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Shaving mb's off video...

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Paul Zwicker
Shaving mb's off video...
on Sep 25, 2013 at 7:33:47 pm

I am using Compressor 3.05 to try to get a 1.2 GB .mov video to 100 MB or less. The file is an h264 .mov file about 10 minutes in length.

I have been using the Apple Devices Presets for h.264 for iPod-640x480 and reducing the bitrate as I run tests.

I get the file down to 102 MB and cannot seem to drop it any lower with bitrate settings. Bitrate was 1400kb and reduced it to 102 MB.

I was hoping to keep it @ 640x480 since the 320x240 looks like mud.

Suggestions?

ZwickFlicks LLC
Wisconsin, US
Sony PMW EX3
MacPro
Final Cut Pro 6.6
http://www.zwickflicks.com


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Rich Rubasch
Re: Shaving mb's off video...
on Sep 25, 2013 at 8:38:05 pm

Sometimes I use Quicktime Player to export and encode a file....when you click on the video settings for an H264 encode look in the top right corner and check "Restrict to" and choose around 900kbps or so...adjust until you get the size you want.

You can also adjust the size in the size dialog to just about any 4x3 size....is this a 4x3 encode or 16:9?

Rich Rubasch
Tilt Media Inc.
Video Production, Post, Studio Sound Stage
Founder/President/Editor/Designer/Animator
http://www.tiltmedia.com


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Paul Zwicker
Re: Shaving mb's off video...
on Sep 25, 2013 at 8:45:49 pm

Hi Rich,

16x9...I'll keep trying. I just got so close with that last setting.
I'll try going your route one more time.
I have not tried restricting the kbs that far as yet.

Thanks for the help.

Paul

ZwickFlicks LLC
Wisconsin, US
Sony PMW EX3
MacPro
Final Cut Pro 6.6
http://www.zwickflicks.com


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Ivan Myles
Re: Shaving mb's off video...
on Sep 25, 2013 at 9:56:29 pm

Consider using custom settings instead of the iPod preset. For example, exporting your 16:9 video as 640x360 requires lower bitrate than 640x480.

A 10-minute 100MB file will have a total data rate of approximately 1300 kbps including audio and overhead. I have been able to get good quality 640x360-30p video with a total bitrate of 1250kbps using the following settings in QuickTime Pro:

- MP4
- H.264
- 640x360
- 24/25/30fps as required
- Baseline profile
- Single pass
- 1080 kbps average bitrate
- Auto key frame distance
- AAC audio at 160 kbps (128 kbps should work well, too)
- Streaming enabled if required; file size is smaller when disabled

These settings should work on most mobile devices. Encode a short test file to check, though.

Hope that helps.


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Rich Rubasch
Re: Shaving mb's off video...
on Sep 26, 2013 at 9:10:08 pm

As a note I always get better results with the "Best" setting which is a two-pass encode.

I do tend to hover around 1000-1200 kbps on a 640 x 360. A 640 x 480 encode will not be 16x9.

Rich Rubasch
Tilt Media Inc.
Video Production, Post, Studio Sound Stage
Founder/President/Editor/Designer/Animator
http://www.tiltmedia.com


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Paul Zwicker
Re: Shaving mb's off video...
on Sep 27, 2013 at 8:45:50 pm

Rich,

I've not been in the office to check my latest settings.
I usually use 640 x 360, but cannot seem to set the settings to break that 100 mg barrier.

Thanks,
Paul

ZwickFlicks LLC
Wisconsin, US
Sony PMW EX3
MacPro
Final Cut Pro 6.6
http://www.zwickflicks.com


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