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Converting a lossless video is trimming pixels off it.

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Martin Pedraza
Converting a lossless video is trimming pixels off it.
on Feb 16, 2016 at 3:39:26 pm

So, a client needs a render to be in a certain format.

More precisely:
XDCAM HD422 1080i60 (50mb/s CBR)
29.97, non drop upper field first

For the workflow we are working in 29.97, and turning in uncompressed movs that are later converted to the hd422 for the turn in.

However, we've found that some pixels are chopped off during conversion, screwing up the format. Quicktime inspector shows me this:

1920x1080 (1888x1062)

What does this mean? What am I missing? Codecs are such a nightmare.


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Tero Ahlfors
Re: Converting a lossless video is trimming pixels off it.
on Feb 16, 2016 at 5:26:07 pm

[Martin Pedraza] "What does this mean?"

It means that the video window in Quicktime is that size. Not that the actual video is that size.


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Martin Pedraza
Re: Converting a lossless video is trimming pixels off it.
on Feb 16, 2016 at 5:31:29 pm

There's a third value that represents that, under "current size", i believe. Here's what I'm seeing:9790_capture.png.zip


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Dave LaRonde
Re: Converting a lossless video is trimming pixels off it.
on Feb 16, 2016 at 6:02:13 pm

You probably double-checked your lossless file to make sure its frame rate was 29.97.
I think you your transcoding software settings are wrong. Your screen shot indicates that the file is at 25 frames per second, which is obviously incorrect, and it would cause missing frames.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Martin Pedraza
Re: Converting a lossless video is trimming pixels off it.
on Feb 16, 2016 at 6:20:43 pm

Yeah, the framerate is wrong on the reference file, that has since been fixed. The resolution is what keeps bugging us.


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Dave LaRonde
Re: Converting a lossless video is trimming pixels off it.
on Feb 16, 2016 at 7:05:12 pm

Now, you HAVE taken this into a different application to double-check frame rate and dimensions, correct?

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Martin Pedraza
Re: Converting a lossless video is trimming pixels off it.
on Feb 17, 2016 at 7:48:51 pm

It seemed production was just using some very old software for conversion. So the problem has changed into a new one! Progress is still progress though.
So instead of making a new thread, I'll just continue in this one for the sake of order, if that's ok.

I think I want to use adobe media encoder for the final render.

My output needs to be:

Timecode: Must be continuous and Non-Drop Frame
Extension: .mov
Codec: XDCAM HD422 1080i60 (50 Mbit/s )
Pixel Aspect Ratio: Square
Audio: STEREO ( do not unlink ) PCM 48Khz, 24 Bits (little-endian)Š Export audio
as channel grouped.
Frame Rate: 29.97 Interlaced
Resolution: 1920x1080, Upper (odd)

*

Sadly, AFAIK, AE can't export that particular audio format, so we are going to go through adobe media encoder, which is a first for me. After looking at some 101 tutorials, I think something is off. I get very few format options on the dropdown menu of the media encoder, compared to what I should be getting if the tutorials are right. I'm uploading some screenshots:

what i should be getting:


what i'm actually getting:


what could the problem be?


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Lisa Bradley
Re: Converting a lossless video is trimming pixels off it.
on Feb 17, 2016 at 9:11:45 pm

Do you have the XDCam plug ins installed??

Lisa Bradley
Editor/Videographer


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Martin Pedraza
Re: Converting a lossless video is trimming pixels off it.
on Feb 18, 2016 at 2:37:23 pm

I'm fairly sure, yes. I can export XDCAM footage no problem from AE.


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Lisa Bradley
Re: Converting a lossless video is trimming pixels off it.
on Feb 18, 2016 at 6:30:00 pm

A work around might be to copy and paste your timeline from Premier to AE and export out of there?

Lisa Bradley
Editor/Videographer


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Gary Milligan
Re: Converting a lossless video is trimming pixels off it.
on Feb 18, 2016 at 5:26:35 pm

I don't have an answer as to why you're not seeing a full list of formats... perhaps you don't have the Apple Pro Video Formats installed. But I am puzzled with the required output settings.

[Martin Pedraza] "Timecode: Must be continuous and Non-Drop Frame"

[Martin Pedraza] "Frame Rate: 29.97 Interlaced"

Seems to be a conflict there.

Gary


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Martin Pedraza
Re: Converting a lossless video is trimming pixels off it.
on Feb 18, 2016 at 6:09:12 pm

I'll look for that and install it, and update, thanks!

The non-drop was my mistake, I was looking at the wrong page of the cheatsheet. The rest still stands.


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Martin Pedraza
Re: Converting a lossless video is trimming pixels off it.
on Feb 18, 2016 at 6:52:50 pm

FWIW, I fixed the missing formats.

Apparently you have to delete a txt file from the contents/resources/txt directory file, then reload the media encoder, and magically it works.

So far so good. Now there's some kerfuffle going on about some jittering and everybody's blaming the fields, but I believe that someone dropped the ball when preparing the raw material to begin with.

So, apparently we're good for the moment. Thank you guys for all the help!


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Walter Soyka
Re: Converting a lossless video is trimming pixels off it.
on Feb 16, 2016 at 6:10:39 pm

[Martin Pedraza] "However, we've found that some pixels are chopped off during conversion, screwing up the format. Quicktime inspector shows me this: 1920x1080 (1888x1062)"

Check out the aperture:
https://support.apple.com/en-us/HT202085

Walter Soyka
Designer & Mad Scientist at Keen Live [link]
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
@keenlive [twitter]   |   RenderBreak [blog]   |   Profile [LinkedIn]


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Marc Nibor
Re: Converting a lossless video is trimming pixels off it.
on Feb 18, 2016 at 4:31:56 pm

Just quickly stopping by.

Maybe THIS > https://mediaarea.net/en/MediaInfo can be of some help along the way to check your footage.

Very helpful! Using it every day.



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