World Exclusive First HVX200 Footage..PART 2

Amazing! I'm super pumped! Thanks guys!

It played back perfectly, but when I full screened it, there were this lines of "tearing" all over the video. Is that a scaling problem with the codec or something? It was totally unexceptable (and I don't use that word loosely). But at it's native size it was perfect!
 
"It was totally unexceptable (and I don't use that word loosely)."

Well, you shouldn't use it at all 'cause it doesn't exist.
 
Jarred Land said:
Thanks for the additional Mirror SalaTar.
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call me crazy, but why dont you just put up a torrent with the zip archive of all compressed clips and a few half GB native clips?

afterall, it was designed for exactly these kind of things.

++ chris ++

ps: thanks for the nice work of all people involved.
pps: oh, and first post btw ;)
 
thanks Zem.. thats what i plan to do.. but we dont have the permission to release the native clips yet, so we cant.
 
Jarred Land said:
thanks Zem.. thats what i plan to do.. but we dont have the permission to release the native clips yet, so we cant.
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i see.. i must have been one of the few lucky ones who got the clip in the brief time it was up then ;)
can't quite understand who would want to prevent them from being posted (panasonic?) as the HVX clearly is going to eat the HDV camp for lunch, but i'm sure there's a good reason.
please excuse my snippy comment and congrats again.

++ chris ++
 
zem said:
i see.. i must have been one of the few lucky ones who got the clip in the brief time it was up then ;)
can't quite understand who would want to prevent them from being posted (panasonic?) as the HVX clearly is going to eat the HDV camp for lunch, but i'm sure there's a good reason.
please excuse my snippy comment and congrats again.

++ chris ++
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Its a little thing called Copyrights and Distribution agreements.. that clip was uploaded by the apple dude by mistake when I was out, and people mirrored it around before I got home to take it down. Panasonic also didnt want it up until an actual real codec was released so everyone could watch it properly.
 
hehe good stuff barry, I knew it was him..as a matter of fact we have a shoot with him for COX tomorrow I belive...hehe..good guy..forgot his buddy's name but they are quite hilarious actors. and yes the footage looks great..needless to say.
 
I hate you both Jarred and Barry......you guys witnessed the HVX in action...lucky!

Those shots were really nice though...madd props to the DP's.

Hey Barry..next time im in Vegas...im gonna find your house and use ur HVX when you buy one :grin:

If only I had the uncompressed footage...i would play it at full 1080 rezz on my plazzma..dont get me wrong..the compression still looks nice...but it would be alllot better on a nice HDTV.

Good work men!
 
Xenophon said:
Hi, this is my first post here

You can use Gabest Media Player Classic. It plays a lot better than the windows media player.

There appears to be some confusion on DVCProHD:

Recording at 720p results in a 960x720 image at 4:2:2, effective color resolution is 480x720 and only uses a small part of the 100mbit/sec rate. 60fps uses the full rate.

Recording at 1080p 30fps (or 24p) results in 1280x1080 image at 4:2:2, effective color resolution is 640x1080 and it uses the full 100mbits/sec rate.

Recording at 1080p 25fps results in 1440x1080 image at 4:2:2, effective color resolution is 720x1080 and it also uses the full 100mbits/sec rate.

The 1080p to 720p path is superior to 720p because we get a true 1280x720 image (from the 1280x1080). If we record at 720p we get only 960x720 which needs 3/4 oversampling (x1,333 horizontally) to get the 1280x720 output which gives a softer image. So the 1080 to 720p is true 4:2:2. The 720p direct is not. The image is much softer. We also get better quality because we downsample from a higher resolution. Many compression artifacts are removed by this process since it is equavalent of filtering.

The cool thing is a 1080p to 480p conversion. This gives an 720x480 image with 640x480 color that has 9:8:8 color sampling! It is effectively 9:8:8 because we have enough Y resolution but have to oversample x1.125 the color differences' resolution. 9:8:8 is almost as good as uncompressed which would be 9:9:9. Try downsampling the 1080p to 480p and examining at 100%. Even after all the compression the image is pixel perfect. No visible artifacts at all.

The PAL version using this method will do 1080p to 576p with 720 horizontal pixels (1440 horizontal pixels are recorded on the format instead of 1280 on the pal). So that will be 4:4:4 and exactly the same quality with uncompressed! There is a chance that it will be 1280 instead of 1440 though. Both 3/4 and 2/3 resampling appear on DVCPROHD specs on the net for Pal. Can't be sure.

Also, all this goes through 6,7:1 compression. But color sampling is equivalent to no color sampling at all on pal.

So, downsampling from 1080p gives SD output of extreme quality. Normal dv has 1/4 the color information and compression artifacts from 5:1 compression. The DVCPROHD compression artifacts at 6,7:1 are actually higher at full res, but are removed by the downsampling to SD process.

btw, I noticed 5 pixels of purple fridging on the original sample with the wide setting on the lens. On both the original clips. We didn't expect perfect lens at this quality did we? The zoomed in scenes on the new sample look perfect to me.
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Great read Hmm... Any more thoughts one this. I must admit that the 1080P downsampled to 480P desert/guitar video going around here looks amazing even though it's gone through multiple codecs.

After thinking more about this, you have to wonder if the 1080P downsampled to 720P may be worth checking out.

We'll have to run some tests when we get some raw samples, or our cameras for that matter :)

Steve
 
ok, this is the new benchmark :) thanks guys for the work, it is cool to see the first from the hvx, it is huge, awesome
 
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