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Help with TV requirements for Broadcast : MXF OP1a file

Community Beginner ,
Oct 30, 2023 Oct 30, 2023

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Hello everyone,

Need a little help with this export.

The platform where my file needs to be uploaded requires the following (quote)

 

HD (1080/50i) 

Container: MXF (OP1a)

Codec: XDCAM HD422

Format Profile: 422P@HighLevel

Frame size: 1920x1080

Aspect Ratio: 16:9

Frame rate: 25fps

Interlacing: Upper Field First

Bitrate: 50 Mbps

Chroma Subsampling: 4:2:2

GOP Lenght: 12 (M=3, N=12)

 

Audio

 

Format: PCM (Little Endian)

Channels: 2 (1 Channel per Stream)

Sample Rate: 48 kHz

Bit Depth: 16 bits/24 bits

 

In addition to that, video levels should be ITU BT.709 / EBU R103 - 2000 

It's not the first time I upload videos to the platform but it has never been smooth sailing. This time I would really like to understand once and for all if I can export a file that meets all these requirements from Premiere or I have to use a different software.

 

What I do: 

 

Video

Obviously I'm going with MXF OP1a with a XDCAMHD 50 Pal (422) Video Codec.

Frame rate, frame size, aspect ratio, interlacing are all correct.

No problem so far, then we have:

 

Bitrate: Premiere won't let me adjust bitrate (I assume it's fixed for this particular Format + Codec combo, and it's what XDCAMHD50PAL stands for)

Chroma subsampling: again can't be adjusted but I would imagine that (422) means just that.

GOP Lenght: I can force fixed lenght and closed GOPs but beyond that I can't manually adjust values.

 

Audio

 

Format: I'm only given the choice for Uncompressed audio

Sample Rate: 48000 Hz (can't be changed but that's ok)

Channels: 2 Channels

Sample size: can either pick 16 or 24

 

Video Limiter

 

My options are

100 IRE (SMPTE Range)
103 IRE

105 IRE (EBU R103 Preferred)

109 IRE (SDI limit) 

I can't find a perfect match for ITU BT.709 / EBU R103 - 2000 so I just go with EBU R103 preferred)

 

My file gets automatically rejected. I can call and ask them to check and they'll fix it, but I'd really like to get on top of this once and for all; is this sheet just outdated, is Premiere lacking a couple settings, or am I doing something wrong here ?

Thanks in advance !

 

T.

 

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Export , Formats

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LEGEND ,
Oct 30, 2023 Oct 30, 2023

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Explorer ,
Nov 09, 2023 Nov 09, 2023

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Having some of the same issues. Have you found out how to change the bitrate for the vendor? Thanks

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Engaged ,
Nov 11, 2023 Nov 11, 2023

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Specs from broadcasters are often outdated, and too specific. Premiere Pro will make OP1a exports that adhere to the standard, so you should not be able to create a non-standard file. It seems you've doen everyhting right, so I'm guessing that the rejection is caused by the audiuo or video levels. 

I think you'll just have to ask them why the file is rejected - or you'll just be guessing. When you know why it's rejected, at least you have a chance to fix it. If it's the video levels, and no setting in the Video Limiter effect works, there are some brute force methods I can explain. But first you'll have to find out what it is about the file that upsets their system.

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LEGEND ,
Nov 11, 2023 Nov 11, 2023

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Jarle's right. You need the specifics of the rejection report.

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