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Autres articles (14)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • L’agrémenter visuellement

    10 avril 2011

    MediaSPIP est basé sur un système de thèmes et de squelettes. Les squelettes définissent le placement des informations dans la page, définissant un usage spécifique de la plateforme, et les thèmes l’habillage graphique général.
    Chacun peut proposer un nouveau thème graphique ou un squelette et le mettre à disposition de la communauté.

  • 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 (...)

Sur d’autres sites (3530)

  • compile ffmpeg decode only without audio codecs

    28 juillet 2016, par Rob

    I work on a media manager and use ffmpeg.exe to extract screenshots.
    With the latest size of ffmpeg.exe exceeding 35MB, I am attempting to build ffmpeg without the majority of its functions, to allow only saving of a frame of video.

    I had thought disabling many of the filters, Audio Codecs etc would shrink the size of ffmpeg to something more manageable.

    Following this guide
    https://pracucci.com/compile-ffmpeg-on-windows-with-visual-studio-compiler.html
    to allow building of ffmpeg using Visual Studio 2015, I have come to the part of ./configuration and hit a wall.
    With so many options and no idea what all of them mean or do, I am asking if someone in the community can give me laymans instructions.

    I also know that I need to build x264, and possible x265 (HEVC), but am not sure if there is anything other codecs needed.
    In the end, I and am hoping to just have the one file, ffmpeg.exe for use in the media manager project.

    The code I use to get a screenshot is as follows

    Public Shared Function CreateScreenShot(ByVal FullPathAndFilename As String, ByVal SavePath As String, ByVal sec As Integer, Optional ByVal Overwrite As Boolean = False) As Boolean
       If Not File.Exists(SavePath) Or Overwrite Then
           Try
               IO.File.Delete(SavePath)
           Catch
               Return False
           End Try
           If IO.File.Exists(FullPathAndFilename) Then
               Dim myProcess As Process = New Process
               Try
                   Dim seconds As Integer = sec
                   myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
                   myProcess.StartInfo.CreateNoWindow = False
                   myProcess.StartInfo.FileName = Utilities.applicationPath & "\Assets\ffmpeg.exe"
                   Dim proc_arguments As String = "-ss " & seconds.ToString & " -i """ & FullPathAndFilename & """ -vframes:v 1 -an " & """" & SavePath & """"
                   myProcess.StartInfo.Arguments = proc_arguments
                   myProcess.Start()
                   myProcess.WaitForExit()
                   If File.Exists(SavePath) Then Return True
               Catch ex As Exception
                   Throw ex
               Finally
                   myProcess.Close()
               End Try
           End If
       End If
       Return False
    End Function

    I hope this is sufficient information, and appreciated any help or suggestions.

  • Getting 'av_interleaved_write_frame() : Broken pipe' error

    2 juillet 2016, par Poornan

    I am trying this blog post.I am new to python, numpy as well as FFMPEG. I could not figure out what causes this issue.

    http://zulko.github.io/blog/2013/09/27/read-and-write-video-frames-in-python-using-ffmpeg/

    here is the code :

    import subprocess as sp
    import numpy

    print ("Hello World!");
    FFMPEG_BIN = "ffmpeg" # on Linux ans Mac OS
    #FFMPEG_BIN = "ffmpeg.exe" # on Windows

    command = [ FFMPEG_BIN,
               '-i', '/Users/eananthaneshan/Movies/myvideo.mp4',
               '-f', 'image2pipe',
               '-pix_fmt', 'yuv444p',
               '-s', '420x360',
               '-r', '24',
               '-vcodec', 'h264', '-']
    pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=-1)

    # read 420*360*3 bytes (= 1 frame)
    raw_image = pipe.stdout.read(420*360*3)
    # transform the byte read into a numpy array
    image =  numpy.fromstring(raw_image, dtype='uint8')
    image = image.reshape((360,420,3)   )
    # throw away the data in the pipe's buffer.
    pipe.stdout.flush()

    This is the output :

    ffmpeg version 2.8 Copyright (c) 2000-2015 the FFmpeg developers
     built with Apple LLVM version 7.0.0 (clang-700.0.72)
     configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.2_1/include/openjpeg-1.5 ' --enable-nonfree --enable-vda
     libavutil      54. 31.100 / 54. 31.100
     libavcodec     56. 60.100 / 56. 60.100
     libavformat    56. 40.101 / 56. 40.101
     libavdevice    56.  4.100 / 56.  4.100
     libavfilter     5. 40.101 /  5. 40.101
     libavresample   2.  1.  0 /  2.  1.  0
     libswscale      3.  1.101 /  3.  1.101
     libswresample   1.  2.101 /  1.  2.101
     libpostproc    53.  3.100 / 53.  3.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/eananthaneshan/Movies/myvideo.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 1
       compatible_brands: isom
       creation_time   : 2014-04-07 02:02:31
     Duration: 01:00:10.03, start: 0.000000, bitrate: 1024 kb/s
       Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 111 kb/s (default)
       Metadata:
         creation_time   : 2014-04-07 02:02:31
         handler_name    : GPAC ISO Audio Handler
       Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/unknown/unknown), 720x404, 909 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
       Metadata:
         creation_time   : 2014-04-07 01:14:58
         handler_name    : L-SMASH Video Media Handler
         encoder         : AVC Coding
    Output #0, image2pipe, to 'pipe:':
     Metadata:
       major_brand     : isom
       minor_version   : 1
       compatible_brands: isom
       encoder         : Lavf56.40.101
       Stream #0:0(und): Video: rawvideo (444P / 0x50343434), yuv444p, 420x360, q=2-31, 200 kb/s, 23.98 fps, 23.98 tbn, 23.98 tbc (default)
       Metadata:
         creation_time   : 2014-04-07 01:14:58
         handler_name    : L-SMASH Video Media Handler
         encoder         : Lavc56.60.100 rawvideo
    Stream mapping:
     Stream #0:1 -> #0:0 (h264 (native) -> rawvideo (native))
    Press [q] to stop, [?] for help
    av_interleaved_write_frame(): Broken pipe
    frame=    2 fps=0.0 q=-0.0 Lsize=     886kB time=00:00:00.08 bitrate=87003.8kbits/s    
    video:886kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
    Conversion failed!
  • avcodec/utils : only warn when passed invalid lowres value

    5 août 2016, par Aman Gupta
    avcodec/utils : only warn when passed invalid lowres value
    

    This makes it easier to use the lowres option when dealing with input
    files in different codecs. If the codec doesn’t support lowres=1 for
    instance, it will throw a warning and use lowres=0 instead of erroring
    out completely.

    Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>

    • [DH] libavcodec/utils.c