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Neil Garrett
compression for flash conversion
on Oct 8, 2008 at 11:46:23 am

Morning all,
I was wondering if anyone had any recommendations for what compression format has the best results when converting to flash video.
My usual workflow is to export as DVPal (same as source) then convert to HQ flash, but I think the video, particularly at full screen could be crisper. I've experimented with a few other export formats but the results have either been the same or worse. Exporting direct to flash was particularly bad. If anyone's had any spectacular results doing something similar, please share!!
Thanks.


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Daniel Low
Re: compression for flash conversion
on Oct 8, 2008 at 6:12:14 pm

I'm not sure I understand your question.

Flash video can either be encoded with Sorenson Spark (lowest quality) ON2VP6 (higher quality) or H.264 (highest quality)

So ideally you want to do directly from DV to Flash H.264 using an encoder that offers great deinterlacing and scaling.

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neil garrett
Re: compression for flash conversion
on Oct 9, 2008 at 1:54:17 pm

This post got moved here from the FCP forum, (didn't spot there was a separate compression board), so workflow probably didn't make much sense at all.
It goes: DV PAL source material>FCP>Export using compressor with DVPAL settings so the end result is a mov. Then I convert the mov into flv, and publish to the web. My issue is, that although the quality ain't bad at all, I want to know if anyone can give me a recommendation about another format or codec I could export to that converts into flash really well.
Effusive thanks will of course be given to anyone with a constructive response.



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Daniel Low
Re: compression for flash conversion
on Oct 9, 2008 at 2:59:57 pm

What settings are you using for the FLV transcode.

Frame size
Data rate
Key frames

etc

__________________________________________________________________
Please post back saying what solved your problem. It could help others, and saying 'thanks' is free!


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neil garrett
Re: compression for flash conversion
on Oct 10, 2008 at 12:00:58 pm

Hi settings are

FlashCS3 version 8>High Quality>700kbps>frame rate same as source(25fps)>On2 vp6>frame placement automatic

Thanks






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Daniel Low
Re: compression for flash conversion
on Oct 10, 2008 at 1:20:56 pm

We're getting there!

You left out what frame size you're using!?

700kb/s will look great at 320x240 but like digital soup at 768x576!

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Please post back saying what solved your problem. It could help others, and saying 'thanks' is free!


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neil garrett
Re: compression for flash conversion
on Oct 10, 2008 at 4:23:46 pm

Ah that could be it - I'm using 768x576



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Daniel Low
Re: compression for flash conversion
on Oct 10, 2008 at 4:43:19 pm

I suggest you lower your frame size use this page as a guide to using div 16 frame sizes.

Of course you could up your bit rate but I think you'll be better off with a smaller frame.

__________________________________________________________________
Please post back saying what solved your problem. It could help others, and saying 'thanks' is free!


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neil garrett
Re: compression for flash conversion
on Oct 10, 2008 at 4:47:42 pm

Could be worth a go - but I'm assuming the smaller frame size is gonna look pretty grim at full-screen?



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Daniel Low
Re: compression for flash conversion
on Oct 10, 2008 at 5:45:03 pm

Well it really depends what you call full screen but Flash video NEVER looks good when scaled up. If you want high quality video that fills the screen then don't wrap it in Flash.

__________________________________________________________________
Please post back saying what solved your problem. It could help others, and saying 'thanks' is free!


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neil garrett
Re: compression for flash conversion
on Oct 10, 2008 at 5:55:18 pm

Dang. well at least it's not me doing something wrong then!
Thanks for your help, I'll let yous know if I come up with a workaround.



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