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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

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • 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 (...)

Sur d’autres sites (9643)

  • Revision 730cdefd3e : Add SVC codec control to set frame flags and buffer indices. Add SVC codec cont

    2 septembre 2015, par Marco

    Changed Paths :
     Modify /examples/vp9_spatial_svc_encoder.c


     Modify /vp9/encoder/vp9_svc_layercontext.c


     Modify /vp9/encoder/vp9_svc_layercontext.h


     Modify /vp9/vp9_cx_iface.c


     Modify /vpx/src/svc_encodeframe.c


     Modify /vpx/vp8cx.h



    Add SVC codec control to set frame flags and buffer indices.

    Add SVC codec control to set the frame flags and buffer indices
    for each spatial layer of the current (super)frame to be encoded.
    This allows the application to set (and change on the fly) the
    reference frame configuration for spatial layers.

    Added an example layer pattern (spatial and temporal layers)
    in vp9_spatial_svc_encoder for the bypass_mode using new control.

    Change-Id : I05f941897cae13fb9275b939d11f93941cb73bee

  • ffmpeg audio output in iOS

    19 septembre 2015, par user3249421

    Good day,

    I have own project which using iFrameExtraktor (https://github.com/lajos/iFrameExtractor). I modified initWithVideo method to :

    -(id)initWithVideo:(NSString *)moviePath imgView: (UIImageView *)imgView {
    
if (!(self=[super init])) return nil;
    

    
AVCodec         *pCodec;
    
AVCodec         *aCodec;
    

    
// Register all formats and codecs
    
avcodec_register_all();
    
av_register_all();
    

    
imageView = imgView;
    

    
// Open video file
    
if(avformat_open_input(&pFormatCtx, [moviePath cStringUsingEncoding:NSASCIIStringEncoding], NULL, NULL) != 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Couldn't open file\n");
    
    goto initError;
    
}
    

    
// Retrieve stream information
    
if(avformat_find_stream_info(pFormatCtx,NULL) < 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Couldn't find stream information\n");
    
    goto initError;
    
}
    

    
// Find the first video stream
    
if ((videoStream =  av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_VIDEO, -1, -1, &pCodec, 0)) < 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Cannot find a video stream in the input file\n");
    
    goto initError;
    
}
    

    
if((audioStream = av_find_best_stream(pFormatCtx, AVMEDIA_TYPE_AUDIO, -1, -1, &aCodec, 0)) < 0 ){
    
    av_log(NULL, AV_LOG_ERROR, "Cannot find a audio stream in the input file\n");
    
    goto initError;
    
}
    

    
// Get a pointer to the codec context for the video stream
    
pCodecCtx = pFormatCtx->streams[videoStream]->codec;
    
aCodecCtx = pFormatCtx->streams[audioStream]->codec;
    

    
// Find the decoder for the video stream
    
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
    
if(pCodec == NULL) {
    
    av_log(NULL, AV_LOG_ERROR, "Unsupported video codec!\n");
    
    goto initError;
    
}
    

    
aCodec = avcodec_find_decoder(aCodecCtx->codec_id);
    
if(aCodec == NULL) {
    
    av_log(NULL, AV_LOG_ERROR, "Unsupported audio codec!\n");
    
    goto initError;
    
}
    

    
// Open codec
    
if(avcodec_open2(pCodecCtx, pCodec, NULL) < 0) {
    
    av_log(NULL, AV_LOG_ERROR, "Cannot open video decoder\n");
    
    goto initError;
    
}
    

    
if(avcodec_open2(aCodecCtx, aCodec, NULL) < 0){
    
    av_log(NULL, AV_LOG_ERROR, "Cannot open audio decoder\n");
    
    goto initError;
    
}
    

    
// Allocate video frame
    
pFrame = av_frame_alloc();
    

    
outputWidth = pCodecCtx->width;
    
self.outputHeight = pCodecCtx->height;
    

    
lastFrameTime = -1;
    
[self seekTime:0.0];
    

    
return self;
    

    
initError:
    
    //[self release];
    
    return nil;
    
}

    Video rendering works fine, but I don’t know how play audio to device output.

    Thanks for any tips.

  • FFmpeg : Concatenating two huffyuv codec files in .avi container causing first video to be fine but other video is just static

    15 octobre 2015, par roy

    I have two .avi video files that I am trying to concat together.

