Proof of Concept hardware accelerated H264 encoder for sunxi

This is a basic example for using the H264 hardware encoder for sunxi SoCs.

It is just a proof of concept and not recommended for production use!

Limitations:

• no B frames
• constant QP
• only raw nv12 or nv16 input and bytestream output
• ... many more

The old mplayer doesn't seem to like the raw bytestream output, maybe our bytestream is still a little bit erroneous.

Usage:

make

ffmpeg -i <inputfile> -pix_fmt nv12 \
   -vf pad="width=trunc((iw+15)/16)*16:height=trunc((ih+15)/16)*16" \
   -f rawvideo pipe: | ./h264enc - <width> <height> <outputfile>

It is important that the input data is in nv12 format and has a width and height multiple of 16, this is ensured by the "-vf pad" above.

For example:

ffmpeg -i bigbuckbunny.mpg -pix_fmt nv12 \
   -vf pad="width=trunc((iw+15)/16)*16:height=trunc((ih+15)/16)*16" \
   -f rawvideo pipe: | ./h264enc - 854 480 bigbuckbunny.264

ffplay bigbuckbunny.264