how do I detect 4.3 aspect in 16.9 frame

[zaprat]

Guys,

I am writing a script/bat file and I am trying to analyse a mpg file in 16:9 720x576 PAL and determine if it is source content is 16:9 format or 4:3 format with black bands down each side (for the unused portion of the frame).

Any ideas on how I can do this?

[daza67]

Guys,

I am writing a script/bat file and I am trying to analyse a mpg file in 16:9 720x576 PAL and determine if it is source content is 16:9 format or 4:3 format with black bands down each side (for the unused portion of the frame).

Any ideas on how I can do this?

From man mplayer try this:

cropdetect[=limit:round]

Calculates necessary cropping parameters and prints the recommended parameters to stdout.

<limit>

Threshold, which can be optionally specified from nothing (0) to everything (255) (default: 24).

<round>

Value which the width/height should be divisible by (default: 16). The offset is automatically adjusted to center the video. Use 2 to get only even dimensions (needed for 4:2:2 video). 16 is best when encoding to most video codecs.

Cheers
Daza