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  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 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 (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

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  • FFMPEG save udp stream to mp4 file

    17 juillet 2020, par DoriHp 0

    I'm facing some trouble when using ffmpeg to save an udp stream into a mp4 file. When receiving and playing with ffplay by this command

    


    ffplay -i udp://127.0.0.1:10000

    


    everything is ok, but when I save to mp4 file with this command

    


    ffmpeg -i udp://127.0.0.1:10000 -vcodec libx264 -an -pix_fmt yuv420p -r 20 test.mp4

    


    the created mp4 file has only 15 secs length but my streaming was 1 min. I found a solution

    


    ffmpeg -i udp://127.0.0.1:10000 -r 20 -filter:v "setpts=PTS*0.25" -vcodec libx264 -an -pix_fmt yuv420p test.mp4

    


    by using setpts video filter, but video's length still wasn't same as the stream.
My udp stream's properties, get by using ffprobe :

    


    [STREAM]                                          
index=0                                           
codec_name=h264                                   
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 
profile=High 4:4:4 Predictive                     
codec_type=video                                  
codec_time_base=1/40                              
codec_tag_string=[27][0][0][0]                    
codec_tag=0x001b                                  
width=1280                                        
height=720                                        
coded_width=1280                                  
coded_height=720                                  
closed_captions=0                                 
has_b_frames=0                                    
sample_aspect_ratio=N/A                           
display_aspect_ratio=N/A                          
pix_fmt=yuv444p                                   
level=31                                          
color_range=unknown                               
color_space=unknown                               
color_transfer=unknown                            
color_primaries=unknown                           
chroma_location=left                              
field_order=progressive                           
timecode=N/A                                      
refs=1                                            
is_avc=false                                      
nal_length_size=0                                 
id=0x100                                          
r_frame_rate=20/1                                 
avg_frame_rate=20/1                               
time_base=1/90000                                 
start_pts=420655500                               
start_time=4673.950000                            
duration_ts=N/A                                   
duration=N/A                                      
bit_rate=N/A                                      
max_bit_rate=N/A                                  
bits_per_raw_sample=8                             
nb_frames=N/A                                     
nb_read_frames=N/A                                
nb_read_packets=N/A                               
DISPOSITION:default=0                             
DISPOSITION:dub=0                                 
DISPOSITION:original=0                            
DISPOSITION:comment=0                             
DISPOSITION:lyrics=0                              
DISPOSITION:karaoke=0                             
DISPOSITION:forced=0                              
DISPOSITION:hearing_impaired=0                    
DISPOSITION:visual_impaired=0                     
DISPOSITION:clean_effects=0                       
DISPOSITION:attached_pic=0                        
DISPOSITION:timed_thumbnails=0                    
[/STREAM]                                         
[FORMAT]                                          
filename=udp://127.0.0.1:10000                    
nb_streams=1                                      
nb_programs=1                                     
format_name=mpegts                                
format_long_name=MPEG-TS (MPEG-2 Transport Stream)
start_time=4673.950000                            
duration=N/A                                      
size=N/A                                          
bit_rate=N/A                                      
probe_score=50                                    
[/FORMAT]                                         


    


  • Revision 4cc7c5a17f : Totally remove prev_mi in VP9 decoder. This will save the memory and improve th

    3 novembre 2014, par hkuang

    Changed Paths :
     Modify /vp9/common/vp9_alloccommon.c


     Modify /vp9/common/vp9_alloccommon.h


     Modify /vp9/common/vp9_entropymode.c


     Modify /vp9/common/vp9_onyxc_int.h


     Modify /vp9/decoder/vp9_decoder.c


     Modify /vp9/encoder/vp9_encoder.c



    Totally remove prev_mi in VP9 decoder.

    This will save the memory and improve the decode speed due to
    removing unnecessary memset of big prev_mi array for
    all the key frames.

    Decoding a all key frames 1080p video shows speed improve around 2%.

    Change-Id : I6284a445c1291056e3c15135c3c20d502f791c10

  • Cannot save animation in matplotlib : Windows permission denied

    13 mai 2015, par Vladimir

    I’ve been trying for a day long to sort this out, checking similar threads but with no success.
    Stretch’s Cannot save matplotlib animation with ffmpeg helped with previous errors (I had ffmpeg path wrong), but I kept getting Access denied after fixing it.

    My ffmpeg binary is on C:\ffmpeg\bin

    A nice alternative would be to able to export gif files, but I keep getting an ascii error with imagemagick. I think both problems are related, so I wanted to sort out the ffmpeg first.

    I think the problem might have to do with the fact I’m working with Canopy (in Windows 8 64bit), which pretty much hegemonized my path variable and broke some things along the way (e.g. I can’t open IDLE since I installed Canopy, didn’t tried to fix that yet). As I fixed things along the way I found at least 3 distinct path variables, all of which I updated : windows advanced settings path (set manually), windows console path (set via console with setx), and sys.path (set or checked at runtime), adding ";C:\ffmpeg\bin", where ffmpeg effectively is. Regardless I sort out the problem or not, I would like to learn which of these environment variables are relevant for what, I find it very confusing.

