Difference between revisions of "Video"
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==Install ffmpeg== | ==Install ffmpeg== | ||
Revision as of 04:07, 1 May 2014
Introduction
Most cameras will stream "raw video" but special media players will be required to view it unless it is first encoded to a format like mpeg, h.264 and wrapped in a container like avi, swf, mp4.
Some cameras have hardware encoders built into the camera and in addition to raw video, can also stream encoded video. The Logitech HD920 has mpeg and h.264 encoders.
Display camera modes
To install Video4Linux on the Pi:
apt-get install v4l-utils v4l-conf
To display the video formats the camera supports:
v4l2-ctl --list-formats
To turn auto focus off and manually set the focus:
/usr/bin/v4l2-ctl --verbose --set-ctrl=focus_auto=0 /usr/bin/v4l2-ctl -d 0 -c focus_absolute=25
Install ffmpeg
1. Install h.294 library libx264
git clone git://git.videolan.org/x264.git cd x264 ./configure --enable-static --enable-shared *See Note 1 below. make make install ldconfig
2. Install ffmpeg
git clone git://source.ffmpeg.org/ffmpeg.git cd ffmpeg ./configure --enable-gpl --enable-libx264 --enable-libfreetype *See Note 2
make make install ldconfig
NOTES
- Disable the assembler when compiling on the Pi[1]:
./configure --disable-asm --enable-shared
- Disable on the Pi
./configure --enable-shared --enable-gpl --enable-libx264 --enable-libfreetype --disable-mmx
