Blackmagic Forum

Posted: **Wed Jul 13, 2016 7:49 pm**

Hi I have Resolve 12.5 on my windows 10, I want to export video for youtube, but there isnt AAC codec option. So I exported as PCM codec and when imported to youtube the audio is worst than bad

How could I anable AAC codec option or change codec. I chose H.264 video codec but when I go to audio window there is no AAC codec, only PCM. Even if I chose any other video codecs there is still one option for audio, that is PCM. I also tried Youtube export setings, nothing helped me, I wondering is this is because Im not using Davinci Resolve Studio or what. Maybe other thoughts? Thanks for any info.

Posted: **Thu Jul 14, 2016 7:37 pm**

Domantas Plunge wrote:Hi I have Resolve 12.5 on my windows 10, I want to export video for youtube, but there isnt AAC codec option. So I exported as PCM codec and when imported to youtube the audio is worst than bad How could I anable AAC codec option or change codec. I chose H.264 video codec but when I go to audio window there is no AAC codec, only PCM. Even if I chose any other video codecs there is still one option for audio, that is PCM. I also tried Youtube export setings, nothing helped me, I wondering is this is because Im not using Davinci Resolve Studio or what. Maybe other thoughts? Thanks for any info.

Same problem here. Very annoying thing. This is not a problem using Resolve in Mac. I don't know why there's no AAC codec in Windows version.

Posted: **Thu Jul 14, 2016 10:05 pm**

AAC is not going to solve your problem.
PCM is about the best what you can send to youtube. Youtube will re-encode your video and audio to your beloved AAC. This is why you want to send good audio source and PCM is very valid choice and some low bitrate AAC is not a good choice at all. Even high bitrate AAC is still worse than PCM.
If you think your audio is poor quality on youtube than not much what you can do about it as it's all under youtube control. They use quite low bitrates for video and audio and user has 0 control over it.

Posted: **Fri Jul 15, 2016 6:29 am**

Andrew Kolakowski wrote:AAC is not going to solve your problem.
PCM is about the best what you can send to youtube. Youtube will re-encode your video and audio to your beloved AAC. This is why you want to send good audio source and PCM is very valid choice and some low bitrate AAC is not a good choice at all. Even high bitrate AAC is still worse than PCM.
If you think your audio is poor quality on youtube than not much what you can do about it as it's all under youtube control. They use quite low bitrates for video and audio and user has 0 control over it.

But Youtube says AAC is recommended right here: https://support.google.com/youtube/answer/1722171?hl=en

Also I have bought track straight from itunes - so quality should be max.
What if I export at a higher bit depth, for example instead of 16 as 24 or 32? Will this change anything?
When I put it on Youtube the bass is so loud that you only hear it, but when minimise the bass in your computer or equalizer the video audio plays nice, but just aint cool

Posted: **Fri Jul 15, 2016 4:44 pm**

Andrew Kolakowski wrote:AAC is not going to solve your problem.
PCM is about the best what you can send to youtube. Youtube will re-encode your video and audio to your beloved AAC. This is why you want to send good audio source and PCM is very valid choice and some low bitrate AAC is not a good choice at all. Even high bitrate AAC is still worse than PCM.
If you think your audio is poor quality on youtube than not much what you can do about it as it's all under youtube control. They use quite low bitrates for video and audio and user has 0 control over it.

That's not the point. If I want to deliver a lightweight file, i won't export with an uncompressed audio format.

And why is it possible on Mac and not Windows? :?:

Posted: **Fri Jul 15, 2016 5:38 pm**

If you're restricted by size or internet speed then export ProRes/DNxHD master and encode mp4 with eg. Handbrake, ffmpeg etc (app based on x264 code). Resolve h264 encoder is average, so low bitrate will make file already "damaged". Add youtube re-compression you will end up with not the best end result.
As far as I know Mac provides AAC encoding engine in OSX, so this can be used easily. On PC BM has to most likely license some AAC encoder and integrate it to Resolve (more work and costs). AAC is not a free standard.

I would advise to use correct tool for a specific job, not all-in-one tool as these are always full of compromises.

Posted: **Fri Jul 15, 2016 5:52 pm**

Domantas Plunge wrote:
Andrew Kolakowski wrote:AAC is not going to solve your problem.
PCM is about the best what you can send to youtube. Youtube will re-encode your video and audio to your beloved AAC. This is why you want to send good audio source and PCM is very valid choice and some low bitrate AAC is not a good choice at all. Even high bitrate AAC is still worse than PCM.
If you think your audio is poor quality on youtube than not much what you can do about it as it's all under youtube control. They use quite low bitrates for video and audio and user has 0 control over it.

But Youtube says AAC is recommended right here: https://support.google.com/youtube/answer/1722171?hl=en

Also I have bought track straight from itunes - so quality should be max.
What if I export at a higher bit depth, for example instead of 16 as 24 or 32? Will this change anything?
When I put it on Youtube the bass is so loud that you only hear it, but when minimise the bass in your computer or equalizer the video audio plays nice, but just aint cool

Youtube wants you to use AAC to reduce their bandwidth requirements and costs. They don't care about quality, but their business.

If you have source audio in some form than sending it to youtube as PCM is the best what you could do to preserve as much quality as possible. Changing bit depth won't help at all. 16bit is enough.

Your problem is strange- youtube shouldn't boost bass. The first thing which AAC "destroys" are rather high frequencies. Maybe your problem is they way how your signal is played when it comes from browser opposite to e.g. iTunes.

Posted: **Mon Feb 22, 2021 8:37 pm**

I've got same issue... Why I can't set on aac audio codec a bit rate over 192 kbps?

Posted: **Mon Feb 22, 2021 11:36 pm**

I think it'a Windows issue as there is no limitation on Mac.

Posted: **Tue Feb 23, 2021 7:03 am**

Peter Cave wrote:I think it'a Windows issue as there is no limitation on Mac.

Interesting to know...

Posted: **Tue Feb 23, 2021 8:37 am**

On the Mac, it's limited to 320 Kb/s.

Posted: **Tue Feb 23, 2021 4:28 pm**

Ale_Zakko wrote:Why I can't set on aac audio codec a bit rate over 192 kbps?

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