New tool: Power Load Calculator

We've just released a new online tool to the resources section of our site - Power Load Calculator.

Power Load Calculator allows you to calculate the load on a particular circuit when certain devices are plugged in. For example, you can calculate whether or not the circuit breakers in a location can handle the lights you want to use and if not, the size of the generator that needs to be hired. This sort of thing is better discovered during pre-production and not on the day of shooting, so this calculator is very useful in that regard.

You can also calculate the minimum circuit breaker size for a given power load which is very useful if you are upgrading a building's power supply in order to accommodate your needs.

As usual, there is also an iPhone edition available.

Check out our resources section for more tools.

"The filter failed to render" error fix

Just saw an interesting fix for the big red "The filter ____________ failed to render" message some people have been getting in Final Cut Pro.



I seem to get it randomly every now and again but this is a useful fix for those who were experiencing it on a permanent basis. Pity you need to lose a monitor though.

Activity Monitor 101: System memory

Activity Monitor (located in Applications/Utilities) is a great tool for monitoring system resource usage, and is a great way of locating rendering bottlenecks in your system.

In particular, the Memory tab shows you a great deal of information (note: this is from Leopard; Tiger's Activity Monitor looks a little different).



But what does this information mean? What exactly is wired memory? Here is a breakdown of what each item in the Memory tab refers to.

(For clarification, a swap file is a file on disk used to store currently inactive memory in order to make room in the system memory for active applications. For example, if you have Firefox running and you minimize it and then open iTunes, there is a good chance that a lot of Firefox's memory will be written to disk and the space freed will be assigned to iTunes. When you restore the Firefox window, it will copy the data from the disk back into memory again. Your hard disk is much slower than your memory chips so it is best to keep swap file usage to a minimum. This can be achieved by adding more memory to your system.)

Free: Unused memory that is available for any application to use.

Wired: Memory used by the operating system that cannot be touched by other applications. This memory cannot be written to a swap file.

Active: Memory currently used by applications. Note that this might not represent all of the memory used, as some may be stored in swap files.

Inactive: Memory stored from an application that is no longer running. OS X stores application data in a cache so that you can quickly relaunch applications a second time. If you start running out of free memory, the operating system will automatically start using inactive memory.

To clear inactive memory manually, go to Applications/Utilities/Terminal. When it launches, type purge and press enter. Note: it takes several seconds to process.

Used: Memory currently in use that cannot be immediately written to a swap file or allocated elsewhere.

VM size: The size of the swap file.

Page Ins / Page Outs: How often OS X is reading data from and writing to the swap file.

When deciding if you need an upgrade, consider the following:

• Are your page ins/outs approximately equal to one another? Are they increasing rapidly?
• Is the majority of your memory wired?
• Do you have 10% or less of your memory free?

If the answer to any of the above questions is yes, consider more memory.

How to fully remove Final Cut Server

Apple has just released an Applecare document listing the files installed by Final Cut Server and detailing how to remove them. This follows on from the difficulties a lot of people had with removing it due to the large number of files it places in hidden system folders. This was further complicated by Apple not wanting fixes made public until they had a chance to address the issue themselves.

I will use this information to add support within FCS Remover shortly.

ATI Radeon 3870 due next month for Mac Pro?

AppleInsider is reporting that the ATI Radeon HD 3870 will be due "next month" for both current and legacy Mac Pros.

Details are scarce (and possibly fictional) but the card is said to include 512 MB of DDR4 memory and support for CrossFire mode (linking two cards up to boost graphics performance, usually in video games) within Windows.

More importantly for professional users, it provides a mid-range alternative to NVIDIA's GeForce 8800 GT which has ProApp performance issues.

Color users are particularly advised to invest in an ATI card because they support rendering in 10-, 12- and 16-bit modes in addition to NVIDIA's 8- and 32-bit offerings. The NVIDIA card gives you a choice between best and worst, with no in-between values. This can cause problems for people wanting something higher than 8-bit without the massive performance hit when working in 32-bit mode.

