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From YouTube: TPAC 2019 WebRTC meeting @Thursday part 2
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C
A
So
just
to
bring
you
up
to
date,
just
basically
you
know
for
video.
We
send
black
just
to
send
the
black.
We
sent
one
black
training
per
second,
the
question
was
hey:
audio
Wesley
should
be
doing
something
similar
Neil's
made
an
argument
against
at
least
it
was
fundamentally
different
than
the
video
is
the
state
issue.
His
recommendation
is
to
send
nothing
regardless
of
wouldn't
even
have
seen
or
VPX
negotiated,
since
they
may
have
adopted
just
said
nothing,
and
so
that's
kind
of
what
we're
discussing
now
is
meals.
You
know
yes,
proposal
is
gonna,
make
sense.
E
A
That
subject
you
know
there
are:
there-
were
lots
of
implementations
that
used
to
you
know
the
whole
issue
of
how
of
sending
nothing
right,
an
RGB
rtcp.
It
was
a
much
bigger
issue
when
you
were
in
bundling
and
doing
MUX,
because
then
you
could
just
go
hey
what
happened
here,
but
you
know,
especially
in
whoever
you
see,
we
have
the
ice
consent
stuff.
It's
not
like
the
net
bindings
won't
go,
get.
A
F
D
D
A
When
the
current
says
this
must
silence
and
I
think
one
of
the
issues
was,
you
know,
depending
on
whether
you
have
seen
a
DDX
negotiated
right.
That
might
mean
comfort.
You
know,
if
you
didn't
have
come
to
know,
then
it
might
mean
nothing
or
you
know,
or
you
have
DTX
like
without
this
or
something
you
know,
GPX
cut.
So
it's
not
like
even
the
guidance
there
isn't
that's
right
now.
It's
not
quite
really
uniform
right.
G
D
A
Well,
it
is
I
mean
the
guy
has
sits.
There
now
applies
to
you
right.
It
says
if
the
track
is
disabled
and
or
muted
on
TV,
seven
months
and
sound.
So
that's
what
it
says
today.
I
think
we're
arguing
about
whether
that
you
know
I
guess.
The
first
question
is
whether
anybody
actually
implemented
that
and
what
results
they
got
and
the
discussion
is
whether
you
did
something
else.
C
F
C
I
B
B
B
In
the
case
of
poverty,
see
whoever
most
tracks
they're,
not
source
will
get
used
media,
so
we
need
to
specify
which
constraints
apply,
and
the
before
me
clarified
that
we
need
to
do
specific
about
this
Chrome
already
shipped
with
high
frame
rate
and
aspect
ratio,
as
you
can
do
the
black
constrains
to
your
road
track
and
that
causes
sound
scaling
and
your
decision
I'm
gonna
soften
make
them
for
them,
especially
trim
was
oh
yeah
I
just
make
a
PR
to
specify
the
constraints.
So
what
are
we
talking
about
it
here?
B
Just
then,
beyond
that
we
got
more.
Maybe
that's
because
it
wasn't
updated,
but
I
got
the
sense
that
there
were
some
perspective
against
adding
more
constraints,
so
proposal
a
is
to
say,
specify
in
WebRTC
PC
that
if
you
do
use
any
of
these
constraints,
then
that
causes
downscaling
or
dropping
frames
and
proposal
B
is
to
say
no,
we
don't
see
any
need
for
constraints
in
the
remote
track
case
and
they
shouldn't
be
specified.
They
shouldn't
do
anything
meaning
from
this
non-compliant
for
shipping.
B
K
B
B
D
K
N
K
M
B
B
B
B
R
S
F
M
Also
because
when
you
lower
the
pitch
range,
that's
the
hardware,
changes,
nose
and
stuff,
and
so
I
would
worry.
If
we
had
in
this
here
that
people
start
asking
why
laughs,
I
love
the
resolution
shouldn't
connection,
then
they
get
differently
or
save
bandwidth
in
it,
because
there
are
implicit
control,
source
of
Education
right.
G
K
In
theory,
it
could
expose
private
information
in
practice.
I
believe
that
it's
exploding,
askin
databases
that
will
probably
already
be
livin
predation.
