.\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.49.1.
.TH YAVTA "1" "April 2022" "yavta 0.0+git20220328.c7b5b75" "User Commands"
.SH NAME
yavta \- Yet Another V4L2 Test Application
.SH SYNOPSIS
.B yavta
[\fI\,options\/\fR] \fI\,device\/\fR
.SH DESCRIPTION
Supported options:
\fB\-B\fR, \fB\-\-buffer\-type\fR               Buffer type ("capture", "output",
.IP
"capture\-mplane" or "output\-mplane")
.PP
\fB\-c\fR, \fB\-\-capture\fR[=\fI\,nframes\/\fR]         Capture frames
\fB\-C\fR, \fB\-\-check\-overrun\fR             Verify dequeued frames for buffer overrun
\fB\-d\fR, \fB\-\-delay\fR                     Delay (in ms) before requeuing buffers
\fB\-f\fR, \fB\-\-format\fR format             Set the video format
.IP
use \fB\-f\fR help to list the supported formats
.PP
\fB\-F\fR, \fB\-\-file\fR[=\fI\,name\/\fR]               Read/write frames from/to disk
.IP
For video capture devices, the first '#' character in the file name is
expanded to the frame sequence number. The default file name is
\&'frame\-#.bin'.
.PP
\fB\-h\fR, \fB\-\-help\fR                      Show this help screen
\fB\-i\fR, \fB\-\-input\fR input               Select the video input
\fB\-I\fR, \fB\-\-fill\-frames\fR               Fill frames with check pattern before queuing them
\fB\-l\fR, \fB\-\-list\-controls\fR             List available controls
\fB\-n\fR, \fB\-\-nbufs\fR n                   Set the number of video buffers
\fB\-p\fR, \fB\-\-pause\fR[=\fI\,n\/\fR]                 Pause after n frames (0 if n isn't specified)
\fB\-q\fR, \fB\-\-quality\fR n                 MJPEG quality (0\-100)
\fB\-r\fR, \fB\-\-get\-control\fR ctrl          Get control 'ctrl'
\fB\-R\fR, \fB\-\-realtime\fR=\fI\,[priority]\/\fR       Enable realtime RR scheduling
\fB\-s\fR, \fB\-\-size\fR WxH                  Set the frame size
\fB\-t\fR, \fB\-\-time\-per\-frame\fR num/denom  Set the time per frame (eg. 1/25 = 25 fps)
\fB\-u\fR, \fB\-\-userptr\fR                   Use the user pointers streaming method
\fB\-w\fR, \fB\-\-set\-control\fR 'ctrl value'  Set control 'ctrl' to 'value'
.TP
\fB\-\-buffer\-prefix\fR
Write portions of buffer before data_offset
.TP
\fB\-\-buffer\-size\fR
Buffer size in bytes
.TP
\fB\-\-enum\-formats\fR
Enumerate formats
.TP
\fB\-\-enum\-inputs\fR
Enumerate inputs
.TP
\fB\-\-fd\fR
Use a numeric file descriptor insted of a device
.TP
\fB\-\-field\fR field
Set the format field order
.IP
Valid values for field are none, top, bottom, interlaced, seq\-tb, seq\-bt,
alternate, interlaced\-tb and interlaced\-bt.
.TP
\fB\-\-log\-status\fR
Log device status
.TP
\fB\-\-no\-query\fR
Don't query capabilities on open
.TP
\fB\-\-offset\fR
User pointer buffer offset from page start
.TP
\fB\-\-premultiplied\fR
Color components are premultiplied by alpha value
.TP
\fB\-\-queue\-late\fR
Queue buffers after streamon, not before
.TP
\fB\-\-requeue\-last\fR
Requeue the last buffers before streamoff
.TP
\fB\-\-reset\-controls\fR
Reset all available controls to their default value
.TP
\fB\-\-timestamp\-source\fR
Set timestamp source on output buffers [eof, soe]
.TP
\fB\-\-skip\fR n
Skip the first n frames
.TP
\fB\-\-sleep\-forever\fR
Sleep forever after configuring the device
.TP
\fB\-\-stride\fR value
Line stride in bytes