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Diffstat (limited to 'doc/indevs.texi')
| -rw-r--r-- | doc/indevs.texi | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/indevs.texi b/doc/indevs.texi index d34583326d..8e862ff6bc 100644 --- a/doc/indevs.texi +++ b/doc/indevs.texi @@ -146,6 +146,8 @@ devices and the command @file{v4l-info} for Video4Linux2 devices. If the size for the device is set to 0x0, the input device will try to autodetect the size to use. +Only for the video4linux2 device, if the frame rate is set to 0/0 the +input device will use the frame rate value already set in the driver. Video4Linux support is deprecated since Linux 2.6.30, and will be dropped in later versions. @@ -153,13 +155,16 @@ dropped in later versions. Follow some usage examples of the video4linux devices with the ff* tools. @example -# Grab and show the input of a video4linux device. +# Grab and show the input of a video4linux device, frame rate is set +# to the default of 25/1. ffplay -s 320x240 -f video4linux /dev/video0 # Grab and show the input of a video4linux2 device, autoadjust size. ffplay -f video4linux2 /dev/video0 -# Grab and record the input of a video4linux2 device, autoadjust size. +# Grab and record the input of a video4linux2 device, autoadjust size, +# frame rate value defaults to 0/0 so it is read from the video4linux2 +# driver. ffmpeg -f video4linux2 -i /dev/video0 out.mpeg @end example |