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FixMyMovie Makes Youtube Look Less Terrible: Review on Dansdata -

Designed to enhance phone camera video, and optimized for YouTube, FixMyMovie.com could be very useful for visualists. Most of us don’t perform with particularly high-resolution footage, so the dimensions of YouTube clips aren’t too much of an issue, but the horrible compression is instantly recognizable, which I’m sure prevents plenty of VJs scavenging material from the biggest video repository on the planet. FixMyMovie might actually make some YouTube videos useable again. There’s a review with some examples on Dansdata.com:

The difference really is quite impressive. FixMyMovie has gotten rid of the prominent blocky compression artefacts in the original video, without noticeably blurring it. It’s not an amazing, incredible, action-movie-bulldust improvement, but it’s very worthwhile. Rapid camera movements - an acknowledged weakness of the enhancing technique - leave noticeable ghosts from previous frames. But they’re only noticeable if you’re trying hard to see something wrong with the video. The improvements far outweigh the problems.

I’m VJing a set for Lyrics Born on the weekend, and haven’t been able to find any reasonable quality filmclips online to cut up, so I might set FMM loose and see how it goes.

Digital Video Compression: Understanding Color Sampling

By Jaymis

DVXUser has a concise, easy to understand explanation of colour sampling methods in digital video, with diagrams!

You’ve seen the numbers: 4:2:0, 4:4:4, 3:1:1, 3:1.5:1.5, 4:1:1, 4:2:2… What does it all mean? And how does it affect your video? What’s better, what’s worse, and when does it matter?

What those numbers are referring to is a technique in digital video commonly called “color sampling.” The concept can be a bit confusing to those not used to working with video in the digital domain. In video, it’s common practice to not actually record all the color in an image, but rather to average the pixels together to cut down on the bandwidth. Color sampling is, in effect, a form of compression. The more compressed the engineers can make the color channel, the less bandwidth the signal occupies and the easier it is to record, transmit, or broadcast.

Full article, via DVGuru