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Difficulty meeting MPEG-2 specs for TV channel using Compressor

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Alan Okey
Difficulty meeting MPEG-2 specs for TV channel using Compressor
on Oct 15, 2009 at 9:54:12 pm

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 Used

I was unable to create an MPEG-2 file with 4:2:2 chroma sampling @ 720x512. 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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walter biscardi
Re: Difficulty meeting MPEG-2 specs for TV channel using Compressor
on Oct 15, 2009 at 10:03:51 pm

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.

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Craig RussillRoy
Re: Difficulty meeting MPEG-2 specs for TV channel using Compressor
on Oct 16, 2009 at 5:22:44 am

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

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Rafael Amador
Re: Difficulty meeting MPEG-2 specs for TV channel using Compressor
on Oct 16, 2009 at 6:26:11 am

Right.
The only options for output 422 MPEG-2 in FCS are for XDCAM.
Rafael

http://www.nagavideo.com


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Hanabal Khaing
Re: Difficulty meeting MPEG-2 specs for TV channel using Compressor
on Jan 29, 2010 at 7:29:22 pm

I'm not sure about the size 720x512, 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.

http://documentation.apple.com/en/compressor/usermanual/index.html#chapter=...

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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Melanie Smith
Re: Difficulty meeting MPEG-2 specs for TV channel using Compressor
on Apr 22, 2010 at 10:24:58 pm

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 (1920x1080) 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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