I tried to use EasyABC on two different Linux systems with different problems. One is an older Linux Mint (I have to check the version), the other Ubuntu 16.04 LTS.
IIRC playing music worked on the Linux Mint system, but the program was aborted in the print preview with a division by 0. I have to check again for details.
I tried the packages from http://abcplus.sourceforge.net/ first, I also tried to copy the files from https://github.com/jwdj/EasyABC over the installation location.
On Ubuntu 16.04 the scaling in the print preview is wrong, the staves are wider than the paper. Printing to a PDF file seems to work.
On start of the program I get an error message popup "GStreamer error: state change failed and some element failed to post a proper error message with the reason for the failure."
When I try to play the music I get two different error messages"Resource not found." (I think) and "Your GStreamer installation is missing a plug-in".
Unfortunately I don't get any context information. [Which operation triggered this error? (I guess it is related to MIDI playing.) Which plugin seems to be missing? Which version of gstreamer does it actually use? (In case there are different versions installed somewhere.)
On this system gstreamer1.0 is installed. There seems to be also a version 0.10 available, but I think it is not installed. I think I installed all plugin packages.
Can someone guide me how to debug the problems? Can I activate a log file or debug output? Can I find out which code line (if it's in the Python code) or which external program was executed when the error occurred?
I'm not specifically experienced with Python or gstreamer, but I'm a software developer.
Best regards,
Bodo
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Nice to meet a software developer. I am a software developer myself
(mostly C#) and try to improve EasyABC in my spare time (not much spare
time though).
There seem to be some problems with GStreamer on Linux. Especially when
using Linux in a VM like VirtualBox.
That is why I started switching to using FluidSynth. I have this working
in Windows but have not tried it in Linux yet.
In order to use it you need to download a sound font (many free sound
fonts available. for example FluidR3Mono_GM.sf2)
You can get the latest source from https://github.com/jwdj/EasyABC
That is not the complete source, so first get the source from
sourceforge (see link below) and overwrite it with the source from GitHub. https://sourceforge.net/projects/easyabc/files/EasyABC/1.3.7.7/easyabc_source_code_1.3.7.7.zip/download
Printing is a known problem in EasyABC. Some people get many empty pages
when printing. But you are the first to report Print preview issues.
Like yourself I use export to PDF mostly to work around the printing
problem.
I never had Python experience before I started on EasyABC but the
language is not that difficult.
I'm using Visual Studio Code as programming environment for Python
nowadays, but PyCharm is also okay.
If you want to help getting FluidSynth working on Linux (or Mac) your
help is most welcome.
But also if you would like to have a look at the printing part your help
is appreciated.
Most of the code can be found in EasyABC.py
It should work both with Python 2 and 3 so just pick one.
The source contains also a text file on how to get EasyABC working on
Linux. (see using_EasyABC_in_Linux.txt)
Feel free to ask for debugging assistance. The first time it can be
cumbersome to get it working.
Jan Wybren
On 15-10-2018 13:49, Bodo wrote:
I tried to use EasyABC on two different Linux systems with different
problems. One is an older Linux Mint (I have to check the version),
the other Ubuntu 16.04 LTS.
IIRC playing music worked on the Linux Mint system, but the program
was aborted in the print preview with a division by 0. I have to check
again for details.
I tried the packages from http://abcplus.sourceforge.net/ first, I
also tried to copy the files from https://github.com/jwdj/EasyABC over
the installation location.
On Ubuntu 16.04 the scaling in the print preview is wrong, the staves
are wider than the paper. Printing to a PDF file seems to work.
On start of the program I get an error message popup "GStreamer error:
state change failed and some element failed to post a proper error
message with the reason for the failure."
When I try to play the music I get two different error
messages"Resource not found." (I think) and "Your GStreamer
installation is missing a plug-in".
Unfortunately I don't get any context information. [Which operation
triggered this error? (I guess it is related to MIDI playing.) Which
plugin seems to be missing? Which version of gstreamer does it
actually use? (In case there are different versions installed somewhere.)
