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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
Autres articles (62)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
MediaSPIP version 0.1 Beta
16 avril 2011, parMediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)
Sur d’autres sites (7017)
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How can fix CalledProcessError : in ffmpeg
7 décembre 2020, par MarioI hope someone can help to troubleshoot this problem. I'm trying to save the loss plots out of Keras in the form of the following animation.






but I have been facing the following error, and ultimately I can't save the animation :



MovieWriter stderr:
[h264_v4l2m2m @ 0x55a67176f430] Could not find a valid device
[h264_v4l2m2m @ 0x55a67176f430] can't configure encoder
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

---------------------------------------------------------------------------
BrokenPipeError Traceback (most recent call last)
~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/animation.py in saving(self, fig, outfile, dpi, *args, **kwargs)
 229 try:
--> 230 yield self
 231 finally:

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/animation.py in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs, progress_callback)
 1155 frame_number += 1
-> 1156 writer.grab_frame(**savefig_kwargs)
 1157 

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/animation.py in grab_frame(self, **savefig_kwargs)
 383 self.fig.savefig(self._frame_sink(), format=self.frame_format,
--> 384 dpi=self.dpi, **savefig_kwargs)
 385 

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/figure.py in savefig(self, fname, transparent, **kwargs)
 2179 
-> 2180 self.canvas.print_figure(fname, **kwargs)
 2181 

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/backend_bases.py in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, bbox_inches, **kwargs)
 2081 bbox_inches_restore=_bbox_inches_restore,
-> 2082 **kwargs)
 2083 finally:

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/backends/backend_agg.py in print_raw(self, filename_or_obj, *args, **kwargs)
 445 cbook.open_file_cm(filename_or_obj, "wb") as fh:
--> 446 fh.write(renderer._renderer.buffer_rgba())
 447 

BrokenPipeError: [Errno 32] Broken pipe

During handling of the above exception, another exception occurred:

CalledProcessError Traceback (most recent call last)
 in <module>
 17 print(f'{model_type.upper()} Train Time: {Timer} sec')
 18 
---> 19 create_loss_animation(model_type, hist.history['loss'], hist.history['val_loss'], epoch)
 20 
 21 evaluate(model, trainX, trainY, testX, testY, scores_train, scores_test)

 in create_loss_animation(model_type, loss_hist, val_loss_hist, epoch)
 34 
 35 ani = matplotlib.animation.FuncAnimation(fig, animate, fargs=(l1, l2, loss, val_loss, title), repeat=True, interval=1000, repeat_delay=1000)
---> 36 ani.save(f'loss_animation_{model_type}_oneDataset.mp4', writer=writer)

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/animation.py in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs, progress_callback)
 1154 progress_callback(frame_number, total_frames)
 1155 frame_number += 1
-> 1156 writer.grab_frame(**savefig_kwargs)
 1157 
 1158 # Reconnect signal for first draw if necessary

~/anaconda3/envs/CR7/lib/python3.6/contextlib.py in __exit__(self, type, value, traceback)
 97 value = type()
 98 try:
---> 99 self.gen.throw(type, value, traceback)
 100 except StopIteration as exc:
 101 # Suppress StopIteration *unless* it's the same exception that

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/animation.py in saving(self, fig, outfile, dpi, *args, **kwargs)
 230 yield self
 231 finally:
--> 232 self.finish()
 233 
 234 

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/animation.py in finish(self)
 365 def finish(self):
 366 '''Finish any processing for writing the movie.'''
--> 367 self.cleanup()
 368 
 369 def grab_frame(self, **savefig_kwargs):

~/anaconda3/envs/CR7/lib/python3.6/site-packages/matplotlib/animation.py in cleanup(self)
 409 if self._proc.returncode:
 410 raise subprocess.CalledProcessError(
--> 411 self._proc.returncode, self._proc.args, out, err)
 412 
 413 @classmethod

CalledProcessError: Command '['/usr/bin/ffmpeg', '-f', 'rawvideo', '-vcodec', 'rawvideo', '-s', '720x720', '-pix_fmt', 
'rgba', '-r', '5', '-loglevel', 'error', '-i', 'pipe:', '-vcodec', 'h264', '-pix_fmt', 'yuv420p', '-b', '800k', '-y', 
'loss_animation_CNN_oneDataset.mp4']' returned non-zero exit status 1.
</module>


I tried to ignore the error by this answer but it seems it's not the case. I also checked similar case but its answer for getting a static git binary is not my cas as well since not especial converting PNG to MP4 !



My code is as follows :



plt.rcParams['animation.ffmpeg_path'] = '/usr/bin/ffmpeg'

def animate(i, data1, data2, line1, line2):
 temp1 = data1.iloc[:int(i+1)]
 temp2 = data2.iloc[:int(i+1)]

 line1.set_data(temp1.index, temp1.value)
 line2.set_data(temp2.index, temp2.value)

 return (line1, line2)


def create_loss_animation(model_type, data1, data2):
 fig = plt.figure()
 plt.title(f'Loss on Train & Test', fontsize=25)
 plt.xlabel('Epoch', fontsize=20)
 plt.ylabel('Loss MSE for Sx-Sy & Sxy', fontsize=20)
 plt.xlim(min(data1.index.min(), data2.index.min()), max(data1.index.max(), data2.index.max()))
 plt.ylim(min(data1.value.min(), data2.value.min()), max(data1.value.max(), data2.value.max()))

 l1, = plt.plot([], [], 'o-', label='Train Loss', color='b', markevery=[-1])
 l2, = plt.plot([], [], 'o-', label='Test Loss', color='r', markevery=[-1])
 plt.legend(loc='center right', fontsize='xx-large')

