| The Rapid development of the Internet makes more and more videos uploaded. With the rise of webcast, online video is taking place of television, and becoming the preferred way to enjoy videos. Some users want to save live shows might not be easy to watch again after live broadcast, some users fear the video site to delete their favorite video, some users just wants to save the video in case of poor or no speed of network conditions. All of these reasons will make some users want to save the video to their hard disc.But most video sites don't provide download services, third-party video download software is valid only for a few specific sites typically. Recording network video by screencast software becomes a simple and universal solution.Currently, the mainstream screencast software in Mac OS X is designed to grab the screen display and user actions. If you want to use these software for network video recording, you must ensure that the window plays the video not moved or blocked by other windows during the recording. Meanwhile, other audio playback during the recording will be recorded along with the video sound to the video file generated, which is obviously inconvenient.In order to meet the special needs of network video screen recording, it is necessary to study the single process audio capture technique based on API Hook and unobstructed single window screenshot technique in Mac OS X. And using the above techniques to make multitask screen recording software. Users can perform multiple screencast tasks simultaneously using the software. All video playback windows are hidden and voice of the video is muted during the process of screen recording. Best of all, the voice of all tasks will not disturb each other. Task management interface and browser can automatically choose the video area are also developed, make this software quite simple and convenient to use. |
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