Detect identical & black frame in video with ffmpeg?

Thumbnail creation is a very needed feature for any social networking site. Obviously, ffmpeg is the ideal solution for generating thumbnail.

Problem-1: Detecting identical thumbnails

Fortunately, we have a good solution--libpuzzle. It would be ideal to have a filter in ffmpeg for that.

Problem-2: Detecting black/dark frames

I'm still keenly looking for a solution tied up with ffmpeg. When Google turned no help, Heleena (my wife) solved it by calculating average luminance value of the frame and ignoring the frames based on certain preset threshold value--which worked better at that time.

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Koodankulam - another ISRO? And best critic from John Rubert

Mahendragiri ISRO is situated close to my hometown and now Koodankulam ... When ISRO was started, there were no industries. At that time, everyone was happy about the project as many believed that it would create more employment opportunities. (As per some conspiracy theories, Kanyakumari was sidelined for being Congress-fort then). Later on few guys got job there... and later on they complained that they're been transferred to other place for being local guys--by Anti-Tamil seniors. Few months ago, an Engineer from Secundrabad who's working in ISRO joined me in train. The guy shared some information... he's recruited/recommended by his Secundrabad colleague, his ambition is to work in NASA, his job is just to check meter and make a note of it..., many guys have similar boring jobs... Anybody who's complaining IT guys should talk to these ISRO guys! ISRO is a big example on how Indian government is spending crores of rupees lavishly. Majority of the projects--ac...

Google used PHP?

I wanted to know what are the pages in Google are powered by PHP . I have tried various keywords including "inurl"--but it produced huge list. So I tried "filetype:php" and it worked very nice. The real keywords are php filetype:php site:google.com Google used PHP?

Interview question #2

This is related to PHP's array . An array has number of elements. All elements are integers and unique, which means there is no repetitive integers. (e.g.) $foo = array(7, 5, 9, 13, 2, 8); You have to sort the array, provided: You should scan the elements only once. You're not allowed to compare the elements when sorting. (i.e., you're not supposed to use any comparison operators) Sorted resultant array may not be the source array. How will you do that?