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720×404 MPEG2 from NTSC 720×480 wide source
i have rendered out animation codec movies from afx comps set to NTSC DV widescreen 720×480 16×9 (1.2), 29.97 no fields. when i import those into a premierCS3 NTSC DV widescreen project they look correct before rendering in the premier output window and show correct interpretation/PAR info. when i export them to the media encoder i use the NTSC progressive high-quality MPEG-2-DVD settings with the widescreen 16×9 button hi-lited.
in the viewer window of media encoder (which says the output is 720×480) the video is the right 16×9 aspect ratio but too small and shows black all around in the output window. if you go ahead and export, when you look at the actual size of the MPEG2 file that the encoder creates, it is 720×404 pixels. this doesn’t seem right, does encore stretch this file vertically to make the widescreen setting DVD or is something screwed up? shouldn’t it create a 720×480 mpeg2 file? can anyone explain this or even tell me if it’s right or not.
i’m on dual core intel mac with CS3.
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9 Replies
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Do you mean that it’s “letterboxed” with black above and below…showing a 16×9 picture in a 4:3 frame?
TimK,
Director, Consultant
Kolb Productions, -
thanks tim for quick back. no, it’s a 16×9 aspect ratio (unsquished in H) in the media encoder output window with black on the sides and the top. do you know what’s up with the 720×404 output from the encoder?
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well this is odd to me. i threw away the premier preferences, re-imported the NTSC DVwide movies into premier wide project, then export to media encoder. the video now fills the media encoder output window correctly but with the widescreen mpeg2-dvd settings the resulting exported mpeg2 file is still 720×404. (i’m finding the rendered size by opening the rendered mpeg2 file in qtime pro.)
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Can you give me the specific properties of the source material and the specific settings of the encode output?
There’s something I must be missing here…
TimK,
Director, Consultant
Kolb Productions, -
the source movies are animation codec quicktime rendered from afx in NTSC DV 29.97 widescreen format, no audio. in premier (and qtime pro) they are info’d and display correctly as 720×480 (1.2) 29.97. they are on a NTSC DV widescreen timeline that is the same.
the media encoder settings are;
FORMAT MPEG-2DVD, settings 720×480, 29.97 dropframe(fps), progressive, quality5.0,,
VR, 2 pass, min 1.50, target 6.36, max 7.99, there is no audio, the widescreen 16:9 radio button in settings is checked.after the encode which produces a 720×404 mpeg2, this is the info from the xmp file that encoder creates:
it seems straightforward but isn’t somehow. can you confirm that the mpeg2 file that should be created would 720×480 and that 720×404 is not a size that is somehow stretched vertically back to 480 when you burn the DVD in encore? thanks for taking the time to look at this. it’s driving me crazier.
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What if you “uncheck” the 16:9 button?
TimK,
Director, Consultant
Kolb Productions, -
if i uncheck the 16:9 button then the rendered mpeg is 640×480 and the video is letterboxed black top+bottom.
something i discovered is that the media encoder rendered mpeg, which qtime pro infos/displays as 720×404, when imported into premier, premier interprets & displays it as 720×480 (1.2). i went ahead and used those mpeg files to send to encore where it seems to produce a correct widescreen DVD without re-encoding. so the problem (or non-problem) is solved but the question remains for now, i guess. i wonder if it’s just a different quicktime player interpretation than adobe is using on wide-screen mpegs that media encoder produces. the 720×404 size is a square pixel 16×9 aspect ratio.
have you ever created this format mpeg2 files? what actual dimension are they in your experience in qtime? anyway, thanks again for your time.
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640×480?
Are you making MPEG2s or MPEG1?
TimK,
Director, Consultant
Kolb Productions, -
mpeg2. i think what’s going on is a discrepancy between apple/quicktime reading of the mpegs size and the way adobe and media encoder are creating it/reading it. i found an cow afx thread on this where the conclusion seemed to be:
“If your footage is 16:9 then you should encode it as a 16:9 MPEG-2. In QuickTime player this 16:9 MPEG-2 will have an odd frame size (720×404) but that is normal and correct. ”
https://forums.creativecow.net/thread/2/934557#934575
as a test i did the same routine with apple compressor and the resulting mpeg widescreen file reads as 720×404 in quicktime pro but interprets as 720×480 (1.2) in premier and burns correctly to a 16×9 NTSC widescreen DVD in encore. go figure.
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