This directory is used for test new seek api.
I'll modify seek_test2.c to update the test case.

instructions:
1) check a ffmpeg tree.
2) cp seek_test2.c ffmpeg/tests/seek_test2.c
3) cp Makefile ffmpeg/Makefile
4) cp test*.sh ffmpeg/tests/
5) make, and make tests/seek_test2
6) run test*.sh
