how do i increase bitrate of quicktime export

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how do i increase bitrate of quicktime export

I am trying to export a recorded Keynote slideshow as Quicktime H.264 for use on Brightcove's video platform.

The file output has a video bitrate of between 300 and 500 kbits per second, which is very low (I need more like 5,000). Even when I select the option for High Quality, or set a "limit" to the bitrate of 5,000 (or more) I still get 300-500. I presume this is because the simple slide transitions don't "need" a high bitrate, however this is causing problems for me with Brightcove's multi-rendition functionality, so I need to somehow force Keynote to export at higher bitrate.

To be clear, the file I'm creating looks and sounds absolutely fine, it's just I need a higher bitrate for Brightcove.

Any help hugely appreciated.

Posted on Nov 6, 2012 1:39 AM

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Answer 1

Nov 6, 2012 4:30 AM in response to robm247

use custom settings

file > export > Quictime > from the dropdown menu : custom

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Answer 2

robm247 Author

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Nov 6, 2012 5:03 AM in response to Gary Scotland

Hi Gary

Thanks - that's what I am using:

Custom

Video: full size (then using video settings menu to specify frame rate, keyframe frequency, frame reordering, data rate restriction and compressor quality).

As I say though, the data rate can only be restricted (not have a target rate)

Rob

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Answer 3

Nov 6, 2012 12:03 PM in response to robm247

Iv found that Exporting from Keynote to QT is automatic and uses"standard" data rates.

The work around I have found is to export this to a broadcast complient video file, like HDV, and than export that in QT Pro to H264 where you can set the data rate.

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Answer 4

robm247 Author

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Nov 6, 2012 12:19 PM in response to Gary Scotland

That sounds perfect - could you be more specific about the settings you use for export plz?

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