    The code is the following :

    # -*- coding: utf-8 -*-
    import sys
    import numpy as np
    from matplotlib import pyplot as plt
    from matplotlib import animation
    plt.rcParams['animation.ffmpeg_path'] = r'C:\ffmpeg\bin'
    if r'C:\ffmpeg\bin' not in sys.path: sys.path.append(r'C:\ffmpeg\bin')

    fig = plt.figure()
    ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
    line, = ax.plot([], [], lw=2)

    def init():
       line.set_data([], [])
       return line,

    def animate(i):
       x = np.linspace(0, 2, 1000)
       y = np.sin(2 * np.pi * (x - 0.01 * i))
       line.set_data(x, y)
       return line,

    anim = animation.FuncAnimation(fig, animate, init_func=init, frames=200, interval=20, blit=True)
    plt.show()

    # This case generates Windows err: Access Denied
    FFwriter = animation.FFMpegWriter()
    # anim.save(r'C:\basic_animation.mp4', writer = FFwriter, fps=30)

    # This case generates UnicodeDecodeError:'ascii' codec can't decode byte 0xa0 in position 3
    # anim.save(r'C:\animation.gif', writer='imagemagick', fps=30)

    The traceback for anim.save(r'C:\basic_animation.mp4', writer = FFwriter, fps=30) :

    %run "C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py"
    ---------------------------------------------------------------------------
    WindowsError                              Traceback (most recent call last)
    C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py in <module>()
        27 # This case generates Windows err: Access Denied
        28 FFwriter = animation.FFMpegWriter()
    ---> 29 anim.save(r'C:\basic_animation.mp4', writer = FFwriter, fps=30)
        30
        31 # This case generates UnicodeDecodeError:'ascii' codec can't decode byte 0xa0 in position 3

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs)
       759         # since GUI widgets are gone. Either need to remove extra code to
       760         # allow for this non-existant use case or find a way to make it work.
    --> 761         with writer.saving(self._fig, filename, dpi):
       762             for data in zip(*[a.new_saved_frame_seq()
       763                               for a in all_anim]):

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.5.2.2785.win-x86_64\lib\contextlib.pyc in __enter__(self)
        15     def __enter__(self):
        16         try:
    ---> 17             return self.gen.next()
        18         except StopIteration:
        19             raise RuntimeError("generator didn't yield")

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in saving(self, *args)
       184         '''
       185         # This particular sequence is what contextlib.contextmanager wants
    --> 186         self.setup(*args)
       187         yield
       188         self.finish()

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in setup(self, fig, outfile, dpi, *args)
       174         # Run here so that grab_frame() can write the data to a pipe. This
       175         # eliminates the need for temp files.
    --> 176         self._run()
       177
       178     @contextlib.contextmanager

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in _run(self)
       202                                       stdout=output, stderr=output,
       203                                       stdin=subprocess.PIPE,
    --> 204                                       creationflags=subprocess_creation_flags)
       205
       206     def finish(self):

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.5.2.2785.win-x86_64\lib\subprocess.pyc in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags)
       707                                 p2cread, p2cwrite,
       708                                 c2pread, c2pwrite,
    --> 709                                 errread, errwrite)
       710         except Exception:
       711             # Preserve original exception in case os.close raises.

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.5.2.2785.win-x86_64\lib\subprocess.pyc in _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
       955                                          env,
       956                                          cwd,
    --> 957                                          startupinfo)
       958             except pywintypes.error, e:
       959                 # Translate pywintypes.error to WindowsError, which is

    WindowsError: [Error 5] Acceso denegado
    </module>

    The traceback for anim.save(r'C:\animation.gif', writer='imagemagick', fps=30) :

    In [8]: %run "C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py"
    ---------------------------------------------------------------------------
    UnicodeDecodeError                        Traceback (most recent call last)
    C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py in <module>()
        30
        31 # This case generates UnicodeDecodeError:'ascii' codec can't decode byte 0xa0 in position 3
    ---> 32 anim.save(r'C:\animation.gif', writer='imagemagick', fps=30)

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs)
       765                     # TODO: Need to see if turning off blit is really necessary
       766                     anim._draw_next_frame(d, blit=False)
    --> 767                 writer.grab_frame(**savefig_kwargs)
       768
       769         # Reconnect signal for first draw if necessary

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in grab_frame(self, **savefig_kwargs)
       225             verbose.report('MovieWriter -- Error '
       226                            'running proc:\n%s\n%s' % (out,
    --> 227                                                       err), level='helpful')
       228             raise
       229

    UnicodeDecodeError: 'ascii' codec can't decode byte 0xa0 in position 3: ordinal not in range(128)
    </module>

    Stared at them for a while.

    Thanks for your time !

    UPDATE : I followed the steps in this post for granting access to both C :\ffmpeg and destination folder, but no luck :(