 Writer = animation.writers['ffmpeg']
 writer = Writer(fps=5, bitrate=1800)

 ani = matplotlib.animation.FuncAnimation(fig, animate, fargs=(data1, data2, l1, l2), repeat=True, interval=1000, repeat_delay=1000)
 ani.save(f'{model_type}.mp4', writer=writer)

# create datasets
x = np.linspace(0,150,50)
y1 = 41*np.exp(-x/20)
y2 = 35*np.exp(-x/50)

my_data_number_1 = pd.DataFrame({'x':x, 'value':y1}).set_index('x')
my_data_number_2 = pd.DataFrame({'x':x, 'value':y2}).set_index('x')

create_loss_animation('test', my_data_number_1, my_data_number_2)


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HTTP Header for Duration of a MP4 for HTML 5 video
9 mars 2014, par MustafaI am trying to stream MP4 video as it is encoded from a webserver. I believe I used the appropriate flags, but it is not working correctly. When I download the video from my stream and open it with VLC, it properly shows the duration. Since a socket is not seekable, I assume it writes the metadata to end ? My Chrome browser always shows 8 seconds duration. The first 8 seconds plays at the normal speed, but afterwards the pause button turns into play button and the video plays very fast, probably as fast as it is recieved. However the audio is played at normal speed. I tried
document.getElementById('myVid').duration = 20000but it is a readonly field.I wonder, is there anyway to explicitly state the duration in HTTP headers or in any other way ? I cannot find any documentation about it.
ffmpeg -i - -vcodec libx264 -acodec libvo_aacenc -ar 44100 -ac 2 -ab 128000 -f mp4 -movflags frag_keyframe+faststart pipe:1 -fflags +genpts -re -profile baseline -level 30 -preset fastTo close-voters, that thinks it is not programming related, I use it in my own server I coded, and I need to set the duration programatically via JavaScript or setting the HTTP header. I believe it may be related to both ffmpeg or http headers, that's why I posted it here.
app.get("/video/*", function(req,res){
res.writeHead(200, {
'Content-Type': 'video/mp4',
});
var dir = req.url.split("/").splice(2).join("/");
var buf = new Buffer(dir, 'base64');
var src = buf.toString();
var Transcoder = require('stream-transcoder');
var stream = fs.createReadStream(src);
// I added my own flags to this module, they are at below:
new Transcoder(stream)
.videoCodec('libx264')
.audioCodec("libvo_aacenc")
.sampleRate(44100)
.channels(2)
.audioBitrate(128 * 1000)
.format('mp4')
.on('finish', function() {
console.log("finished");
})
.stream().pipe(res);
});exec function in that stream-transcoder module,
a.push("-fflags");
a.push("+genpts");
a.push("-re");
a.push("-profile");
a.push("baseline");
a.push("-level");
a.push("30");
a.push("-preset");
a.push("fast");
a.push("-strict");
a.push("experimental");
a.push("-frag_duration");
a.push("" + 2 * (1000 * 1000));
var child = spawn('ffmpeg', a, {
cwd: os.tmpdir()
}); -
FFMPEG stops converting
19 février 2014, par user3328745I've got Ubuntu 12.04 LTS, which runs Wowza Media Server, so I use FFmpeg as a transcoder for live streaming and JWplayer on my website. But ffmpeg always stops converting, and I have to input the command again and again. So here is the command :
nohup ffmpeg -i rtsp://log:pass@<cameraip>:554/live1.sdp -ar 44100 -ab 128k -f flv -b 5000k -s 480x270 -y rtmp://<serverip>:1935/live/camera.stream &
</serverip></cameraip>And that's what i get
ffmpeg version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
built on Feb 6 2014 20:56:59 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[rtsp @ 0x25317a0] Estimating duration from bitrate, this may be inaccurate
Seems stream 0 codec frame rate differs from container frame rate: 150.00 (150/1) -> 1000.00 (1000/1)
Input #0, rtsp, from 'rtsp://log:pass@<cameraip>:554/live1.sdp':
Metadata:
title : RTSP/RTP stream 1 from DCS-2132L
comment : live1.sdp with v2.0
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0.0: Video: h264 (High), yuvj420p, 640x360 [PAR 1:1 DAR 16:9], 75 fps, 1k tbr, 90k tbn, 150 tbc
Stream #0.1: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
Incompatible pixel format 'yuvj420p' for codec 'mpeg4', auto-selecting format 'yuv420p'
[buffer @ 0x2539f80] w:640 h:360 pixfmt:yuvj420p
[scale @ 0x253a940] w:640 h:360 fmt:yuvj420p -> w:480 h:270 fmt:yuv420p flags:0x4
Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'
[ac3 @ 0x2531120] channel_layout not specified
[ac3 @ 0x2531120] No channel layout specified. The encoder will guess the layout, but it might be incorrect.
[ac3 @ 0x2531120] invalid bit rate
Output #0, avi, to 'rtmp://<serverip>:1935/live/camera.stream':
Stream #0.0: Video: mpeg4, yuv420p, 480x270 [PAR 1:1 DAR 16:9], q=2-31, 1024 kb/s, 90k tbn, 1k tbc
Stream #0.1: Audio: ac3, 22050 Hz, mono, flt, 1024 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height
</serverip></cameraip>Plese, help me to correct the errors
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