구차니의 잡동사니 모음

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.

[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

vlc 에서 보려면 sdp 파일로 만들어서 하라는데...

얘는 mpeg4video - es 인거 같고...

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

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

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.

[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

[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]

raspivid의 제한(?) 인지 1920*1080이 최대라

-md 설정을 이용한 최대 해상도인 2592*1944(5M)는 스트리밍이 불가능...

그래도 확실히 1920보다는 해상도가 오르니 나은건가?

요건 안되고

$ raspivid -o - -t 0 -n -md 2 -w 2592 -h 1944 | cvlc -vvv stream:///dev/stdin --sout '#rtp{sdp=rtsp://:8554/}' :demux=h264

얘는 되고..

$ raspivid -o - -t 0 -n -md 2 | cvlc -vvv stream:///dev/stdin --sout '#rtp{sdp=rtsp://:8554/}' :demux=h264

[링크 : https://www.raspberrypi.org/documentation/raspbian/applications/camera.md]

캡쳐 해보니.. 화각이랑 해상도가 달라지긴 하네..

2M (1920x1080)

5M(2592x1944)

음... 왜 안되지 ... ㅠㅠ

[링크 : https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=59559]

5M로 설정하면 주기적으로 에러가 발생하는데..

[73d00508] core input error: ES_OUT_SET_(GROUP_)PCR  is called too late (pts_delay increased to 320 ms)

[73d00508] core input error: ES_OUT_RESET_PCR called

[73d00508] core input debug: Buffering 0%

[73d00508] core input debug: Buffering 12%

[73d00508] core input debug: Buffering 24%

[73d00508] core input debug: Buffering 37%

[73d00508] core input debug: Buffering 49%

[73d00508] core input debug: Buffering 62%

[73d00508] core input debug: Buffering 74%

[73d00508] core input debug: Buffering 87%

[73d00508] core input debug: Buffering 99%

[73d00508] core input debug: Stream buffering done (360 ms in 624 ms)

[73d00508] core input debug: Decoder wait done in 0 ms

+

2016.05.31

음.. 비디오 코어 자체가 fullHD 인코딩이라.. 그 이상의 해상도는 무리인건가?

rpicam v2 에서도 그럼 8M 로 받아와도 2M로 밖에 전송이 불가능할지도?

[링크 : https://en.wikipedia.org/wiki/VideoCore]

오랫만에 가지고 놀아 보려고 했더니..

망했어 ㅠㅠ

FFC 저거 구하기 빡센데 ㅠㅠ

일단.. sudo apt-get update; sudo apt-get upgrade로 시스템 업그레이드의 여파인가...

config.txt에서는 gpu_mem=128 였는데...

불 들어 옴

$ raspivid -t 0

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

불 안들어 옴

$ raspivid -t 0

mmal: mmal_vc_component_create: failed to create component 'vc.ril.camera' (1:ENOMEM)

mmal: mmal_component_create_core: could not create component 'vc.ril.camera' (1)

mmal: Failed to create camera component

mmal: main: Failed to create camera component

mmal: Camera is not detected. Please check carefully the camera module is installed correctly

선 뽑고..

$ raspivid -t 0

mmal: mmal_vc_component_create: failed to create component 'vc.ril.camera' (1:ENOMEM)

mmal: mmal_component_create_core: could not create component 'vc.ril.camera' (1)

mmal: Failed to create camera component

mmal: main: Failed to create camera component

mmal: Camera is not detected. Please check carefully the camera module is installed correctly

Last login: Wed May 25 19:49:45 2016

pi@raspberrypi:~ $ sudo rpi-update

 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom

 *** Performing self-update

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100 10670  100 10670    0     0  24776      0 --:--:-- --:--:-- --:--:-- 24756

