720x480 mpg2 video stretched to 520x480 help

[lopaka1998]

Hi hope this is in the right section.

I've got an mpg2 video file I'm having aspect ratio problems with. I think the video is 720x480 but it always shows on screen as 540x480 and looks stretched horizontally.

Gspot shows:
Dimensions:
pic: 720x480 seq ext 540x480 4:3 ratio
sar 1.500 3:2 par 0.889 (8:9) dar 1.333 (4:3)

is there a quick way to fix this? When I use vlc and manually choose 4:3 ratio - the video looks normal.

Here are the first few hex values of the file which show the 720x480, 4:3 and 29.97 settings. How do I reset the sq ext value?

00 00 01 B3 2D 01 E0 24 0E F4 23 80 00 00 01 B5

[Baldrick]

You can try dvdpatcher. Make a backup of your mpg file first.

[jagabo]

Your 720x480 file has the display aspect ratio set to 4:3. But the sequence display extension tells the player that that 4:3 image is contained in a 540x480 portion of the frame. That means the full 720x480 frame contains a 16:9 display aspect ratio. Many players do not respect the sequence display extension.

[lopaka1998]

Got it fixed - thanks guys. dvd patcher didn't work. I tried another tool - Restream - and using the remove sequence extension option and now after remuxing - everything looks great. Thanks for explaining why it was doing that. Really strange. Now it displays in the right aspect every time.

Thanks for all of your help.

[Baldrick]

Great.

Didn't know restream had the remove sequence extension option. Adding it to the https://www.videohelp.com/tools/Restream description also.

[new_agnet]

This is my first message here, excuse me if i'm doing something wrong...
and excuse me for my bad English...
I've had the same situation before and found a detailed explanation in this page;
http://www.dvmp.co.uk/mod-video-file-format.htm
just as jagabo said
And found the reason of the mismatched Aspect Ratio information reported by Mediainfo...
Seems the mpg2 encoder causing this (for my problem)
I dont know why the "portion" is not taken as the FULL frame (480x576)
Below is the screenshot of my situation...