As far as I know -- the predominat library is Video4Linux -- however I have not tried it myself, but the list of applications using/supporting it is impressive.
Addition: For Multi media Encoding GStreamer is probably one of the most used frameworks.
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据我所知——主要的库是 Video4Linux ——但是我自己还没有尝试过，但使用/支持它的应用程序列表令人印象深刻。
添加：
对于多媒体编码 GStreamer 可能是最常用的框架之一。
As far as I know -- the predominat library is Video4Linux -- however I have not tried it myself, but the list of applications using/supporting it is impressive.
Addition:
For Multi media Encoding GStreamer is probably one of the most used frameworks.