Frame Decoding Times

Here is a program for measuring the time needed to read/decode video frames with libavcodec/libavformat.

The program has been used on two versions of the same video having different sizes (small version and large version), and the measured decoding times have been displayed in this graph.

How to reproduce:

• Compile the analyser and download the test files
• sudo chrt -p 90 ./analyser test-small.mpg > small
• sudo chrt -p 90 ./analyser test-mid.mpg > mid
• paste small mid > cfr
• Run gnuplot, and type: plot "cfr" u 5:12

Video Frame Sizes

Some text files containing the size (in bytes), PTS, and DTS for encoded video frames:

• A low-quality mpeg2 video (without B frames), coded at 200kbps
• A good quality mpeg4 video, with B frames, coded at about 600kbps
• A Flash Video downloaded from YouTube (bitrate: about 256kbps).

Here is the program used to extract the information from the files