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Compressor 1 vs Compressor 2: MPEG2 HD Encoding Differences?
Greetings,
Just wondering about “MPEG 2 HD”, and what one means by that. Is it just a way of saying HD Video that’s been compressed using MPEG 2 codec? Also, is there a difference between the following two MPEG 2 streams:
(1) 1920×1080 MPEG 2 Stream compressed using Compressor 1’s “MPEG-2 6min High Quality Encode Widescreen Preset”
(2) 1920×1080 MPEG 2 Stream compressed using a similar, but “HD supportive as advertised” MPEG-2 encoder?Is there a difference in the resulting MPEG-2 stream as far as structure goes? Or will there JUST be some slight quality difference, per say?
By the way, MPEG-2 streams that come out of Final Cut Pro: are they program streams or transport streams?
Thanks!
v/r
JMcGee, Physics and Astronomy Undergrad,LSU
Visualizations Research -
4 Replies
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Both are for the creation of high definition DVDs, which currently can only be played from a computer hard drive, as HD DVD players and media are not on the market yet. Not certain what the diference is between the two, but I would bet that Compressor 2 has an updated and more efficient codec.
DRW
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Thanks,
But, regardless of what encoding “technique” I use, the RESULTING MPEG 2 streams will be “structurally” identical, correct? Isn’t this what being an ATSC standard means? Thanks again!
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In theory yes… Does that mean yes in reality??? Sometimes yes, sometimes no. Sometimes presets or codecs are released with bugs.
What’s your objective?
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DRW,
The Xbox 360 advertises that it understands and will stream MPEG-2 compressed High Definition Videos from a Windows Media Center PC to an HD-ready monitor or HDTV, resolutions up to 1080i.
Basically, I want to determine what they mean by “MPEG-2”. Intuitivly, it sounds like High Defintion images that are compressed using the MPEG-2 codec could be called “MPEG-2 HD”, and that the Xbox 360 would have no problem with it since it is HD output, which it supports.
However, I just want to verify that “there can only be one” when it comes to MPEG-2 data streams. In other words, that there are no flavors–that no matter what my encoding techniques ( Compressor 2 “MPEG-2 HD Support” ), the resulting stream is something that all ISO-standard hardware can understand if it can display HD-resolution in the first place.
The more I talk about it, the more I’m convinced it probably will. My argument is not, unfortunately, based on a Microsoft Xbox 360 Representative’s guarantee of those qualifications, but instead on the piecewise manner of MPEG 2 investigation done me. It’s frustrating.
Xbox 360 people refer me to Microsoft, and Microsoft vise reverse.
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