 *** Relaunching after update

 *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom

 *** We're running for the first time

 *** Backing up files (this will take a few minutes)

 *** Backing up firmware

 *** Backing up modules 4.1.19-v7+

#############################################################

This update bumps to rpi-4.4.y linux tree

Be aware there could be compatibility issues with some drivers

Discussion here:

https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=144087

##############################################################

 *** Downloading specific firmware revision (this will take a few minutes)

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100   168    0   168    0     0    188      0 --:--:-- --:--:-- --:--:--   188

100 50.5M  100 50.5M    0     0  1059k      0  0:00:48  0:00:48 --:--:-- 1381k

 *** Updating firmware

 *** Updating kernel modules

 *** depmod 4.4.11-v7+

 *** depmod 4.4.11+

 *** Updating VideoCore libraries

 *** Using HardFP libraries

 *** Updating SDK

 *** Running ldconfig

 *** Storing current firmware revision

 *** Deleting downloaded files

 *** Syncing changes to disk

 *** If no errors appeared, your firmware was successfully updated to 2b9c0bfacfc11ee8bb9b30dc9cdb36289698f8a8

 *** A reboot is needed to activate the new firmware

[링크 : http://raspberrypi..../what-causes-enospc-error-when-using-the-raspberry-pi-camera-module]

/boot/cmdline.txt:

dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait bcm2708.w1_gpio_pin=18

[링크 : https://www.raspberrypi.org/...?f=28&t=61922&p=477860&hilit=enospc#p478550]

그냥... 현재 기준 신펌웨어로 바꾸니 문제 없다.

rpi-update로도 펌웨어 변경은 적용 안되는 듯?

음? mpeg2 decoder?

[링크 : http://www.raspberrypi.com/license-keys/]

    This key will enable a single Raspberry Pi to decode MPEG-2 video in hardware.

    [링크 : http://www.raspberrypi.com/mpeg-2-license-key/]

    This key will enable a single Raspberry Pi to decode VC-1 video in hardware.

    [링크 : http://www.raspberrypi.com/vc-1-license-key/]

[링크 : https://www.raspberrypi.org/blog/new-video-features/]

[링크 : http://elinux.org/RPiconfig#Licensed_Codecs]

[링크 : http://raspberrypi.stackexchange.com/.../why-does-the-raspberry-pi-need-a-mpeg-2-licence]

DVD 재생시 영상을 디코딩 못하므로 MPEG-2 라이센스 필요?

[링크 : http://echo.tistory.com/93]

[링크 : http://echo.tistory.com/92]

vcgencmd codec_enabled MPG2

vcgencmd codec_enabled WVC1

[링크 : http://www.howtogeek.com/.../how-to-add-mpeg-2-and-vc-1-video-codec-...-raspberry-pi/]

mpeg 라이센스 활성화 시 ff-mpeg2video에서 omx-mpeg2로 변화된다고 한다.

[링크 : https://www.youtube.com/watch?v=3zToVK6U7AM]

한줄요약하면..

마스터가 둘이거나, 선이 뒤바뀌었거나?

Generally this happens because something is pulling SDA (pin 3) low.

The i2cdetect program checks for the existence of a device by sending its address then letting SDA float high. If the device exists it should pull SDA low to signal its presence.

Check your wiring to make sure SDA hasn't been inadvertently connected to ground.

[링크 : http://raspberrypi.stackexchange.com/questions/32719/i2cdetect-shows-every-possible-address]

1. Two masters on the same I2C bus.

2. SDA & SCL swapped.

[링크 : https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=93222]

+ 젠장.. 멀티 마스터였던건가!

안된다는 말이 있어서 따라가보니...

핀 자체가 실장이 안되어 있다고... (GPIO19)

bcm2835 has support for I2C slave. Refer to section 11 of http://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf

Unfortunately, GPIO pin 19 (BSC slave CLK) was dropped. http://elinux.org/RPi_BCM2835_GPIOs

So, the built-in I2C slave cannot be used.

