embedded system,arduino,raspberry pi,msp430f169, ARM7

Tuesday, April 22, 2014

On 11:36 AM by array operation   No comments

OMXPlayer

OMXPlayer is a commandline OMX player for the Raspberry Pi. It was developed as a testbed for the XBMC Raspberry PI implementation and is quite handy to use standalone.

Downloading OMXPlayer

git clone git://github.com/huceke/omxplayer.git

Compiling OMXPlayer

GCC version 4.7 is required.

Cross Compiling

You need the content of your sdcard somewhere mounted or copied. There might be development headers to install on the running Pi system for the crosscompiling.
Edit Makefile.include and change the settings according your locations.
make ffmpeg
make
make dist

Installing OMXPlayer

Copy over omxplayer-dist/* to the Pi /. You may want to specify a valid font path inside the omxplayer shell script.

Compiling on the Pi

You can also compile it on the PI the native way ;) Run this script (which will install packages and update firmware) ./prepare-native-raspbian.sh and build with make ffmpeg make

Using OMXPlayer

Usage: omxplayer [OPTIONS] [FILE]
Options :
         -h / --help                    print this help
         -n / --aidx  index             audio stream index    : e.g. 1
         -o / --adev  device            audio out device      : e.g. hdmi/local
         -i / --info                    dump stream format and exit
         -s / --stats                   pts and buffer stats
         -p / --passthrough             audio passthrough
         -d / --deinterlace             deinterlacing
         -w / --hw                      hw audio decoding
         -3 / --3d mode                 switch tv into 3d mode (e.g. SBS/TB)
         -y / --hdmiclocksync           adjust display refresh rate to match video (default)
         -z / --nohdmiclocksync         do not adjust display refresh rate to match video
         -t / --sid index               show subtitle with index
         -r / --refresh                 adjust framerate/resolution to video
         -g / --genlog                  generate log file
         -l / --pos n                   start position (in seconds)
              --boost-on-downmix        boost volume when downmixing
              --vol n                   Set initial volume in millibels (default 0)
              --subtitles path          external subtitles in UTF-8 srt format
              --font path               subtitle font
                                        (default: /usr/share/fonts/truetype/freefont/FreeSans.ttf)
              --font-size size          font size as thousandths of screen height
                                        (default: 55)
              --align left/center       subtitle alignment (default: left)
              --lines n                 number of lines to accommodate in the subtitle buffer
                                        (default: 3)
              --win "x1 y1 x2 y2"       Set position of video window
              --audio_fifo  n           Size of audio output fifo in seconds
              --video_fifo  n           Size of video output fifo in MB
              --audio_queue n           Size of audio input queue in MB
              --video_queue n           Size of video input queue in MB
For example:
./omxplayer -p -o hdmi test.mkv

Key Bindings

While playing you can use the following keys to control omxplayer:
z           Show Info
1           Decrease Speed
2           Increase Speed
j           Previous Audio stream
k           Next Audio stream
i           Previous Chapter
o           Next Chapter
n           Previous Subtitle stream
m           Next Subtitle stream
s           Toggle subtitles
d           Subtitle delay -250 ms
f           Subtitle delay +250 ms
q           Exit OMXPlayer
Space or p  Pause/Resume
-           Decrease Volume
+           Increase Volume
Left Arrow  Seek -30 s
Right Arrow Seek +30 s
Down Arrow  Seek -600 s
Up Arrow    Seek +600 s
On 11:27 AM by array operation   No comments
this is the simple program take the inputs from the user and process the output using the if elif and else

 x = int(raw_input("Please enter an integer: "))
Please enter an integer: 42
>>> if x < 0:
     x = 0
     print 'Negative changed to zero'
elif x == 0:
print 'Zero'
elif x == 1:
     print 'Single'
else:
print 'More'
More


//to write in file
//for raspberry pi
sudo nano filename.py
//for beagle bone black
nano filename.py


//for compiling the code
//on raspberry pi
sudo python filename.py
//on beagle
python filename.py



On 11:22 AM by array operation   No comments
//displaying the date command

import os
os.system("date")


//taking the input from the your and processing that using the python

import os
os.system("date")
user_input = input('Give me a number: ')
if user_input==1 :
os.system("omxplayer -o hdmi /home/pi/videos/Kommalallo.mp4")
elif user_input==2 :
os.system("omxplayer -o hdmi /home/pi/videos/Poovai.flv")
elif user_input==3 :
os.system("omxplayer -o hdmi /home/pi/videos/RamChahe.mp4")
elif user_input==4 :
os.system("omxplayer -o hdmi /home/pi/videos/Sasirekha.mp4")
elif user_input==5 :
os.system("omxplayer -o hdmi /home/pi/videos/Kommalallo.mp4")
else:
os.system("ctrl+c")