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Re: What is the benefit of XDCam versus straight hard drive?

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Michael Phillips
Re: What is the benefit of XDCam versus straight hard drive?
on Dec 18, 2015 at 2:00:05 pm

The offline/online choice in workflow is usually due to several reasons that force that decision and not because people want to:

1. Codec is not native to MC - XDCAM, DNxHD, ProRes and a few others are native, meaning they are part of Avid's coded library and can be Avid managed in the Avid MediaFile structure. Also, because they are native, the decode playback performance is also optimized. Non-native codecs can be used directly, but when they no longer perform in real time to expectations is unknown.

2. Performance - related to #1. How complex is the timeline? Multicam? etc. As you expect more streams in real time, non-native codecs will have less performance.

3. Storage - Is the storage fast enough and big enough to hold everything? For example, it is one thing to have one 4TB drive and four 1TB drives in a RAID config as the more spindles give you more speed. How the drive or drives are connected is a factor - USB2, 3, etc. If the data rate is low enough, then the requirements go down. Also some productions like to bring dailies on to set and lower data rates allow a single drive to hold more media without the speed issue.

Understanding when and where the bottlenecks occur is key to getting a good start in post. Many can get away with native AMA linking - many others can't.


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