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Here are some approx. numbers to determine final video file sizes:
Video Bitrate = 600 (kbps)
Audio Bitrate = 128 (kbps)
About 5.3 Megabyte per minute of video duration
(About 0.0052 Gigabytes per minute of video duration)
Quality on Nook Color screen = not great, blocking apparent, would do for folks hurting for storage space
Video Bitrate = 850 (kbps)
Audio Bitrate = 128 (kbps)
About 7.1 Megabyte per minute of video duration
(About 0.0069 Gigabytes per minute of video duration)
Quality on Nook Color screen = pretty darn good, minor blocking
Video Bitrate = 1100 (kbps)
Audio Bitrate = 128 (kbps)
About 9 Megabyte per minute of video duration
(About 0.00878 Gigabytes per minute of video duration)
Quality on Nook Color screen = excellent
Video Bitrate = 1500 (kbps)
Audio Bitrate = 128 (kbps)
About 11.9 Megabyte per minute of video duration
(About 0.0116 Gigabytes per minute of video duration)
Quality on Nook Color screen = pristine, so good probably not worth the high file size.
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So, if I had an 8 gigabyte (GB) expansion card inside my Nook Color with 7 GB of free space, and the typical movie is about 110 minutes long, at a video bitrate of 850 kbps, I have room for:
110 minutes x 0.0069 GB/min = 0.759 GB/movie
7 GB / 0.759 = 9 movies
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