Showing posts with label P2. Show all posts
Showing posts with label P2. Show all posts

Tuesday, April 15, 2008

#85 NAB Conference Pt2: Sunday through Tuesday

Here are the classes I've attended over the last 3 Days

Sunday Classes
Keyframing in Avid
Understanding Podcast Metrics
Long Form editing in Avid (Documentary Production)
Main Title Design for Film and Video (in After Effects)
Mastering Media Management for Avid Editors

Monday Classes
Emerging Web 2.0 Technologies
(walked the show, saw Panasonic)
Broadcast Worfkow on Avid (Documentary Production again)

Tuesday Classes
In Depth PS CS3 for Video
In Depth Color Correction in Avid
Looked at XD Cam at Sony
Blender at Lowell - blenderlights.com

Color Correction and Avid Production. Lots of on lighting in earlier classes

I'm just giving a quick overview of my state of mind and the classes and show booths I've seen. I've included a superficial comparison between Sony's XD CAM and Panasonics HVX200 and newer HPX 170 (arriving sometime in the summer) Also info about the new AVC Panasonic.

Please excuse the pops, I chose not to rerecord so I could get this out quickly.

Wednesday, February 13, 2008

#72 Wk52 Edit Lab III

Doug Plante is instructor for this module, Edit Lab II. He is an ex-Avid employee - Avid is in Tewksbury Massachussets. He is also, according to Howard Phillips, the programs associate director, a FCP god.

This week Doug spoke about the fine points of the rough cut and fine cut

He was all business and was there to see we got to the fine cut done. There's not going to be a lot of instruction in this class. It's all going to come as he works with us individually as we massage our edits.

I had a heck of a time working with Avid, lost a whole class before I moved on to FCP 6. Now I have a problem where I upgraded to 6.02 and the school is at 6.0. and guess what, the file types are not compatible. Can you believe it?

I know, Avid files created between a long list of revisions in that software don't cause a hiccup for Avid users, but FCP apparently is very touchy. But a x.0.2 release? It's enough to make you a hater.

But I don't hate FCP, I just feel I would benefit from continuing using Avid. I know FCP well enough to learn the rest on my own. But Avid, I'm surrounded by Avid gurus and I want to take advantage of that knowledge.


I know I tend to treat this like a dog with a sock monkey, but I once again discuss the archival problems with P2 footage. You can't keep it on the card, it's too expensive. And the life of the solid state card is unknown for long term storage. Drives are a problem for long term storage. What are we going to do once we have to give up tape forever?

Thursday, January 24, 2008

#68 Wk49 On Location

This week we spent preparing for our first weekend of shooting.

I've got some comments to pass along about how to work with the talent, especially if you're crew. We've also made our lives more difficult by not having put more time into preproduction. Everything is connected, from Producer to production assistant. Things go all bass ackward if you don't communicate .


We're going to be using a Panasonic HVX200, which is an HD camera that has many benefits over the camera we've been using up to now, the Panasonic DVX100.

The first thing is that the menu controls and switches on the outside are mostly the same, so the learning curve is limited to working with the media. The HVX can record to tape, but only standard definition. To record high definition you record to solid state memory cards, called P2 cards. Here are a few reasons on why HD is a better format:
  • Images are 2 to 4 times the size of standard definition
  • There is more color in the video
  • It captures real slow motion and accelerated motion
  • The format is easy to transfer to drive, and easy to edit

Disadvantages include:
  • You can't capture to both tape and P2 card at the same time
  • There is no archival medium in HD, you wipe the card and reuse it after you transfer it to your drive
  • The P2 card is expensive
  • The life of a P2 card is unknown
  • HD footage takes up 2 to 3 times more disk space

In this episode I take a shot at explaining the difference between HD format and HDV format and frankly I don't think I made anything clear. It's useful to know, but not critical, so I'm going to lay it out here. If you need to know more, do some research on your own, otherwise, skip the next three paragraphs.

HD and HDV are capture formats. They're good formats for compressing data so you can fit as much data as possible on what ever medium they require, HD requires P2 cards, HDV can use MiniDV tapes, same as for standard definition. Both HD and HDV record the same resolution, and for all I've been told, the same 4.2.2 color space. Standard definition video records in 4.1.1 color. What qualifies as high end digital video, approaching film quality, is 4.4.4 color. I don't need to explain how it works, it's enough to understand that the capacity to capture all the available color is limited as you move from film, to HD, to SD. By the way, film is a poor second to the color capture capability of our own eyes.

HDV cameras are less expensive than HD cameras for the reasons already mentioned in the advantage list above, real slow motion, etc. HD is easier to edit immediately after capture compared to HDV due to the different compression formats they each use. HDV captures footage in groups of 15 frames, called GOP - Group Of Pictures. The first frame contains all the picture information inside the frame, then each frame following that contains only those pixels that have changed. Take a picture of a wall with HDV and the first frame contains all the info, each of the following frames have no new information and so have no additional data. That keeps the file size down so it will fit on the the tape. If a person or even a fly moves through the frame every frame that records changed information has to record it, because it's not on the first frame. But only the pixels that changed need to be recorded.

And thats fine until you need to edit the video. Then you find you can't cut inside the GOP sections, they're like a single unit. To get past this problem you need to convert the digital video to an intermediate codec that reconstitutes each frame, completely restoring the data to each frame. This of course makes the files larger, but that's the price you pay for editing this format on a digital nonlinear editor like Avid or Final Cut Pro.

Next week we shoot the bar scene Saturday and Sunday.
 
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