60i not showing as 60fps?

[Julius Smith]

Hi,
I have a Sony z5u with the memory recording unit set up as:

Rec Format: HDV 1080i
HDV PROGRE.: Interlace, ScanType: 60

When I record a short clip, I used MediaInfo to look at the file and got:
Why is the Frame Rate at 29.970??




Start time : UTC 2012-06-13 11:33:18
End time : UTC 2012-06-13 11:33:28
Overall bit rate : 26.1 Mbps
Maximum Overall bit rate : 33.0 Mbps
Encoded date : UTC 2012-06-13 11:33:18

Video
ID : 2064 (0x810)
Menu ID : 100 (0x64)
Format : MPEG Video
Format_Commercial_IfAny : HDV 1080i
Format version : Version 2
Format profile : Main@High 1440
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : M=3, N=15
Codec ID : 2
Duration : 10s 244ms
Bit rate : 24.5 Mbps
Maximum bit rate : 25.0 Mbps
Width : 1 440 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.525
Stream size : 29.9 MiB (90%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 2068 (0x814)
Menu ID : 100 (0x64)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Codec ID : 3
Duration : 10s 584ms
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : -245ms
Stream size : 496 KiB (1%)


I also brought the file into Sony Vegas, did a match properties on it and got the
HDV 1080-60i(144x1090, 29.970) template. Frame rate set as 29.970 (of course I can change this)


In CS5.5 AE, it says
1440x1080 (1.33),Separating(Upper)
29.97 fps

Should I just ignore and overwrite the 29.970 to 60?

Thanks

[Sander Vreuls]

It is 29.97 frames per second, not 60... It has 60 (well 59.94) FIELDS per second, and 2 fields make up one FRAME. This is because it's interlaced video.

[Julius Smith]

Thanks for your help.

[Peter Manojlovic]

60p is usually related to footage shot with 1280x720@60p..