Async Audio and Video tracks when MP4 Uploaded to Flash

	Re: Async Audio and Video tracks when MP4 Uploaded to Flash by Daniel Low on Oct 20, 2009 at 10:38:51 pm How are you serving the video? Via HTTP or via a Flash streaming server? Who hosts your site? Are they a reputable video hosting provider? Are you rescaling the video at the player/client end? What was used to encode the video? What settings were used to encode the video? Please be as detailed as possible. __________________________________________________________________ "There's no chance that the iPhone is going to get any significant market share. No chance." Steve Ballmer To USA Today: 30 April 2007 "We and Apple are neck and neck and we're chasing the two other players," Steve Ballmer, referring to Nokia and Research in Motion. October 6th 2009 Respond to this post   •   Return to posts index

	Re: Async Audio and Video tracks when MP4 Uploaded to Flash by Daniel Low on Oct 21, 2009 at 8:36:14 am [Victoria Nam] "- I edit HD footage 920/720 23.98fps in Final Cut Pro, which I then export resized at 720 by 405 in MPeg4 at 15fps, multiple pass, 700 kbs per second. " A couple of observations: You need to use a dedicated encoding package, like compressor, FCP alone is simply not up to the job Alway stick to the source frame rate, there's no point in taking 23.98fps down to 15fps, it'll cause all sorts of problems, audio sync loss probably being one of them. Encode to a frame size that is equally divisible by 16 or 8. Use this calculator to help you out: http://www.adobe.com/devnet/flash/apps/flv_bitrate_calculator/ [Victoria Nam] "Thanks for your consideration... what i've tried doing is nesting my sequence prior to export. Seems to work... but I wonder if NESTING the sequence is a half baked solution. More insight would appreciated. I also put in audio slugs where there are breaks in the track... prior to nesting sequence and exporting" Nesting will make no difference to the encode whatsoever. [Victoria Nam] "I unfortunately do not have the time/budget/inclination to export at a higher resolution or frame rate for encoding with another program. Perhaps using compressor would be ideal? I am not sure... " Using compressor, along with a frame rate of 24fps and a correct frame size will make the biggest difference to your encode, I'd be surprised if any problems persisted after that. __________________________________________________________________ "There's no chance that the iPhone is going to get any significant market share. No chance." Steve Ballmer To USA Today: 30 April 2007 "We and Apple are neck and neck and we're chasing the two other players," Steve Ballmer, referring to Nokia and Research in Motion. October 6th 2009 Respond to this post   •   Return to posts index