Hi, The Flex/AIR project I'm working recently need to play full screen high quality H.264 videos in second monitor screen (usually a projector, maybe a large monitor sometime, such as 1680x1050). I run into trouble with video performance we can get.
I know Adobe Media Player make full screen video playback. Our application is larger than AMP though. There's a main window in main screen, control video playback as well as other contents such as full screen Flash files loaded. The performance when I testing on 1680x1050 screen with Macbook core 2 duo (with Flex Builder running), camcorder shot videos can play mostly smooth, while as parts of videos panning with still images slowly, in these parts can never feel smooth enough. (The application when I tested with released version in slow 2G cpu / 2G memory Vista computer, it run 80% CPU around when video playing.) What I'm doing on video: Use an standalone Window component to contain a FLVPlayback (CS4 version), run full screen display mode on its stage alone. (Didn't set 'fullScreenSourceRect', as I tried, it cause worse performance significantly) Video encode settings: 960x540, Field Oder - none (no interlace), profile - high, level - 4.1, frame rate - should be 30 or 29.97 fps, target bitrate - 1.5 mbps, max bitrate - 2 mbps. My question is: - Does each AIR nativeWindow run its own thread, or the whole AIR application running a single thread? - What's the best practices for full screen high quality video in AIR? Anything I can improve? - How to GC after video played? I used videoplayer.clear(), but cannot run videoplayer.close(), as I test when try to load a new video quickly, it throw an error. - What's the best HD video performance we can get in multiple windows Flex/AIR application? Any help is greatly appreciated. George
