Video Transcoding with Raspberry Pi
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The document discusses video transcoding using a Raspberry Pi, focusing on its potential for low-cost, high-quality media streaming. It outlines a toolbox that includes Raspberry Pi, Nginx, and FFmpeg, emphasizing the importance of hardware acceleration for efficient processing. The document also presents benchmarks comparing software and hardware encoding/decoding performance.
Video Transcoding with Raspberry Pi
- 1. Video Transcoding with Raspberry Pi June 2016
- 2. A Team-centric vision… The culture of Creativity Enjoy what you do, and how you do it Grow as a professional, grow as a person Make it sustainable Talent enjoys talent. Talent attracts talent … and it is built for purpose Let’s build something awesome!, let’s make it Epic!
- 3. Agenda • Starting with some context • Toolbox –Raspberry PI –nginx –ffmpeg –Hardware acceleration components • Putting all together • Benchmark 3
- 4. Starting with some context ❖ Media encoders working with high quality streams (10 Mbps) ❖ Need of monitoring streams: ➢ From external tools/platform that could be out of device network ➢ Without the need of sending HD streams to the monitoring tools ➢ Preprocessing of the stream ■ Audio extraction ■ Audio spectrum analyzer
- 5. ❖ RPI to the rescue! ❖ Low cost computer ❖ Optimized for video ➢ HW Acceleration ➢ Up to 1080p and 50Mbps ➢ Did I say RPI is a computer? ❖ Pretty flexible ➢ It can do tons of things! Toolbox - Raspberry PI
- 6. ❖ Nginx: High performance HTTP reverse proxy. ❖ Why a HTTP reverse proxy??? ➢ nginx-rtmp-module! ➢ Flexible ➢ Easy to install, deploy and configure rtmp relay server ❖ And not just RTMP! ➢ HLS repackaging ➢ DASH repackaging Toolbox - nginx
- 7. Toolbox - ffmpeg ❖ Available for many different platforms and cpus (RPI included) ❖ Easy to use tool to: ➢ Transcode ➢ Forward streams from one point to other But what about the CPU???
- 8. Toolbox - Hardware acceleration • FFmpeg with hardware encoding/decoding support – MMAL (--enable-mmal) – OMX (--enable-omx --enable-omx-rpi )
- 9. Putting all together ffmpeg 10 Mbps 300 Kbps
- 10. Benchmark • Software decoding/encoding – libx264 encoding – 98% CPU load • Software decoding/hardware encoding – OMX HW encoding – 60-65% CPU load • Hardware decoding/encoding – MMAL HW decoding – OMX HW encoding – 20-25% CPU load ffmpeg -i bbb_sunflower_1080p_30fps_normal.mp4 -vcodec libx264 -b:v 100k -s 320x200 -map v -f flv rtmp://localhost/small/test ffmpeg -i bbb_sunflower_1080p_30fps_normal.mp4 -vcodec h264_omx -b:v 100k -s 320x200 -map v -f flv rtmp://localhost/small/test ffmpeg -vcodec h264_mmal -i bbb_sunflower_1080p_30fps_normal.mp4 -vcodec h264_omx -b:v 100k -s 320x200 -map v -f flv rtmp://localhost/small/test