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Old 5th July 2009, 08:42   #41  |  Link
Ghitulescu
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If we discuss analog, there is one value set: 711 samples per line.

But 711 / 16 is 44.4375, that means it's no good for MPEG encoders. The next 16MOD values are 704 and 720. So far I know MiniDV is 704 (some camcorders fill however the missing 16 pixels with black) while the DVD allows both (720 seems to be more present).

The difference in PAR is negligible between 704 and 720. Important is not to change inutilly the PAR/DAR, the rest is pure philosophy.
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Old 5th July 2009, 11:11   #42  |  Link
maldino800
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Hello.
Can you tell me step by step please,how I can change the reseluotion 720p( 1280 * 544 )mkv file to full reselution 720p(1280 * 720) ???

Last edited by maldino800; 5th July 2009 at 11:52.
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Old 5th July 2009, 13:13   #43  |  Link
Ghitulescu
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Originally Posted by maldino800 View Post
Hello.
Can you tell me step by step please, how I can change the resolution 720p (1280 * 544) mkv file to full resolution 720p (1280 * 720) ???
AddBorders() in Vdub and relatives or use uncropMKV by deank. Reencoding is necessary.
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Old 5th July 2009, 17:51   #44  |  Link
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AddBorders() in Vdub and relatives or use uncropMKV by deank. Reencoding is necessary.
But vdub can open mkv files?how?
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Old 5th July 2009, 18:12   #45  |  Link
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Originally Posted by maldino800 View Post
But vdub can open mkv files?how?
The answer is here -> http://forum.doom9.org/forumdisplay.php?f=22
or here -> http://www.videohelp.com/forum/archi...b-t332447.html

For uncropMKV -> http://forum.doom9.org/showthread.php?t=145905.
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Old 5th July 2009, 18:22   #46  |  Link
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Ok.thanks for help.
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Old 7th July 2009, 21:16   #47  |  Link
Jeremy Duncan
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I updated the guide, method one with this editing:

"- Assuming your source resolution is 720, 480 or 720, 576 Widescreen, And there is 8 pixel black bars on the left and right side of the video, change the 720 to 704 using the down arrow to the left of 720. Pressing it once will change the resolution to 704.

- Assuming the video is 720, 480 or 720, 576 Widescreen and there is no 8 pixel black bars on the left and right side, then keep the resolution to 720."

I hope it's correct.
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Old 9th July 2009, 13:03   #48  |  Link
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Quote:
Originally Posted by Ghitulescu View Post
If we discuss analog, there is one value set: 711 samples per line.

But 711 / 16 is 44.4375, that means it's no good for MPEG encoders. The next 16MOD values are 704 and 720. So far I know MiniDV is 704 (some camcorders fill however the missing 16 pixels with black) while the DVD allows both (720 seems to be more present).

The difference in PAR is negligible between 704 and 720. Important is not to change inutilly the PAR/DAR, the rest is pure philosophy.
PAL analogue is 702 and a bit x 575, but 704x576 is an exactly equivalent PAR+DAR.

DV is always 720, and not always (or even mostly) with black borders.

Cheers,
David.
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Old 9th July 2009, 22:41   #49  |  Link
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Originally Posted by 2Bdecided View Post
PAL analogue is 702 and a bit x 575, but 704x576 is an exactly equivalent PAR+DAR.
You mean pal interlaced when you mention pal analogue?
What would be the source of this analogue: tv, dvd?

And you mean 704 if it has 8 pixels on the right and left side cropped off of 720 making the 704 resolution?
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Old 10th July 2009, 09:28   #50  |  Link
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You mean pal interlaced when you mention pal analogue?
What would be the source of this analogue: tv, dvd?
Any video signal correctly generated and stored in the pre-DVD era

Cheers,
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Old 10th July 2009, 12:08   #51  |  Link
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Quote:
Originally Posted by 2Bdecided View Post
PAL analogue is 702 and a bit x 575, but 704x576 is an exactly equivalent PAR+DAR.

DV is always 720, and not always (or even mostly) with black borders.

Cheers,
David.
You're right I've checked again, after 9 years my memory faded a lot.

Around 2000 I got my first MiniDV camcorder, a Sharp, that recorded 720x576 wherein the leftmost 16 pixels were black. I've asked in one of the newly created digital forums and I was told this story, I didn't care too much since that was inside the overscan anyway. Since then I never inquired the values again, because I do all my work in hardware.
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Old 11th July 2009, 08:09   #52  |  Link
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Quote:
Originally Posted by Ghitulescu View Post
If we discuss analog, there is one value set: 711 samples per line.
Your numbers are correct for NTSC, 711 is the visible part of image line captured with the standard ITU's sample frequency 13.5 MHz (unified for PAL/NTSC) and the standard number of samples per line (720 in both cases). Vertically there are 485 active lines in analog video and those 2 numbers correspond to the standard 4:3 AR. As in case of PAL, the number of captured lines was rounded to a multiple of 16 (by cropping to 480). So in case of NTSC the standard captured image can't be 4:3 by visible part (unless cropped after capture), while 704x480 area within it represents the standard AR. If stored as 720x480, cropping 711 to 704 is not necessary (but useful for encoding).
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