decodebin2 data internal error inside videomixer - gstreamer

I'm trying to create an image vector with Gstreamer. To do that I use the videomixer gref like that :
gst-launch -e \videomixer name = mixer \
sink_0::xpos = 0 sink_0::ypos = 0 \
sink_1::xpos = 100 sink_1::ypos = 0 \
sink_2::xpos = 200 sink_2::ypos = 0 \
sink_3::xpos = 300 sink_3::ypos = 0 \
sink_4::xpos = 400 sink_4::ypos = 0 \
sink_5::xpos = 500 sink_5::ypos = 0 \
sink_6::xpos = 600 sink_6::ypos = 0 \
sink_7::xpos = 700 sink_7::ypos = 0 \
sink_8::xpos = 0 sink_8::ypos = 0 \
! xvimagesink \
filesrc location = 0.jpg \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_0. \
filesrc location = 1.jpeg \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_1. \
filesrc location = 2.png \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_2. \
filesrc location = 3.png \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_3. \
filesrc location = 4.png \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_4. \
filesrc location = 5.png \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_5. \
filesrc location = 6.JPG \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_6. \
filesrc location = 7.png \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! videoscale method = 1 ! video/x-raw-yuv, width = 100, height = 100 ! mixer.sink_7. \
filesrc location = bg.jpg \
! decodebin2 ! ffmpegcolorspace \
! imagefreeze ! mixer.sink_8.
But I've a problem, it's seems to work with only several type of image (very often with .png, but not with .jpg for example). I d'ont understand, decodebin is supposed to be independant of the file format, isn't it ?
I tried to put the same png file for each element of the vector and it's ok, so what's wrong ? I've the following error : "Data stream internal error".
Do you have an idea ?
Thanks !
(Sorry about my english, I'm french)


firstly which gstreamer version are you using? (0.10 or 1.0).
If you use 0.10, I recommand you to use videomixer2.
videomixer is very sensitive about the input format, so I recommande you to add in each input pad of videomixer a specific format in your caps something like that
"video/x-raw-yuv, format=(fourcc)AYUV, width=100, height=100"
If you don't have a transparency PNG I will advice to use this one:
"video/x-raw-yuv, format=(fourcc)I420, width=100, height=100"
It's should be works

Related

Visualize 2D and 3D shapes in code using templates [closed]

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Improve this question
I remember a library (a single header I think) based on templates and operators overloading that allowed to visualize 2D and 3D shapes in code, with expressions like:
assert( (I-----o
| |
o-----I).area() == (I---o
| |
| |
o---I).area() );
And even more complicated stuff for 3D shapes.
I had a link to this library but can't find the link... (I may have bookmarked it, but can't find the bookmark).
Google is not much helpful either, at least not with my search keywords.
Anybody knows what I'm talking about?

Thanks to Story Teller, the link is:
http://www.eelis.net/C++/analogliterals.xhtml
With a fork here:
https://github.com/Quuxplusone/analog-literals
Some actual code examples:
unsigned int c = ( o-----o
| !
! !
! !
o-----o ).area;
assert( c == (I-----I) * (I-------I) );
assert( ( o-----o
| !
! !
! !
! !
o-----o ).area == ( o---------o
| !
! !
o---------o ).area );
And with 3D shapes:
assert( top( o-------o
|L \
| L \
| o-------o
| ! !
! ! !
o | !
L | !
L| !
o-------o ) == ( o-------o
| !
! !
o-------o ) );
assert( ( o-------------o
|L \
| L \
| L \
| o-------------o
| ! !
! ! !
o | !
L | !
L | !
L| !
o-------------o ).volume == ( o-------------o
| !
! !
! !
o-------------o ).area
* int(I-------------I) );
And it is mentioned in other SO posts, added in comments to the question.

