How to know the exact aspect ratio of a .ts stream?

andy

Hi there!

If you play a .ts file in PowerDVD, it is shown in the right a.r. However, it doesn't tell you the exact ratio.

I want to convert it to a xvid. But how do I know its exact a.r.?

There must be some clue encoded in the .ts stream, because PowerDVD knows what a.r. to use...
Most of the mpeg editing tools will tell you, project-x and pvastrumento certainly do.  Go to the  downloads area for project-x.

Thx

I loaded the file in ProjectX. After a short processing, it says:

-gt; video basics: 1280*1088 @ 29.97fps @ 0.7031 (16:9) @ 65000000bps, vbvBuffer 488

What does the '0.7031 (16:9)' mean? 16:9 = 1.77, and 9:16=0.5625...

1 : 0.7031 = 1.422 ---gt; looks like the right a.r.

Hmm. If Par=0,7031

1088*0,7031=764,9728 and Ar is

1280/764,9728=1,6732621...

I was wrong, AR is not 1 / 0.7031.

Comparing various AR's with the video that PowerDVD is showing, I think that the 16:9 ratio is the ratio of the final resolution. So if the width of the avi has to be 1024, the height should be

9/16 * 1024 = 576

This seems to give the right result, compared to PowerDVD.It is still not clear what the mysterious 0.7031 means though..

It is still not clear what the mysterious 0.7031 means though..

I think that in this value are involved pixel matrix + DAR + PAR

eb