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Monday, April 20, 2009

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5 Things I Learned at the Video Compression on a Mac session

Scott Simmons | 04/20

Jeff Greenberg of Future Media Concepts did a great job of presenting a lot of information in a short amount of time at his session titled Video Compression on a Mac. Here’s 5 tips I liked:

1. Job chaining in Apple Compressor is a key to better looking outputs. Under the Job menu > New Job With Target Output will allow you to scale video to a smaller resolution in its own step before doing the encode.

2. A shallow depth of field with a blurry background will compress better than deep depth of field. This made perfect sense when he said it since fast motion and busy frames always make for more blocky compression. I had never thought of that.

3. Always deinterlance in your compression software and not your editor. And never use the deinterlace filter in Apple Compressor. Always do deinterlacing in the Frame Controls tab of the inspector.

4. You can drag an old job from the History window of Compressor back into the Batch window to re-encode again.

5. MainConcept Reference is a new and promising encoding application available for Mac, Windows and Linux.

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Scott,

A couple of questions:

1. Do you remember anything more about your first point? Why does “New Job with Target Output” improve compression?

2. In reference to your 3rd point - is he referring to the Native Field Dominance field under A/V Attributes? You would select this to Progressive and get better results over using the Deinterlace filter?

Thanks!

Posted by Velo_Editor on 04/24 at 03:38 PM

1. What this does is it allows you to set a setting for the first pass, say going from HDV to ProRes for something like scaling the file down to a smaller size and then using that new ProRes (better codec than HDV) file to encode say an H264 for the web. I am going to research this better myself as I’m not 100% on it myself but that’s the basis of chaining.

2. He was talking about using the Deinterlace under the Frame Controls in the Inspector. Don’t use a deinterlace filter in FCP or the Compressor filter. Always use Frame Controls.

Posted by Scott Simmons on 04/26 at 12:16 PM

With Compressor this is true, but DV Kitchen does a great job of deinterlacing while encoding. I haven’t used Compressor in a year or so.

Here’s a review:

http://provideocoalition.com/index.php/atepper/dvkitchen_has_become_a_must_have_video_encoding_publishing_tool/

Posted by Josh Mellicker from DVcreators.net on 04/29 at 11:32 AM

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