Cineframe 24 setting on FX1

Tony Tibbetts · August 30th, 2005, 05:38 PM

Quote:

Originally Posted by Jack Zhang

this is sorta off-topic but... Tony, THANKS FOR USING COLDPLAY MUSIC in your preview video! I love Coldplay!

Uhhh..wasn't my clip, just merely pointing to some great footage shot using Cineframe25. Hope my previous post did not imply that the clip was mine.

I do, however, enjoy Coldplay.mine.

Miguel Lopez · August 30th, 2005, 06:39 PM

Hello. I just read this post. And i agree with what Steve says. Maybe HDV is not the best HD codec for going up to 1080 but i tell you that recording at CF25 you get a BIG difference with "old" miniDV when going to PAL.
Color correction is infinite and the extra detail quality really enhances the images after you treat them.

I am just finishing a project that was done entirelly at CF25 because i thought the compression ratio is much better and also it will be easier for the editing (less process time, no one says this but it is important when we do not have real time video cards). Also when i want to do a slow motion i just switch from P1 to P2 settings. They are the same except for the CF, so i can quickly move from one to another.

This links will be online in an hour:

http://personales.ya.com/autodrome/mardentro.mov
http://personales.ya.com/autodrome/escaleras.mov (in this clip one shot was done with dvx100e, guess which one)

Thomas Richter · October 20th, 2005, 02:07 PM

Graeme said about MPEG 2 4:2:0 Interlaced: "it's pretty hard to describe :-)"
(a big thank you to him and also to Steven White for his explanations)

I nevertheless would like to dig to the bottom of it. I have not found one conclusive source on the web, but this forum is full of brilliant experts.

There are based on my understanding two possibilities for colour subsampling to work 4:2:0 interlaced: (each element = 1 pixel)

Version 1)

YCb Y YCb Y YCb Y ... (1st line Field 1)
YCr Y YCr Y YCr Y ... (1st line Field 2)
Y Y Y Y Y Y ... (2nd line Field 1)
Y Y Y Y Y Y ... (2nd line Field 2)
YCr Y YCr Y YCr Y ... (3rd line Field 1)
YCb Y YCb Y YCb Y ... (3rd line Field 2)
Y Y Y Y..... and so on

alternatively:

Version 2)

YCb Y YCb Y YCb Y ... (1st line Field 1)
YCb Y YCb Y YCb Y ... (1st line Field 2)
Y Y Y Y Y Y ... (2nd line Field 1)
Y Y Y Y Y Y ... (2nd line Field 2)
YCr Y YCr Y YCr Y ... (3rd line Field 1)
YCr Y YCr Y YCr Y ... (3rd line Field 2)
Y Y Y Y..... and so on

This is inferred on my knowledge of 4:2:0 progressive and some logic reasoning and video experience. Which one is correct? Version 1 or 2?

If 1 is correct, cineframe 30 or 25 lead to half the resolution (540 lines) but with 4:2:2 colour spacing.
If 2 is correct, cineframe is indeed fairly useless, as it adds very little extra compared to dropping a field in post.

This is very important to me as I am thinking of buying/renting a FX1 for chroma key work (and I am in Pal land and would be ok with 1440*540)

Your help is very much appreciated - and the results probably very interesting for other FX1 users as well

October 20th, 2005, 02:07 PM	#18
Thomas Richter Regular Crew Join Date: Apr 2005 Location: Frankfurt, Germany Posts: 181	Reviving an age old thread Graeme said about MPEG 2 4:2:0 Interlaced: "it's pretty hard to describe :-)" (a big thank you to him and also to Steven White for his explanations) I nevertheless would like to dig to the bottom of it. I have not found one conclusive source on the web, but this forum is full of brilliant experts. There are based on my understanding two possibilities for colour subsampling to work 4:2:0 interlaced: (each element = 1 pixel) Version 1) YCb Y YCb Y YCb Y ... (1st line Field 1) YCr Y YCr Y YCr Y ... (1st line Field 2) Y Y Y Y Y Y ... (2nd line Field 1) Y Y Y Y Y Y ... (2nd line Field 2) YCr Y YCr Y YCr Y ... (3rd line Field 1) YCb Y YCb Y YCb Y ... (3rd line Field 2) Y Y Y Y..... and so on alternatively: Version 2) YCb Y YCb Y YCb Y ... (1st line Field 1) YCb Y YCb Y YCb Y ... (1st line Field 2) Y Y Y Y Y Y ... (2nd line Field 1) Y Y Y Y Y Y ... (2nd line Field 2) YCr Y YCr Y YCr Y ... (3rd line Field 1) YCr Y YCr Y YCr Y ... (3rd line Field 2) Y Y Y Y..... and so on This is inferred on my knowledge of 4:2:0 progressive and some logic reasoning and video experience. Which one is correct? Version 1 or 2? If 1 is correct, cineframe 30 or 25 lead to half the resolution (540 lines) but with 4:2:2 colour spacing. If 2 is correct, cineframe is indeed fairly useless, as it adds very little extra compared to dropping a field in post. This is very important to me as I am thinking of buying/renting a FX1 for chroma key work (and I am in Pal land and would be ok with 1440*540) Your help is very much appreciated - and the results probably very interesting for other FX1 users as well

August 30th, 2005, 06:39 PM	#17
Miguel Lopez Regular Crew Join Date: Mar 2003 Location: Madrid, Spain Posts: 187	Hello. I just read this post. And i agree with what Steve says. Maybe HDV is not the best HD codec for going up to 1080 but i tell you that recording at CF25 you get a BIG difference with "old" miniDV when going to PAL. Color correction is infinite and the extra detail quality really enhances the images after you treat them. I am just finishing a project that was done entirelly at CF25 because i thought the compression ratio is much better and also it will be easier for the editing (less process time, no one says this but it is important when we do not have real time video cards). Also when i want to do a slow motion i just switch from P1 to P2 settings. They are the same except for the CF, so i can quickly move from one to another. This links will be online in an hour: http://personales.ya.com/autodrome/mardentro.mov http://personales.ya.com/autodrome/escaleras.mov (in this clip one shot was done with dvx100e, guess which one)