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Playing Recorded Files(!0%2+'6LG'6(77!03"%H20H131
Using ALSA for audio capture and playback$2101%'<34990$2
Using the Video Output Device$2%%606E2101%00E%32JK!2Hcat outp
Using the Video Overlay$21302!3%1210%06$2216%/9"%090
9601!"%%!%62L2%3'.'(,9$!<!0G$29
• :)General Notes1%%%1/dev/videoX2?%2!"%%3212%033$2
VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMTint ioctl(int fd, int request, struct v4l2_format *fmt);fmt->pix.width*33"4
VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMPint ioctl(int fd, int request, v4l2_jpegcompression *jc);jc->quality*33#5#$2%4
V4L2_CID_VFLIPH"1O0<#06S2253_CID_DFLIP:3O0<#06+1&qu
#H%"LGH"<2.H"<2//S2253_CID_OSD_TRANSPARENT:*3<!%2
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*2/.%!<!6'(,9$06@2"<%%"1V4L2_CID
22%!%%VIDIOC_ENUMAUDOUT, VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUTint ioctl(int fd, int request, struct v4l2_audioout *audio);$2%
int osdOn, & ZV#int osdChan, & 2LE"61Gint osdBmp, & "!0ZV#int transparent,
unsigned char data[0]; // data must contain headers that // describe image dimensions};#define OVERLAY_UPDATE_DISPLAY 1 #define OVERLAY_UPDATE_
2V4#3"V#$%%316!323!H."6%H[[."6%H3"!3"
221#4####<2%"R#SV#4#<RSV###<RSV#CL!8G<RSV##<
6!*2%#CCCC<21%66%2"%26)B%'%6%!S2253P_VIDIOC_S_GPS
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S2253P_VIDIOC_S_GPS_ENABLEint ioctl(int fd, int request, struct s2253p_gps *data);%%0;30%\\;;%%U;;"U#V%&q
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S2253P_VIDIOC_S_XIO_READint ioctl(int fd, int request, void *data);2!!21!%<""6&
S2253P_VIDIOC_G_GPS_LATITUDEint ioctl(int fd, int request, struct s2253p_gps_item *data);%%0;30%;!\2%R/SUE"61
)2,'!$,'!%"")B%'%6%!S2253P_VIDIOC_G_GPS_UTC_DATEint ioctl(int fd, int reque
S2253P_VIDIOC_G_GPS_GGAint ioctl(int fd, int request, struct s2253p_gps_msg *data);%%0;30%;!%3\2%R#SU]U)2!%,,!%%
__u32 counts[2]; // not used};("%62%32%%@2%62%!%"<21
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Troubleshooting*21%<321<211%<2%!68
Demo Program8%1%% 8!2!!Jmake demoK J./captureK%2!00 $60J
GUI Demo Program8%1%%(200J!06K216$200
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