Type mismatch in argument: passed COMPLEX(8) to REAL(8)

I'm trying to compile and run a relatively old code from a PhD thesis, you can find whole code in Appendices C and D of this document.
Here is necessary parts from the code:
from wfMath.f90 :
subroutine wfmath_gaussian(widthz,pz)
use progvars
implicit none
real*8, intent(in) :: widthz ! the width of the wavepacket
real*8, intent(in) :: pz ! momentum
integer :: nR
real*8 :: rvalue
complex*16 :: cvalue
! complex*16 :: psi !!!ORIGINAL CODE LINE 23/02/2018. Saba
complex*16, dimension(1) :: psi !!! psi is originally defined as a scalar. But wfmath_normalize(wf) takes a rank-1 tensor as
!argument. So here I change the declaration of psi from a scalar to a rank-1 tensor contains only one element. 23/02/2018. Saba
real*8 :: z2
z2 = minz + deltaz
do nR=1, nz
rvalue = exp( -((z2-centerz)/widthz)**2 /2 )/ (2*pi*widthz) !!!ORIGINAL CODE LINE
!rvalue = exp( -((z2-centerz)/1.0d0)**2 /2 )/ (2*pi*1.0d0)
cvalue = cdexp( cmplx(0.0,1.0)*(pz*z2))
psi(nR) = rvalue * cvalue
z2 = z2 + deltaz ! next grid position in x-direction
enddo
call wfmath_normalize(psi)
end subroutine wfmath_gaussian
from tdse.f90 - main part :
subroutine init
use progvars
use strings;
use wfMath;
use wfPot;
!use tdseMethods;
implicit none
integer :: nloop
real*8 :: widthz,pz
select case (trim(molecule))
case("H2")
mass = 917.66d0; nz = 2048; deltaz = 0.05d0;
case("D2")
mass = 1835.241507d0; nz = 1024; deltaz = 0.05d0;
case("N2")
mass = 12846.69099d0; nz = 512; deltaz = 0.01d0;
case("O2")
mass = 14681.93206d0; nz =8192 ; deltaz = 0.005d0;
case("Ar2")
mass = 36447.94123d0; nz = 65536; deltaz = 0.002d0;
end select
maxt = 33072.80d0 !800fs ! maximum time
deltat = 1.0d0 ! delta time
widthz = 1.0d0 ! width of the gaussian
minz = 0.05d0 ! minimum z in a.u.
maxz = nz * deltaz ! maximum z in a.u.
centerz = 2.1d0 ! center of the gaussian
nt = NINT(maxt/deltat) ! time steps
pz = 0.d0 ! not used currently
!_____________________________FFT Section____________________________________________
deltafft = 20.d0* deltat !1.0d0*deltat ! time step for FFT
nfft = NINT(maxt/deltafft) ! no of steps for FFT
!_________________________absorber parameters_______________________________________
fadewidth = 10.d0 ! the width of the absorber in a.u.
fadestrength = 0.01d0 ! the maximum heigth of the negative imaginary potential
!_________________________E FIELD section_____________________________________________
Ewidth = 1446.2d0 !35fs ! width of the envelope
Eo = 0.053 !E14 ! field amplitude
Eomega = 0.057d0 !800nm ! laser frequency
! Eomega = 0.033d0 !1400nm ! laser frequency
Ephi = 0.d0 ! carrier envelope phase
Eto = 1000.d0 ! ecenter of the Gaussian envelope
EoPed = 0.0755 !2E14
EwidthPed = 826.638 !20fs
EomegaPed = Eomega
EphiPed = 0.d0
EtoPed = 1000.d0
EoPump = 0.053 !1E14 0.00285d0
EwidthPump = Ewidth
EomegaPump = 0.057d0
EphiPump = 0.0d0
EtoPump = 0.d0
includeAbsorber = .true. ! switch for absorber
includeField = .true. ! .false. ! switch for efield
includePedestal = .false. ! switch for pedestal
includeConstantPump = .true. ! .false. ! switch for efield
useADK = .false. ! ADK switch
calculatePowerSpectra = .true.
calculateKERPowerSpectra = .true. !.false.
!_____________________________Printing & Plotting Filters__________________________________
printFilter = nz
maxFrequencyFilter = 500
printInterval =100 !200
! print filter upper boundary check
if(printFilter > nz) then
printFilter = nz
end if
call allocateArrays();
do nloop = 1,nz
Z(nloop) = minz+ (nloop)* deltaz;
P(nloop) = 2*pi*(nloop-(nz/2)-1)/(maxz-minz);
E(nloop) = 27.2*(P(nloop)**2)/(4.d0*mass);
end do
! call wfmath_gaussian(psiground,widthz,pz) !!! ORIGINAL CODE LINE
call wfmath_gaussian(psiground,real(widthz),pz) ! Attempt to solve mismatch error. Does not work. Saba 24/02/2018
! call wfmath_gaussian(psiground,1.0d0,pz) ! Attempt to solve mismatch error. Does not work. Saba 23/02/2018
! call wfmath_gaussian(pz) ! Attempt to solve mismatch error. Does not work. Saba 23/02/2018
call setabsorber_right(fadewidth, fadestrength)
call printpsi(psiground,trim(concat(outputFolder,"psi_gausssian.dat")))
call potentials_init(nz) !initialize potential arrays
call read_potential();
end subroutine init
As far as I understand, there is no mismatch at all. widthz is declared as real*8 in main part of the code (subroutine init), and subroutine wfmath_gaussian(...) expects widthz to be a real*8. I can't see where this mismatch error occurs?
used compiler: GNU Fortran 6.3.0
used compile line: $gfortran tdse.f90
error message:
tdse.f90:159:118:
call wfmath_gaussian(psiground,real(widthz),pz) ! Attempt to solve mismatch error. Does not work. Saba 24/02/2018
(1)
Error: Type mismatch in argument 'widthz' at (1); passed COMPLEX(8) to REAL(8)
Thanks in advance...

