質問編集履歴
2
ffmpegのバージョン
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File without changes
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@@ -65,4 +65,24 @@
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>>> import matplotlib
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>>> matplotlib.__version__
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'2.2.2'
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```
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69
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```
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ffmpeg
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ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
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built with gcc 7.2.0 (crosstool-NG fa8859cb)
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configuration: --prefix=/home/usr/anaconda3 --cc=/tmp/build/80754af9/ffmpeg_1526323631431/_build_env/bin/x86_64-conda_cos6-linux-gnu-cc --disable-doc --enable-shared --enable-static --enable-zlib --enable-pic --enable-gpl --enable-version3 --disable-nonfree --enable-hardcoded-tables --enable-avresample --enable-libfreetype --disable-openssl --disable-gnutls --enable-libvpx --enable-pthreads --enable-libopus --enable-postproc --disable-libx264
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libavutil 56. 14.100 / 56. 14.100
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libavcodec 58. 18.100 / 58. 18.100
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libavformat 58. 12.100 / 58. 12.100
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libavdevice 58. 3.100 / 58. 3.100
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libavfilter 7. 16.100 / 7. 16.100
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libavresample 4. 0. 0 / 4. 0. 0
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libswscale 5. 1.100 / 5. 1.100
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libswresample 3. 1.100 / 3. 1.100
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libpostproc 55. 1.100 / 55. 1.100
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Hyper fast Audio and Video encoder
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usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
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Use -h to get full help or, even better, run 'man ffmpeg'
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```
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1
単体で動くコードに変更
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1
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次のようなプロットを動画として出力するコードを動かすと
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```python
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import matplotlib
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matplotlib.use('Agg')
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import random
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import matplotlib.animation as animation
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import matplotlib.pyplot as plt
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3
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-
def
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def run():
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4
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-
def update(k,
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def update(k, ax):
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ax.clear()
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X=[1,2,3,4]
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Y=[random.random() for i in range(len(X))]
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ax.plot(X
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ax.plot(X,Y)
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fig,
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fig,ax=plt.subplots(1,1)
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ani = animation.FuncAnimation(fig, update, fargs=[ax,], interval=50, frames=10)
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ani.save("hogehoge.mp4", writer="ffmpeg")
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-
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run()
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-
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# framse回、画像を更新する。updateの第一引数は0,1,2,...,frames-1を動く。
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ani = animation.FuncAnimation(fig, update, fargs=[Ax, Ay], interval=50, frames=10)
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-
ani.save("hogehoge.mp4", writer="ffmpeg")
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```
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下記のエラーが出ます。
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```
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Traceback (most recent call last):
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File "
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File "main.py", line 20, in <module>
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run()
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run()
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File "
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File "main.py", line 17, in run
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xyplane1.plotEfield()
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File "/home/usr/plot.py", line 266, in plotEfield
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ani.save("hogehoge.mp4", writer="ffmpeg")
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ani.save("hogehoge.mp4", writer="ffmpeg")
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 1200, in save
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 1200, in save
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writer.grab_frame(**savefig_kwargs)
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writer.grab_frame(**savefig_kwargs)
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File "/home/usr/anaconda3/lib/python3.6/contextlib.py", line 99, in __exit__
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File "/home/usr/anaconda3/lib/python3.6/contextlib.py", line 99, in __exit__
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self.gen.throw(type, value, traceback)
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self.gen.throw(type, value, traceback)
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 241, in saving
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 241, in saving
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self.finish()
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self.finish()
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 367, in finish
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 367, in finish
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self.cleanup()
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self.cleanup()
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 405, in cleanup
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File "/home/usr/anaconda3/lib/python3.6/site-packages/matplotlib/animation.py", line 405, in cleanup
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out, err = self._proc.communicate()
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out, err = self._proc.communicate()
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File "/home/usr/anaconda3/lib/python3.6/subprocess.py", line 843, in communicate
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File "/home/usr/anaconda3/lib/python3.6/subprocess.py", line 843, in communicate
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stdout, stderr = self._communicate(input, endtime, timeout)
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stdout, stderr = self._communicate(input, endtime, timeout)
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File "/home/usr/anaconda3/lib/python3.6/subprocess.py", line 1505, in _communicate
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File "/home/usr/anaconda3/lib/python3.6/subprocess.py", line 1505, in _communicate
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selector.register(self.stdout, selectors.EVENT_READ)
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selector.register(self.stdout, selectors.EVENT_READ)
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 351, in register
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 351, in register
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key = super().register(fileobj, events, data)
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key = super().register(fileobj, events, data)
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 237, in register
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 237, in register
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key = SelectorKey(fileobj, self._fileobj_lookup(fileobj), events, data)
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key = SelectorKey(fileobj, self._fileobj_lookup(fileobj), events, data)
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 224, in _fileobj_lookup
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 224, in _fileobj_lookup
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return _fileobj_to_fd(fileobj)
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return _fileobj_to_fd(fileobj)
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 39, in _fileobj_to_fd
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File "/home/usr/anaconda3/lib/python3.6/selectors.py", line 39, in _fileobj_to_fd
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"{!r}".format(fileobj)) from None
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"{!r}".format(fileobj)) from None
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ValueError: Invalid file object: <_io.BufferedReader name=
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ValueError: Invalid file object: <_io.BufferedReader name=6>
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```
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49
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環境は次の通りです。
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