Please add 480p for DVD

[Brandon K]

In the "Video Resolution" field, please add the option "480p" for DVDs.

The current options are "480i" and "576i".

There seems to be a lot of myth and incorrect information surrounding this that folks have accepted as fact over the years.

If you have a progressive source that was encoded progressive correctly, or a progressive source that was encoded interlaced correctly, the difference is very obvious when the DVD video stream is viewed natively without any filters, or without any playback hardware getting in the way.

Below are examples from the Robin Hood Gold Collection DVD, including the actual technical details of the video streams. The interlaced example is the "Ye Olden Days" cartoon that's included on the disc as a bonus feature. Please view the image at full size to see the interlacing properly.



As I start going through my DVD collection, it would be great to have this option added so that I can submit all the corrections in the database.

[Brandon K]

(Reserved for a list of DVDs confirmed to have main content at 480p.)

[khalbrae]

Would be an interesting change but anthing other than Blu-ray and variants of it is an afterthought on this site.

[Deciazulado]

You mean the video is truly encoded as 24p on the NTSC disc, or that the video stream has frames flagged as 24p?

I think it's the later. But I'm now using 16K Eloi rings so I'm a little behind in following DVD tech.

[Brandon K]

Originally Posted by Deciazulado

You mean the video is truly encoded as 24p on the NTSC disc, or that the video stream has frames flagged as 24p?

It's hard to say, I looked at the detected info as per the original post, I also tried looking at interlaced frame detection with ffmpeg but I didn't get definitive results.

But in either case - and I also believe some discs with this 480p content are 23.976 while others are 29.976, but that is another issue, as this site does not include this in the disc specs - again, as per the original post, I am looking at the frame by frame, unfiltered playback... and there is a clear difference between one disc that has interlaced frames (look at the image full size) and another where every single frame is a complete image with no interlacing.

It also gets more complicated in that some video streams may actually have mixed progressive and interlaced content.

But my intention was really for clear cases where you have 23.976 fully progressive content, such as the Robin Hood example. It is a worthy quality difference when you're researching old versions of movies, especially with Disney when owning older versions is desirable, given how they've treated their animated classics on Blu-ray.

[WaltWiz1901]

Originally Posted by Brandon K

It also gets more complicated in that some video streams may actually have mixed progressive and interlaced content.

I can confirm that there are indeed a few discs in my collection where some of the video streams are like this; for instance, the 2001 DVD of Dumbo starts out with the opening titles encoded as 30i interlaced and switches to 24p progressive for the main body of the film, as do most of the shorts on the Walt Disney Treasures set The Adventures of Oswald the Lucky Rabbit (the only exceptions are Trolley Troubles, Bright Lights, and Tall Timber, which are completely interlaced, and The Fox Chase, which is completely progressive).