How's the 25p mode on the HVR-A1? at DVinfo.net

Bram Corstjens · October 31st, 2006, 05:07 PM

Couldn't find an good answer for this particular model: How is the 25 progressive mode on this cam? (I live in PAL land)

This site shows how the FX-1 and Z1 do 25p: http://www.dvfilm.com/fx1/#CF25

(They lose some resolution, but DVfilm maker doesn't remove all interlaced artifacts...)

Is the 25p mode on the A1 the same?

Phil Bloom · October 31st, 2006, 05:12 PM

I haven't actually tried it with mine yet but I remember reading some articles saying it is much better than the z1 due to the cmos chip but you still lose the vertical resolution...

Bram Corstjens · October 31st, 2006, 05:44 PM

Hi Philip,

Just watched your video (the demo video) Looking at the motion, it seems like you used frame blend?

To bad it's just 640x480 so I can't judge it resolution wise. It nice looking though!

I suppose you live in NTSC land? If so , you'll probably can't helpt me with a normal 1440x1080 interlaced frame and one from 25p right?

Bram Corstjens · October 31st, 2006, 06:31 PM

From a BBC R&D document: http://www.bbc.co.uk/rd/pubs/whp/whp034-add19.shtml

The HVR-A1 uses one single field (from the interlaced 50I or 60i) and interpolates that to 1440x1080.

So that would be exactly the same as just shooting interlaced and then de-interlacing in post. De-interlacing in post probably gives better results due to the smart deinterlacers available.

October 31st, 2006, 05:07 PM	#1
Bram Corstjens Regular Crew Join Date: Mar 2003 Location: Netherlands Posts: 126	How's the 25p mode on the HVR-A1? Couldn't find an good answer for this particular model: How is the 25 progressive mode on this cam? (I live in PAL land) This site shows how the FX-1 and Z1 do 25p: http://www.dvfilm.com/fx1/#CF25 (They lose some resolution, but DVfilm maker doesn't remove all interlaced artifacts...) Is the 25p mode on the A1 the same?

October 31st, 2006, 05:12 PM	#2
Phil Bloom Trustee Join Date: Aug 2006 Location: London UK Posts: 1,939	I haven't actually tried it with mine yet but I remember reading some articles saying it is much better than the z1 due to the cmos chip but you still lose the vertical resolution... __________________ Philip Bloom Cinematographer, Director, Filmmaker www.philipbloom.net

October 31st, 2006, 05:44 PM	#3
Bram Corstjens Regular Crew Join Date: Mar 2003 Location: Netherlands Posts: 126	Hi Philip, Just watched your video (the demo video) Looking at the motion, it seems like you used frame blend? To bad it's just 640x480 so I can't judge it resolution wise. It nice looking though! I suppose you live in NTSC land? If so , you'll probably can't helpt me with a normal 1440x1080 interlaced frame and one from 25p right?

October 31st, 2006, 06:31 PM	#4
Bram Corstjens Regular Crew Join Date: Mar 2003 Location: Netherlands Posts: 126	From a BBC R&D document: http://www.bbc.co.uk/rd/pubs/whp/whp034-add19.shtml The HVR-A1 uses one single field (from the interlaced 50I or 60i) and interpolates that to 1440x1080. So that would be exactly the same as just shooting interlaced and then de-interlacing in post. De-interlacing in post probably gives better results due to the smart deinterlacers available.