New Solution Can Cut Video File Size By Half – Without Losing Quality
1–10 of 43 posts
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#2I'm a bit sceptical of such glorious claims from a company that apparently just made a UI for a libjpeg.
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#3Previously on HN: http://news.ycombinator.com/item?id=2940505
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#4I'm a bit sceptical of such glorious claims from a company that apparently just made a UI for a libjpeg.
AFAIK JPEGmini has much better psychovisual optimization than libjpeg, so I think their claim that they can compress JPEG better within limits of the format is fair.
The way you encode lossy formats makes a lot of difference. For example the same x264 encoder gives dramatically worse results when aiming for optimal PSNR rather than using its psychovisual optimizer:
• http://x264.nl/developers/Dark_Shikari/imagecoding/x264.png
• http://x264.nl/developers/Dark_Shikari/imagecoding/x264_psnr...
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#5Of course, until you compare 1by1 pixel, you see no difference.
But when you do, yeah, I understand why size drops is that big.
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#6Previously on HN: http://news.ycombinator.com/item?id=2940505
It is true that it's the same company, however, the link you're referring to is about image compression and not video compression.
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#7Previously on HN: http://news.ycombinator.com/item?id=2940505
So, in the case of jpegs, their compression is not lossless, they just claim the losses are not that perceptually visible.
Apart from the strong PR claims, this is actually not that bad, no? If you have two lossy compressions, but one is perceptually better, you will rather use the perceptually better one, no?
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#8Previously on HN: http://news.ycombinator.com/item?id=2940505
So, in the case of jpegs, their compression is not lossless, they just claim the losses are not that perceptually visible. Apart from the strong PR claims, this is actually not that bad, no? If you have two lossy compressions, but one is perceptually better, you will rather use the perceptually better one, no?
I see this in the same way that apple pitches the retina display (where supposedly you wouldn't be able to more finely resolve pixels from some standard distance).
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#9Especially since this states H.264 compliance, I'd be willing to say this can't possibly live up to it's claims.
Video encoders are notorious for their bloated claims and faulty comparisons. After a quick perusal of their site I see they compare themselves only to web-m, and use generalized %'s to claim differences between products and processes.
They say they've optimized for human perceptual quality. Perhaps they have. But did they really do a better job than the open source H.264 alternative (x264) used by everyone from YouTube and Hulu, to Facebook? One thats been in development for _years_ now and beats just about everything thrown at it in a fair comparison? I think not. I'd love to be wrong though.
When they do eventually come out with comparisons, I hope they have read this first : http://x264dev.multimedia.cx/archives/472
Re: New Solution Can Cut Video File Size By Half – Without Losing Quality
#10I'm a bit sceptical of such glorious claims from a company that apparently just made a UI for a libjpeg.
AFAIK JPEGmini has much better psychovisual optimization than libjpeg, so I think their claim that they can compress JPEG better within limits of the format is fair. The way you encode lossy formats makes a lot of difference. For example the same x264 encoder gives dramatically worse results when aiming for optimal PSNR rather than using its psychovisual optimizer: • http://x264.nl/developers/Dark_Shikari/imagecoding…
Is it not a bit ironic to be linking to x264 developers to support the thesis that a new H.264 encoder can be twice as effective in compressing H.264 than the competition?
Either they've done something magical and can outcompress x264 to that degree (i.e. in the ballpark of HEVC, yet without breaking compatability), or they're comparing against a terrible H.264 encoder and they've just wrapped x264 in a proprietary shell of BS (and/or they're liars?).