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Difficulty meeting MPEG-2 specs for TV channel using Compressor
One of my clients was recently given the option to submit his TV spots as MPEG-2 files. I was unable to create files with the proper specs using Compressor, as it doesn’t seem to have granular control over chroma sampling in MPEG-2 files. The required file specs are listed below:
Video Specifications
Encoding . . . MPEG-2
Preferred. . . 18Mb/s
Scanning. . . . 480 60i (upper field first)
Pixel Aspect Ratio. . . 0.9
Aspect Ratio. . . . 4:3
Chroma. . . . 4:2:2 (MP@ML) (720*512)
GOP. . . . All Allowed, IBBP preferred
Frames per second. . . . 29.97 (NTSC)
Stream Type . . . Program Stream
Audio – MPEG-1, Layer 2 . . . 384Kb/s Stereo
Audio – Dolby AC3 . . . N/A
Digital Audio Level. . . –20dBfs
Luminance Level Max. . . . 100 IRE
Chroma Level Max. . . . 120 IRE
Setup level. . . 7.5 IRE
Timecode. . . Not UsedI was unable to create an MPEG-2 file with 4:2:2 chroma sampling @ 720×512. Is it possible to do this with Compressor? If not, can anyone recommend software that will generate files that meet these specs?
Thanks in advance.
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5 Replies
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Haven’t had to do this, but you might try Telestream Episode or Episode Pro. You can do a free sample of up to 30 seconds I believe without paying for the software to see if you can get the specs you need.
Walter Biscardi, Jr.
Editor, Colorist, Director, Writer, Consultant, Author.
HD Post and Production
Biscardi Creative Media“Foul Water, Fiery Serpent” now in Post.
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Seeing it is a color space of 422 you need episode – compressor can only do 420 mpef – episode is great as it intergrates into compressor – I know this cause I spent 5 years in a company called Adstream – we digitally delivered over a million tvc
MINTedit
London, EnglandMac Pro – 8gig ram – FCS 3 – CS4 – Cinema 4D
Film, Edit and Deliver -
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I’m not sure about the size 720×512, but I have seen a check box in compressor that has YUV 4:2:2 color encoding (Not for DVD use).
Documentation from Apple for Compressor 3.
YUV 4:2:2 Color encoding (Not for DVD use): Select this checkbox to enable 4:2:2 color encoding. This option is supported in the creation of MPEG-2 elementary, program, and transport streams, but it is only available when the Stream Usage pop-up menu is set to Generic.
I think you should be fine if you set the size and export to uncompressed 10 bit 4:2:2 and then use that in compressor.
Powermac G5 2.5GHz Quad Core
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I am having a similar issue, but don’t want to pony up the cash for new compression software. I have cleaner 6.5.1 and compressor 3. it seems that the apple spec’s claim you have 4:2:2 control in compressor’s mpeg 2 format settings but I dont see it enabled. and when i try to use cleaner to output, though i can set the chroma, I can’t get the mpeg 2 format in full HD (1920×1080) to work with the mpeg 2 size limitations – I get a “image size not divisible by 16” error. anyone know of a work around? I’m trying to export for DGfastchannel and the chroma level is the only hiccup i seem to be running into.
thx!
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