OT: jack_iodelay outside jack
Matt Keys <[email protected]> Mon, 28 Jun 2021 01:09:33 +0000
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Hi All,
I've asked in other forums without success. I'm hoping this community (mayb=
e Paul?) can point me in the right direction. It's intellectual curiosity a=
nd not business related.
I'm trying to understand which is better for tx/rx of highest quality and l=
owest latency audio to multple remote peers - uncompressed audio (for examp=
le jacktrrip 2 channel 48k / 128 frames), or something like opus at 48k 2 c=
hannel (for example webrtc using opus)? Granted webrtc opus is typically mo=
no but there are sip clients like baresip which can use opus at 2 channel s=
tereo at 48k. Am I completely wrong in thinking that the two are nearly ide=
ntical as far as quality? My focus is within a controlled environment like =
a flat wired or optical 1g or 10g ethernet.
Does the use of opus (and a sip stack/webrtc) add latency overall, or are t=
here efficiency gains (for example network bandwidth reduction) through its=
use?
Could this difference, if any, be measured using jack_iodelay? I was thinki=
ng about running jack_iodelay through a loop between jacktrip p2p vs baresi=
p+jack+opus at 48k stereo p2p with a loopback cable.
Thanks,
Matt
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Hi All,</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
I've asked in other forums without success. I'm hoping this community (mayb=
e Paul?) can point me in the right direction. It's intellectual curiosity a=
nd not business related.<span id=3D"��"></span></div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-siz=
e: 12pt;"><br>
</span></div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-siz=
e: 12pt;">I'm trying to understand which is better for tx/rx of highest qua=
lity and lowest latency audio to multple remote peers - uncompressed audio =
(for example jacktrrip 2 channel 48k
/ 128 frames), or something like opus at 48k 2 channel (for example webrtc=
using opus)? Granted webrtc opus is typically mono but there are sip clien=
ts like baresip which can use opus at 2 channel stereo at 48k. Am I complet=
ely wrong in thinking that the two
are nearly identical as far as quality? My focus is within a controlled en=
vironment like a flat wired or optical 1g or 10g ethernet.</span></div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-siz=
e: 12pt;">Does the use of opus (and a sip stack/webrtc) add latency overall=
, or are there efficiency gains (for example network bandwidth reduction) t=
hrough its use?</span></div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
Could this difference, if any, be measured using jack_iodelay? I was thinki=
ng about running jack_iodelay through a loop between jacktrip p2p vs baresi=
p+jack+opus at 48k stereo p2p with a loopback cable.</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<span style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-siz=
e: 12pt;">Thanks,</span><br>
</div>
<div style=3D"font-family: Calibri, Arial, Helvetica, sans-serif; font-size=
: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
Matt</div>
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