오픈소스 웹 스트리밍 감시카메라
sudo apt-get install libjpeg8-dev imagemagick libv4l-dev subversion
svn checkout svn://svn.code.sf.net/p/mjpg-streamer/code mjpg-streamer
cd mjpg-streamer/mjpg-streamer
make -j2
./start.sh
웹페이지를 통해 접속 ip:8080
| git 서버설치 (0) | 2018.07.20 |
|---|---|
| 정적라이브러리, 동적라이브러리 (0) | 2018.07.19 |
| [Linux]Samba 설정 (0) | 2017.10.06 |
| [libudev] 함수정리 (0) | 2017.04.18 |
| Gstreamer 파이프라인 디버깅 (0) | 2017.04.14 |
ALSA 란?
rpi3 사운드카드 커널모듈 확인하기
$ cat /proc/asound/modules
0 snd_bcm2835
$ snd_bcm2835 모듈정보 확인하기
modinfo snd_bcm2835
filename: /lib/modules/4.14.37-v7+/kernel/drivers/staging/vc04_services/bcm2835-audio/snd-bcm2835.ko
license: GPL
description: Alsa driver for BCM2835 chip
author: Dom Cobley
srcversion: E5D598E47E3BA0AA5049F39
alias: of:N*T*Cbrcm,bcm2835-audioC*
alias: of:N*T*Cbrcm,bcm2835-audio
depends: snd-pcm,snd
staging: Y
intree: Y
name: snd_bcm2835
vermagic: 4.14.37-v7+ SMP mod_unload modversions ARMv7 p2v8
parm: force_bulk:Force use of vchiq bulk for audio (bool)
parm: enable_hdmi:Enables HDMI virtual audio device (bool)
parm: enable_headphones:Enables Headphones virtual audio device (bool)
parm: enable_compat_alsa:Enables ALSA compatibility virtual audio device (bool)
rpi3
Advanced Linux Sound Architecture
$ cat /proc/asound/cards
0 [ALSA ]: bcm2835_alsa - bcm2835 ALSA
bcm2835 ALSA
가상 파일시스템의 사운드 장치 확인하기
ls -l /proc/asound/card*
-r--r--r-- 1 root root 0 7월 5 10:51 id dr-xr-xr-x 9 root root 0 7월 5 10:51 pcm0p dr-xr-xr-x 3 root root 0 7월 5 10:51 pcm1p |
pcm 폴더는 playback device 를 나타낸다.
$ cat /proc/asound/card0/pcm0p/info
card: 0
device: 0
subdevice: 0
stream: PLAYBACK
id: bcm2835 ALSA
name: bcm2835 ALSA
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 7
subdevices_avail: 7
$ cat /proc/asound/card0/pcm1p/info
card: 0
device: 1
subdevice: 0
stream: PLAYBACK
id: bcm2835 ALSA
name: bcm2835 IEC958/HDMI
subname: subdevice #0
class: 0
subclass: 0
subdevices_count: 1
subdevices_avail: 1
HDMI 출력 테스트
$ speaker-test -Dhw:0,1 -c2 -twav
$ speaker-test -Dhw:ALSA,0 -c2 -twav
speaker-test -Dhw:ALSA,0 -c2 -twav
speaker-test 1.1.3 Playback device is hw:ALSA,0 Stream parameters are 48000Hz, S16_LE, 2 channels WAV file(s) Rate set to 48000Hz (requested 48000Hz) Buffer size range from 256 to 32768 Period size range from 256 to 32768 Using max buffer size 32768 Periods = 4 was set period_size = 8192 was set buffer_size = 32768 0 - Front Left 1 - Front Right |
ALSA Operation
furmuwon : http://pds21.egloos.com/pds/201612/23/62/alsa(embedded_linux).pdf
Raspberry-Pi-Model-Bplus-Product-Brief.pdf:
https://static.raspberrypi.org/files/product-briefs/Raspberry-Pi-Model-Bplus-Product-Brief.pdf
사양 : 64bit quad core processor running at 1.4GHz ,
dual-and 2.4GHz and 5GHz wireless LAN,
Specifications
Processor : Broadcom BCM2837B0, Cortex-A53
Memory : 1GB LPDDR2 SDRAM
Connectivity :
* 2.4GHz and 5GHz IEEE 802.11.b/g/n/ac wireless
* Gigabit Ethernet over USB 2.0 (maximum throughput 300Mbps)
* 4 x USB 2.0 ports
Access : Extended 40-pin GPIO header
Video & sound
* 1 x full size HDMI
* MIPI DSI display port
* MIPI CSI camera port
* 4 pole stereo output and composite video port
SD card support
Input power
* 5V/2.5A DC , micro USB connector
Environment : Operating temperature , 0- 50 °C
alsa 관련 라이브러리
alsa-lib/ alsa-plugins/ alsa-state/ alsa-utils/
alsa-utils
- aconnect alsaloop alsamixer alsaucm amidi amixer aplay aplaymidi arecord arecordmidi aseqdump aseqnet iecset speaker-test
alsa-plugins
optional : FFmpeg, libsamplerate, PulseAudio, Speex , JACK, maemo
http://www.linuxfromscratch.org/blfs/view/svn/multimedia/alsa-plugins.html
pulseAudio Gstreamer 설정 - http://crazyraven.tistory.com/?page=7