How to print the following pattern by using while-loops in python?

How can I print the following pattern using while loops in python?
! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !
\ \ ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! / /
\ \ \ \ ! ! ! ! ! ! ! ! ! ! ! ! ! ! / / / /
\ \ \ \ \ \ ! ! ! ! ! ! ! ! ! ! / / / / / /
\ \ \ \ \ \ \ \ ! ! ! ! ! ! / / / / / / / /
\ \ \ \ \ \ \ \ \ \ ! ! / / / / / / / / / /
Any help would be really appreciated. Thank you.

This may also be solved using for loop but since the question explicitly mentioned while loop:
total = 22
n = 0
while n < 6:
side = n*2
middle = total - side*2
line = '\\'*side + '!'*middle + '/'*side
print(line)
n += 1
Let me know if anything needs explanation.

there are two easy ways to do this
while True:
print '! '*22
print '\ '*2+'! '*18+'/ '*2
print '\ '*4+'! '*14+'/ '*4
print '\ '*6+'! '*10+'/ '*6
print '\ '*8+'! '*6+'/ '*8
print '\ '*10+'! '*2+'/ '*10
break
or maybe
x=0
while x<6:
print '\ '*(2*x)+'! '*(22-(4*x))+'/ '*(2*x)
x+=1

Try this:
ExcCount = 22
SlashCount = 2
i = 1
while i <= 6:
String = (SlashCount * "\ ") + (ExcCount * "! ") + (SlashCount * "/ ")
print(String)
ExcCount -= 4
SlashCount -= 2
i += 1

