Changes

==Introduction==

This page lists some statistics and information about real use cases based on [[Naon Embedded Linux Kit (NELK)]].

For the sake of completeness, for each use case the full command line used to run the test application is provided. System software is based on [[Naon Embedded Linux Kit (NELK)]] 2.0.0 Alpha.

Output is HDMI port connected to Full HD 46" TV screen.

CPU usage refers to the process under test as reported by <code>top</code> application.

* Description: playing H264 RAW video 1920x1080@25fps

* CPU usage: 30%

decode_display_a8host_debug.xv5T -w 1920 -h 1080 -f 25 -i /home/root/working-dir/battleship-ressurrecting_h1080p.h264

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* Description: playing H264 MP4 video 1920x1080@30fps demuxed video only

* CPU usage: 12%

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* Description: playing two videos (both are hrdware decoded)

** video #1: H264 Raw 1920x1080 @25fps

gst-launch omx_videomixer port-index=0 framerate=25 name=mix sink_00::outX=0 sink_00::outY=0 sink_00::outWidth=1920 sink_00::outHeight=816 sink_01::outX=0 sink_01::outY=0 sink_01::outWidth=848 sink_01::outHeight=360 ! omx_ctrl display-mode=OMX_DC_MODE_1080P_60 ! omx_videosink sync=false filesrc location=/home/root/working-dir/480p-ice-int.h264 ! 'video/x-h264' ! h264parse access-unit=true ! omx_h264dec ! mix. filesrc location=/home/root/working-dir/iceage4-1080p.h264 ! 'video/x-h264' ! h264parse access-unit=true ! omx_h264dec ! mix.

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This section shows some different video combinations with overlayed text.

* Description: playing two videos (both are hardware decoded)

** video #1: H264 Raw 1920x1080 @25fps with ClockOverlay

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* Description: playing two videos (both are hardware decoded) with no overlap

** video #1: H264 Raw 1920x1080 @25fps rescaled in hardware to 1280x720

[[File:PiPseparated.jpg|400px]]

* Description: playing two videos (both are hardware decoded)

** video #1: H264 MP4 1920x1080 @30fps demuxed only video

[[File:PipFull.jpg|400px]]

* Description: playing two videos (both are hardware decoded)

** video #1: H264 MP4 1920x1080 @30fps demuxed only video

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* Description: Stream H264 320x240 rescaled at 800x600

* CPU usage: 9%

video/x-raw-yuv,width=800,height=600' !omx_ctrl display-mode=OMX_DC_MODE_1080P_60 ! omx_videosink sync=false

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* Description: playing two videos (both are hardware decoded)

** video #1: H264 MP4 1920x1080 @30fps demuxed only video

[[File:PiPstreaming.jpg|400px]]

* Description:

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* Description:

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* Description

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This section provides some examples of applications based on well-known [http://en.wikipedia.org/wiki/Video4Linux|Video4Linux API].

This sample program capture a video stream on v4l2 input and display the frames on v4l2 output. More information regarding the software can be found on [http://processors.wiki.ti.com/index.php/TI81XX_Video_Capture_Driver_User_Guide#saLoopBack this] TI wiki article.

This utility take a snapshot for USB WebCAM using v4l2 driver class uvc

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The two Ethernet interfaces on [[Category:NaonEVB-Lite|NaonEVB-Lite]] can be used as:

NELK root file system derives directly from the one delivered along with TI EZSDK. In order to enrich it by installing new pre-built packages, well-known opkg tool comes to help.