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H264 audio need render?

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d hudson
H264 audio need render?
on Jun 16, 2010 at 1:32:50 pm

H264 issue:
used compressor to transcode all my H264 to proress. In FCP the files work fine cept the audio is always red lined. have tried several settings including pass thru. always red lined.
Working on a 2010 macbook pro with FCP7.


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 2:17:16 pm

Audio needs to be set to PCM 48k 16 or 24 bit.

Are you using Canon footage? Why not download the log and transfer plugin?


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d hudson
Re: H264 audio need render?
on Jun 16, 2010 at 2:54:05 pm

Not cannon: but Flip and JVC

dhudson
sr.editor PVC


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 3:01:23 pm

Got it. Then change the audio settings in compressor to what was mentioned before.

Linear PCM, 48k 16 or 24 bit stereo.


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Mark Petereit
Re: H264 audio need render?
on Jun 16, 2010 at 2:29:23 pm

Convert your audio to AIFF.


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 2:31:53 pm

Convert your audio to AIFF.

which within the compressor dialogue translates to 'Linear PCM'.


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d hudson
Re: H264 audio need render?
on Jun 16, 2010 at 3:16:05 pm

issue seems to be related to the sequence I am tring to put shot into:
seq 1 is DVCPro 720p 60 audio: 48 16b
seq 2 is Prores audio: 48 16b

audio setting are the same yet in seq 1 I get red line for audio and seq 2 all is good is this correct?

dhudson
sr.editor PVC


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 3:51:22 pm

[d hudson] "audio setting are the same yet in seq 1 I get red line for audio and seq 2 all is good is this correct? "

Are you sure the audio is the red render line? Are you making your own timelines or letting FCP conform to your footage?

Look in the browser and scroll to the right to double check your audio format of your footage that you made out of COmpressor.

Jeremy


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d hudson
Re: H264 audio need render?
on Jun 16, 2010 at 3:59:31 pm

If I use the H264 converted footage first and let FCP seq match footage no red line. If I use the P2 footage first and let FCP seq match that the H264 converted footage gets a red line. Now, When I look in browser both clips have the same audio settings ( that I can tell) Aud Rate: 48 K bit rate: 16-bit integer.


dhudson
sr.editor PVC


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 4:03:05 pm

ALright DHudson, I think you aren't quite setting things up properly, but we can help you.

Tell me all the formats that you have in your project, and what timeline you are planning to edit in (frame size, codec, frame rate, etc).

Jeremy


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d hudson
Re: H264 audio need render?
on Jun 16, 2010 at 4:10:24 pm

Main cam and majority of footage is P2 960x720 23.98 used log and tran to import this
FCP matched footage to be DVCPro HD 720p 60 (960 x 720) edit Time base 23.98 audio is 48k 16b

Flip cam is orig 1280 x 720 H264 AAC converted with Compressor to ProRess 422 (lt) various audio have been tried currently set at Linear PCM 16b

dhudson
sr.editor PVC


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 4:12:55 pm

[d hudson] "Flip cam is orig 1280 x 720 H264 AAC converted with Compressor to ProRess 422 (lt) various audio have been tried currently set at Linear PCM 16b "

RIght so the frame rate is what? 30? If so, that's your problem. Your frame rates aren't matching.


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d hudson
Re: H264 audio need render?
on Jun 16, 2010 at 4:20:17 pm

I was starting to think that might be the issue. So FCP would always have to render these few clips because they are at 30 not 23 like the rest of the footage, correct?

dhudson
sr.editor PVC


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 4:24:17 pm

[d hudson] "So FCP would always have to render these few clips because they are at 30 not 23 like the rest of the footage, correct? "

That's right. You can use Compressor to make new 23.976 media from the 720p30 media, or you can use a common denominator, which would be to use a ProRes 720p59.94 1280x720 timeline. You will still need to render, but shouldn't get a red line. Do me a favor, for one of your ProRes clips that you converted, what does the frame rate say in the browser 30 or 29.97?

Jeremy


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d hudson
Re: H264 audio need render?
on Jun 16, 2010 at 4:32:13 pm

Prores clips are 30fps

dhudson
sr.editor PVC


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Jeremy Garchow
Re: H264 audio need render?
on Jun 16, 2010 at 4:36:51 pm

[d hudson] "Prores clips are 30fps "

OK, that will be a problem.

this is what I suggest you do. Remake the ProRes clips, but change the frame rate 29.97 in the vidoe settings tab, and perhaps you should make the clips DVCPro HD instead of ProRes if you are going to be editing in a DVCPro HD timeline anyway

Then in the frame controls tab, at the very bottom there's the Rate Conversion option. Click that option that says 'So source frames play @ 29.97'. This will ever so slightly slow down your footage, but it will be imperceptible, especially on such short clips. This will give you 960x720 DVCPro HD 29.97 clips. Also, make sure to setup the audio like I said before.

Now, setup a DVCPro HD timeline @ 59.94 fps. Like I said, you should still have to render, but it won't be a red line, but rather a green rt line.

Hope that all makes sense. Try one clip as a test.

Jeremy


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d hudson
Re: H264 audio need render?
on Jun 16, 2010 at 5:10:41 pm

yeah that did it, I should have seen the frame rate thing right away but alas...


dhudson
sr.editor PVC


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