Hello

here are the specifications of a video clip which I have to deliver to the TV station in Europe

I am having a lot of problem to find a way to control the bitrate and the Audio tracks.

curently I am working on MC 7.0.5  PC version.

Any help would be apriciated. I have to deliver it today.

VIDEO

Container MXF OP-1a or MOV (Quicktime) Codec XDCAM HD422
Bitrate 50Mbps CBR
Frame rate 25 frames per second

Chroma subsampling 4:2:2
Frame size (pixels) 1920x1080
Aspect ratio 16:9
Scan type Interlaced
Field order Top field first
Colour space EBU R103
AUDIO
Allocation of audio tracks 2 (stereo) EBU R48: 2a
Loudness -23LUFS (EBU R128 and ITU BS.1770-2)
Format LPCM
Sample rate 48 kHz
Sample size 16 or 24 bit

File-Export, from the dropdown menu choose to export as 'XDCAM MXF Op1a'. Make sure the project type is set to 1080/50i.

See http://avid.force.com/pkb/servlet/rtaImage?eid=ka7i0000000PCXq&feoid=00N40000002M2H1&refid=0EMi00000001JBp

Make sure your music is on a stereo track, or at least panned correctly.

Your sound mix need to have been mixed at (or normalized to) -23dB LUFS for EBU R128 compliance. If this has not been done for you, you will need to install a third party AudioSuite plugin to do this. If your mix is on dual mono tracks, this may be tricky to do. Mixdown to a stereo track, or rebuild as a stereo track before you run the plugin.

Thank you for responding.

They keep rejecting the spot due to overal bit rate to high and to many audio tracks.

I tryed the new Squeeze from sorenson, still rejected. I am lost, the bitrate is fixed, I do not see any opton of changing the bitrate.

Yes, such an XDCAM export will carry 8 channels of audio, even if you're just using two. Part of the format. You would need a more current version of MC to export more flexibible versions of Op1a MXF.

That said, the bitrate should be fine, it's probably too high due to too many audio tracks.

If you import the Op1A MXF back in, does it sound and look OK, and does it come back in as 50Mbps? If so, create a sequence from that reimported clip, pan audio correctly, and export as Quicktime, Same As Source, with the 601/709 box ticked, stereo audio.

Hello

Thank ypu for responding

I have been trying many different ways, also using Adobe encoder and the station is still rejecting the clip due to wrong Audio, 

They are requesting Stereo, and looks like I am delivering dual mono. When trying to export XDCAM file(sane as source) previously imported back to Avid I am gettin an error massage: Long GOP media can not be exported using same as source.

I am realy lost, I know the station are getting commercials from diferent sources and it works, It's been a long time and I am still nowere with this. Any more input on this matter will be very appriciated.

Thank You