matplotlib-2.0.0b1 test errors on Windows

[cgohlke]

matplotlib-2.0.0b1 on 64-bit Python 3.5 for Windows errors on two tests.
It looks like updating the rcParams at runtime with the full path to ImageMagick's convert tool no longer has any effect during the tests (it still works outside the tests suite).

======================================================================
ERROR: __main__.test_save_animation_smoketest('imagemagick_file', 'gif')
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python35\lib\site-packages\nose\case.py", line 198, in runTest
    self.test(*self.arg)
  File "X:\Python35\lib\site-packages\matplotlib\testing\decorators.py", line 152, in wrapped_callable
    func(*args, **kwargs)
  File "test_animation.py", line 57, in check_save_animation
    anim.save(F.name, fps=30, writer=writer, bitrate=500)
  File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 838, in save
    writer.grab_frame(**savefig_kwargs)
  File "X:\Python35\lib\contextlib.py", line 66, in __exit__
    next(self.gen)
  File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 202, in saving
    self.finish()
  File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 402, in finish
    + ' Try running with --verbose-debug')
RuntimeError: Error creating movie, return code: 4 Try running with --verbose-debug

======================================================================
ERROR: __main__.test_save_animation_smoketest('imagemagick', 'gif')
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 236, in grab_frame
    dpi=self.dpi, **savefig_kwargs)
  File "X:\Python35\lib\site-packages\matplotlib\figure.py", line 1533, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "X:\Python35\lib\site-packages\matplotlib\backend_bases.py", line 2245, in print_figure
    **kwargs)
  File "X:\Python35\lib\site-packages\matplotlib\backends\backend_agg.py", line 508, in print_raw
    fileobj.write(renderer._renderer.buffer_rgba())
OSError: [Errno 22] Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "X:\Python35\lib\site-packages\nose\case.py", line 198, in runTest
    self.test(*self.arg)
  File "X:\Python35\lib\site-packages\matplotlib\testing\decorators.py", line 152, in wrapped_callable
    func(*args, **kwargs)
  File "test_animation.py", line 57, in check_save_animation
    anim.save(F.name, fps=30, writer=writer, bitrate=500)
  File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 838, in save
    writer.grab_frame(**savefig_kwargs)
  File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 244, in grab_frame
    'with --verbose-debug.'.format(e, out, err))
OSError: Error saving animation to file (cause: [Errno 22] Invalid argument) Stdout: b'' StdError: b'Invalid Parameter - 800x600\r\n'. It may help to re-run with --verbose-debug.

[WeatherGod]

yeah, the test suite is probably running those tests under the "classic"
mode, and would be completely ignoring the default rcparams (which is a
feature, not a bug, for the most part). Not exactly sure how to fix it.
Perhaps mark as skip on Windows for now?

On Wed, Jun 1, 2016 at 2:48 PM, Christoph Gohlke notifications@github.com
wrote:

matplotlib-2.0.0b1 on 64-bit Python 3.5 for Windows errors on two tests.
It looks like updating the rcParams at runtime
https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/animation.py#L667
with the full path to ImageMagick's convert tool no longer has any effect
during the tests (it still works outside the tests suite).

ERROR: main.test_save_animation_smoketest('imagemagick_file', 'gif')

Traceback (most recent call last):
File "X:\Python35\lib\site-packages\nose\case.py", line 198, in runTest
self.test(_self.arg)
File "X:\Python35\lib\site-packages\matplotlib\testing\decorators.py", line 152, in wrapped_callable
func(_args, **kwargs)
File "test_animation.py", line 57, in check_save_animation
anim.save(F.name, fps=30, writer=writer, bitrate=500)
File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 838, in save
writer.grab_frame(**savefig_kwargs)
File "X:\Python35\lib\contextlib.py", line 66, in exit
next(self.gen)
File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 202, in saving
self.finish()
File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 402, in finish
+ ' Try running with --verbose-debug')
RuntimeError: Error creating movie, return code: 4 Try running with --verbose-debug

ERROR: main.test_save_animation_smoketest('imagemagick', 'gif')

Traceback (most recent call last):
File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 236, in grab_frame
dpi=self.dpi, *_savefig_kwargs)
File "X:\Python35\lib\site-packages\matplotlib\figure.py", line 1533, in savefig
self.canvas.print_figure(_args, *_kwargs)
File "X:\Python35\lib\site-packages\matplotlib\backend_bases.py", line 2245, in print_figure
*_kwargs)
File "X:\Python35\lib\site-packages\matplotlib\backends\backend_agg.py", line 508, in print_raw
fileobj.write(renderer._renderer.buffer_rgba())
OSError: [Errno 22] Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "X:\Python35\lib\site-packages\nose\case.py", line 198, in runTest
self.test(_self.arg)
File "X:\Python35\lib\site-packages\matplotlib\testing\decorators.py", line 152, in wrapped_callable
func(_args, **kwargs)
File "test_animation.py", line 57, in check_save_animation
anim.save(F.name, fps=30, writer=writer, bitrate=500)
File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 838, in save
writer.grab_frame(**savefig_kwargs)
File "X:\Python35\lib\site-packages\matplotlib\animation.py", line 244, in grab_frame
'with --verbose-debug.'.format(e, out, err))
OSError: Error saving animation to file (cause: [Errno 22] Invalid argument) Stdout: b'' StdError: b'Invalid Parameter - 800x600\r\n'. It may help to re-run with --verbose-debug.

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[tacaswell]

It would be better to just do that rcparams update locally in those tests.

This does point to a possibly larger problem if mpl.style.use blows away this setting.

Are we not installing these external tools on appveyor?

attn @JanSchulz

[cgohlke]

I don't think the AppVeyor setup uses any of the optional requirements such as Pillow, MiKTeX, GhostScript, ffmpeg, avconv, mencoder, ImageMagick, or Inkscape. Over 1000 tests are skipped.

[jankatins]

Miktex and pillow are on conda-forge which also give us GhostScript, but the rest seems to be not yet packaged :-(

• imagemagick: packages imagemagick conda-forge/staged-recipes#707
• inkscape: Package inkscape conda-forge/staged-recipes#512
• ffmpeg: build windows version of package... conda-forge/ffmpeg-feedstock#7
• mencoder: package mencoder conda-forge/staged-recipes#709

I managed to install ffmpeg from a conda channel (repackaged) and found choco packages for ImageMagick and Inkscape: #6520

[ehfo0]

how did u fix it?