Why two sets of dimension reading of MOV movies

[David1105]

When using a third-party app which reads the dimensions (Width x Height) of a MOV video file (QuickTime codec), it gives the numbers for the video as 720x480, which is different from the reading of 853 x 480 by QuickTime's Movie Inspector (Use QuickTime player to play the video file and then go to the Windows menu and select "Show Movie Inspector", it'll display two sets of video dimension data: Normal Size and Current Size).

My questions are:

1. Why such two different sets of dimensions of video data are for the same video?

2. How can obtain the latter set of reading (853 x 480)? I tried with ffmpeg etc. and they all returned 720 x 480?

Thanks!

[neuron2]

Maybe it's anamorphic and so one is the encoded size and one is the display size.

[communist]

Current size is what the QT window has been resized to - "currently". In your case it's most likely anamorphic, 853:480 ~ 1.78, same as 16:9.

[David1105]

Current size is what the QT window has been resized to - "currently". In your case it's most likely anamorphic, 853:480 ~ 1.78, same as 16:9.

Thanks!

That's what I guessed but wasn't sure...

However, how can I get this number 16:9, by using either a utility like MediaInfo, or ffmpeg or any other tool, or programmatically?

I tired with MediaInfo and ffmpeg, both gave me the numbers of 720 x 480 (= 1.5), instead of 853:480 (1.78).

[foxyshadis]

Did you look at the Display Aspect Ratio value in MediaInfo?

[David1105]

Did you look at the Display Aspect Ratio value in MediaInfo?

Yes, I did.

Here's the data for two sample videos:

Video 1:
*****************
PAR: 1
DAR: 1.5
W x H: 720 x 480 (Normal Size by QT Player: 853 x 480)
*****************

Video 2:
*****************
PAR: 1
DAR: 1.333
W x H: 960 x 480 (Normal Size by QT Player: 1280 x 480)
*****************

Still cannot make any sense out of these data...The only thing is 960 x 1.333 is ~1280... :)

Thanks for your help!

[CruNcher]

Ehh isn't NTSC 16:9 = 1.82 ???