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资源说明：Quickie demo of an issue with blackmagic intensity on OS X
Blackmagic Intensity AVFoundation Issue Demo ============================================ This is a quickie demonstration of an audio sync issue with a Blackmagic Intensity Extreme and AVFoundation. It's the base case as far as I can tell. The audio lags quite a bit behind the video, and the video has an artifact at the beginning of the recording session. Although it's not demonstrated here, I see identical results with a custom setup that uses sample buffers via data output delegates. ## Using it Run the ./bm_problem_demo: ``` ./bm_problem_demo 'Blackmagic' 'Blackmagic Audio' '720p - Uncompressed 8-bit 4:2:2' '59.94 FPS' ``` The arguments are the video device, audio device, video format, and video frame rate. FPS is written as `59.94 FPS` or `60 FPS`. The others are the names that the AVFoundation driver reports. The sample output will be in `~/Movies/output.mov`.
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