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#X obj 3 1406 doc_o 1;
#X obj 3 1503 doc_also;
#X obj 14 379 doc_ii 0;
#X obj 97 401 doc_m i0 brightness;
#X obj 97 887 doc_m i0 hue;
#X obj 97 672 doc_m i0 colour;
#X obj 97 729 doc_m i0 contrast;
#X obj 97 1339 doc_m i0 whiteness;
#X obj 97 786 doc_m i0 get;
#X obj 97 423 doc_m i0 channel;
#X obj 97 1172 doc_m i0 tuner;
#X obj 97 944 doc_m i0 norm;
#X obj 97 751 doc_m i0 frequency;
#X obj 97 1054 doc_m i0 transfer symbol;
#X obj 97 1273 doc_m i0 white_red;
#X obj 97 1207 doc_m i0 white_blue;
#X obj 97 1317 doc_m i0 white_speed;
#X obj 97 1251 doc_m i0 white_delay;
#X obj 97 379 doc_m i0 auto_gain;
#X obj 97 909 doc_m i0 noise_reduction;
#X obj 97 694 doc_m i0 compression;
#X obj 97 484 doc_m i0 colorspace;
#X obj 97 1032 doc_m i0 size;
#X text 232 1032 \$1=y \$2=x;
#X text 232 821 "min": minimum values for "size";
#X text 232 843 "max": maximum values for "size";
#X text 232 865 default: gets all attributes.;
#X text 232 786 gets a specific attribute. a message is sent through
right outlet.;
#X text 232 1124 In case of mmap \, the extra numeric argument sets
the queue length in number of frames \, so you can select an appropriate
tradeoff between efficiency and latency.;
#X obj 0 1523 doc_f;
#X obj 14 1436 doc_oo 0;
#X obj 97 1436 doc_m o0 grid;
#X obj 97 1458 doc_m o0 <any>;
#X text 232 1436 image coming out;
#X text 232 1458 most any inlet 0 message is also an outlet 0 message
whose output can be triggered using 'get'.;
#X text 353 27 get images from a V4L1 camera interface.;
#X text 353 42 this is for Linux only.;
#X obj 41 153 print;
#X obj 3 198 doc_c ...;
#X msg 29 237 open videodev /dev/video0;
#X text 224 232 you can send this to an [#in] \, but you could use
[#camera] instead.;
#X msg 32 94 open videodev /dev/video0 \, get;
#X text 223 93 for any V4L1 camera;
#X msg 38 114 open videodev /dev/video0 \, pwc \, get;
#X text 257 113 for PWC V4L1 cameras only;
#X text 258 127 (this can cause problems with some non-PWC drivers)
;
#X obj 26 134 #in;
#X obj 26 74 metro 100;
#X obj 26 57 tgl 15 0 empty empty empty 17 7 0 10 -262144 -1 -1 0 1
;
#X text 232 379 0..65535: some other kind of contrast setting (PWC
only);
#X text 232 423 connector selector : for example \, BTTV cards might
have channel 1 as the RCA Composite input \, but have channels numbered
0 \, 2 and 3 \, with different kinds of plugs. do not confuse this
name with the channels in a colorspace.;
#X text 232 484 "y": 1 channel: grey;
#X text 232 528 "rgb": 3 channels: red \, green \, blue.;
#X text 232 550 "magic": 3 channels like "yuv" \, with two exceptions
: pixel values go from 16 to 239 (as given by video cards) instead
of 0 to 255 \, and also \, picture size is half-width \, half-height
\, as Y is shrunk to fit UV \, instead of UV being stretched to fit
Y. this is designed to be used with the YUV420P (palette 15) mode only.
;
#X text 232 672 0..65535: also called "saturation";
#X text 232 729 0..65535: the main contrast setting;
#X text 232 751 0..65535: for picking up a station on a TV channel.
you need to find country-specific tunings for this.;
#X text 232 887 0..65535: the main hueshift setting;
#X text 232 694 0..3: a PWC-only setting \, but I don't have a PWC
camera that actually supports this.;
#X text 232 909 0..3: a PWC-only setting \, but I don't have a PWC
camera that actually supports this.;
#X text 232 944 0: PAL;
#X text 232 966 1: NTSC;
#X text 232 988 2: SECAM;
#X text 232 1010 3: auto;
#X text 232 1054 "read": Some cameras/drivers only support this instead
of mmap.;
#X text 232 1089 "mmap": \$1=nframes (default:2) is the normal (and
fast) way of transferring pictures from the camera.;
#X text 232 1172 to pick UHF \, VHF \, ... or something like that.
usually unused.;
#X text 232 1229 0..65535: offset for the V channel (blue-yellow balance)
;
#X text 232 1295 0..65535: offset for the U channel (red-cyan balance)
;
#X text 232 1361 0..65535: another setting similar to brightness and
contrast.;
#X text 232 401 0..65535: the main brightness setting;
#X text 232 506 "yuv": 3 channels: grey \, blue/yellow \, red/cyan.
;
#X text 232 637 "rgba": 4 channels: red \, green \, blue \, alpha \,
in which alpha is always set to 255;
#X obj 103 1503 #camera;
#X obj 157 1503 doc_link #io.dc1394;
#X obj 247 1503 doc_link #io.quicktimecamera;
#X msg 29 267 open videodev /dev/video0 1;
#X text 225 265 this one uses libv4l1 (the v4l1 library) \, instead
of using classic v4l1 (the kernel interface). this allows virtualisation
such as using a v4l2-only driver in a v4l1-only programme \, and such
as auto-converting pixel formats between the driver and the programme.
;
#X text 232 1207 PWC-specific;
#X text 232 1251 PWC-specific. i don't really know this option.;
#X text 232 1317 PWC-specific. i don't really know this option.;
#X text 232 1273 PWC-specific.;
#X text 232 1339 PWC-specific.;
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#X connect 16 1 70 0;
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