2 years, 5 months ago
How many pixel is good enough to make a professional quality film from a cell phone video camera?
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This depends on what you mean by professional quality film. According to http://www.adobe.com/devnet/flash/learning_guide/video/part06.html the US TV standard (NTSC) requires 720x486 pixels, while DV videocams use 720x480 (to maintain a multiple of 16 for ease of processing). If this is what you have in mind, you'd need only 345,600 pixels (or 0.35 mega-pixels). This is such a low pixel count that almost any camera on a modern phone should easily exceed it.
The more problematical part is the frame rate. The NTSC standard uses 30 frames per second (fps), while the European TV standard, PAL, uses 25 fps. The real question thus is if your phone camera can handle about 250 Mbps (mega bits per second). This number is arrived at by multiplying the number of pixels by 3 bytes (or 24 bits) for color handling per pixel, by 30 fps. Since phones are not expected to provide video-cam level performance, I suspect this might be the spec they'd have a problem with.
By the way, the highest definition HDTV (see discussion at http://www.cnet.com/hdtv-resolution/ ) has 1920x1080 pixels, or about 2 mega-pixels. To get this level with a 30 fps movie, you'd need to process about 1.5 Mbps.
The more problematical part is the frame rate. The NTSC standard uses 30 frames per second (fps), while the European TV standard, PAL, uses 25 fps. The real question thus is if your phone camera can handle about 250 Mbps (mega bits per second). This number is arrived at by multiplying the number of pixels by 3 bytes (or 24 bits) for color handling per pixel, by 30 fps. Since phones are not expected to provide video-cam level performance, I suspect this might be the spec they'd have a problem with.
By the way, the highest definition HDTV (see discussion at http://www.cnet.com/hdtv-resolution/ ) has 1920x1080 pixels, or about 2 mega-pixels. To get this level with a 30 fps movie, you'd need to process about 1.5 Mbps.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
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