'embeded' 카테고리의 글 목록 (93 Page)

'embeded'에 해당되는 글 1409건

2016.07.10 초음파/온습도 센서 데이터 시트 복사
2016.07.06 avr iar __flash winavr PROGMEM
2016.06.28 rpi gstreamer mux
2016.06.28 beowulf / openMPI
2016.06.23 redmine on raspberrypi 9
2016.06.21 gsteamer rtspsink
2016.06.18 라즈베리 파이 카메라(rpi cam) 렌즈 교체.. 2
2016.06.10 raspivid - H264 SPS PPS?
2016.06.09 raspistill 빠르게 사진 찍기
2016.05.27 라즈베리 파이 gstreamer / vlc ... 실패?

초음파 거리 + 온/습도 센서 (0)	2016.07.10
초음파 센서 wiring pi 버전 (0)	2016.07.10
rpi gstreamer mux (0)	2016.06.28
beowulf / openMPI (0)	2016.06.28
redmine on raspberrypi (9)	2016.06.23

avr iar __flash winavr PROGMEM

...strings into flash

The idea here is to override each string in the code so that it ends up in flash.

__flash char str1[] = "abcdef";

__flash char str2[] = "ghi";

__flash char __flash * pVar[] = { str1, str2 };

[링크 : https://www.iar.com/support/tech-notes/compiler/strings-with-iccavr-2.x/]

#include <avr/pgmspace.h>

.

unsigned char mydata[11][10] PROGMEM =

{

{0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09},

{0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,0x13},

{0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D},

{0x1E,0x1F,0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27},

{0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31},

{0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B},

{0x3C,0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,0x45},

{0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F},

{0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59},

{0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,0x60,0x61,0x62,0x63},

{0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D}

};

[링크 : http://www.nongnu.org/avr-libc/user-manual/pgmspace.html]

'embeded > AVR (ATmega,ATtiny)' 카테고리의 다른 글

avr hex start addres 다시 설정이 가능할까? (0)	2017.02.12
우리로봇기술 사이트 폐쇄 (0)	2016.08.24
부품들 정리 (0)	2016.04.16
avr pwm timer 계산기 (0)	2016.04.14
atmega sram external (0)	2016.04.12

Posted by 구차니

초음파 센서 wiring pi 버전 (0)	2016.07.10
초음파/온습도 센서 데이터 시트 복사 (0)	2016.07.10
beowulf / openMPI (0)	2016.06.28
redmine on raspberrypi (9)	2016.06.23
gsteamer rtspsink (0)	2016.06.21

초음파/온습도 센서 데이터 시트 복사 (0)	2016.07.10
rpi gstreamer mux (0)	2016.06.28
redmine on raspberrypi (9)	2016.06.23
gsteamer rtspsink (0)	2016.06.21
라즈베리 파이 카메라(rpi cam) 렌즈 교체.. (2)	2016.06.18

rpi gstreamer mux (0)	2016.06.28
beowulf / openMPI (0)	2016.06.28
gsteamer rtspsink (0)	2016.06.21
라즈베리 파이 카메라(rpi cam) 렌즈 교체.. (2)	2016.06.18
raspivid - H264 SPS PPS? (0)	2016.06.10

beowulf / openMPI (0)	2016.06.28
redmine on raspberrypi (9)	2016.06.23
라즈베리 파이 카메라(rpi cam) 렌즈 교체.. (2)	2016.06.18
raspivid - H264 SPS PPS? (0)	2016.06.10
raspistill 빠르게 사진 찍기 (0)	2016.06.09

redmine on raspberrypi (9)	2016.06.23
gsteamer rtspsink (0)	2016.06.21
raspivid - H264 SPS PPS? (0)	2016.06.10
raspistill 빠르게 사진 찍기 (0)	2016.06.09
라즈베리 파이 gstreamer / vlc ... 실패? (0)	2016.05.27

gsteamer rtspsink (0)	2016.06.21
라즈베리 파이 카메라(rpi cam) 렌즈 교체.. (2)	2016.06.18
raspistill 빠르게 사진 찍기 (0)	2016.06.09
라즈베리 파이 gstreamer / vlc ... 실패? (0)	2016.05.27
라즈베리 파이 고해상도 스트리밍... (0)	2016.05.27

raspistill 빠르게 사진 찍기

-t, --timeout : Time (in ms) before takes picture and shuts down (if not specified, set to 5s)

기본값이 5초라서

사진 하나 받아오는데 항상 5초 걸리는 기분..