Partition a 3D array AND use allgather

I now want to use the allgather to rebuild a 3D array. 16 cups are claimed and the data of the Y-Z plane are partitioned into 4*4 parts.
Also a new type (newtype) is created for convenience.
Are the errors related to this new type, Thanks!
!==================================================================================================================================
!****** [ Program main ] ********************************************************************************************************
!==================================================================================================================================
program main
Use mpi
implicit none
integer i, j, k, count, realsize
integer, parameter :: nx = 8, ny = 8, nz = 8
Integer :: interval
real(4), dimension(nx,ny,nz):: u_xyz
Real(4),dimension(:,:,:), allocatable :: Temp0
! === MPI Related ===
Integer, Parameter :: master = 0
Integer :: ierr, num_procs, myid, p_row, p_col, newtype, resizedtype
integer, save :: MPI_COMM_CART
integer, dimension(2) :: dims, coord
Integer, Dimension(2) :: R_coord, C_coord, MPGD
Integer, Dimension(3) :: sizes, subsizes, starts
integer,dimension(:),allocatable :: displacement
integer(kind=mpi_address_kind) :: lb, extent
logical, dimension(2) :: periodic
!--------------=======--------------
! Initialize MPI
!
call MPI_Init ( ierr )
!
! Get the number of processes.
!
call MPI_Comm_size ( MPI_COMM_WORLD, num_procs, ierr )
!
! Get the individual process ID.
!
call MPI_Comm_rank ( MPI_COMM_WORLD, myid, ierr )
!--------------=======--------------
! Y-Z PLANE SPLIT
!--------------=======--------------
p_row = 4; p_col = 4
If(p_row*p_col .NE. num_procs) Print *, 'Wrong CPU Numbers'
!--------------=======--------------
dims(1) = p_row
dims(2) = p_col
periodic(1) = .false.
periodic(2) = .false.
call MPI_CART_CREATE(MPI_COMM_WORLD,2,dims,periodic, &
.false., & ! do not reorder rank
MPI_COMM_CART, ierr)
call MPI_CART_COORDS(MPI_COMM_CART,myid,2,coord,ierr)
!--------------=======--------------
!----------YZ Plane Locations-----
!--------------=======--------------
Interval = Ceiling(dble(ny)/dble(p_row))
If (coord(1) .NE. p_row-1 ) then
R_coord(1) = 1 + (coord(1))*Interval
R_coord(2) = R_coord(1) + Interval - 1
Else
R_coord(1) = 1 + coord(1)*Interval
R_coord(2) = ny
End If
Interval = Ceiling(dble(nz)/dble(p_col))
If (coord(2) .NE. p_col-1 ) then
C_coord(1) = 1 + (coord(2))*Interval
C_coord(2) = C_coord(1) + Interval - 1
Else
C_coord(1) = 1 + (coord(2))*Interval
C_coord(2) = nz
End If
!--------------=======--------------
!----------Obtain displacement-----
!--------------=======--------------
! COUNT = 0
! DO K=1,nz
! DO J=1,ny
! DO I=1,nx
! If(i==1.and.j== R_coord(1).and.k==C_coord(1)) print *, myid, R_coord(1), C_coord(1), COUNT
! COUNT = COUNT + 1
! ENDDO
! ENDDO
! ENDDO
allocate(Temp0(nx,R_coord(1):R_coord(2),C_coord(1):C_coord(2)))!
allocate(displacement(num_procs))
Do k=C_coord(1),C_coord(2)
Do j=R_coord(1),R_coord(2)
Do i=1,nx
u_xyz(i,j,k)= i+j+k
End Do; End Do
End Do
Do i=0,num_procs-1
displacement(i)= (i/4)*(16) + mod(i,4)*128
! if(myid==0) print *, i, displacement(i)
Enddo
!--------------=======--------------
! --- Create the same block type ---
!--------------=======--------------
sizes(1) = nx
sizes(2) = ny
sizes(3) = nz
subsizes(1) = nx
subsizes(2) = R_coord(2)-R_coord(1)+1
subsizes(3) = C_coord(2)-C_coord(1)+1
starts(1) = 0 ! 0-based index
starts(2) = 0
starts(3) = 0
call MPI_TYPE_CREATE_SUBARRAY(3, sizes, subsizes, starts, &
MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr)
call MPI_Type_size(MPI_REAL, realsize, ierr)
extent = 1*realsize
lb = 0
call MPI_Type_create_resized(newtype, lb, extent, resizedtype, ierr)
call MPI_Type_commit(resizedtype, ierr)
Call MPI_Allgather(Temp0(1,R_coord(1),C_coord(1)),resizedtype, &
1, u_xyz, resizedtype, displacement, &
1, MPI_COMM_WORLD)
call MPI_TYPE_FREE(newtype,ierr)
777 Format(15e25.16e3)
Call MPI_Barrier(MPI_COMM_WORLD, ierr)
Call MPI_Finalize ( ierr )
stop
end program main
The code had some error messages as follows:
[desktop:18885] *** An error occurred in MPI_Allgather
[desktop:18885] *** reported by process [139648622723073,139646566662149]
[desktop:18885] *** on communicator MPI_COMM_SELF
[desktop:18885] *** MPI_ERR_TYPE: invalid datatype
[desktop:18885] *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort,
[desktop:18885] *** and potentially your MPI job)
-------------------------------------------------------
Primary job terminated normally, but 1 process returned
a non-zero exit code.. Per user-direction, the job has been aborted.
-------------------------------------------------------
--------------------------------------------------------------------------
mpirun detected that one or more processes exited with non-zero status, thus causing
the job to be terminated. The first process to do so was:
Process name: [[31373,1],0]
Exit code: 3
--------------------------------------------------------------------------
[desktop:18878] 7 more processes have sent help message help-mpi-errors.txt / mpi_errors_are_fatal
[desktop:18878] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages

