okay , got it. Thanks davilla.
Here is the report for the file I tested :
*** MediaInfo Mac // Plain text file report
2009-04-24 17:03:35 -0400
Information for File: untitled.m2ts
General / Container Stream # 1
Total Video Streams for this File -> 1
Total Audio Streams for this File -> 1
Video Codecs Used -> AVC
Audio Codecs Used -> AC3
File Format -> BDAV
Play Time -> 4mn 45s
Total File Size -> 304 MiB
Total Stream BitRate -> 8 920 Kbps
Video Stream # 1
Codec (Human Name) -> AVC
Codec Profile ->
[email protected]
Frame Width -> 1 440 pixels
Frame Height -> 1 080 pixels
Frame Rate -> 29.970 fps
Total Frames -> 8565
Display Aspect Ratio -> 16/9
Scan Type -> Interlaced
Scan Order -> TFF
Colorimetry -> 4:2:0
Codec Settings (Summary) -> CABAC / 2 Ref Frames
Codec Settings (CABAC) -> Yes
Video Stream Length -> 4mn 45s 500ms
Video Stream BitRate -> 8 110 Kbps
Bit Depth -> 24 bits
Audio Stream # 1
Codec -> AC-3
Audio Stream Length -> 4mn 45s 793ms
Audio Stream BitRate -> 448 Kbps
Audio Stream BitRate Mode -> CBR
Number of Audio Channels -> 6
Audio Channel's Positions -> Front: L C R, Rear: L R, LFE
Sampling Rate -> 48.0 KHz
Audio Stream Delay -> 10mn 0s