[MEncoder-users] MP4 container

[Luke]

Hi,

I have extracted the content of MP4 file which I have created

mp4info version 1.2
new.mp4:
Track Type Info
1 audio MPEG-4 AAC main, 129.683 secs, 125 kbps, 44100 Hz
2 video MPEG-4 Simple @ L1, 129.708 secs, 1200 kbps, 352x264 @ 24.00 fps
5 hint Payload MP4V-ES for track 2
8 hint Payload mpeg4-generic for track 1
9 od Object Descriptors
10 scene BIFS
 Metadata Tool: mp4creator 1.2

in order to compare with a sample file provided with Darwin Streaming Server.

Question: What does the @ L1 mean (in the video Track)

The sample file which I had differed in this place...(there was @ L3)

Thanks for comments,
Luke