Codec support by Flash version.

Support for audio and video compression formats in Flash Player and in Flash Video^[1]^[9]^[14]^[16]^[18]
Flash Player version	Released	File format	Video compression formats	Audio compression formats
6	2002	SWF	Sorenson Spark, Screen video	MP3, ADPCM, Nellymoser
7	2003	SWF, FLV	Sorenson Spark, Screen video	MP3, ADPCM, Nellymoser
8	2005	SWF, FLV	On2 VP6, Sorenson Spark, Screen video, Screen video 2	MP3, ADPCM, Nellymoser
9.0.115.0	2007	SWF, FLV	On2 VP6, Sorenson Spark, Screen video, Screen video 2, H.264^[*]	MP3, ADPCM, Nellymoser, AAC^[*]
		SWF, F4V, ISO base media file format	H.264	AAC, MP3
10	2008	SWF, FLV	On2 VP6, Sorenson Spark, Screen video, Screen video 2, H.264^[*]	MP3, ADPCM, Nellymoser, Speex, AAC^[*]
		SWF, F4V, ISO base media file format	H.264	AAC, MP3

Categories: HowTos