frame{crc/md5}: set the stream timebase from codec timebase.

frame{crc/md5}: set the stream timebase from codec timebase.

Right now those muxers use the default timebase in all cases(1/90000).

This patch avoid unnecessary rescaling and makes the printed timestamps
more readable.

Also, extend the printed information to include the timebases and packet
pts/duration and align the columns.

Obviously changes the results of all fate tests which use those two
muxers.