imageio: run get_reader sequentially for thousands time, get IOError: Could not load meta information

In situation where video_files contains full valid paths to 1500 .avi files, I run this simple script

for j,i in enumerate(self.video_files):
	imageio.get_reader(i,'ffmpeg');
	print(j, " done");
print("all done");

I run four times, first crashes at 362 done second crashes at 1073 done third succeeds at all done fourth crashes at 473 done

Error message:

Traceback (most recent call last): File “test.py”, line 69, in init imageio.get_reader(i,‘ffmpeg’); File “/mydir/anaconda3/envs/cntk-py27/lib/python2.7/site-packages/imageio/core/functions.py”, line 129, in get_reader return format.get_reader(request) File “/mydir/anaconda3/envs/cntk-py27/lib/python2.7/site-packages/imageio/core/format.py”, line 169, in get_reader return self.Reader(self, request) File “/mydir/anaconda3/envs/cntk-py27/lib/python2.7/site-packages/imageio/core/format.py”, line 218, in init self._open(**self.request.kwargs.copy()) File “/mydir/anaconda3/envs/cntk-py27/lib/python2.7/site-packages/imageio/plugins/ffmpeg.py”, line 327, in _open self._load_infos() File “/mydir/anaconda3/envs/cntk-py27/lib/python2.7/site-packages/imageio/plugins/ffmpeg.py”, line 480, in _load_infos raise IOError(fmt % err2) IOError: Could not load meta information === stderr === ffmpeg version 3.3.3-static http://johnvansickle.com/ffmpeg/ Copyright © 2000-2017 the FFmpeg developers built with gcc 6.4.0 (Debian 6.4.0-2) 20170724 configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libxvid libavutil 55. 58.100 / 55. 58.100 libavcodec 57. 89.100 / 57. 89.100 libavformat 57. 71.100 / 57. 71.100 libavdevice 57. 6.100 / 57. 6.100 libavfilter 6. 82.100 / 6. 82.100 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 libpostproc 54. 5.100 / 54. 5.100