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Transcoding screws up .mov audio
Hey ya’ll,
So I’m doing some casting editing, and all the footage I’m sent are .mov files captured in Quicktime. They are large so I went to the AMA / transcode workflow I’ve been reading so much about.But when I do this, the audio on the resulting media slides WAY out of synch, more and more as the clip goes on.
What’s the deal with this? Is there a fix or is this function really just for DNxHD stuff?
Indeed this is not a life or death matter, whenever you get a chance
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7 Replies
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[Ryan Tiedgen] “all the footage I’m sent are .mov files captured in Quicktime.”
Captured HOW? And to what codec? what dimensions?
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
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I’m unsure about the camera, but the original file is a Quicktime movie (720×480, H.264 and AAC codecs, Color Profile: SD (6-1-6), 2 audio channels)
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DNxHD is for HD formats. That’s an SD format. Gotta transcode to an SD codec.
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
Read my blog, Little Frog in High Def -
I’m not doing anything with DNxHD now though, I was just referencing it, sorry if that was confusing.
It’s a 16×9 project, 30i NTSC
When I link to AMA files, would transcoding to SD be in the Target Video Resolution drop down then? 1:1? I have been choosing DV 411 MXF, thinking that was for sure what I wanted.
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When you transcode you could go to any video format you like – I’d suggest at least DV50 over DV25 411 – and uncompressed (1:1) would create huge files, but wouldn’t add any additional compression.
Since you’re starting with highly compressed SD files (h264) you might not want to add any further compression.
Best,
Jeff G
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Ok, I can try to do that at some point, but the fact remains that when I transcode media that I have linked through AMA, the resulting clips have severely drifting audio unlike the in-synch originals.
Is there anyone else having this problem?
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I’m curious – is it a frame rate match? For example are you transcoding 24p material in a 30i timeline?
Best,
Jeff G
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