Inane_Dork said:
If you're asking if I'm an expert in the field, the answer is obviously "no." If you're trying to say I can't be right because I'm not an expert, the answer is obviously "maybe." Out of curiosity, are you an expert?
I have dealed with my this post production things with some of my works. So im talking about my experience not about Theory. You can say mpeg4hd is just as good or better, but when you have to deal for real with this, reality turn out that an mpeg2hd compressed movie look 100 times better.
Problem is you have to see how look the uncompressed material to have a clue of how much detail you lose when you compress your work.
A movie compressed in mpeg4hd have a fraction of the sharpness and detail of the original master.
An Mpeg2 hd at hig bitrate can keep almost intact the image quality.
And I said literally nothing against that. I'm not talking about recompressing. I'm talking about compressing.
I said that because compressing is what you want to avoid.
Yeah so make an example i have the hd master , it is 480 gb of size and i can choise if compress to mpeg2hd or to mpeg4hd.
Mpeg4 use an higer compression , and this means that on default compress a lot more the image whan mpeg2.
So if for example i encode a movie with mpeg4 the image get a compression ratio of 40:1
If i encode in mpeg2 i get a compression ratio of 6:1
Yes, you are right the mpeg4 stream have abetter compression, because can make the video 40 times smaller, and mpeg2 can only make the video 6 times smaller.
Make for example that the original hd master have a 100mbps bitrate, and we want to use the same bitrate for the compressed video.
We will have two video :
Mpeg2hd encoded video = 480/6 = 80Gb
Mpeg4 compressed video = 480/40 = 12gb
Well, i can assure you that where is no way in the hell the 12bg one will look better, or even near the quality of the 80gb one.
Just when you start encoding the video in mpeg4, you are going to lose with the compression a lot of data that in the mpeg2hd one stay intact.
So industry standards are necessarily the best quality solutions? I think that's the implied point here, but it's not necessarily right.
Is is not like that . These industry standard are standard because some people tryed a lot of solutions and find out wich give the better result.
Where is a reason the the most part of the dh delivering is made using mpeg2hd ts.
And where is not that . More compressed is a movie, more power you have need to decompress it, so for example you have need a more powerfull ,chip to decompress an mpeg4hd or a Wm9 hd .
This means that a chip that can decode an mpeg4hd and a Wm9hd movie would cost a lot more that the one for the mpeg2hd decoding , and this means a more expansive player.