H.265 gets you twice the resolution for the same bandwidth, or the same resolution for half the bandwidth.
It also uses the same techniques and principles.
H.264 is Magic
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Re: H.264 is Magic
#52H.265 gets you twice the resolution for the same bandwidth, or the same resolution for half the bandwidth.
No, it doesn't. Though that may have been the goal, HEVC has only thus far achieved an improvement of around 25%, not 50%.
In my anecdotal experience, h265 gets me 50-60% improvements in file sizes at the same quality for fairly low quality targets and the gains drop off rather quickly as you increase the quality. For videos where you don't care about the quality all that much, it's superb.
Re: H.264 is Magic
#53So what's the final car weight? It looks like you stopped at the Chroma subsampling section..
Re: H.264 is Magic
#54"Uncompressed" video has been stored, even before computers, as YUV (or some variant), not RGB as this author states. It makes me doubt everything else he says.
Re: H.264 is Magic
#55"See how the compressed one does not show the holes in the speaker grills in the MacBook Pro? If you don't zoom in, you would even notice the difference. " Ehm, what?! The image on the right looks really bad and the missing holes was the first thing I noticed. No zooming needed. And that's exactly my problem with the majority of online video (iTunes store, Netflix, HBO etc). Even when it's called "HD", there are comp…
>No zooming needed Isn't the images above the text a zoomeed version? >Here is a close-up of the original...
I took it to mean that we had to zoom to see that the holes were gone in the compressed version.
Re: H.264 is Magic
#56Earlier quoted context omitted.
This is really interesting and the imgur picture you linked (with your explanation) explains it really clearly! But when seeking, why wouldn't any local media playback seek backwards and reconstruct the full frame? It's not like the partial frame after seeking is useful - I'd rather wait 2 seconds while it scrambles (i mean "hurries up") to show me a proper seek, wouldn't everyone? What was your Internet search for f…
>why wouldn't any local media playback seek backwards and reconstruct the full frame? Most codecs/players do. VLC used to be criticized for being different in that regard. One possible advantage is istantaneous seeking, as there's no need to decode all the needed frames (which could amount to several seconds of video) between the nearest I-frames[1] (the complete reference pictures) and the desired one. [1]: plural,…
I try to use VLC when I can because it offers intuitive playlist support, but for high-resolution H.264 and friends I usually have to switch to Media Player Classic.
VLC is willing to let my entire screen look like a blob of grey alien shit for 10 seconds instead of just taking a moment to reconstruct frames.
And its hardware acceleration for newer codecs is balls. Sucks because otherwise, it's right up there with f2k for me.
Re: H.264 is Magic
#57The lossy transform is important, but I think what's actually most important in video compression is getting rid of redundancy --- H.264 actually has a lossless mode in which that transform is not used, and it still compresses rather well (especially for noiseless scenes like a screencast.) You can see the difference if you compare with something like MJPEG which is essentially every frame independently encoded as a…
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Re: H.264 is Magic
#58Ya'll wanna get the most out of your H.264 animu rips? Check out Kawaii Codec Pack, it's based on MPC and completely changed my mind about frame interpolation. http://haruhichan.com/forum/showthread.php?7545-KCP-Kawaii-C...
Re: H.264 is Magic
#59Can someone explain how the frequency domain stuff works? I've never really understood that, and the article just waves it away with saying it's like converting from binary to hex.
Re: H.264 is Magic
#60Well done. The only thing that could make this better is an interactive model/app for me to play around with. The frequency spectrum can probably be used while retouching images as well.
A video on youtube led me to Joofa Mac Photoshop FFT/Inverse FFT plugins [1] which was worth a try. I was unable to register it, as have others. Then I came across ImageJ [2], which is a really great tool (with FFT/IFFT).
Edit: if anyone checks out ImageJ, there's a bundled app called Fiji [3] that makes installation easier and has all the plugins.
If anyone has other apps/plugins to consider, please comment.
[1] http://www.djjoofa.com/download
[2] https://imagej.nih.gov/ij/download.html
[3] http://fiji.sc/