On this system gstreamer1.0 is installed. There seems to be also a
version 0.10 available, but I think it is not installed. I think I
installed all plugin packages.
Can someone guide me how to debug the problems? Can I activate a log
file or debug output? Can I find out which code line (if it's in the
Python code) or which external program was executed when the error
occurred?
I'm not specifically experienced with Python or gstreamer, but I'm a
software developer.
There seem to be some problems with GStreamer on Linux. Especially when
using Linux in a VM like VirtualBox.
Hello Jan Wybren,
I used normal PCs only, not a VM. IIRC my system was able to play the
music, on my friend's system I get error messages related to gstreamer.
That is why I started switching to using FluidSynth. I have this working
in Windows but have not tried it in Linux yet.
I will try to get it working. (See below)
You can get the latest source from https://github.com/jwdj/EasyABC
That is not the complete source, so first get the source from
sourceforge (see link below) and overwrite it with the source from GitHub.
Wouldn't it be a good idea to add the complete source code to the Git
repository?
Or what's the reason to omit some parts?
Printing is a known problem in EasyABC. Some people get many empty pages
when printing. But you are the first to report Print preview issues.
Like yourself I use export to PDF mostly to work around the printing
problem.
In my case I didn't try printing to a real printer because I'm still
trying to get EasyABC working. On my friend's system the staves were
too wide for the preview window as if the page had been prepared for
landscape format while the preview was in portrait format. I used
printing to file to create a PDF file. There is no printer available
on this PC.
On my Linux Mint PC, where I cannot currently run EasyABC, originally
had some division by 0 error when trying the print preview. IIRC I
found that some wx function returned 0 width and height for the
preview window. i fixed this with a quick hack that replaces 0 by 1,
obviously leading to a wrong scaling. I will dig into this later.
I'm using Visual Studio Code as programming environment for Python
nowadays, but PyCharm is also okay.
I will try this on Linux. Maybe running easy_abc.py in a debugger will
help to find the problems.
When I first tried to run easyabc I got the error "Couldn't find the
FluidSynth library in the program directory." The same after
symlinking libfluidsynth.so.1.5.2 to the program directory. Actually
CDLL('./libfluidsynth.so.1.5.2') doesn't search the file in the
program directory but in the current working directory which is not
necessarily the same as the program directory. After fixing this I got
some other error not related to fluidsynth.
I think I have to re-start from a clean version and check which change
introduced the other problem.
In the file fluidsynth.py i noticed the comment header "Copyright
2012, Willem Vree" ... "partially copied from pyFluidSynth, Copyright
2008 Nathan Whitehead". This seems to be a fairly old version and has
the problem finding the library. I don't know what are the
modifications from the original version at this time.
I found that there is active development of the original version at https://github.com/nwhitehead/pyfluidsynth and a fork with some fixes
for 64bit-Windows https://github.com/reedjones/pyfluidsynth
I did not yet test this version, but the code to find the dynamic
library seems to be more flexible. Maybe there are other improvements.
Willem Vree has made some modifications to FluidSynth so that it could
be used in Python and has accurate midi positioning. I have used his
testplayer to get it working in EasyABC (with his consent, he even made
it especially for EasyABC).
You can find his code and binaries on: https://wim.vree.org/svgParse/testplayer.html
If you can get his testplayer working, then it should be a small step to
get it working in EasyABC.
SourceForge has always been the home of EasyABC (as far as I know) and
the GitHub version is just my own copy of it.
I'll see if I can make it complete one day.
Yes. Guido Gonzato always keeps everything up-to-date (thank you for
that if you are reading this). Chuck Boody keeps him informed of new
versions of EasyABC.
I have used Linux Mint 18 using VirtualBox and EasyABC works fine here,
accept for the gstreamer issues (so no sound).
There seem to be some problems with GStreamer on Linux. Especially
when
using Linux in a VM like VirtualBox.
Hello Jan Wybren,
I used normal PCs only, not a VM. IIRC my system was able to play the
music, on my friend's system I get error messages related to gstreamer.
