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17th March 2013, 12:19 | #3061 | Link |
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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. |
17th March 2013, 13:36 | #3063 | Link | |
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But this source uses cropping (2 top, 2 bottom) and therefore it is 704x394. They both agree if you choose the same AR on both sides: |
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17th March 2013, 18:54 | #3064 | Link | |
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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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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). Last edited by LigH; 17th March 2013 at 19:46. |
18th March 2013, 15:43 | #3068 | Link | |
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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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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. |
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. |
19th March 2013, 15:09 | #3072 | Link | |
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I think I understand it now. |
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19th March 2013, 18:46 | #3073 | Link | |
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20th March 2013, 03:35 | #3074 | Link | |
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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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21st March 2013, 06:45 | #3076 | Link | |
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21st March 2013, 22:00 | #3078 | Link | |
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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 Last edited by Zathor; 21st March 2013 at 22:39. |
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22nd March 2013, 04:23 | #3079 | Link |
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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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