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Flash encoding to specific file size

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Nick Long
Flash encoding to specific file size
on Feb 4, 2009 at 5:07:23 pm

Hi,

I'm using Episode to encode an SWF file for a client. For various reasons i've got a file size limit of 512kb

The video is 5:46 long and is made up of still images only changing to a voice over (like a very simple video podcast or narrated powerpoint presentation)

I've managed to get the file size down to 836kb after tweaking as many options as i can. Episode just won't let me go any further down the scale.

Is there anyone who can help me with this or give me some advice?

Many Thanks in advance,

Nick

P.S. below are the settings I currently have:

Episode v5.0.1
output format: Flash (swf)
Video encoder: Flash 8 video (VP6-E)
Average rate: 15kbit/s
peak rate: 15kbits/s
Frame skip: 0
VBV size: 2
Natural Keyframes only
High Quality 2-pass CBR
sharpness: 0

Fixed Framerate: 1.75fps

Deinterlace: complete

resize: 550 x 400

Audio encoder: Lame MP3
Bitrate based
Bitrate: 16Kbit/s
Channels: mono
Sample rate: 11025Hz



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Robert Longwell
Re: Flash encoding to specific file size
on Feb 4, 2009 at 11:18:14 pm

I'm honestly amazed you got the file size as small as you did.

Robert Longwell


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Nick Long
Re: Flash encoding to specific file size
on Feb 5, 2009 at 12:28:19 am

Tell me about it! I know it's possible due to a previous podcasty thing that was done a while back and provided to me. It was 504kb!

I have noticed that "ZLib compressed" is "YES" in the example file but "NO" in my file. I've no idea what this is...

Nick

Nick Long - Video Editor

n.long@mac.com


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Aaron Bredon
Re: Flash encoding to specific file size
on Feb 13, 2009 at 7:02:43 pm

The previous SWF file you mentioned might have been created in Flash as a slideshow with JPEG stills inserted at specific frames. This would help make it smaller as each still images would only be included once. This would also explain the zlib compression, as that is an option when exporting from Flash.



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Nick Long
Re: Flash encoding to specific file size
on Feb 13, 2009 at 8:03:23 pm

Hi Aaron,

that's pretty much what I figured.

Many thanks for all the help.

Nick

Nick Long - Video Editor

n.long@mac.com


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