That
case
notion
and
the
ground
ball
to
so
the
spec
is
saying
when
you
need
to
do
featuring
when
you
go
with
zero,
zero,
zero,
so
I
think
that
aspect
is
basically
baby.
We
do
not
need
any
honest
names.
It's
much
simpler,
no
changes.
K
Address
in
that
case,
and
also
I
find
it
when
spec,
but
returning
zero,
zero
zero
and
the
board
hero
in
one
field
is
very
strange.
Why
not
please
no
and
also
why
we
have
like
just
one
field.
While
you
know
vacancies,
we
have
like
a
dress
and
the
bone
breaking
I.
Don't
we
display
you
just
have
one
implementation,
I,
don't
know
if
you
got
a
potential
issue
or
potential
to
change
that
to
be
more
consistent,
but
these
are
additional
topic.
I
would
like
to
discuss.
A
T
K
F
F
N
F
N
K
J
N
W
B
M
Some
memories
could
be
sent
the
different
processes,
so
the
original
attention
here
seemed
to
be
just
a
while
for
storage
certificate.
You
suggested
we'd.
Basically,
the
sterilization
process
allows
a
boolean
that
tells
you
whether
this
is
for
storage
or
not.
So
it's
very
simple
to
throw
so
we
added
a
PR
basically
throws
is
secure
here.
If
you're
writing
stuff.
M
K
T
P
P
A
Like
so
here's
a
good
example
for
Anna
Peter
will
be
talking
about
this
for
forking
right,
which
you
actually
do.
Is
you
used
the
beat
us
transport
for
the
same
certificate
to
a
different
end
point
now,
it's
it's
on
the
same
webpage
like
you're,
you're,
basically
you're
sending
your
ice
credentials
we're
getting
an
answer
back
and
your
Peter
will
talk
about
this
here.
You'll
be
forking.
Another
ice
transporter
then
creating
a
DTLS
transport.
On
top
of
that,
and
potentially
doing
this.
N
K
K
K
K
N
F
K
M
G
K
P
N
F
N
M
X
N
M
Right
I
just
want
to
say,
come
on
media
capture.
In
the
last
couple
years,
we've
added
a
couple
of
things.
We
had
a
teacher
policy
for
camera
microphone,
something
cryptic
mitigations,
so
we're
using
media
in
the
right
devices.
Now
the
for
encode
focus,
we
made
secure
context
and
everything
we
fixed
some
parts
of
the
key
element:
integration
over
the
load,
algorithm
and.
M
Of
the
latency
constraint
and
with
our
card
scope
of
these
trends
and
specifically
that
all
the
specs
ain't
you
specify
which
one's
the
point
of
their
coming
so
I
think
quite
good
shape,
though
we
don't
know
how
many
issues,
so
we
can
just
jump
in
and
we
have
a
snake
up
different.
That's
one
issue
issue,
sixty
I
think
this
is
the
only
see
are
blocking
issue
over
again.
F
When
I
look
at
it
well,
this
is
a
CA.
Blocker
is
clear.
This
thing
says:
you're
done.
If
the
UA
can
say
that
anything
is
anything
as
a
service
Milas,
and
it
gives
particular
and
definition
of
browser
display,
search
switches,
the
general
form
of
a
single
document
I'm
not
sure
what
that
actually
means.
F
F
F
Q
K
F
The
ain't
me
choose
to
display.
I
N
F
Actually
have
used,
you
may,
because
us
UI
surfaces,
chrome,
just
get
a
week
to
handle
that
case,
because
either
you
don't
you
don't
want
the
many
case.
You
don't
want
that
time
to
switch.
If
you
just
briefly
visit
your
email
and
while
I'm
doing
a
presentation
soon
so
yeah
so
actually
handle
the
banner.
That
said,
you
are
broadcasting
a
notepad.
If
you
want
to
tell
because
this
time
it's
got
cheek
here.
B
But
whatever
you
want
them,
then
we
need
language
like
capture
only
when,
when
the
Spanky
needs
to
clarify
and
recommend
something
about
certain
like
certain
distance,
a
servers
are
more
sensitive
than
understood.
As
long
as
we
know
what
we
need.
