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Compression for broadcast - am I doing this right?

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Dylan Hargreaves
Compression for broadcast - am I doing this right?
on Sep 19, 2011 at 10:28:25 pm

Hi folks,

A documentary we produced has been picked up for broadcast, which is my first foray into TV since I quit that industry 4 years ago to set up my little web video business.

We shot at full 1920x1080 HD, but the broadcaster is asking for 720x576 full height anamorphic. For the pixel aspect ratio I'm selecting PAL CCIR 601 (16:9).

The resulting export is contained in a 4:3 box with no letterboxing and the picture 'stretched' vertically. Does this mean the broadcaster will then 'correct' the image for transmission or am I doing something wrong?

Cheers in advance!


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Craig Seeman
Re: Compression for broadcast - am I doing this right?
on Sep 19, 2011 at 10:39:05 pm

Did they give you any codec information?
What player are you using to play the file?



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Dylan Hargreaves
Re: Compression for broadcast - am I doing this right?
on Sep 20, 2011 at 8:57:05 am

Hi Craig,

ProRes422, DV-PAL, 8bit uncompressed or 10 bit uncompressed are all acceptable. I've tried ProRes so far and used QT7 to view the output.


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Dylan Hargreaves
Re: Compression for broadcast - am I doing this right?
on Sep 20, 2011 at 10:30:35 am

Hi,

Compressing in DV-PAL anamorphic has done it - now displays in the proper aspect ratio.

Not sure what the pixel resolution would be if I did want to use ProRes though...

Thanks anyway!


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