lavd/qtkit: Support choosing the input device by index or by name.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 18 insertions, 1 deletions

diff --git a/doc/indevs.texi b/doc/indevs.texi
index 68905ae0b0..2de724d326 100644
--- a/doc/indevs.texi
+++ b/doc/indevs.texi
@@ -535,12 +535,29 @@ ffmpeg -f pulse -i default /tmp/pulse.wav
 
 QTKit input device.
 
-The filename passed as input is unused. The default device will be chosen.
+The filename passed as input is parsed to contain either a device name or index.
+The device index can also be given by using -video_device_index.
+A given device index will override any given device name.
+If the desired device consists of numbers only, use -video_device_index to identify it.
+The default device will be chosen if an empty string  or the device name "default" is given.
+The available devices can be enumerated by using -list_devices.
 
 @example
 ffmpeg -f qtkit -i "0" out.mpg
 @end example
 
+@example
+ffmpeg -f qtkit -video_device_index 0 -i "" out.mpg
+@end example
+
+@example
+ffmpeg -f qtkit -i "default" out.mpg
+@end example
+
+@example
+ffmpeg -f qtkit -list_devices true -i ""
+@end example
+
 @section sndio
 
 sndio input device.