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Encoding PPro projects for Adtec Duet units?

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Jake Hallman
Encoding PPro projects for Adtec Duet units?
on Aug 22, 2011 at 6:06:45 pm

Been on quite the CCow odyssey - I first asked this question in the broadcast forum, they pointed me toward the Telestream Episode forum, and now those folks have sent me over here, so I apologize for the re/cross-posting.

One of my main clients for 30 second commercial spots has lots of broadcast systems that are using Adtec Duet units. We'd love to be able to encode MPEG-2 files that are ready to drop straight in, but some strange things have been happening.

Sometimes, the spots work perfectly. Sometimes audio drops out. Sometimes the video gets shaky-looking every second or so.

I'm using Premiere Pro and Adobe Media Encoder to create the files - from what materials I've been able to glean from Adtec, everything *should* work... but it's not. At least not reliably, in any case.

The folks at the broadcast outlets are pretty clueless. They typically just take DVDs, run them to Beta cassette, then run the beta cassette through Adtec's encoding software. As you can imagine, the results don't look the best.

Here's the settings we're using:

Video 720x480, 30fps
6mpbs CBR
Interlaced (upper field first, 'cause they've got some ancient Duets that require that)
4:3 AR, main profile and main level
GOP settings: 3 M frames, 15 N frames, closed GOP every 0, "automatic GOP placement" not checked.
Macroblock quantization: 10
VBV buffer size: 112x2kbytes
Noise control: Sensitivity
Write SDE: No
Force VBV delay: computed by the encoder
Write SDE: No
Intra DC precision: 9 bits
Write sequence end code: yes
Embed SVCD user blocks: no
Ignore frame interval: 0
Minimum frame percentage: 25
Pad frame percentage: 0
Audio: MPEG-1, Layer II, 16bit, 48khz stereo 224kbs
Multiplexing: MPEG2
Bitrate type: Constant
Mux rate: 0kbps
Packet size: 2,048 bytes
Packets/Pack: 1
Video buffer size: 0kb
Audio buffer size: 4kb

If anyone out there has experience with making files that "just work" for Duets, I'm all ears!

Thanks in advance for any help you can give us.


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Chris Heuer
Re: Encoding PPro projects for Adtec Duet units?
on Mar 19, 2012 at 8:32:56 pm

Hello. Have you found a solution for this issue? I am working with adtec gear (Duets & DPI's) and have both working with Premiere CS5.5. Let me know if you still need help!

Chris

Chris Heuer
Freefall FX, LLC


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Jake Hallman
Re: Encoding PPro projects for Adtec Duet units?
on Mar 19, 2012 at 9:48:15 pm

We never found a solution that worked 100 percent of the time, so they went back to the old-school method.

If you've found a workflow that allows for dropping them straight in, I'd love to hear about it!


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Chris Heuer
Re: Encoding PPro projects for Adtec Duet units?
on Mar 21, 2012 at 5:24:30 pm

OK. What finally worked for me:

In Premiere, go to file>export.
Under "Format" (The top drop down) select MPEG 2
Make sure Export Audio and Video are both checked.
Under the Multiplexing tab, select "TS"
Under the Video tab, set "Quality" to 5,
"TV Standard" to NTSC
"Frame Width" to 720
"Frame Height" to 480
"Frame Rate" to 29.97
"Field Order" to Lower
"Pixel Aspect Ratio" to Standard 4:3
Both "Profile and Level" to Main

Further down, under "Bitrate Settings" choose CBR
and set the Bitrate[Mbps] to 4

Leave the rest of the Video settings as they are. Go to the Audio tab.

Under Audio Format Settings, select MPEG
Under Basic Audio Settings, select MPEG-1, Layer II Audio
Audio Mode: Stereo
Frequency: 48kHz
Bitrate: 224



That's what is working here. Let me know if you have audio or video drop outs or failures!


C

Chris Heuer
Freefall FX, LLC


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Jake Hallman
Re: Encoding PPro projects for Adtec Duet units?
on Mar 21, 2012 at 5:31:34 pm

Thanks! I'll give it a shot. Looking at your settings, my only concern is the field order - according to the manuals, some of the older units can only handle stuff that's interlaced upper first.

That being said, I'm eager for anything that'll get my stuff away from Beta tape. Well, that, and incidentally looking a heckuva lot better on-screen than any of my local competitors...


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