Difference between revisions of "Using the i.MX27 video codec"
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* Decoding an RTP H.264 stream coming in UDP on port 6666 and displaying it at original size: | * Decoding an RTP H.264 stream coming in UDP on port 6666 and displaying it at original size: | ||
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Revision as of 16:13, 24 August 2009
The i.MX27 (used on the APF27) has an internal DSP which can be used to encode/decode video stream, coming from various sources (CSI, buffer, etc...). To use it Freescale provides some useful tools.
Installation
$ make freescale-tools
- then reflash your rootfs and you will get some stuff in /usr/bin/vpu/
Usage
mxc_vpu_test.out (yeah Freescale has strange ways to name its executables ;-) ) allows you to decode/encode video streams. This tool needs a configuration file (some are given as examples).
# mxc_vpu_test.out -c codec.cfg.net.enc.vga.h264
Decoding incoming streams on your PC
- Decoding an RTP H.264 stream coming in UDP on port 6666 and displaying it at original size:
$ gst-launch-0.10 udpsrc port=6666 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264" \
! rtph264depay ! ffdec_h264 ! xvimagesink sync=false
- Decoding an RTP H.264 stream coming in UDP on port 6666 and displaying it in 320x240:
$ gst-launch-0.10 udpsrc port=6666 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264" \
! rtph264depay ! ffdec_h264 ! videoscale ! video/x-raw-yuv, width=320, height=240 ! xvimagesink sync=false