The correct code. Thanks to the comments above. Care should be taken when defining the type, such as.
recvcounts
integer array (of length group size) containing the number of elements that are to be received from each process
displs
integer array (of length group size). Entry i specifies the displacement (relative to recvbuf ) at which to place the incoming
data from process i recvtype
!==================================================================================================================================
!****** [ Program main ] ********************************************************************************************************
!==================================================================================================================================
program main
Use mpi
implicit none
integer i, j, k,ii
integer count, realsize
integer, parameter :: nx = 8, ny = 8, nz = 8
Integer :: interval
real(4), dimension(nx*ny*nz):: u_xyz
Real(4),dimension(:,:,:), allocatable :: Temp0
! === MPI Related ===
Integer, Parameter :: master = 0
Integer :: ierr, num_procs, myid, p_row, p_col, newtype, resizedsd, resizedrv
integer, save :: MPI_COMM_CART
integer, dimension(2) :: dims, coord
Integer, Dimension(2) :: R_coord, C_coord, MPGD
Integer, Dimension(3) :: sizes, subsizes, starts
integer,dimension(:),allocatable :: displacement, recvcnt
integer(kind=mpi_address_kind) :: lb, extent
logical, dimension(2) :: periodic
!--------------=======--------------
! Initialize MPI
!
call MPI_Init ( ierr )
!
! Get the number of processes.
!
call MPI_Comm_size ( MPI_COMM_WORLD, num_procs, ierr )
!
! Get the individual process ID.
!
call MPI_Comm_rank ( MPI_COMM_WORLD, myid, ierr )
!--------------=======--------------
! Y-Z PLANE SPLIT
!--------------=======--------------
p_row = 4; p_col = 4
If(p_row*p_col .NE. num_procs) Print *, 'Wrong CPU Numbers'
!--------------=======--------------
dims(1) = p_row
dims(2) = p_col
periodic(1) = .false.
periodic(2) = .false.
call MPI_CART_CREATE(MPI_COMM_WORLD,2,dims,periodic, &
.false., & ! do not reorder rank
MPI_COMM_CART, ierr)
call MPI_CART_COORDS(MPI_COMM_CART,myid,2,coord,ierr)
!--------------=======--------------
!----------YZ Plane Locations-----
!--------------=======--------------
Interval = Ceiling(dble(ny)/dble(p_row))
If (coord(1) .NE. p_row-1 ) then
R_coord(1) = 1 + (coord(1))*Interval
R_coord(2) = R_coord(1) + Interval - 1
Else
R_coord(1) = 1 + coord(1)*Interval
R_coord(2) = ny
End If
Interval = Ceiling(dble(nz)/dble(p_col))
If (coord(2) .NE. p_col-1 ) then
C_coord(1) = 1 + (coord(2))*Interval
C_coord(2) = C_coord(1) + Interval - 1
Else
C_coord(1) = 1 + (coord(2))*Interval
C_coord(2) = nz
End If
!--------------=======--------------
!----------Obtain displacement-----
!--------------=======--------------
! COUNT = 0
! DO K=1,nz
! DO J=1,ny
! DO I=1,nx
! If(i==1.and.j== R_coord(1).and.k==C_coord(1)) print *, myid, R_coord(1), C_coord(1), COUNT
! COUNT = COUNT + 1
! ENDDO
! ENDDO
! ENDDO
allocate(Temp0(1:nx,R_coord(1):R_coord(2),C_coord(1):C_coord(2)))!
allocate(displacement(num_procs),recvcnt(num_procs))
Do k=C_coord(1),C_coord(2)
Do j=R_coord(1),R_coord(2)
Do i=1,nx
Temp0(i,j,k)= i+j*10+k*100
End Do; End Do
End Do
Do i=1,num_procs
ii = i-1
displacement(i)= (ii/4)*(16) + mod(ii,4)*128
! if(myid==0) print *, i, displacement(i)
Enddo
!--------------=======--------------
! --- Create the same block type ---
!--------------=======--------------
sizes(1) = nx
sizes(2) = ny
sizes(3) = nz
subsizes(1) = nx
subsizes(2) = R_coord(2)-R_coord(1)+1
subsizes(3) = C_coord(2)-C_coord(1)+1
starts(1) = 0 ! 0-based index
starts(2) = 0
starts(3) = 0
recvcnt(:)= 1
call MPI_TYPE_CREATE_SUBARRAY(3, sizes, subsizes, starts, &
MPI_ORDER_FORTRAN, MPI_REAL, newtype, ierr)
call MPI_Type_size(MPI_REAL, realsize, ierr)
extent = 1*realsize
lb = 0
call MPI_Type_create_resized(newtype, lb, extent, resizedrv, ierr)
call MPI_Type_commit(resizedrv, ierr)
Call MPI_AllgatherV(Temp0(1,R_coord(1),C_coord(1)), subsizes(1)*subsizes(2)*subsizes(3), MPI_REAL, &
u_xyz, recvcnt,displacement, resizedrv, MPI_COMM_WORLD, ierr)
call MPI_TYPE_FREE(resizedrv,ierr)
! If(myid.eq.10) then
! Count = 0
! do k=1,nz
! do J=1,ny
! do i=1,nx
! Count = Count + 1
! print*, u_xyz(count)- (i+j*10+k*100), i,j,k
! enddo; enddo; enddo
! end if
777 Format(15e25.16e3)
Call MPI_Barrier(MPI_COMM_WORLD, ierr)
Call MPI_Finalize ( ierr )
stop
end program main

