Windows DirectShow input device.
-DirectShow support is enabled when FFmpeg is built with mingw-w64.
+DirectShow support is enabled when FFmpeg is built with the mingw-w64 project.
Currently only audio and video devices are supported.
Multiple devices may be opened as separate inputs, but they may also be
Some usage examples of the video4linux2 devices with ffmpeg and ffplay:
+The time base for the timestamps is 1 microsecond. Depending on the kernel
+version and configuration, the timestamps may be derived from the real time
+clock (origin at the Unix Epoch) or the monotonic clock (origin usually at
+boot time, unaffected by NTP or manual changes to the clock). The
+@option{-timestamps abs} or @option{-ts abs} option can be used to force
+conversion into the real time clock.
+
Note that if FFmpeg is build with v4l-utils support ("--enable-libv4l2"
option), it will always be used.
@example