Editing Adobe Flash (section)

===Flash Audio===
Flash Audio is most commonly encoded in [[MP3]]{{Citation needed|date=October 2024}}; however, it can also use [[ADPCM]] (an IMA ADPCM variation that can use 2, 3, 4, or 5 bits per sample), Nellymoser ([[Nellymoser Asao Codec]]) and [[Speex]] audio codecs. Flash allows sample rates of 5512, 11025, 22050 and 44100&nbsp;Hz (but Speex uses 16&nbsp;kHz and Nellymoser Asao can also use 8&nbsp;kHz and 16&nbsp;kHz).<ref>{{Cite web |title=SWF FILE FORMAT SPECIFICATION |publisher=Adobe |url=https://open-flash.github.io/mirrors/swf-spec-19.pdf |access-date=December 28, 2024 |archive-url=https://web.archive.org/web/20240825075536/https://open-flash.github.io/mirrors/swf-spec-19.pdf |archive-date=August 25, 2024 |url-status=live}}</ref> It cannot have a 48&nbsp;kHz audio sample rate, which is the standard TV and DVD sample rate.{{Citation needed|date=October 2024}}

On August 20, 2007, Adobe announced on its blog that with Update 3 of Flash Player 9, Flash Video will also implement some parts of the [[MPEG-4]] international standards.<ref name=MP4>{{cite web
 |url=http://www.kaourantin.net/2007/08/what-just-happened-to-video-on-web_20.html
 |title=What just happened to video on the web
 |publisher=Adobe
 |url-status=dead
 |archive-url=https://web.archive.org/web/20100106113036/http://www.kaourantin.net/2007/08/what-just-happened-to-video-on-web_20.html
 |archive-date=January 6, 2010
 |access-date=September 28, 2007
 }}</ref> Specifically, Flash Player will work with video compressed in [[H.264]] (MPEG-4 Part 10), audio compressed using [[Advanced Audio Coding|AAC]] (MPEG-4 Part 3), the F4V, MP4 (MPEG-4 Part 14), M4V, M4A, [[3GP]], and [[.mov|MOV]] multimedia [[Container format (digital)|container formats]], [[3GPP]] [[Timed Text]] specification (MPEG-4 Part 17), which is a standardized subtitle format and partial parsing capability for the "ilst" atom, which is the [[ID3]] equivalent [[iTunes]] uses to store [[metadata]]. [[MPEG-4 Part 2]] and [[H.263]] will not work in F4V file format. Adobe also announced that it will be gradually moving away from the FLV format to the standard ISO base media file format ([[MPEG-4 Part 12]]) owing to functional limits with the FLV structure when streaming H.264. The final release of the Flash Player implementing some parts of MPEG-4 standards had become available in Fall 2007.<ref>{{cite web |url=https://www.adobe.com/aboutadobe/pressroom/pressreleases/200708/082107FlashPlayer.html |title=Adobe Press release on MPEG-4 in Flash Player 9 |publisher=Adobe.com |access-date=December 4, 2010 |archive-url=https://web.archive.org/web/20101203071112/http://www.adobe.com/aboutadobe/pressroom/pressreleases/200708/082107FlashPlayer.html |archive-date=December 3, 2010 |url-status=dead |df=mdy-all }}</ref>

Adobe Flash Player 10.1 does not have acoustic echo cancellation, unlike the VoIP offerings of Skype and Google Voice, making this and earlier versions of Flash less suitable for group calling or meetings. Flash Player 10.3 Beta incorporates acoustic echo cancellation.