Recherche avancée
Médias (1)
-
Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (5)
-
Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
-
MediaSPIP Init et Diogène : types de publications de MediaSPIP
11 novembre 2010, parÀ l’installation d’un site MediaSPIP, le plugin MediaSPIP Init réalise certaines opérations dont la principale consiste à créer quatre rubriques principales dans le site et de créer cinq templates de formulaire pour Diogène.
Ces quatre rubriques principales (aussi appelées secteurs) sont : Medias ; Sites ; Editos ; Actualités ;
Pour chacune de ces rubriques est créé un template de formulaire spécifique éponyme. Pour la rubrique "Medias" un second template "catégorie" est créé permettant d’ajouter (...)
Sur d’autres sites (1975)
-
avcodec/speedhqenc : Hardcode table to save space
10 décembre 2020, par Andreas Rheinhardtavcodec/speedhqenc : Hardcode table to save space
The SpeedHQ encoder currently reverses the entries of two small tables
and stores them in other tables. These other tables have a size of 48
bytes, yet the code for their initialization takes 135 bytes (GCC 9.3,
x64, O3 albeit in an av_cold function). So remove the runtime
initialization and hardcode the tables.Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
-
What do I need in order to save animation videos from matplotlib in mp3 format ?
27 juin 2022, par DarthMallocI am using python3.8 on Linux Mint 19.3, and I am trying to save an animation created by a cellular automata model in matplotlib. My actual code for the model is private, but it uses the same code for saving the animation as the code shown below, which is a slight modification of one of the examples shown in the official matplotlib documentation :


import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation

fig, ax = plt.subplots()


def f(x, y):
 return np.sin(x) + np.cos(y)

x = np.linspace(0, 2 * np.pi, 120)
y = np.linspace(0, 2 * np.pi, 100).reshape(-1, 1)

fig, ax = plt.subplots()


 
ims = []
for i in range(60):
 x += np.pi / 15.
 y += np.pi / 20.
 im = ax.imshow(f(x, y), animated=True)
 if i == 0:
 ax.imshow(f(x, y)) # show an initial one first
 ims.append([im])

ani = animation.ArtistAnimation(fig, ims, interval=50, blit=True,
 repeat_delay=1000)

 # To save the animation, use e.g.
 #
 # ani.save("movie.mp4")
 #
 # or
 #
writer = animation.FFMpegWriter(fps=15, metadata=dict(artist='Me'), bitrate=1800)
ani.save("movie.mp3", writer=writer)


When executed, the code produces this error :


MovieWriter stderr:
 Output file #0 does not contain any stream

 Traceback (most recent call last):
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py", line 234, in saving
 yield self
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py", line 1093, in save
 writer.grab_frame(**savefig_kwargs)
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py", line 351, in grab_frame
 self.fig.savefig(self._proc.stdin, format=self.frame_format,
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/figure.py", line 3046, in savefig
 self.canvas.print_figure(fname, **kwargs)
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/backend_bases.py", line 2319, in print_figure
 result = print_method(
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/backend_bases.py", line 1648, in wrapper
 return func(*args, **kwargs)
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/_api/deprecation.py", line 415, in wrapper
 return func(*inner_args, **inner_kwargs)
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/backends/backend_agg.py", line 486, in print_raw
 fh.write(renderer.buffer_rgba())
 BrokenPipeError: [Errno 32] Broken pipe

 During handling of the above exception, another exception occurred:

 Traceback (most recent call last):
 File "/home/justin/animation_test.py", line 36, in <module>
 ani.save("movie.mp3", writer=writer)
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py", line 1093, in save
 writer.grab_frame(**savefig_kwargs)
 File "/usr/lib/python3.8/contextlib.py", line 131, in __exit__
 self.gen.throw(type, value, traceback)
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py", line 236, in saving
 self.finish()
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py", line 342, in finish
 self._cleanup() # Inline _cleanup() once cleanup() is removed.
 File "/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py", line 373, in _cleanup
 raise subprocess.CalledProcessError(
 subprocess.CalledProcessError: Command '['ffmpeg', '-f', 'rawvideo', '-vcodec', 'rawvideo', '-s', '640x480', '-pix_fmt', 'rgba', '-r', '15', '-loglevel', 'error', '-i', 'pipe:', '-vcodec', 'h264', '-pix_fmt', 'yuv420p', '-b', '1800k', '-metadata', 'artist=Me', '-y', 'movie.mp3']' returned non-zero exit status 1.
</module>

I have looked at posts on similar queries concerning matplotlib animations, but none have specifically included the error
Output file #0 does not contain any stream. I have little experience with ffmpeg, so I am wondering what might be missing.

-
concatdec : change data type to suppress warning about limited range of data type...
17 décembre 2012, par Michael Niedermayerconcatdec : change data type to suppress warning about limited range of data type...
Syndiquer tout le site
