I'm using Flash CS5, AS3 to create an .swf that imports an .f4v or .flv that was encoded with Adobe Media Encoder.
When I use .flv the video begins playing immediately and downloads progressively. When I use .f4v the video has to download completetly before playing. Considering all things are equal except for encoding the video as either .flv or f4v, what step am I missing that is preventing the .f4v from downloading progressively? Thanks
The issue you are likely having is that the muxer you are using isn't placing the MOOV atom before the MDAT atom. Because f4v is essentially just a MPEG-4 systems ISO file, you need to place the MOOV before MDAT so that the file can be properly indexed and progressively downloaded.