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Creating a specific HD MPEG2 file

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Michael Thompson
Creating a specific HD MPEG2 file
on Sep 5, 2012 at 6:06:37 pm

I'm having trouble figuring out how to create the following file for a client:

- All files must be delivered as elementary stream.
- Codec: MPEG2 ... Frame Size: 1920x1080 ... OAR: from 1.78:1 up to 2.35:1
... Frame rate: 50i ... Stream Type: MPEG2 Video Stream (Main Profile @ High Level)
... Field Dominance: Upper Field First .... Bit rate: not less than 50 Mbit/s CBR
... Chroma Format: 4:2:2

Certain specs I can find/create separately but not all together ... for example, trying to get 50Mbit/s CBR, I can only seem to find 40 at the most.

Now, the source files I'm using are as follows:
- Apple Pro Res, 25fps, 1440x1080, 48k 16bit
- Apple Pro Res, 25fps, 720x576 (16:9), 48k 24 bit
Do these need to be converted to 1920x1080 50fps before sending to Compressor or other software?

Files for client have to be MPEG2 ... cannot send them a .mov file

Using FCP 7.0.3 and Compressor 3.5.3

I deal more with dubbing and basic editing, so I'm not as well versed when it comes to digital conversions and codecs. Any suggestions would help ... thanks!

- Mike -


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Rafael Amador
Re: Creating a specific HD MPEG2 file
on Sep 6, 2012 at 4:45:43 am

[Michael Thompson] "Certain specs I can find/create separately but not all together ... for example, trying to get 50Mbit/s CBR, I can only seem to find 40 at the most. "
That's the limit you can get in Compressor.
Any 50Mbps/422 option will be .mov.
To get what you want I think you need Telestream's "Episode Pro" (995$$).
Anyway I suggest you to ask in the "Compression Techniques" forum.


[Michael Thompson] "Now, the source files I'm using are as follows:
- Apple Pro Res, 25fps, 1440x1080, 48k 16bit
- Apple Pro Res, 25fps, 720x576 (16:9), 48k 24 bit
Do these need to be converted to 1920x1080 50fps before sending to Compressor or other softwa"

Compressor can do all the resizing while is transcoding.
rafael

http://www.nagavideo.com


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Dave LaRonde
Re: Creating a specific HD MPEG2 file
on Sep 6, 2012 at 6:44:14 pm

If you need to make 1920x1080 files, you should also know that the aspect ratio for that resolution is ALWAYS 1.78:1. You'll need to fake the 2.35:1 look through letterboxing.

Raphael's right about that Telestream Episode Pro product.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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