That is why I started switching to using FluidSynth. I have this
working
in Windows but have not tried it in Linux yet.
I will try to get it working. (See below)
You can get the latest source from https://github.com/jwdj/EasyABC
That is not the complete source, so first get the source from
sourceforge (see link below) and overwrite it with the source from
GitHub.
Wouldn't it be a good idea to add the complete source code to the Git
repository?
Or what's the reason to omit some parts?
Printing is a known problem in EasyABC. Some people get many empty
pages
when printing. But you are the first to report Print preview issues.
Like yourself I use export to PDF mostly to work around the printing
problem.
In my case I didn't try printing to a real printer because I'm still
trying to get EasyABC working. On my friend's system the staves were
too wide for the preview window as if the page had been prepared for
landscape format while the preview was in portrait format. I used
printing to file to create a PDF file. There is no printer available
on this PC.
On my Linux Mint PC, where I cannot currently run EasyABC, originally
had some division by 0 error when trying the print preview. IIRC I
found that some wx function returned 0 width and height for the
preview window. i fixed this with a quick hack that replaces 0 by 1,
obviously leading to a wrong scaling. I will dig into this later.
I'm using Visual Studio Code as programming environment for Python
nowadays, but PyCharm is also okay.
I will try this on Linux. Maybe running easy_abc.py in a debugger will
help to find the problems.
When I first tried to run easyabc I got the error "Couldn't find the
FluidSynth library in the program directory." The same after
symlinking libfluidsynth.so.1.5.2 to the program directory. Actually
CDLL('./libfluidsynth.so.1.5.2') doesn't search the file in the
program directory but in the current working directory which is not
necessarily the same as the program directory. After fixing this I got
some other error not related to fluidsynth.
I think I have to re-start from a clean version and check which change
introduced the other problem.
In the file fluidsynth.py i noticed the comment header "Copyright
2012, Willem Vree" ... "partially copied from pyFluidSynth, Copyright
2008 Nathan Whitehead". This seems to be a fairly old version and has
the problem finding the library. I don't know what are the
modifications from the original version at this time.
I found that there is active development of the original version at https://github.com/nwhitehead/pyfluidsynth and a fork with some fixes
for 64bit-Windows https://github.com/reedjones/pyfluidsynth
I did not yet test this version, but the code to find the dynamic
library seems to be more flexible. Maybe there are other improvements.
my main problem is the music playing on my friend's Ubuntu (IIRC 16.10) system, but I only occasionally have access to it.
I tried again on my Linux Mint 17 Qiana Cinnamon 64-bit with a fresh start.
I removed EasyABC and re-installed the easyabc_1.3.7.7-1_all.deb package provided on http://abcplus.sourceforge.net/
Music play/pause works.
When I try the print preview I get an empty page and on the console I get this error message:
Traceback (most recent call last):
File "/usr/share/easyabc/easy_abc.py", line 1911, in OnPrintPage
scaleX = float(w) / maxX
ZeroDivisionError: float division by zero
I remember that I once already found out that maxX and maxY (page size) are both 0.
Code snippet:
renderer = SvgRenderer(self.can_draw_sharps_and_flats)
try:
page = renderer.svg_to_page(svg)
width = page.svg_width
height = page.svg_height
maxX = width
maxY = height
# Let's have at least 0 device units margin
marginX = 0
marginY = 0
# Add the margin to the graphic size
maxX += 2 * marginX
maxY += 2 * marginY
So there must be something wrong with the SVG renderer.
For debug purposes I added
if maxX == 0:
maxX = 1
if maxY == 0:
maxY = 1
Now I get a preview which looks as if height and width of the score are approx double the page size.
Can you tell me what is used to create the print preview.
