 <p>Flex provide a JPEG encoder. You can use that to compress the bitmap images and send them to the server, where you can that stitch them together using ffmpeg.</p> <p><a href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/graphics/codec/JPEGEncoder.html" rel="nofollow">http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/graphics/codec/JPEGEncoder.html</a></p>