[Bug 783945] v4l2src: gst-launch -e flag causes usb camera disconnection (Logitech C920)

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=783945

Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> changed:

           What    |Removed                     |Added
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 Attachment #357014|0                           |1
        is obsolete|                            |

--- Comment #13 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
Created attachment 360087
  --> https://bugzilla.gnome.org/attachment.cgi?id=360087&action=edit
v4l2bufferpool: Don't stop streaming when pool is flushing

UPDATE: This version adds manual flushing sequences required for M2M devices.

The purpose of being able to flush the buffer pool is only to
unlock any blocked operation. Doing streamoff/streamon had the
side effect of turning off and on the camera. As we do a flush_start
/ flush_stop sequence when shutting down, that would cause a really
quick sequence of streamoff/streamon/streamoff/close which was
causing some cameras to stop working.

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