对于任何对此绊脚石的人，自最初发布以来，一些内部gstreamer更改可能现在需要gst.STATE_READY而不是STATE_PAUSED.令我震惊的是，似乎我遇到的一半捕获设备默认为PAL，我需要使用GST_TUNER接口进行更改.

To anyone stumbling on this, some internal gstreamer changes since this was originally posted may require gst.STATE_READY now instead of STATE_PAUSED. Tripped me up as it seems half the capture devices I encounter default to PAL and I need to use the GST_TUNER interface to change it.