In case it's related to something with wx, this is what I have installed:
un libgl1-mesa-swx11 <none> <none> (no description available)
un libgl1-mesa-swx11-dev <none> <none> (no description available)
ii libwxbase2.8-0:amd64 2.8.12.1+dfsg-2ubuntu amd64 wxBase library (runtime) - non-GUI support classes of wxWidgets toolki
ii libwxbase2.8-dev 2.8.12.1+dfsg-2ubuntu amd64 wxBase library (development) - non-GUI support classes of wxWidgets to
ii libwxbase3.0-0:amd64 3.0.0-2 amd64 wxBase library (runtime) - non-GUI support classes of wxWidgets toolki
ii libwxgtk-media2.8-0:amd64 2.8.12.1+dfsg-2ubuntu amd64 wxWidgets Cross-platform C++ GUI toolkit (GTK+ media library runtime)
un libwxgtk2.6-0-python <none> <none> (no description available)
ii libwxgtk2.8-0:amd64 2.8.12.1+dfsg-2ubuntu amd64 wxWidgets Cross-platform C++ GUI toolkit (GTK+ runtime)
ii libwxgtk2.8-dev 2.8.12.1+dfsg-2ubuntu amd64 wxWidgets Cross-platform C++ GUI toolkit (GTK+ development)
un python-wxaddons <none> <none> (no description available)
un python-wxgtk <none> <none> (no description available)
un python-wxgtk2.6 <none> <none> (no description available)
ii python-wxgtk2.8 2.8.12.1+dfsg-2ubuntu amd64 wxWidgets Cross-platform C++ GUI toolkit (wxPython binding)
ii python-wxversion 2.8.12.1+dfsg-2ubuntu all wxWidgets Cross-platform C++ GUI toolkit (wxPython version selector)
un python2.7-wxgtk2.8 <none> <none> (no description available)
ii wx-common 3.0.0-2 amd64 wxWidgets Cross-platform C++ GUI toolkit (common support files)
un wx2.8-doc <none> <none> (no description available)
un wx2.8-examples <none> <none> (no description available)
ii wx2.8-headers 2.8.12.1+dfsg-2ubuntu amd64 wxWidgets Cross-platform C++ GUI toolkit (header files)
un wxpython2.6-0 <none> <none> (no description available)
I have just seen that I have both gstreamer0.10 and gstreamer1.0 packages installed. On the Ubuntu system where playing does not work I have gstreamer1.0 only.
Maybe EasyABC uses gstreamer0.10?
On my Mint system I also have package "python-gst0.10 0.10.22-3ubuntu2 amd64 generic media-playing framework (Python bindings)" installed, but not python-gst-1.0
I have tho check what's installed on the Ubuntu system with non-working sound.
I just tested that playing also works when I install python-gst-1.0 and uninstall python-gst0.10 or when I uninstall both of them, so I guess EasyABC doesn't uses any of these packages.
I'm in contact with Willem Vree about libfluidsynth. Since Sep 14, 2018 fluidsynth version 2.0.x is available which adds a slightly modified version of Willem's changes. He wasn't aware of this.
I'm trying to help with testing the new version of the library.
I also asked on the debian-multimedia mailing list about plans to package fluidsynth 2.0.x.
I hope to get libfluidsynth2 running and integrated in the Linux distributions which might allow using the system's library instead of a modified local copy.
Best regards,
Bodo
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I tried to use EasyABC on two different Linux systems with different problems. One is an older Linux Mint (I have to check the version), the other Ubuntu 16.04 LTS.
IIRC playing music worked on the Linux Mint system, but the program was aborted in the print preview with a division by 0. I have to check again for details.
I tried the packages from http://abcplus.sourceforge.net/ first, I also tried to copy the files from https://github.com/jwdj/EasyABC over the installation location.
On Ubuntu 16.04 the scaling in the print preview is wrong, the staves are wider than the paper. Printing to a PDF file seems to work.
On start of the program I get an error message popup "GStreamer error: state change failed and some element failed to post a proper error message with the reason for the failure."
When I try to play the music I get two different error messages"Resource not found." (I think) and "Your GStreamer installation is missing a plug-in".
Unfortunately I don't get any context information. [Which operation triggered this error? (I guess it is related to MIDI playing.) Which plugin seems to be missing? Which version of gstreamer does it actually use? (In case there are different versions installed somewhere.)
