Discussion:
Sursound Digest, Vol 111, Issue 18
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Ben Eyes
2017-10-24 16:53:15 UTC
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Hi Oli ! I read something online about this I will try and dig it up.

Ben
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1. ambisonics + video (Oliver Larkin)
2. Re: ambisonics + video (umashankar manthravadi)
3. Re: ambisonics + video (Marc Lavall?e)
4. Re: ambisonics + video (Marc Lavall?e)
5. getting the peak frequency from microphone input
(=?gb18030?B?wdikzg==?=)
----------------------------------------------------------------------
Message: 1
Date: Tue, 24 Oct 2017 12:03:02 +0100
Subject: [Sursound] ambisonics + video
Content-Type: text/plain; charset=utf-8
Hi All,
Is anyone is aware of a good resource that will help me learn about muxing
video with ambisonic audio? I don?t have much experience with audio for
video full stop and I am confused about what is possible with different
codecs. I haven?t been able to find comprehensive info online. I would like
to know what video formats/containers for both audio and video i can use to
distribute video + HOA audio (although knowing about what?s possible for
FOA audio would also be great). Web based playback is what this is really
for, but I would also like to know about high quality options for
downloads, since VLC 3 does TOA. Not sure if this will allow a custom
decoder or if it?s just for binaural.
Sorry for a bit of an open ended question, but if anyone has any tips i?d
really appreciate it.
Thanks!
Oli
------------------------------
Message: 2
Date: Tue, 24 Oct 2017 11:37:09 +0000
Subject: Re: [Sursound] ambisonics + video
namprd10.prod.outlook.com>
Content-Type: text/plain; charset="windows-1252"
Try this FB group. You will get lots of help. https://www.facebook.com/
groups/SpatialAudioVRARMR/
umashankar
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
Windows 10
Sent: Tuesday, October 24, 2017 4:33 PM
Subject: [Sursound] ambisonics + video
Hi All,
Is anyone is aware of a good resource that will help me learn about muxing
video with ambisonic audio? I don?t have much experience with audio for
video full stop and I am confused about what is possible with different
codecs. I haven?t been able to find comprehensive info online. I would like
to know what video formats/containers for both audio and video i can use to
distribute video + HOA audio (although knowing about what?s possible for
FOA audio would also be great). Web based playback is what this is really
for, but I would also like to know about high quality options for
downloads, since VLC 3 does TOA. Not sure if this will allow a custom
decoder or if it?s just for binaural.
Sorry for a bit of an open ended question, but if anyone has any tips i?d
really appreciate it.
Thanks!
Oli
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https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here,
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Message: 3
Date: Tue, 24 Oct 2017 08:30:54 -0400
Subject: Re: [Sursound] ambisonics + video
Content-Type: text/plain; charset=UTF-8
Hi Oliver.
To my knowledge there's nothing special about muxing more than 2
channels of audio with a video stream. Once a video file and a
multi-channel audio file are ready to mux, FFmpeg can do it (MP4Box
is also useful for MP4 streams). About mixing codecs: there's cases
where the MKV container is required; for example, H-264 + Opus, but I
could be wrong. What I found difficult (3 years ago) was to prepare and
render multi-channel audio streams and save them in the AMB format, but
now I suppose there's more options.
I did not know about VLC3 and its ambisonics support.
https://twitter.com/m4gsoft/status/890127816842465280
https://github.com/google/spatial-media
I guess that the produced files can also be decoded to speaker arrays.
P.S.2: I'd be trilled to consult the FB page that Umashankar suggested,
but it requires a login and I'll never get a FB account. So any useful
info found on FB should be forwarded to non-big-brothered repositories.
--
Marc
Le Tue, 24 Oct 2017 12:03:02 +0100
Hi All,
Is anyone is aware of a good resource that will help me learn about
muxing video with ambisonic audio? I don?t have much experience with
audio for video full stop and I am confused about what is possible
with different codecs. I haven?t been able to find comprehensive info
online. I would like to know what video formats/containers for both
audio and video i can use to distribute video + HOA audio (although
knowing about what?s possible for FOA audio would also be great). Web
based playback is what this is really for, but I would also like to
know about high quality options for downloads, since VLC 3 does TOA.
Not sure if this will allow a custom decoder or if it?s just for
binaural.
Sorry for a bit of an open ended question, but if anyone has any tips
i?d really appreciate it.
Thanks!
Oli
_______________________________________________
Sursound mailing list
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
here, edit account or options, view archives and so on.
------------------------------
Message: 4
Date: Tue, 24 Oct 2017 08:48:41 -0400
Subject: Re: [Sursound] ambisonics + video
Content-Type: text/plain; charset=UTF-8
FB also have their own specs, and some info can be found here
https://facebookincubator.github.io/facebook-360-spatial-workstation/
--
Marc
Hi Oliver.
To my knowledge there's nothing special about muxing more than 2
channels of audio with a video stream. Once a video file and a
multi-channel audio file are ready to mux, FFmpeg can do it (MP4Box
is also useful for MP4 streams). About mixing codecs: there's cases
where the MKV container is required; for example, H-264 + Opus, but I
could be wrong. What I found difficult (3 years ago) was to prepare
and render multi-channel audio streams and save them in the AMB
format, but now I suppose there's more options.
I did not know about VLC3 and its ambisonics support.
https://twitter.com/m4gsoft/status/890127816842465280
https://github.com/google/spatial-media
I guess that the produced files can also be decoded to speaker arrays.
P.S.2: I'd be trilled to consult the FB page that Umashankar
suggested, but it requires a login and I'll never get a FB account.
So any useful info found on FB should be forwarded to
non-big-brothered repositories. --
Marc
Le Tue, 24 Oct 2017 12:03:02 +0100
Hi All,
Is anyone is aware of a good resource that will help me learn about
muxing video with ambisonic audio? I don?t have much experience with
audio for video full stop and I am confused about what is possible
with different codecs. I haven?t been able to find comprehensive
info online. I would like to know what video formats/containers for
both audio and video i can use to distribute video + HOA audio
(although knowing about what?s possible for FOA audio would also be
great). Web based playback is what this is really for, but I would
also like to know about high quality options for downloads, since
VLC 3 does TOA. Not sure if this will allow a custom decoder or if
it?s just for binaural.
Sorry for a bit of an open ended question, but if anyone has any
tips i?d really appreciate it.
Thanks!
Oli
_______________________________________________
Sursound mailing list
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
here, edit account or options, view archives and so on.
_______________________________________________
Sursound mailing list
https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe
here, edit account or options, view archives and so on.
------------------------------
Message: 5
Date: Tue, 24 Oct 2017 23:28:29 +0800
Subject: [Sursound] getting the peak frequency from microphone input
Content-Type: text/plain; charset="gb18030"
Dear all,
There must be some easy way to do this that I'm overlooking: I want to
scan the audio from a microphone input and get the peak frequency. I know
how to use myriad of spectral analysis software and the spectroscope
object, but I don't see an obvious way to display the frequency with the
greatest amplitude in Max/msp. Seems like a trivial task. I must be going
about this the wrong way.
Looking forward to your reply,
All the best,
YL
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Ben Eyes
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