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Do I sense a stealth advertising campaign?
Also I note you omitted the PICVideo MJPeg codec. Any good reason why?
Dr. MordridDr. Mordrid
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An elephant is a mouse built to government specifications.
I carry a gun because I can't throw a rock 1,250 fps -
I found this picture somewhere and just want to see some comments about it...
PICVideo MJPEG is my favorite codec, it's simply The Best !
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What does it mean?
I don't understand this chart as PSNR is not known for me
Could anybody explain?
ThxComment
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PSNR = Peak Signal to Noise Ratio
It's a measure of quality. Basically it's a set of calculations done to quantify the differentces between the original image vs. the compressed image.
More info here.....
A small command line PSNR tool can be found near the bottom of the page here;
Just type psnr.exe /? for instructions.
Dr. MordridLast edited by Dr Mordrid; 28 July 2003, 09:29.Dr. Mordrid
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An elephant is a mouse built to government specifications.
I carry a gun because I can't throw a rock 1,250 fpsComment
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Visicron? Where's this codec from? Looks expensive
Anyone try the JPG2000 codec from Morgan yet, btw? Any problems?
NekoComment
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It's a wavelet based video codec. Wavelets can give high compresson ratios with lower quality loss than DCT based codecs. From what I see on Visicrons website;
it's mainly a video conferencing codec so far.
The best info I could find is this *.pdf of a slideshow on a Russian site;
which appears to the be the source of the image above.
Dr. MordridLast edited by Dr Mordrid; 28 July 2003, 09:38.Dr. Mordrid
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An elephant is a mouse built to government specifications.
I carry a gun because I can't throw a rock 1,250 fpsComment
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Thanks for the info, Doc. Doesn't seem like this one's ready for NLE yet. Pity, looks promising.
On a different note, could anyone tell me where a good DV codec, like Canopus for instance, would situate on the above graph?
NekoComment
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Yes, it is the source...Originally posted by Dr Mordrid
The best info I could find is this *.pdf of a slideshow on a Russian site;
which appears to the be the source of the image above.Comment
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You can download Matrox's DigiSuite softcodec package from their public FTP. This includes DV type 1, DV type 2, DVCPRO, DVCPRO50 (a 4:2:2 DV codec), MPEG-2 I-frame in an *.AVI wrapper and their M-JPeg codec (.05 - 17.95 mb/s) though the M-JPeg only works at 720x486/576.
Dunno about the strict legalities of using them though....so maybe someone from Matrox can chime in about that before anyone posts a URL.
Dr. MordridDr. Mordrid
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An elephant is a mouse built to government specifications.
I carry a gun because I can't throw a rock 1,250 fpsComment
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Thx Doc very much.
Very informative.Comment
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This Matrox DV softcodec, does it import DV files whilst keeping the original luminance levels (16-235, a.k.a. CCIR601) or does it convert it into 0-255? Most codecs convert the luminance levels to and fro so it looks good on a PC screen.
Unfortunately many video editing programs (such as pinnacle studio 8) do not take this into account and thus merrily produce mpeg-2 files with the full 0-255 range which is not DVD compliant. The darks are too dark and the brights too bright.Resistance is futile - Microborg will assimilate you.Comment
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The MainConcept DV codec does support both ranges, and allows selection of which you want.
Adobe has licenced both MainConcept MPEG2 and DV codecs for use in Premiere Pro.
J-kunComment
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Given the fact that MS DirectX 8 already contains a DV codec, how do you select between the two?Resistance is futile - Microborg will assimilate you.Comment
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MSPro7 can support more than one DV codec as long as they use different fourCC's. A fourCC is a "four character code" used to distinguish codecs.
AFAIK the NTSC 16-235 levels are preserved in the Matrox DigiSuite codec. The RT.X100's codecs are switchable.
The MC MPEG codec used in PPro is a 2 pass encoder.
Dr. MordridLast edited by Dr Mordrid; 1 August 2003, 03:29.Dr. Mordrid
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An elephant is a mouse built to government specifications.
I carry a gun because I can't throw a rock 1,250 fpsComment
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