On this system gstreamer1.0 is installed. There seems to be also a version 0.10 available, but I think it is not installed. I think I installed all plugin packages.
Can someone guide me how to debug the problems? Can I activate a log file or debug output? Can I find out which code line (if it's in the Python code) or which external program was executed when the error occurred?
I'm not specifically experienced with Python or gstreamer, but I'm a software developer.
Best regards,
Bodo
Hello Bodo,
Nice to meet a software developer. I am a software developer myself
(mostly C#) and try to improve EasyABC in my spare time (not much spare
time though).
There seem to be some problems with GStreamer on Linux. Especially when
using Linux in a VM like VirtualBox.
That is why I started switching to using FluidSynth. I have this working
in Windows but have not tried it in Linux yet.
In order to use it you need to download a sound font (many free sound
fonts available. for example FluidR3Mono_GM.sf2)
You can get the latest source from https://github.com/jwdj/EasyABC
That is not the complete source, so first get the source from
sourceforge (see link below) and overwrite it with the source from GitHub.
https://sourceforge.net/projects/easyabc/files/EasyABC/1.3.7.7/easyabc_source_code_1.3.7.7.zip/download
Printing is a known problem in EasyABC. Some people get many empty pages
when printing. But you are the first to report Print preview issues.
Like yourself I use export to PDF mostly to work around the printing
problem.
I never had Python experience before I started on EasyABC but the
language is not that difficult.
I'm using Visual Studio Code as programming environment for Python
nowadays, but PyCharm is also okay.
If you want to help getting FluidSynth working on Linux (or Mac) your
help is most welcome.
But also if you would like to have a look at the printing part your help
is appreciated.
Most of the code can be found in EasyABC.py
It should work both with Python 2 and 3 so just pick one.
The source contains also a text file on how to get EasyABC working on
Linux. (see using_EasyABC_in_Linux.txt)
Feel free to ask for debugging assistance. The first time it can be
cumbersome to get it working.
Jan Wybren
On 15-10-2018 13:49, Bodo wrote:
Zitat von "J.W. de Jong" jwdejong@users.sourceforge.net:
Hello Jan Wybren,
I used normal PCs only, not a VM. IIRC my system was able to play the
music, on my friend's system I get error messages related to gstreamer.
I will try to get it working. (See below)
Wouldn't it be a good idea to add the complete source code to the Git
repository?
Or what's the reason to omit some parts?
In my case I didn't try printing to a real printer because I'm still
trying to get EasyABC working. On my friend's system the staves were
too wide for the preview window as if the page had been prepared for
landscape format while the preview was in portrait format. I used
printing to file to create a PDF file. There is no printer available
on this PC.
On my Linux Mint PC, where I cannot currently run EasyABC, originally
had some division by 0 error when trying the print preview. IIRC I
found that some wx function returned 0 width and height for the
preview window. i fixed this with a quick hack that replaces 0 by 1,
obviously leading to a wrong scaling. I will dig into this later.
I will try this on Linux. Maybe running easy_abc.py in a debugger will
help to find the problems.
I tried your latest version with fluidsynth today. My previous test
still used the version from the previous commit
https://github.com/jwdj/EasyABC/commit/f071c15958c4fc37902df230778e759294007ff8
When I first tried to run easyabc I got the error "Couldn't find the
FluidSynth library in the program directory." The same after
symlinking libfluidsynth.so.1.5.2 to the program directory. Actually
CDLL('./libfluidsynth.so.1.5.2') doesn't search the file in the
program directory but in the current working directory which is not
necessarily the same as the program directory. After fixing this I got
some other error not related to fluidsynth.
I think I have to re-start from a clean version and check which change
introduced the other problem.
In the file fluidsynth.py i noticed the comment header "Copyright
2012, Willem Vree" ... "partially copied from pyFluidSynth, Copyright
2008 Nathan Whitehead". This seems to be a fairly old version and has
the problem finding the library. I don't know what are the
modifications from the original version at this time.
