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Conversion to avoid no rendering

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Goutom Ain
Conversion to avoid no rendering
on Aug 13, 2013 at 1:10:13 pm

Hello Everyone,

I am converting some wmv video to apple prores hq using ffmpeg so that i can use those file directly in fcp without rendering. But i am in confusion which audio codec to use? I tried using alac codec but later i saw that fcp ask us to avoid alac codec.

ffmpeg -i input.wmv -vcodec prores -profile:v 3 -acodec alac output.mov


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Dave LaRonde
Re: Conversion to avoid no rendering
on Aug 13, 2013 at 4:35:54 pm

A Quicktime movie in the ProRes 422 codec. That's what you make.

Actually, any one of the ProRes family of codecs ought to do the trick. 4444 and HQ will be overkill, and proxy probably won't be good enough.

You can't go wrong with ProRes 422. If it doesn't work, you've got other problems.

Dave LaRonde
Former Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Shane Ross
Re: Conversion to avoid no rendering
on Aug 13, 2013 at 4:58:58 pm

PCM audio. 48kHz, 16bit Stereo. And yes, ProRes 422...not HQ. Just because it sounds better doesn't mean it is. For the videos you are converting, it's a waste of space.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Goutom Ain
Re: Conversion to avoid no rendering
on Aug 15, 2013 at 5:09:06 am

Hi,

I am using ProRes422 (Normal) and PCM Audio little Endian 16 bit and 48 khz using ffmpeg. But still when i keep the video in timeline, it shows a Green line and audio is just perfect. But when converted using mpeg streamclip it works just fine in the same sequence.


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Michael Gissing
Re: Conversion to avoid no rendering
on Aug 15, 2013 at 5:35:45 am

Sometimes there is an attribute that is not set correctly. If you have Prores and the audio specs are correct then highlight the clip, select remove attributes and select basic motion and distort. This often resets attributes and the green render line disappears.


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dick avery
Re: Conversion to avoid no rendering
on Aug 16, 2013 at 2:35:51 pm

Hello, you can read about prores conversion (hq or not) using ffmpeg here:
https://trac.ffmpeg.org/wiki/vfxEncodingGuide


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