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[Clothem]

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[ChapmanDolly]

If you upload material that has been recorded and mixed at proper levels the normalization will not kick in, ie. not having the meters glued to 0 dbfs! It only affects audio that is way too loud.

[Clothem]

If you upload material that has been recorded and mixed at proper levels the normalization will not kick in, ie. not having the meters glued to 0 dbfs! It only affects audio that is way too loud.

my audio is a music 16bit/44.1 from a CD

so you mean i've to normalized it myself before upload to youtube ?

But wav normalization is not lossless.. right?

[ChapmanDolly]

No, I'm not talking about normalization at all. Youtube has a standardized level. If your track is louder than this the loudness normalization will be applied to reduce the volume to their standard. If it is quieter nothing will be done to the track. If you right click on a video in YT and select Stats for Nerds you will see whats happening.
Have a read of this article.

http://productionadvice.co.uk/stats-for-nerds/


And normalization is lossless.

[Clothem]

No, I'm not talking about normalization at all. Youtube has a standardized level. If your track is louder than this the loudness normalization will be applied to reduce the volume to their standard. If it is quieter nothing will be done to the track. If you right click on a video in YT and select Stats for Nerds you will see whats happening.
Have a read of this article.

http://productionadvice.co.uk/stats-for-nerds/


And normalization is lossless.

i searched on google and everyone say normalization = "audio destruction"

proof :

https://hydrogenaud.io/index.php/topic,85573.0.html
https://hydrogenaud.io/index.php/topic,42608.0.html
https://forum.audacityteam.org/viewtopic.php?t=80089

[manono]

If you don't want your audio normalized by YouTube then either lower the loud parts or lower everything. What's so hard about that?

Just because the music is from a CD means nothing as CDs are often mixed improperly. Audio engineers these days seem to think louder means better and sometimes even purposely clip the music.

[Clothem]

the problem is not really the volume normalization
but youtube only encode aac so i try to get the best quality with aac

[ChapmanDolly]

Like EQ, compression, and limiting, etc, it is a tool which if applied properly does not equal destruction. I say this as a professional sound engineer with over 40 years experience. As I said before this has nothing to do with normalization. If you upload audio at proper levels nothing will be done to the track except the usual YT re-encoding which they do to all uploads. It's up to you to upload the highest quality at the correct levels in the first place to mitigate anything YT does..

[MrHorror93700]

YouTube work with AAC, even if you upload PCM or FLAC YouTube will not process it

PCM & FLAC is reserved for Vevo and art-tracks upload (private)

That's why art-tracks are so high in audio quality, unfortunately basic YouTube user can only use AAC 48khz

[ChapmanDolly]

Not so. I upload videos to my channel which have LPCM soundtracks. YT has no problem converting those. They can cope with most video and audio formats.

[MrHorror93700]

You can't use Uncompressed audio, do a upload test if you don't trust me

If the upload goes directly to 95% that mean YouTube didn't processed the video

[ChapmanDolly]

Here you go. a short clip uploaded to YT with 24bit 48k LPCM. https://youtu.be/Y1SXgJJmYgo

[MrHorror93700]

Did you watched the "%" after the upload ?

Yes you can upload it to youtube but the audio is not encoded (result in a worst quality than AAC)

[ChapmanDolly]

No problem with the audio here. This is a camera file hence the audio level. It matches the original exactly.
[Attachment 50726 - Click to enlarge]

[MrHorror93700]

YouTube only encode AAC 48khz audio

You can't use uncompressed audio on YouTube, only with the art-tracks
https://www.youtube.com/watch?v=4D7u5KF7SP8
https://support.google.com/youtube/answer/6039860

[ChapmanDolly]

You can if they are part of a video. I suggest you look at the second link you posted.

[ChapmanDolly]

This is the YT spec Sheet
[Attachment 50727 - Click to enlarge]

[MrHorror93700]

"The features described in this article are available only to partners who use YouTube's Content ID matching system."

(Art-tracks only)

[MrHorror93700]

If the upload goes directly to 95% that mean YouTube didn't processed the video

What i try to tell you is : you can get a better quality on YouTube with AAC 48kHz

[MrHorror93700]

Clothem,

VirtualDub can totally bypass the YouTube normalization

But... VirtualDub work with AVI and YouTube want MP4/AAC

So yes you will bypass the normalization but YouTube will not encode your audio

I've tested this so many times, this trick is not good for YouTube

[manono]

You can't use Uncompressed audio, do a upload test if you don't trust me

I don't trust you. Did you join up here just to spread bad information? I tested what you said and you're wrong. Here's the original video information for the video I uploaded:

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 28 s 153 ms
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Writing library : x264 core 152 r2851M ba24899
Encoding settings : cabac=1 / ref=3 / deblock=1:-1:-1 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Default : Yes
Forced : No
Color range : Limited
Matrix coefficients : BT.470 System B/G

Audio
ID : 2
Format : PCM
Format settings : Little / Signed
Codec ID : A_PCM/INT/LIT
Duration : 28 s 153 ms
Bit rate mode : Constant
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Bit depth : 16 bits
Default : Yes
Forced : No

Then I uploaded it to YouTube with no problem. I then downloaded it so I could get the YouTube information:

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3
Format settings : CABAC / 3 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 28 s 112 ms
Bit rate : 814 kb/s
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Variable
Frame rate : 24.000 FPS
Minimum frame rate : 23.974 FPS
Maximum frame rate : 90 000.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.110
Stream size : 2.73 MiB (86%)
Color range : Limited
Matrix coefficients : BT.470 System B/G
Codec configuration box : avcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 28 s 213 ms
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 441 KiB (14%)
Default : Yes
Alternate group : 1

PCM in the source, AAC in the YouTube version, all processed fine.

YouTube only encode AAC 48khz audio

Wrong again. It's 44.1kHz. They will also encode a version with VP9 video and Opus audio. At the bottom is a Stats For Nerds picture of one of those.

But... VirtualDub work with AVI and YouTube want MP4/AAC

VirtualDub2 can encode for most video and audio codecs and use many different containers.

[Cornucopia]

Yeah, I agree with you guys. MrH is full of it or has some ax to grind or something to shill.
YT is very clear on this, has been for a while. They accept tons of stuff, but audio must be accompanied by video. It is a video site after all.

Scott

[MrHorror93700]

manono

What i try to tell is : you can get a better audio quality on YouTube with AAC 48kHz

[MrHorror93700]

Yeah, I agree with you guys. MrH is full of it or has some ax to grind or something to shill.
YT is very clear on this, has been for a while. They accept tons of stuff, but audio must be accompanied by video. It is a video site after all.

Scott

If the upload goes directly to 95% that mean YouTube didn't processed the audio

YouTube want AAC/MP4

[MrHorror93700]

manono

Sorry i didn't know VirtualDub2 could handle mp4

[Clothem]

:up:

[zizouillette]

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