I found that there is active development of the original version at
https://github.com/nwhitehead/pyfluidsynth and a fork with some fixes
for 64bit-Windows https://github.com/reedjones/pyfluidsynth
I did not yet test this version, but the code to find the dynamic
library seems to be more flexible. Maybe there are other improvements.
BTW: Are you in contact with Guido Gonzato who provides Linux packages
on http://abcplus.sourceforge.net/?
Best regards,
Bodo
Hello Bodo,
Willem Vree has made some modifications to FluidSynth so that it could
be used in Python and has accurate midi positioning. I have used his
testplayer to get it working in EasyABC (with his consent, he even made
it especially for EasyABC).
You can find his code and binaries on:
https://wim.vree.org/svgParse/testplayer.html
If you can get his testplayer working, then it should be a small step to
get it working in EasyABC.
SourceForge has always been the home of EasyABC (as far as I know) and
the GitHub version is just my own copy of it.
I'll see if I can make it complete one day.
Yes. Guido Gonzato always keeps everything up-to-date (thank you for
that if you are reading this). Chuck Boody keeps him informed of new
versions of EasyABC.
I have used Linux Mint 18 using VirtualBox and EasyABC works fine here,
accept for the gstreamer issues (so no sound).
Greetings,
Jan Wybren
On 18-10-2018 11:56, Bodo wrote:
Hello Hello Jan Wybren,
my main problem is the music playing on my friend's Ubuntu (IIRC 16.10) system, but I only occasionally have access to it.
I tried again on my Linux Mint 17 Qiana Cinnamon 64-bit with a fresh start.
I removed EasyABC and re-installed the easyabc_1.3.7.7-1_all.deb package provided on http://abcplus.sourceforge.net/
Music play/pause works.
When I try the print preview I get an empty page and on the console I get this error message:
Traceback (most recent call last):
File "/usr/share/easyabc/easy_abc.py", line 1911, in OnPrintPage
scaleX = float(w) / maxX
ZeroDivisionError: float division by zero
I remember that I once already found out that maxX and maxY (page size) are both 0.
Code snippet:
renderer = SvgRenderer(self.can_draw_sharps_and_flats) try: page = renderer.svg_to_page(svg) width = page.svg_width height = page.svg_height maxX = width maxY = height # Let's have at least 0 device units margin marginX = 0 marginY = 0 # Add the margin to the graphic size maxX += 2 * marginX maxY += 2 * marginYSo there must be something wrong with the SVG renderer.
For debug purposes I added
if maxX == 0: maxX = 1 if maxY == 0: maxY = 1Now I get a preview which looks as if height and width of the score are approx double the page size.
Can you tell me what is used to create the print preview.
In case it's related to something with wx, this is what I have installed:
I have just seen that I have both gstreamer0.10 and gstreamer1.0 packages installed. On the Ubuntu system where playing does not work I have gstreamer1.0 only.
Maybe EasyABC uses gstreamer0.10?
On my Mint system I also have package "python-gst0.10 0.10.22-3ubuntu2 amd64 generic media-playing framework (Python bindings)" installed, but not python-gst-1.0
I have tho check what's installed on the Ubuntu system with non-working sound.
I just tested that playing also works when I install python-gst-1.0 and uninstall python-gst0.10 or when I uninstall both of them, so I guess EasyABC doesn't uses any of these packages.
This is the package contents:
Can you tell me which files/libraries are needed for EasyABC to access gstreamer.
Best regards,
Bodo
Hello Jan Wybren,
I'm in contact with Willem Vree about libfluidsynth. Since Sep 14, 2018 fluidsynth version 2.0.x is available which adds a slightly modified version of Willem's changes. He wasn't aware of this.
I'm trying to help with testing the new version of the library.
I also asked on the debian-multimedia mailing list about plans to package fluidsynth 2.0.x.
I hope to get libfluidsynth2 running and integrated in the Linux distributions which might allow using the system's library instead of a modified local copy.
Best regards,
Bodo