MobileRead Forums - View Single Post - Nook Color: Can't Play sideloaded m4v videos

KryptoNyte · 12-21-2010, 05:52 PM

NoName, I assume that your black bars are only on the top and bottom when watching a widescreen movie on your Evo.

Here's my understanding:

Evo native resolution = 800 x 480 (aspect ratio = 800/480 = 1.67)
Nook Color native resolution = 854 x 480 (aspect ratio = 854/480 = 1.78)

Frequently, when using software to encode your movies, it will scale the movie down from it's original resolution, and you can typically control this scale. In addition to scaling the new output file, some software will automatically crop the black area out to further reduce file size, which will frequently result in a movie that's (for example) 854 x 360 (aspect ratio = approx 2.35). If your devices' screen resolution aspect ratio doesn't match the aspect ratio of the encoded file, then you are going to get black bars.

Some televisions have a feature where you can "fill" the screen, which works fine if aspect ratios match, but if they don't, you're going to have a stretched result, and a circle will look like an ellipse instead.

So typically speaking, black bars are good. A movie that completely fills the screen on your Nook Color will probably not fill the screen on your evo, and vice versa, as the aspect ratios are different.

You want to be encoding video for the Nook Color at 854 x <480 or less> to give best results. If it's a DVD movie, then you'll want 720 x <400 or less>.

12-21-2010, 05:52 PM	#93
KryptoNyte Shepherd Posts: 313 Karma: 663 Join Date: Dec 2010 Device: Nook Color, LG Optimus V	NoName, I assume that your black bars are only on the top and bottom when watching a widescreen movie on your Evo. Here's my understanding: Evo native resolution = 800 x 480 (aspect ratio = 800/480 = 1.67) Nook Color native resolution = 854 x 480 (aspect ratio = 854/480 = 1.78) Frequently, when using software to encode your movies, it will scale the movie down from it's original resolution, and you can typically control this scale. In addition to scaling the new output file, some software will automatically crop the black area out to further reduce file size, which will frequently result in a movie that's (for example) 854 x 360 (aspect ratio = approx 2.35). If your devices' screen resolution aspect ratio doesn't match the aspect ratio of the encoded file, then you are going to get black bars. Some televisions have a feature where you can "fill" the screen, which works fine if aspect ratios match, but if they don't, you're going to have a stretched result, and a circle will look like an ellipse instead. So typically speaking, black bars are good. A movie that completely fills the screen on your Nook Color will probably not fill the screen on your evo, and vice versa, as the aspect ratios are different. You want to be encoding video for the Nook Color at 854 x <480 or less> to give best results. If it's a DVD movie, then you'll want 720 x <400 or less>.