At present, the only way to get a mid-range ATI card in your new Mac Pro is to buy one of the ones from the old Mac Pros and update the firmware, although this has the caveat that you have to install it in an older Mac Pro first in order to update it. This news would appear to be the answer to many professional users' prayers, although I hope that Apple introduce a driver update for those that have already upgraded to the 8800 GT.

Digital Rebellion 1 year old today

Digital Rebellion is exactly a year old today! And unlike a lot of start-ups, we're still here and going strong (amazingly).

It's been a year of great things for us. Perfect Sport is now complete and is doing very well at festivals, and our free online resources are proving popular. Looking forward, we have some more projects in the pipeline and I hope I can make an announcement towards the end of the year regarding these.

We've always encouraged comments and feedback and I feel this has been important to our success so I encourage that further. Either use our contact form or use the feedback link at the bottom of every page.

I'm not going out to celebrate or anything, but if you are planning on going to a bar, you are more than welcome to use this as an excuse for the wife :p

Baz Luhrmann offers free filmmaking course on iTunes

Baz Luhrmann (director of Romeo + Juliet, Moulin Rouge and the infamous Chanel commercial with Nicole Kidman) is now offering a free filmmaking course entitled Set to Screen in video podcast form on the iTunes store.

It lasts until October and each podcast features a specific aspect of the filmmaking process (e.g. set design, cinematography, etc) on Baz's new feature film, Australia, starring Hugh Jackman and Nicole Kidman. The first one, On Set Photography, is available now. Peter Jackson did something similar on King Kong which ended up being very successful.

If you're a high school or college student, five of the podcasts come with a challenge at the end. Complete the challenge, post it to the Apple Student Gallery and you could be in for the chance of winning an iPod shuffle, iPod nano, iPod touch, or a MacBook Pro. A trip for two to Australia is also up for grabs, and the top prize in the final challenge is a trip to Australia with a chance to meet Baz and travel with him on the movie's promotional tour. Your project will also be featured on the movie's DVD release.

For those who aren't students, I think the podcasts are still very interesting regardless. I have a lot of respect for Baz and his work so I will be subscribing to this for sure and no doubt hanging on his every word.

[via CamcorderInfo]

CalDigit SAN announced at NAB

I just got this in my inbox courtesy of the LAFCPUG mailing list.

Right now at Digital Rebellion we're running Xserve RAIDs on Xsan 1.4. I love these things but they're loud, they kick out a lot of heat and they're no longer being made. They're still pretty good and they're not out of date yet but I have been looking at alternatives with the future in mind.

CalDigit, famous for their hardware RAID cards, demonstrated such an alternative at NAB. One major departure from the Xserve RAIDs and their replacement, the Promise VTrak E-Class, is the fact that it does not use 2 or 4 Gb Fibre Channel cables (which cost around $80 per cable) to transmit data. It uses ePCIe which allows it to transmit data at speeds of up to 20 Gbps and allows for very long cable lengths of up to 300m.

With the recent announcement of the entry-level Scarlet camera, the demand for real-time access to extremely high resolution streams looks set to increase dramatically and, luckily, the CalDigit SAN has the bandwidth to transfer multiple 2K streams in real-time.

Uniquely, there is also an ePCIe ExpressCard device to allow laptop users (MacBook Pro only) to access the SAN. This is not currently available for fibre-based networks.

There's nothing on their site as of yet but they have a press release out and it looks like more details will be announced nearer the shipping date, which is currently unknown. This is definitely something I'm keeping my eye on.

New tool: Lens Angle Calc

We've just released a new online tool: Lens Angle Calc. This allows you to calculate the horizontal or vertical lens angle from a given frame width / height and lens focal length.

This is very useful because it allows you to plan your shoot on paper and work out exactly where the camera should be placed before you even arrive on set - saving valuable time and avoiding awkward situations in small locations where you can't see the subject on your widest lens with your back against the wall. It is invaluable for effects work, where everything must be planned out in meticulous detail.

It can also work out the focal length of the lens from a given lens angle and frame width or height - very useful for working out which lens should be used in a certain situation.

Lens Angle Calc
Lens Angle Calc (iPhone version)

See our other web applications here.