YouTube Audio problem

Re: YouTube Audio problem

affter333 — Fri, 22 May 2015 16:17:45 +0000

yea I'm still on XP and my ffmpeg is pretty old too, need to update..
Thanks from taiwan..

Re: YouTube Audio problem

affter333 — Fri, 22 May 2015 16:15:09 +0000

tong2shot Wrote:
-------------------------------------------------------
> As stated in mediainfo (by me and TVjunkie) it's
> AAC and stereo, but the left channel is completely
> flat.
>
> Here is the waveform from audacity (sound editor)
> :
> [s15.postimg.org]
>
> So I think your video player and sound editor need
> to be updated :-)

ok, thanks , my goldwave is like 5 years old, need to updated..

Re: YouTube Audio problem

TVjunkie — Mon, 18 May 2015 17:16:15 +0000

affter333 wrote:
-------------------------------------------------------
> so maybe 480p is AC3 or something
> that's not just 2 channel stereo ???

This is definitely NOT the case.
This is still AAC LC @128kbpsABR, SR=44.1kHz, ac=2 (stereo)
MediaInfo would have shown it if it was otherwise -
I have several files with AC3 encoding (AVI, MP4 but mainly MKV)
and MediaInfo always detects correctly the audio stream...

The following ffmpeg command extracts losslessy the audio stream
from your "dropbox" video file:

ffmpeg -i foo.mp4 -vn -c:a copy -f adts audio.aac

"foo.mp4" is your renamed file, for ease of use...
I have attached the ffmpeg extraction log,
where you can also see it reporting that:

Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s

The raw audio stream is then loaded fine on the lossless MP3/AAC
audio editor mp3DirectCut v2.20
See attached screenshot...

> but strange enough, the 360p version does have
> sound on my system, but not 480p ,

From your "youtube settings.jpg" screenshot I
can tell you are (still) on Windows XP and you
are using some codec pack (possibly K-Lite)
which contains ffdshow & MPC-HC - has this been
updated to a recent version?
Maybe you need to fine tune it better (via Codec
Tweak Tool?) - perhaps change the MP4 splitter
to Haali?

> but the 480p is complete blank, it seems that
> even goldwave can't get the audio from 480p.

In any case, as you know, the 360p file downloads
as a standalone MP4 one, while the 480p downloads
as individual dash streams that - according to user
setting - get muxed to MP4 via the internal, java based,
multiplexer. The devs themselves have said that this
is not the optimal solution, but works in 99.9% of cases.
Maybe your Goldwave editor (a payware I haven't tried)
doesn't like something in the MP4 headers of this
particular file - hard to tell...
FRD itself is a downloader, not a fully featured AV suite.
It creates FLV/MP4/TS files that usually work in decent
players for viewing and this is enough...
For further editing/manipulation of those files,
you are free to use the software of your choice...

If the MP4 container created by FRD doesn't
work well in Goldwave (and you must use this one),
I would suggest you demux both streams to raw ones
(you can use ffmpeg:
Video stream:
ffmpeg -i foo.mp4 -an -c:v copy -bsf:v h264_mp4toannexb -f h264 videoES.h264
Audio stream:
ffmpeg -i foo.mp4 -vn -c:a copy -f adts audioES.aac)
and then mux again to MP4 (or MKV) container
via another multiplexer - I personally use MP4Box,
but ffmpeg is simpler:
ffmpeg -i videoES.h264 -i audioES.aac -c copy -bsf:a aac_adtstoasc -f mp4 foo-remuxed.mp4).
If this new file doesn't work still, maybe contact
Goldwave, if a registered user...
I am putting this to rest now; so should you...

Regards to China?

Re: YouTube Audio problem

tong2shot — Mon, 18 May 2015 15:50:16 +0000

As stated in mediainfo (by me and TVjunkie) it's AAC and stereo, but the left channel is completely flat.

Here is the waveform from audacity (sound editor) :

So I think your video player and sound editor need to be updated :-)