-t 0 는 안되므로

-t 1 이상은 설정을 해야 한다.

pi@raspberrypi:~/Pictures $ time raspistill -o tt.jpg -t 1

real 0m0.778s

user 0m0.010s

sys 0m0.030s

pi@raspberrypi:~/Pictures $ time raspistill -o tt.jpg -t 1000

real 0m1.948s

user 0m0.020s

sys 0m0.040s

받아오는 해상도 별로 시간 차이는 없음.

+

-tl, --timelapse : Timelapse mode. Takes a picture every <t>ms. %d == frame number (Try: -o img_%04d.jpg)

그나저나 타임랩스 기능이 있네?

$ raspistill -tl 33 -o img_%04d.jpg

mmal: Skipping frame 2 to restart at frame 14

mmal: Skipping frame 15 to restart at frame 30

mmal: Skipping frame 31 to restart at frame 48

mmal: Skipping frame 49 to restart at frame 68

mmal: Skipping frame 69 to restart at frame 90

mmal: Skipping frame 91 to restart at frame 112

mmal: Skipping frame 113 to restart at frame 134

mmal: Skipping frame 135 to restart at frame 156

1/30초 단위로 찍게 하려고 33msec 했는데 1초에 두번 겨우 하는 정도..

$ file *

img_0001.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:03:56, width=0], baseline, precision 8, 2592x1944, frames 3

img_0014.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:03:57, width=0], baseline, precision 8, 2592x1944, frames 3

img_0030.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:03:57, width=0], baseline, precision 8, 2592x1944, frames 3

img_0048.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:03:58, width=0], baseline, precision 8, 2592x1944, frames 3

img_0068.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:03:58, width=0], baseline, precision 8, 2592x1944, frames 3

img_0090.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:03:59, width=0], baseline, precision 8, 2592x1944, frames 3

img_0112.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:04:00, width=0], baseline, precision 8, 2592x1944, frames 3

img_0134.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:04:00, width=0], baseline, precision 8, 2592x1944, frames 3

img_0156.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:04:01, width=0], baseline, precision 8, 2592x1944, frames 3

해상도별 차이는 없는 기분?

$ raspistill -tl 1 -o img_%04d.jpg -w 640 -h 480

mmal: Skipping frame 2 to restart at frame 342

mmal: Skipping frame 343 to restart at frame 868

mmal: Skipping frame 869 to restart at frame 1442

mmal: Skipping frame 1443 to restart at frame 2124

mmal: Skipping frame 2125 to restart at frame 2847

mmal: Skipping frame 2848 to restart at frame 3569

mmal: Skipping frame 3570 to restart at frame 4292

mmal: Skipping frame 4293 to restart at frame 5014

$ file *

img_0001.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:01, width=0], baseline, precision 8, 640x480, frames 3

img_0342.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:02, width=0], baseline, precision 8, 640x480, frames 3

img_0868.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:02, width=0], baseline, precision 8, 640x480, frames 3

img_1442.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:03, width=0], baseline, precision 8, 640x480, frames 3

img_2124.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:03, width=0], baseline, precision 8, 640x480, frames 3

img_2847.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:04, width=0], baseline, precision 8, 640x480, frames 3

img_3569.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:05, width=0], baseline, precision 8, 640x480, frames 3

img_4292.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:05, width=0], baseline, precision 8, 640x480, frames 3

img_5014.jpg: JPEG image data, Exif standard: [TIFF image data, big-endian, direntries=10, height=0, manufacturer=RaspberryPi, model=RP_ov5647, xresolution=156, yresolution=164, resolutionunit=2, datetime=2016:06:09 11:07:06, width=0], baseline, precision 8, 640x480, frames 3

'embeded > raspberry pi' 카테고리의 다른 글

라즈베리 파이 카메라(rpi cam) 렌즈 교체.. (2)	2016.06.18
raspivid - H264 SPS PPS? (0)	2016.06.10
라즈베리 파이 gstreamer / vlc ... 실패? (0)	2016.05.27
라즈베리 파이 고해상도 스트리밍... (0)	2016.05.27
으아아아아 앙대 ㅠㅠ 케이블 단선? (4)	2016.05.25

Posted by 구차니

라즈베리 파이 gstreamer / vlc ... 실패?

vlc로는 안되고.. 팟플레이어로는 잘 된다...

