the 720x576 assumption, as best as I can tell. Without cropping....

Choose 720x576 and Yoda displays the source aspect ratio as 1.77777 and the resize as 704x396.
Choose 704x576 and Yoda displays the source aspect ratio as 1.73827 and the resize as 704x404.
If you choose 704x576 you have to physically tell it to use a custom aspect ratio of 16:9 in order for it to display the source aspect ratio as 1.77777 and resize it to 704x396.

I couldn't download your sample for some reason (the download kept stopping) but MeGUI works the same way. You could open a video with a resolution of 800x350 and if you physically select 16:9 as the input aspect ratio, the resize will still be 704x396. It sounds like MeGUI might be getting the 704x576 aspect ratio correct at 16:9, but for Yoda you need to tell it you want 704x576 to be 16:9.
Thank you.
I think I understand it now.
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Old 19th March 2013, 18:46   #3073  |  Link
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Quote:
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Hi Zathor, I add this ticket in megui page https://sourceforge.net/p/megui/feature-requests/499/

Thanks in advance.
Maybe, this free tool could be helpful for that ticket. http://www.mega-nerd.com/libsndfile/
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Old 20th March 2013, 03:35   #3074  |  Link
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Originally Posted by Overdrive80 View Post
Maybe, this free tool could be helpful for that ticket. http://www.mega-nerd.com/libsndfile/
Like I say before we don't need libsndfile to write WAV files from AviSynth output.
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Old 21st March 2013, 04:39   #3075  |  Link
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in 2296 it seems that in the AVS script creator, selecting Clever anamorphic, overcrop, no longer copies the correct DAR over into the final settings after the script is created, resulting in an encode without a DAR set. Resize does copy the DAR however.
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Old 21st March 2013, 06:45   #3076  |  Link
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Originally Posted by tebasuna51 View Post
Like I say before we don't need libsndfile to write WAV files from AviSynth output.
Ahhh, ok... I didn read it. I agree that behappy be joined with megui, would be big advance. ^^
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Old 21st March 2013, 15:38   #3077  |  Link
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Seems that the anamorphic/dar flag does not get set at all regardless of whether resize or crop is selected in 2296 actually. Using x264 and mkv. Works fine in 2287.
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Old 21st March 2013, 22:00   #3078  |  Link
Zathor
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Quote:
Originally Posted by tfa View Post
in 2296 it seems that in the AVS script creator, selecting Clever anamorphic, overcrop, no longer copies the correct DAR over into the final settings after the script is created, resulting in an encode without a DAR set. Resize does copy the DAR however.
Please try the recent development build. There were those changes:
Code:
2302 [AVS Script Creator] fixed wrong resize values in some cases if using cropping without anamorphic encoding
2300 [MediaInfo] fixed wrong aspect ratio if using anamorphic AVS files
2297 [MediaInfo] fixed wrong aspect ratio in some cases
EDIT: But wait, I will release a new stable. It is about time...

Last edited by Zathor; 21st March 2013 at 22:39.
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Old 22nd March 2013, 04:23   #3079  |  Link
tfa
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Latest build works with anamorphic, but I notice that if I select overcrop, it says my aspect error is -17.72569 regardless of how much is cropped. If I switch to resize, it shows 0.00518 (for example). In older versions, the value would only change slightly. I'm not sure that the aspect error really applies to anamorphic. The values seem to stay the same from encode to encode, always .00518 or -17.72569

Last edited by tfa; 22nd March 2013 at 06:05.
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Old 23rd March 2013, 11:33   #3080  |  Link
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Thanks - will be fixed in 2309
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