[링크 : http://raspberrypi.stackexchange.com/questions/5584/i2c-raspberri-pi-as-a-slave]

[링크 : http://elinux.org/RPi_BCM2835_GPIOs]

음.. FREX 핀은있으나.. 웬지 라즈베리용 카메라에는 FREX를 빼놓지 않았을 기분?

43p

[링크 : http://www.seeedstudio.com/wiki/images/3/3c/Ov5647_full.pdf]

[링크 : http://www.ovt.com/uploads/parts/OV5647.pdf]

어? 120p가 안돼?

Frame rate up to 120 fps

max 90fps. Limitations on frame size for the higher frame rates (VGA only for above 47fps)

그리고.. external / internal sync. 미지원

Support for internal and external frame synchronisation for frame exposure mode

No

[링크 : https://www.raspberrypi.org/documentation/hardware/camera.md]

한마디로 4채널까진 해상도 좀 낮춰서 1Gbps 보다 낮게 설정하면(동시 4채널까진 가능하단건가?)

[링크 : https://github.com/ivmech/ivport/wiki/Capture-Sequence]

[링크 : https://github.com/ivmech/ivport]

[링크 : http://www.arducam.com/multi-camera-adapter-module-raspberry-pi/]

[링크 : http://www.ivmech.com/.../ivport-raspberry-pi-camera-module-multiplexer-p-90]

[링크 :http://www.ivmech.com/.../ivport-dual-raspberry-pi-camera-module-multiplexer-p-104 ]

+

OV5647 can be synched with another sensor using the FREX pin input/output (works also in rolling shutter mode). Needs support in driver though. Guess the FREX pin is not even used in Raspberry Pi Camera design, at least Omnivision reference desing tells not to populate the zero ohm resistor which connect this pin to connector.

[링크 : https://www.raspberrypi.org/forums/viewtopic.php?p=483936]

The Raspberry Pi has a Mobile Industry Processor Interface (MIPI) Camera Serial Interface Type 2 (CSI-2)

MIPI CSI-2 version 1.01 supports up to four data lanes, where each lane has a maximum of 1 Gbps bandwidth, to provide a total bandwidth of 4 Gbps.

[링크 : http://www.petervis.com/Raspberry_PI/Raspberry_Pi_CSI/Raspberry_Pi_CSI_Camera_Interface.html]

음? 카메라 모듈이 기본 2개니까.. 2채널은 동시?

MIPI interface (two lanes) Yes

[링크 : https://www.raspberrypi.org/documentation/hardware/camera.md]

compute module에는 카메라가 두개 꽂히나 보네?

[링크 : https://www.raspberrypi.org/blog/real-time-depth-perception-with-the-compute-module/]

[링크 : http://www.argondesign.com/case-studies/2014/oct/21/stereo-depth-perception-raspberry-pi/]

[링크 : https://www.raspberrypi.org/.../computemodule/RPI-CMIO-V1_2-SCHEMATIC.pdf]

[링크 : https://www.raspberrypi.org/.../raspberrypi/schematics/RPI-3B-V1_2-SCHEMATIC-REDUCED.pdf]

onvif 지원되는 녀석들도 있으려나...

예전 글에 적어 둔거 같은데.. UI도 괜찮은 녀석 이름이 머였지?

[링크 : https://github.com/BreeeZe/rpos]

[링크 : https://github.com/SonsOfTone/RaspberrIP-Camera]

    [링크 : http://www.sonsoftone.com/?page_id=287]

[링크 : ]

음.. 그런데 2b에서는 멀티코어인데 코어활성화 갯수 조절은 없으려나?

1. USB 허브 끄기(근데.. 유선랜도 꺼지려나?)

2. USB 안꼽기

3. HDMI 출력 끄기 (20mA~30mA ?)

4. 다운클럭하기 (/boot/config.txt)

[링크 : http://babaawesam.com/2014/01/24/power-saving-tips-for-raspberry-pi/]