아무튼, 초기 로딩은 느린데 딜레이 자체는 0.5초 정도 미만? 꽤 빠르다.

핵심은.. gst-rtsp 패키지를 받아야 하는거고

그걸 통해서 tcp / rtp 스트리밍 한걸 받아서 rtsp로 보내준다.

$ mkdir src

$ cd src

$ wget http://gstreamer.freedesktop.org/src/gst-rtsp/gst-rtsp-0.10.8.tar.bz2

$ tar -xvf gst-rtsp-0.10.8.tar.bz2

$ sudo apt-get install libglib2.0-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev gstreamer-tools gstreamer0.10-plugins-base gstreamer0.10-plugins-good gstreamer0.10-plugins-bad gstreamer0.10-plugins-ugly

$ cd gst-rtsp-0.10.8

$ ./configure

$ make -j4

$ cd examples

$ raspivid -t 0 -n -o - | gst-launch -v fdsrc ! h264parse ! gdppay ! tcpserversink host=127.0.0.1 port=5000 | ./test-launch "( tcpclientsrc host=127.0.0.1 port=5000 ! gdpdepay ! avdec_h264 ! rtph264pay name=pay0 pt=96 )"

[링크 : http://www.aftermath.kr/entry/GStreamer-RTSP-with-RPi]

+ 2016.06.09

[링크 : https://www.raspberrypi.org/forums/viewtopic.php?p=721798]

팟플레이어는 좀 오래걸려서 그렇지 나오는데(딜레이는 적음)

+ 2015.06.10

지금보니.. bitrate가 0으로 뜨네?

VLC는 이렇게 한 프레임만 디코딩 하고 그 이후로는 디코딩을 하지 못한다...

udp로는 하기 힘드네.. 설정을 찾아 봐야...

$ raspivid -t 0 -n -o - | gst-launch -v fdsrc ! h264parse ! gdppay ! udpsink host=127.0.0.1 port=5000 | ./test-launch "( udpsrc port=5000 caps = 'application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96' ! gdpdepay ! avdec_h264 ! rtph264pay name=pay0 pt=96 )"

---

cvlc 를 통한 h.264 rtsp 스트리밍은 딜레이가 상당히 크다.

vlc의 버퍼링을 제외하더라도 1초 정도 이상?

gstreamer를 쓰면 딜레는 낮은데

rpi 2b -> b+ 는 b+의 사양으로 끊어지고

rpi b+ -> 2b는 문제없이 재생이 되었던 걸로 기억을 한다.

2015/09/20 - [embeded/raspberry pi] - 라즈베리 파이 gstreamer 시도

아무튼

cvlc / h.264 / rtsp -> vlc

gstreamer h.264 rtp -> gstreamer

은 시도해봤으나..

gstreamer h.264 rtp -> vlc

cvlc / h.264 / rtsp -> gstreamer

는 아직 미시도..

cvlc로 rtsp 스트리밍 할때 뜨는 sdp 설정

[73c008c8] stream_out_rtp stream out debug: sdp=

v=0

o=- 15776737622825922871 15776737622825922871 IN IP4 raspberrypi

s=Unnamed

i=N/A

c=IN IP4 0.0.0.0

t=0 0

a=tool:vlc 2.2.1

a=recvonly

a=type:broadcast

a=charset:UTF-8

m=video 0 RTP/AVP 96

b=RR:0

a=rtpmap:96 H264/90000

a=fmtp:96 packetization-mode=1

vlc 에서 보려면 sdp 파일로 만들어서 하라는데...

얘는 mpeg4video - es 인거 같고...

v=0

m=video 5000 RTP/AVP 96

c=IN IP4 127.0.0.1

a=rtpmap:96 MP4V-ES/90000

[링크 : http://stackoverflow.com/questions/13154983/gstreamer-rtp-stream-to-vlc]

찾아보고.. cvlc sdp 내용 참조하니.. 별로 고칠건 없을 듯?

c=IN IP4 10.5.110.117

m=video 5004 RTP/AVP 96

a=rtpmap:96 H264/90000

vlc test.sdp

[링크 : http://stackoverflow.com/questions/20538698/minimum-sdp-for-making-a-h264-rtp-stream]

아래는.. 산딸기 마을에서 본거 같은데

아무튼.. rtsp://ip:8554/test 로 하면 된다고 한다.