It's,
it's
an
editorial
think
terms
of
what
you
have
to
be
in
commence.
It's
just
this
place.
I
don't
make
just
to.
F
K
M
S
M
Yeah,
it
still
think
it's
not
right
to
say
it's
a
definition:
problems
yeah,
Prosser
plunges
practice.
Also,
because
is
a
single
document.
I
think
it's
wrong
to
say
and
because
you're
another
one
said:
if
you
have
two
documents,
that's
to
display
surfaces
and
they're,
not
the
processing
context,
I,
think
I,
think
that
is
the
model,
but
now
I'm
wondering
whether
there's
a
reason
why
it's
saying
a
single
document,
I,
don't
think
anyone
said
mother
at
that
oh
you're,
using
maybe
we
should
have
their.
M
F
F
N
F
K
K
Contacts,
the
replica
has
no
support
of
device
change
events
when
you
do
if
I
change
events
and
you
go
anywhere
devices.
You
end
up
in
to
discovering
subtle
issues
in
respect
and
if
we
have
that
time
ago,
in
what
key
we
have
maybe
testing
a
layout
tests
where
and
internal
areas
where
we
can
other
remote
devices
with
a
very
simple
set
of.
K
K
K
Q
K
B
F
D
Z
K
K
Change
and
you
have
been
drugged
it
at
the
end
of
the
call,
and
he
goes
back
to
sleep
racquetball.
According
the
stack
there
will
be
a
nice
change
and
I
am
on
the
newspaper
and
they
will
be
exactly
the
same
exact
devices
before
and
after
so
it's
useless,
potentially
harmful
I
believe
on
implementation.
Time
doing
it,
but
I
would
like
respect
to
change
slightly,
but
we
would
allow
should
really
walk.
M
K
A
device
change,
but
it's
something
we
should
discuss
our
genes
and
in
our
case,
so
we
have
any
bait.
K
Q
Q
K
N
B
B
K
K
Application
touching
the
camera,
then
the
camera
will
be
reset
and
will
capture
a
low
resolution,
so
either
will
be
foolish
that
yeah
like
to
segment
a
webpage,
so
the
reduction
will
change
dynamically
and
which
is
why
page
is
a
way
of
something
that
it
should
not
be
aware.
All
we
have
seen
it
then
we'll
be
able
to
identify
in
am
scared
with
anyway
inst.
But
it's
not
it's
not
great.
It's
the
great.
We
have
some
education
time.
You
should
I
know
where.
F
Y
B
B
M
M
B
Then
we
don't
change,
I,
think
I.
Think
I
think
this
needs
to
carry
care
and
you
think
it's
a
separate
issue.
Possibly
you
could
add
another
sentence
to
say
that
it's
possible
for
the
camera
resolution
to
change
due
to
other
events,
but
in
terms
of
just
what
does
the
research
mode
are
we
in
agreement?
This
is
five.
F
D
X
K
K
K
K
And
also
when
you
do
get
it
on
yeah
audio
through,
usually
the
expectation
is
that
you
will
take
from
the
nationalist
there's.
Nobody
there
also
I
may
not
even
promised
firing
a
drugs
change,
even
when
my
system
default
change,
which
makes
sense
when
the
Bison
full
permission
is
granted,
because
the
labor
will
will
change,
but
it
does
not
make
sense.
N
N
K
K
K
Q
F
Proposing
it
bigger
change
or
be
it
something
which
is
that
anyway,
divided
with
it,
when
you
call
it
just
media
medium
video
to
all
the
true,
you
should
get
the
first
form
in
the
lists
from
any
high
prices,
which
is
the
requirement
of
the
order
of
things
and
my
devices
I'm.
Just
saying
implementation
on
during.
F
K
M
S
W
E
B
All
right,
all
right,
so
you're
recording.
So
if
you
are
recording
a
track,
worksheet
right
and
when
s
and
some
happening
is
he
could
track
kissed
you
that's
what
my
QC
does
natalie
is
the
recorder
and
think
of
it
again.
So
two
questions:
can
we
avoid
the
costly
recoding
and
question?
Can
we
come
on?
Can
we
get
a
get
dumb?
The
the
door
become
the
street,
which
I
guess
is
the
question.
