SONY TRV950E does MEGAPIXEL 25P !!!

Barry Green · August 4th, 2003, 07:21 PM

I was just responding to this quote:

"Bathe in the megapixel glory of 25P - Movie time!!!"

I thought it sounded interesting, so I went and tested it. And it is categorically untrue to say that you're getting either megapixel or standard-resolution 25P out of the firewire port.

"Perhaps you are forgetting that in memory mode the camera is a STILL camera connected to the DV port."

No, not forgetting it at all. Just trying to verify whatever it is that comes out of that firewire port, because there have been claims about megapixel progressive footage since the first TRV900 -- it was first reported back on global-dvc years ago.

The camera appears to be using the full surface of the chip, then resizing that to 720x480 (or 720x576) and then piping it down the firewire port. Along the way it's losing substantial resolution, much more so than would be expected by a simple resizing, so I said it looks like what you'd get if you de-interlaced regular video.

"What would be the point of interlacing a still image only to de-interlace it again so that it meets with your declaration?"

It's interlaced because all DV is interlaced. Even the 24P and 30P from the DVX100 and SDX900 is stored on tape as interlaced video. If it complies with the DV spec (as that firewire stream clearly does) then it's stored interlaced.

Hey, however it's processing it, interlacing or not, is really rather irrelevant, I was just speculating. The question was: do you get high-resolution, progressive-scan video at full frame rate by putting the camera in "memory" mode and recording the firewire port stream? And the answer is, for whatever reason, "no". You get WHAT APPEARS TO BE de-interlaced video (but you do get a slightly wider field of view).

August 4th, 2003, 07:21 PM	#16
Barry Green Barry Wan Kenobi Join Date: Jul 2003 Location: North Carolina Posts: 3,863	I was just responding to this quote: "Bathe in the megapixel glory of 25P - Movie time!!!" I thought it sounded interesting, so I went and tested it. And it is categorically untrue to say that you're getting either megapixel or standard-resolution 25P out of the firewire port. "Perhaps you are forgetting that in memory mode the camera is a STILL camera connected to the DV port." No, not forgetting it at all. Just trying to verify whatever it is that comes out of that firewire port, because there have been claims about megapixel progressive footage since the first TRV900 -- it was first reported back on global-dvc years ago. The camera appears to be using the full surface of the chip, then resizing that to 720x480 (or 720x576) and then piping it down the firewire port. Along the way it's losing substantial resolution, much more so than would be expected by a simple resizing, so I said it looks like what you'd get if you de-interlaced regular video. "What would be the point of interlacing a still image only to de-interlace it again so that it meets with your declaration?" It's interlaced because all DV is interlaced. Even the 24P and 30P from the DVX100 and SDX900 is stored on tape as interlaced video. If it complies with the DV spec (as that firewire stream clearly does) then it's stored interlaced. Hey, however it's processing it, interlacing or not, is really rather irrelevant, I was just speculating. The question was: do you get high-resolution, progressive-scan video at full frame rate by putting the camera in "memory" mode and recording the firewire port stream? And the answer is, for whatever reason, "no". You get WHAT APPEARS TO BE de-interlaced video (but you do get a slightly wider field of view).