NAB musings -- AVCHD + Vegas workflow

Guy S. wrote on 4/22/2008, 12:54 PM
HDV has always seemed like interim format; eventually we'd see a full-HD consumer/prosumer format. AVCHD could be such a format but for its data rate.

I went to NAB wondering if anyone would announce a higher bitrate AVCHD camera. Panasonic did, showing a non-functioning 24Mbps unit based on the HVX-200 and priced at around $4500. If this meets expected performance milestones, this will likely become an industry standard camera. And if trends hold true, Sony will likely announce a competitor next year, with Canon following sometime after that.

The issue is how to efficiently edit this footage. I've experimented with AVCHD on my quad core workstation, and though it worked, it was quite slow compared to HDV (even with HDV I can't even get better than Preview 1/2 when using CC or Draft when using Magic Bullet).

In the short term, I understand that we can expect help in the form of a tool from VASST. I suppose that capturing via an Intensity card would work, too. I also wouldn't be surprised if Cineform were looking at this as well. In the long term, however, I'm not sure that file conversion will be the best answer. I suspect that for many projects a native AVCHD workflow will be the preferred way to work, the way that native HDV is now.

Speaking with the folks at Cineform, I learned that their Prospect HD plugin for Premiere actually replaces Premiere's playback and rendering engine, and that's how they get realtime performance.

Another 3rd party developer announced a Premiere plugin that will provide real time AVCHD/H.264 performance using a Quadro card's GPU (scrubbing a multi-layer timeline, CC, scaling, colorspace conversion, etc.).

My hope is that Vegas engineers will utilize the GPU to improve both HDV and AVCHD performance and/or open up their architecture to further accommodate 3rd party developers who will.

Comments

LSHorwitz wrote on 4/22/2008, 7:18 PM
HDV has been around for several years, and it too had a performance bump at NAB with a 35 MBit/sec camera. I would hardly think of it as "an interim format", and have my own serious doubts as to whether AVCHD will ever become a replacement for HDV.

The editing burden is huge for AVCHD. My QX9650 Intel Extreme Quad Core can cut it, but nothing else worked fast enough to really allow for adequate workflow.

I know that transcoding to an interim codec provides a method to allow AVCHD to be used with programs like Vegas on other processors, but this is time wasting both as an input / ingress as well as in rendering.

Why do you feel AVCHD will be the replacement for HDV? What, if any, industry announcement has led you to that conclusion?

Thanks,

Larry
Guy S. wrote on 4/23/2008, 11:33 AM
<<Why do you feel AVCHD will be the replacement for HDV? What, if any, industry announcement has led you to that conclusion?>>

Strictly opinion. I've been reading the tea leaves for years so that I can plan my hardware/software transitions and get a head start on the learning curve.

I've always questioned the staying power of a format that is less than full HD, especially since 1080p is rapidly becoming the standard for consumer TVs..

It doesn't seem logical that Sony would release new HDV cameras if a new format is to follow soon, but they've done it with Hi-8, DV, and Betacam, so there is a precedent. I didn't realize that Sony had bumped the HDV CODEC to 35Mbps, that should definitely improve quality.

At NAB I saw footage from Panasonic's low-end "Pro" AVCHD camera and was impressed. The footage had some movement, but it was slow and smooth, obviously withing the range of what the 17Mbps CODEC could handle. Their new camera will use 24Mbps which, at least on paper, should provide more image data than 25Mbps HDV.

Even if 35Mbps HDV is a significant improvement, history indicates that as a group, enough of us will be swayed by the Full HD message that eventually industry momentum will swing that way, as long as HDV 35 isn't clearly superior.

What that means to me is that I will avoid purchasing new HDV equipment and begin learning about the AVCHD format and workflows so that I'll be able to make a smooth transition like I did with HDV.

At work I will likely use HDV for another 2 years, as we invested in a V1U/DR-60 just last May, but would look to replace our HC-3 with an AVCHD unit as soon as there's an adequate workflow (I've been spoiled by tapeless with the DR-60).

For my personal equipment, I will look at adopting AVCHD within the next 12 months. Hopefully there will be an excellent book on the subject to help guide us (hint, hint).
Guy S. wrote on 4/23/2008, 3:58 PM
<Book is already out. :-)>

Great, thanks!

I purchased your HDV book at last year's NAB show. It was invaluable in helping me understand how HDV would improve the look of my standard def DVD's and to understand the workflows involved. It helped make the process smoother than expected.