D
B
K
A
K
B
B
There
is
a
difference.
It
is
useful
to
performance.
Is
this
a
nice
thing
to
have
it's
also
useful
and
team
on
offense?
If
Q
is
possible
with
Saturn
ad
I
can
get
so
so
my
proposal
is
to
Satan
and
if
you
specify
the
correct
amount
foot,
then
you
get
the
reading
come
even
if
it
was
the
same,
but
it
is,
if
you
don't
specify,
which
means
the
user
agent
isn't
allowed
to
pick
the
encoder,
the
Headley,
you
saying
it
must
pick.
You
know,
there's
no
of
it
covered
Wow
we
don't
even
envision
is
yeah.
N
N
X
D
B
B
N
Q
P
B
K
F
B
T
F
B
R
B
Media
recorded
recording
and
you
modify
the
system
like
tracks
of
the
speedy
recording,
Venetian,
stop
recording.
So
I've
made
a
proposal
to
say
and
as
promised
just
promise
you
today
stream
and
it
raises
a
stream
required.
It
requires
the
same
number
of
audio
tracks
of
the
did
for
an
after.
This
may
be
due
to
I.
Think
the
spec,
it's
very
clear
about
what
you
do.
If
you
have
multiple
tracks,
nobody
know,
but
it's
framed
in
terms
of
streets
I'm,
going
to
spoon.
The
recent
I
had
promised
here,
because
the
recording
is
a
asynchronous.
B
Because
because
we
have
language,
saying
thank
you,
if
you
Emily's
the
screen
being
recorded,
then
you
must,
you
know
fire
an
event
or
stop
recording
and
something
like
that
stuff
that
I
gave
with
the
promises
that
you
can.
You
know
that's
when
the
old
stream
is
no
longer
used,
which
means
that
in
essence,
this
promise
of
the
engine
and
the
old
stream.
So
then
the
point
in
the
point
with
being
able
to
loop
a
success.
M
Though
I
think
you
have
to
at
least
follow
and
think
about
what
happens
if
there
are
two
video
tracks
or
maybe
more
likely,
one
video
track
in
multiple
language
tracks,
Mickey,
English
and
French,
and
if
you
do
replace
game,
it's
not
clear
if
there's
two
audio
tracks,
for
example,
which
ones
should
be
replaced
with
which
other
ones
so
I
think
we
should
commit
to
replace
track.
I
think
that's
doable
basically,
by
having
a
place
documented
replaced
this
track
with
this
other
track.
M
So
you
have
to
pass
an
old
track
and
then
your
your
the
JavaScript
is
then
be
very
explicit
about
what
should
be
placed.
And
so
then
you
have
about
watering
issues
and
it's
not.
We
don't
need
extra
pros
to
say
that
the
tracks,
the
more
tracks
up
to
be
the
same
and
that's
implicitly,
can't
get
it
wrong.
M
M
Claim
we
don't
actually
care
when
it
happens?
Well,
your
care
is
that
when
that
is
done,
if,
if
you
can
stop
the
old
track-
and
you
can
keep
that
the
recording
will
not
contain
any
friends
that
are
black
searing
and
that
can
be
guaranteed
without
the
JavaScript,
knowing
when
that
actually
happens,
to
replace.
N
M
N
B
N
N
K
B
M
Javascript
is
single-threaded
like
so
you
don't
actually
have
concurrency
with
the
background
friend
and
said
that
you
can
poke.
You
have
concurrency,
but
you
can
manage
it,
so
you
I,
don't
think
it's
I,
don't
think
we
need
locking
in
JavaScript
I
think
you
can
do
multiple
synchronous
methods
in
a
row
and
have
some
sense.
These
have
it
at
the
same
time,
I
think
and.
J
B
AB
B
M
Send
the
replaced
trackers
well,
we
don't
actually
have
anything
and
any
new
for
it
yet,
but
in
that
case
that
should
also
solve
the
concurrence
issue.
Then,
because
then
you
could
do
to
replace
the
motor
base
cracks
on
the
Robo
and
the
Trump's.
All
and
you're
kind
of
use.
Asian
can
I'm
definitely
ensure
that
they
have
enough
take
back
their
job.