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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP 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 (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

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  • Animated line chart with pandas, matplotlib and ffmpeg

    10 avril 2020, par Mark K

    In producing an animated line chart, I have below data and codes.

    



    But when the chart produced, it shows no line. What did I do wrong ?

    



    Thank you.

    



    import numpy as np
import pandas as pd
import seaborn as sns
import matplotlib
import matplotlib.pyplot as plt
import matplotlib.animation as animation

title = 'Heroin Overdoses'

data = {'Year' : ["1999","2000","2001","2002","2003","2004","2005","2006","2007","2008","2009","2010","2011","2012","2013","2014","2015","2016"], 
'Heroin Overdoses' : [280,443,413,486,475,148,197,170,448,103,137,160,483,356,352,300,466,278]}
overdose = pd.DataFrame(data)

Writer = animation.writers['ffmpeg']
writer = Writer(fps=20, metadata=dict(artist='Me'), bitrate=1800)

fig = plt.figure(figsize=(10,6))
plt.xlim(1999, 2016)
plt.ylim(np.min(overdose)[0], np.max(overdose)[0])
plt.xlabel('Year',fontsize=20)
plt.ylabel(title,fontsize=20)
plt.title('Heroin Overdoses per Year',fontsize=20)

def animate(i):
    data = overdose.iloc[:int(i+1)] #select data range
    p = sns.lineplot(x=data.index, y=data[title], data=data, color="r")
    p.tick_params(labelsize=17)
    plt.setp(p.lines,linewidth=7)

ani = matplotlib.animation.FuncAnimation(fig, animate, frames=17, repeat=True)

ani.save('C:\\folder\\line chart.mp4', writer=writer)


    


  • aarch64 : hevc : Produce epel_uni_w_hv functions for both neon and i8mm

    20 mars 2024, par Martin Storsjö
    aarch64 : hevc : Produce epel_uni_w_hv functions for both neon and i8mm

    AWS Graviton 3 :
    
put_hevc_epel_uni_w_hv4_8_c : 191.2
    
put_hevc_epel_uni_w_hv4_8_neon : 87.7
    
put_hevc_epel_uni_w_hv4_8_i8mm : 83.2
    
put_hevc_epel_uni_w_hv6_8_c : 349.5
    
put_hevc_epel_uni_w_hv6_8_neon : 153.0
    
put_hevc_epel_uni_w_hv6_8_i8mm : 148.5
    
put_hevc_epel_uni_w_hv8_8_c : 581.2
    
put_hevc_epel_uni_w_hv8_8_neon : 166.7
    
put_hevc_epel_uni_w_hv8_8_i8mm : 163.5
    
put_hevc_epel_uni_w_hv12_8_c : 1230.0
    
put_hevc_epel_uni_w_hv12_8_neon : 387.7
    
put_hevc_epel_uni_w_hv12_8_i8mm : 370.2
    
put_hevc_epel_uni_w_hv16_8_c : 2003.2
    
put_hevc_epel_uni_w_hv16_8_neon : 501.5
    
put_hevc_epel_uni_w_hv16_8_i8mm : 490.2
    
put_hevc_epel_uni_w_hv24_8_c : 4448.7
    
put_hevc_epel_uni_w_hv24_8_neon : 1092.2
    
put_hevc_epel_uni_w_hv24_8_i8mm : 1069.7
    
put_hevc_epel_uni_w_hv32_8_c : 7817.2
    
put_hevc_epel_uni_w_hv32_8_neon : 1916.2
    
put_hevc_epel_uni_w_hv32_8_i8mm : 1829.5
    
put_hevc_epel_uni_w_hv48_8_c : 16728.2
    
put_hevc_epel_uni_w_hv48_8_neon : 4263.7
    
put_hevc_epel_uni_w_hv48_8_i8mm : 4342.7
    
put_hevc_epel_uni_w_hv64_8_c : 29563.2
    
put_hevc_epel_uni_w_hv64_8_neon : 7474.2
    
put_hevc_epel_uni_w_hv64_8_i8mm : 7128.5
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libavcodec/aarch64/hevcdsp_epel_neon.S
    • [DH] libavcodec/aarch64/hevcdsp_init_aarch64.c

  • Artifact while streaming multicast with ffmpeg

    17 août 2018, par Nicosmik

    Locally, from my windows machine with ffmpeg 3.3.2 from Zeranoe

    ffmpeg version 3.2.2 Copyright (c) 2003-2016 the FFmpeg developers
    built with gcc 5.4.0 (GCC)
    configuration : —enable-gpl
    —enable-version3 —enable-dxva2 —enable-libmfx —enable-nvenc —enable-avisynth —enable-bzlib —enable-fontconfig —enable-frei0r —enable-gnutls —enable-iconv —enable-libass —enable-libbluray —enable-libbs2b —enable-libcaca —enable-libfreetype —enable-libgme —enable-libgsm —enable-libilbc —enable-libmodplug —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenh264 —enable-libopenjpeg —enable-libopus —enable-librtmp —enable-libsnappy —enable-libsoxr —enable-libspeex —enable-libtheora —enable-libtwolame —enable-libvidstab —enable-libvo-amrwbenc —enable-libvorbis —enable-libvpx —enable-libwavpack —enable-libwebp —enable-libx264 —enable-libx265 —enable-libxavs —enable-libxvid —enable-libzimg —enable-lzma —enable-decklink —enable-zlib

    Server side

    Launch udp multicast streaming.

     ffmpeg -re -i video.ts -an -f mpegts -c copy udp://224.1.1.1:5000

    Client side

    Playing with ffplay is correct, no artifacts displayed

    ffplay udp://224.1.1.1:5000

    Playing after decoding cause artifacts

    ffmpeg -i udp://224.1.1.1:5000 -pix_fmt gray -f avi - | ffplay -

    or

    ffmpeg -f mpegts -i udp://224.1.1.1:5000 -pix_fmt gray -c:v rawvideo -f avi out.avi

    Does someone has an explanation ?

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