gstreamer pipeline with VADER element stalls on PAUSE when used with a tee

I have this pipeline that uses pocketsphinx's VAD element :
Gst.parse_launch(
"pulsesrc device=\"alsa_input.usb-046d_08c9_674634A4-02-U0x46d0x8c9.analog-mono\" " +
"! vader name=vad auto-threshold=true " +
"! level name=wavelevel interval=100000000 " + // level interval is in nanoseconds
"! wavenc " +
"! filesink location=audioz.wav"
);
It works fine except that the streaming stops when there is no voice comming in the
source.
I want to recording to continue independently of the VAD,
so I tried this pipeline with a tee :
Gst.parse_launch(
"pulsesrc device=\"alsa_input.usb-046d_08c9_674634A4-02-U0x46d0x8c9.analog-mono\" " +
"! tee name=t " +
"! queue " +
"! vader name=vad auto-threshold=true " +
"! fakesink t. sync=false" +
"! queue " +
"! level name=wavelevel interval=100000000 " + // level interval is in nanoseconds
"! wavenc " +
"! filesink location=audioz.wav"
);
And this one is always stalling, state going from NULL -> READY -> PAUSE,
and stalling forever on PAUSE.
The goal of the "independent VAD" is simply to record the begining and end time
of voice segments (detected by the VAD).
Update :
commenting the line : "! fakesink t. sync=false"
solves the problem, so the following pipeline does what I need :
this.pipeline = Gst.parse_launch(
"pulsesrc device=\"alsa_input.usb-046d_08c9_674634A4-02-U0x46d0x8c9.analog-mono\" " +
" ! tee name=t" +
" t. ! queue " +
" ! vader name=vad auto-threshold=true " +
" t. ! queue " +
" ! level name=wavelevel interval=1000000000 " + // level interval is in nanoseconds
" ! wavenc " +
" ! filesink location=audioz.wav"
);
The remaining question is if it's OK to have a queue without a sink...

The easiest solution is to set async=0 on both sinks. (fakesink and filesink)