Told You SO!!! I am the greatest

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sunilramansunilraman
Posted:
in General Discussion edited January 2014
Just wanted to brag a little



remember how i was doing all those test h.264 encodings? trying to find a sub-720p that would work,



say 576p or 448p ???



well Apple is now posting it's enhanced-but-not-quite-high-definition trailers as



480p (852x480 for 16:9) (yay! my first use of dashboard calculator)



as well as



720p



1080p



probably to show that G4 Macs still can run "hi-def" h.264 smoothly... so 480p is what they've settled on, 852x480, as a 'sub-high-def' "standard" for smooth playback on G4 Macs. new iMac g5s can handle 720p by reports received so far...



so...



G4: 480p (852x480pixels) 16:9

imacG5: 720p (1280x720pixels)

dualG5: 1080p (1920x1080pixels)



this is also useful for videomakers who are going to distribute nice hdtv or blu-ray ripped *ahemm ohhh i mean videomakers who will distribute LEGAL trailers and other such material.... 852x480pixels is a nice res to shoot for that should play back okay on MOST g4 macs



480p could be the new iTunes Video store resolution but that's a whole 'nother thread

Comments

  • Reply 1 of 5
    sunilramansunilraman Posts: 8,133member
    if you pardon the ego trip a little longer, here's my original blog post "way back" in 10-april-2005



    http://switchcraft.blogspot.com/2005....html#comments



    where i defined "448p" as a new sub-hdtv "standard" to shoot for on g4 macs



    PS. you don't have to register to comment on that blog page, fire away



    edit: 480p KICKS ASS on G4s. great resolution, reasonable size, virtually NO dropped frames on my iBook 933mhz g4 256mb ram tiger os 10.4.1.



    AWESOME. BLOODY AWESOME.

    our new standard for internet-delivered video
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  • Reply 2 of 5
    thttht Posts: 6,019member
    Hey, what about 320p for my 500 MHz iBook?



    Hmm, my wonderful gen-1 dual USB iBook is 4 years old now. Wish I could get a new laptop, but it will have to wait until Fall at the earliest, and likely Spring 06. Hopefully by then, there will be a Mac laptop capable of 1080p. A 2 GHz dual-core 8641D, 2 GHz 970mp or some new PPE/SPE derived laptop should do the trick.
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  • Reply 3 of 5
    sunilramansunilraman Posts: 8,133member
    Quote:

    Originally posted by THT

    Hey, what about 320p for my 500 MHz iBook?

    .....



    umm... i think 320p is called VHS

    he he just messing around...
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  • Reply 4 of 5
    buonrottobuonrotto Posts: 6,368member
    Isn't 480p current DVD resolution, aka EDTV?
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  • Reply 5 of 5
    sunilramansunilraman Posts: 8,133member
    Quote:

    Originally posted by BuonRotto

    Isn't 480p current DVD resolution, aka EDTV?



    shhh...



    SUMMARY

    edit: yes apple's 480p = 16:9 480p EDTV but is higher-res than 4:3 480p EDTV



    apple's 480p is higher-res than DVD NTSC coded at 720x480

    apple's 480p is not necessarily higher-res than DVD PAL encoded at 720x576

    /SUMMARY





    well, apple's use of "480p" is a bit fuzzy in this case.



    because apple's 480p is 852x480 for 16:9,

    effectively that's 408,960 pixels



    EDTV is oriented around 4:3 ratio, so it's

    640x480

    ~480p referring to 4:3 EDTV is lower resolution than apple's 16:9 480p



    DVD...

    720 × 480 for NTSC**

    this is where it get's fuzzy because it's not square pixels exactly, but again

    ~DVD-480p-NTSC is lower resolution than apple's 16:9 480p IIRC



    yeah, it's a bloody morass of technical mumbo jumbo out there. i'll just follow what apple says



    like i said its not a 'standard' that apple has made up, think of it more of a marketing term: 1080p and 720p, yes, well-accepted 16:9 HDTV standards, but marketing wise, just say 480p, referring to 16:9,



    and you can say

    "my G4 apple mac does enhanced definition WIDESCREEN video"





    Warning: Rambles on a bit - for those video mavens feel free to correct me if i have f8cked up anywhere...



    **DVD anamorphic discussion

    ok. here's the tricky bit. let's take a 2.35:1 anamorphic or 'widescreen' encoded DVD. play it back in DVD player and measure the pixels of your window. the width is more than 720pixels. WTF? you may say. but here, the 2.35:1 image is 'squeezed' into a 4:3 format to make the most of the available 720x480 pixels... TVs and apple DVD player, for example, unsqueezes this, so you end up with like a 800something by 300something pixel image for 2.35:1 films.



    overall 852x480, marketed now as "480p" by apple on its "hi-def" quicktime7 website, has better resolution than 480p EDTV and 480p DVD standards, and caters directly to a 16:9 HDTV-esque widescreen ratio



    anamorphic squeezing for digital delivery doesn't make sense, because as we've already seen with DIVX for example, just deliver the right aspect ratio right of the bat, for example a 640x272 digital video file for a 2.35:1 *ahem* movie.



    with broadcasters though, they assign a certain bandwidth for say, 720p, so that's 1280x720 effective pixels. it will be interesting if they do some sort of anamorphic squeezing with this. because, like you see in the 720p apple trailers, a 2.35:1 film will only use 1280x500+ pixels... black bars = wasted space in a sense. if you had a 1080p capable screen, an anamorphic-delivered 720p broadcast stream could potentially give you like 1440x600 or something image when de-anamorphosed



    phew brain overload... can you tell i've been obsessed with this digital video stuff for a while? well... anyway thankfully i have a part-time multimedia job now, so this is all a fun hobby and job rolled into one... my parents will understand someday
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