AVC-Intra codec

[Lars Wikstrom]

I have a question about that too. The AVC is the same as the H.264, is it not? It looks nice but it is highly compressed. It can’t compare to the DVCPRO codec for capture can it?

-Lars

[Barry Green]

The HVX200 itself can’t use any AVC codec. They’d have to make a new model that either incorporated an AVC/h.264 compression card in it, or allowed it to work with the optional AVC-Intra codec board that they’re marketing for the “big” cameras.

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[Lars Wikstrom]

What is the major benifit of using this codec? With heavy compression I would not use it for green screening.Also isn’t the H264 codec part of the Mpeg family?

Is that a better format then the DVCPRO codec?

-Lars

[Peter Corbett]

It’s not heavy compression. It will be 100mbs on the HPX2100 and will look fantastic up against DVCPROHD.

Peter Corbett
Powerhouse Productions
Australia
http://www.php.com.au

[Lars Wikstrom]

if AVC is H264 then it is a heavy compressed coedec. Hands down the image looks awasome that h264 makes and the file sizes are mind blowing for the results. I will be curious what 100mbs will look like since it can get images that are very small and look great.

-Lars

[Peter Corbett]

Panasonic’s AVC-Intra is intra-frame H.264 compression so there is no long-GOP and is also recordable to 10-bit in the camera. At 50mbs you get DVCPROHD qaulity at half the data space of DVCPROHD. Based upon our tests with 100mbit H.264, compression artifacts are virtually non-existant. Sure H.264 at 2mbs or 5mbs is “highly compressed” but 100mbs is not highly compressed. The opposite in fact.

Peter

Peter Corbett
Powerhouse Productions
Australia
http://www.php.com.au

[Lars Wikstrom]

ahhh, I see, Intresting. I wonder what the benfits would be to intraframe H264? It seems like you would loose the befefits of H264 since the codec is normaly a GOP codec. I would be intreseted in seeing some clips shot with this codec.

-lars

[Arnie Schlissel]

It’s basically the same benefits that you get with Sony’s IMX codecs. Intra-frame means compression within a single frame. Inter-frame means compression between several frames, IOW a group of pictures.

Arnie
Now in post: Peristroika, a film by Slava Tsukerman
https://www.arniepix.com/blog

[Peter Corbett]

Trust me. In 10-bit 100mbs, the quality is mind-blowing. Also look for Grass Valley’s Infinity with 100mbs JPEG2000 intra-frame compression. I have real doubts about the longevity of Sony’s HDV/XDCAM HD long-GOP methodology.

Peter

Peter Corbett
Powerhouse Productions
Australia
http://www.php.com.au

[Stevenbradford]

You should have doubts. It’s entirely based on Memory being very very expensive. Otherwise, why would you use it? Every other application has stopped using heavy compression for origination, still photography, audio, etc.

Remember Stacker and the other utilities for saving hard drive space on a PC by compressing standard wp and other data files? When was the last time anyone used one of those programs?

Steven Bradford
School of Film, Video, Visual Effects
Collins College
Tempe Arizona