$ raspivid -t 0 -h 720 -w 1280 -fps 25 -b 2000000 -vf -hf -n -o - | gst-launch -v fdsrc ! h264parse ! gdppay ! tcpserversink host=127.0.0.1 port=5000 | ./test-launch "( tcpclientsrc host=127.0.0.1 port=5000 ! gdpdepay ! avdec_h264 ! rtph264pay name=pay0 pt=96 )"

[링크 : http://www.aftermath.kr/entry/GStreamer-RTSP-with-RPi]

[링크 : http://www.rasplay.org/?p=5607]

$ raspivid -t 0 -w 1280 -h 720 -fps 30 -hf -b 2000000 -n -o - | gst-launch-1.0 -v fdsrc ! h264parse ! rtph264pay config-interval=1 pt=96 ! gdppay ! tcpserversink host=192.168.10.34 port=5000 ! rtspsrc location=rtsp://127.0.0.1:8554/test

mmal: mmal_vc_component_enable: failed to enable component: ENOSPC

mmal: camera component couldn't be enabled

mmal: main: Failed to create camera component

mmal: Failed to run camera app. Please check for firmware updates

WARNING: erroneous pipeline: could not link tcpserversink0 to rtspsrc0

$ raspivid -t 0 -w 1280 -h 720 -fps 30 -hf -b 2000000 -n -o - | gst-launch-1.0 -v fdsrc ! h264parse ! rtph264pay config-interval=1 pt=96 ! gdppay ! rtspsrc location=rtsp://127.0.0.1:8554/test mmal: mmal_vc_component_enable: failed to enable component: ENOSPC

mmal: camera component couldn't be enabled

mmal: main: Failed to create camera component

mmal: Failed to run camera app. Please check for firmware updates

WARNING: erroneous pipeline: could not link gdppay0 to rtspsrc0

끄응.. 안되네 ㅠㅠ

[링크 : http://stackoverflow.com/questions/19308741/gstreamer-cannot-launch-rtsp-streaming]

[링크 : http://stackoverflow.com/questions/13154983/gstreamer-rtp-stream-to-vlc]

[링크 : https://gstreamer.freedesktop.org/documentation/rtp.html]

2016.06.28

Unfortunately, there are two problems I could not solve so far.

1. The SPS / PPS issue

The omxh264enc plugin sends not regularly the needed SPS / PPS information with it. You can work around the problem by immediately accessing the stream after the start of gst-launch, otherwise VLC (for example) cannot play it.

I have found this wrapper for the camera:

https://github.com/AndyA/psips

[링크 : https://www.raspberrypi.org/forums/viewtopic.php?f=70&t=59412]

'embeded > raspberry pi' 카테고리의 다른 글

raspivid - H264 SPS PPS? (0)	2016.06.10
raspistill 빠르게 사진 찍기 (0)	2016.06.09
라즈베리 파이 고해상도 스트리밍... (0)	2016.05.27
으아아아아 앙대 ㅠㅠ 케이블 단선? (4)	2016.05.25
라즈베리 mpeg2 / vc-1 라이센스 (0)	2016.05.23

Posted by 구차니

구차니의 잡동사니 모음

'embeded'에 해당되는 글 1409건

초음파/온습도 센서 데이터 시트 복사

'embeded > raspberry pi' 카테고리의 다른 글

avr iar __flash winavr PROGMEM

'embeded > AVR (ATmega,ATtiny)' 카테고리의 다른 글

rpi gstreamer mux

'embeded > raspberry pi' 카테고리의 다른 글

beowulf / openMPI

'embeded > raspberry pi' 카테고리의 다른 글

redmine on raspberrypi

'embeded > raspberry pi' 카테고리의 다른 글

gsteamer rtspsink

'embeded > raspberry pi' 카테고리의 다른 글

라즈베리 파이 카메라(rpi cam) 렌즈 교체..

'embeded > raspberry pi' 카테고리의 다른 글

raspivid - H264 SPS PPS?

'embeded > raspberry pi' 카테고리의 다른 글

raspistill 빠르게 사진 찍기

'embeded > raspberry pi' 카테고리의 다른 글

라즈베리 파이 gstreamer / vlc ... 실패?

'embeded > raspberry pi' 카테고리의 다른 글

카테고리

공지사항

태그목록

최근에 올라온 글

최근에 달린 댓글

티스토리툴바