Re: YouTube Audio problem

affter333 — Mon, 18 May 2015 03:32:40 +0000

TVjunkie Wrote:
-------------------------------------------------------
> affter333 wrote:
> --------------------------------------------------
> -----
> > 480p direct download from my dropbox
>
> Hello ;-)
>
> Just downloaded and unrared -
> your file DOES HAVE an audio stream
> inside the MP4 container!
> I am on Windows Vista SP2 x86 and
> by probing your file with MediaInfo
> you can see for yourself in the attached log.
>
> If you play back the file with Quicktime
> (for Windows) v7.7.6 (latest), it is indeed true
> that no audio is reproduced.
> But if you play back the file in any decent MP4
> player (VLC 2.2.1 / MPC-HC 1.7.8 / MPC-BE 1.4.4
> and others) you do get audio BUT ONLY FROM
> THE RIGHT CHANNEL, as I have posted previously.
> The original file uploaded on youtube must've
> been
> faulty, since the same audio behaviour is
> exhibited
> on the youtube page itself...
>
> AFAICT, there's nothing wrong with the FRD youtube
> plugin.
> For your convenience, I demuxed the audio
> stream from the MP4 file with FFmpeg (it's a raw
> ADTS file with .aac extension), and then, using
> again FFmpeg,
> I have transcoded it to a mono MP3 file, which I
> attached.
> (NB: I have edited out the silent parts in the
> start & end,
> to reduce file size...).
> Enjoy your chant!
>
> Regards

Hi:

Thanks for the info, it's very help
looks like it's a player issue,

but strange enough, the 360p version does have sound
on my system, but not 480p ,

and when I loaded both clips into goldwave (sound editor) ,
the 360p has waveform only on right channel.
but the 480p is complete blank, it seems that even
goldwave can't get the audio from 480p.

so maybe 480p is AC3 or something that's not just 2 channel stereo ???

Re: YouTube Audio problem

TVjunkie — Mon, 18 May 2015 02:54:19 +0000

affter333 wrote:
-------------------------------------------------------
> 480p direct download from my dropbox

Hello ;-)

Just downloaded and unrared -
your file DOES HAVE an audio stream
inside the MP4 container!
I am on Windows Vista SP2 x86 and
by probing your file with MediaInfo
you can see for yourself in the attached log.

If you play back the file with Quicktime
(for Windows) v7.7.6 (latest), it is indeed true
that no audio is reproduced.
But if you play back the file in any decent MP4
player (VLC 2.2.1 / MPC-HC 1.7.8 / MPC-BE 1.4.4
and others) you do get audio BUT ONLY FROM
THE RIGHT CHANNEL, as I have posted previously.
The original file uploaded on youtube must've been
faulty, since the same audio behaviour is exhibited
on the youtube page itself...

AFAICT, there's nothing wrong with the FRD youtube plugin.
For your convenience, I demuxed the audio
stream from the MP4 file with FFmpeg (it's a raw
ADTS file with .aac extension), and then, using again FFmpeg,
I have transcoded it to a mono MP3 file, which I attached.
(NB: I have edited out the silent parts in the start & end,
to reduce file size...).
Enjoy your chant!

Regards

Re: YouTube Audio problem

affter333 — Sun, 17 May 2015 22:37:21 +0000

Hi:

480p direct download from my dropbox

[dl.dropboxusercontent.com]

Re: YouTube Audio problem

TVjunkie — Sat, 16 May 2015 13:56:13 +0000

tong2shot wrote:
-------------------------------------------------------
> Yes, I can hear the sound.

One oddity with this particular video,
both on the youtube on-line player
or when playing back the downloaded
clip (with FRD - or other downloader)
in a software player is that it appears
THERE'S (practically) ONLY SOUND
ON THE RIGHT AUDIO CHANNEL. :S
I do have my laptop connected to a
Hi-Fi System and this is easily perceived...
No clue if this audio peculiarity has
anything to do with OP's issue...8-)

Regards

Re: YouTube Audio problem

ntoskrnl — Sat, 16 May 2015 11:05:47 +0000

Also, what do your YT plugin settings look like?

Re: YouTube Audio problem

tong2shot — Sat, 16 May 2015 11:00:42 +0000

Yes, I can hear the sound.

Yes, please upload it.

Here is mine : [drive.google.com]

Have you tried to download it again? Maybe it's temporary problem.

Re: YouTube Audio problem

affter333 — Sat, 16 May 2015 05:23:57 +0000

can you actually hear the voice on 480p vid ?

I loaded it into goldwave (sound editor),

the audio track is completely blank , no wave form at all..

I can upload the video to dropbox if you want to take a look at it..

Re: YouTube Audio problem

tong2shot — Thu, 14 May 2015 23:02:07 +0000

Works fine for me, tested with VLC and SMPlayer. Here's the media info, I can't paste it here because the forum code can't handle some character sets.

Anything in the log?

YouTube Audio problem

affter333 — Thu, 14 May 2015 19:30:01 +0000

Hi

when I downloaded the video below

[www.youtube.com]

the 360p version has sound

the 480p vid is completely silent. (maybe remux issue ?)

thanks..