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===Gstreamer-based applications===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. '''N.B.''': before launching the gst pipelines, it is required to [http://bash.cyberciti.biz/guide/Source_command source] the /home/root/gst-nelk.sh included into the NELK root file system, which sets the following environment variables: <pre>export GST_REGISTRY=/home/root/gst-nelk_registry.binexport LD_LIBRARY_PATH=/opt/gst/libexport GST_PLUGIN_PATH=/opt/gst/lib/gstreamer-0.10export PATH=/opt/gst/bin:$PATHexport GST_PLUGIN_SCANNER=/opt/gst/libexec/gstreamer-0 Alpha.10/gst-plugin-scanner</pre> ==== Video decoding and playing====
=====Use case #1=====
=====Use case #2=====
=====Use case #3=====
=====Use case #4=====
=====Use case #4.1=====
=====Use case #4.2=====
=====Use case #4.3=====
=====Use case #4.4=====
=====Use case #4.5=====
=====Use case #4.6=====
==== Video capture and encoding ====
===== V4L2 1080p60 Capture/HDMI display =====
===== V4L2 1080p60 Capture/H264 encoding/HDMI display =====
===== V4L2 Capture, decimanted =decimated ====
===v4l2-based applications===
==== saLoopBack ====
==== UVCcapture Tool ====
=== Dual EMAC mode (NaonEVB-Lite)===
=== Extending the root file system ===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.
→V4L2 Capture, decimanted
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{{AppliesToNaonAppliesToNaonFamily}}
{{Applies To NaonEVB-Lite}}
{{Applies To NaonEVB-Mid}}
==Introduction==
This page lists some statistics and information about real use cases based on [[Naon Embedded Linux Kit (NELK)]].
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%
</pre>
* 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
</pre>
* 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
</pre>
* 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
</pre>
* 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
</pre>
The two Ethernet interfaces on [[Category:NaonEVB-Lite|NaonEVB-Lite]] can be used as:
The following instructions describes how to configure opkg in order to add more packages in order to provide a richer set of libraries, tools and applications.