    I have a files.txt that has in it :

    file './1_tmp.avi'
    
file './2_tmp.avi'

    FFprobe for 1_tmp.avi gives me :

    ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
    
  built with gcc 4.8.5 (Gentoo 4.8.5 p1.3, pie-0.6.2)
    
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags=' ' --disable-static --enable-avfilter --enable-avresample --disable-stripping --enable-version3 --disable-indev=v4l2 --disable-outdev=v4l2 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --disable-outdev=sdl --enable-nonfree --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-doc --disable-gnutls --enable-gpl --enable-hardcoded-tables --enable-iconv --disable-lzma --enable-network --disable-openssl --enable-postproc --disable-libsmbclient --disable-ffplay --disable-vaapi --disable-vdpau --enable-xlib --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable-openal --disable-opengl --disable-libv4l2 --disable-libpulse --disable-libopencore-amrwb --disable-libopencore-amrnb --enable-libfdk-aac --disable-libopenjpeg --disable-libbluray --disable-libcelt --disable-libgme --disable-libgsm --disable-libmodplug --disable-libopus --disable-libquvi --disable-librtmp --disable-libssh --disable-libschroedinger --disable-libspeex --disable-libvorbis --enable-libvpx --disable-libzvbi --disable-libbs2b --disable-libflite --disable-frei0r --disable-libfribidi --disable-fontconfig --disable-ladspa --disable-libass --disable-libfreetype --disable-libsoxr --enable-pthreads --enable-libvo-aacenc --disable-libvo-amrwbenc --enable-libmp3lame --disable-libaacplus --disable-libfaac --disable-libtheora --disable-libtwolame --disable-libwavpack --disable-libwebp --enable-libx264 --disable-libx265 --disable-libxvid --enable-x11grab --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=core-avx-i
    
  libavutil      54. 27.100 / 54. 27.100
    
  libavcodec     56. 41.100 / 56. 41.100
    
  libavformat    56. 36.100 / 56. 36.100
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 16.101 /  5. 16.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.100 /  1.  2.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, avi, from '1_tmp.avi':
    
  Metadata:
    
    encoder         : Lavf56.36.100
    
  Duration: 00:00:19.00, start: 0.000000, bitrate: 179869 kb/s
    
    Stream #0:0: Video: huffyuv (HFYU / 0x55594648), bgr0, 1024x768, 180390 kb/s, 18 fps, 18 tbr, 18 tbn, 18 tbc

    and for 2_tmp.avi :

    ffprobe version 2.7.2 Copyright (c) 2007-2015 the FFmpeg developers
    
  built with gcc 4.8.5 (Gentoo 4.8.5 p1.3, pie-0.6.2)
    
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags=' ' --disable-static --enable-avfilter --enable-avresample --disable-stripping --enable-version3 --disable-indev=v4l2 --disable-outdev=v4l2 --disable-indev=oss --disable-indev=jack --disable-outdev=oss --disable-outdev=sdl --enable-nonfree --enable-bzlib --disable-runtime-cpudetect --disable-debug --disable-doc --disable-gnutls --enable-gpl --enable-hardcoded-tables --enable-iconv --disable-lzma --enable-network --disable-openssl --enable-postproc --disable-libsmbclient --disable-ffplay --disable-vaapi --disable-vdpau --enable-xlib --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --enable-zlib --disable-libcdio --disable-libiec61883 --disable-libdc1394 --disable-libcaca --disable-openal --disable-opengl --disable-libv4l2 --disable-libpulse --disable-libopencore-amrwb --disable-libopencore-amrnb --enable-libfdk-aac --disable-libopenjpeg --disable-libbluray --disable-libcelt --disable-libgme --disable-libgsm --disable-libmodplug --disable-libopus --disable-libquvi --disable-librtmp --disable-libssh --disable-libschroedinger --disable-libspeex --disable-libvorbis --enable-libvpx --disable-libzvbi --disable-libbs2b --disable-libflite --disable-frei0r --disable-libfribidi --disable-fontconfig --disable-ladspa --disable-libass --disable-libfreetype --disable-libsoxr --enable-pthreads --enable-libvo-aacenc --disable-libvo-amrwbenc --enable-libmp3lame --disable-libaacplus --disable-libfaac --disable-libtheora --disable-libtwolame --disable-libwavpack --disable-libwebp --enable-libx264 --disable-libx265 --disable-libxvid --enable-x11grab --disable-amd3dnow --disable-amd3dnowext --disable-fma4 --disable-xop --cpu=core-avx-i
    
  libavutil      54. 27.100 / 54. 27.100
    
  libavcodec     56. 41.100 / 56. 41.100
    
  libavformat    56. 36.100 / 56. 36.100
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 16.101 /  5. 16.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.100 /  1.  2.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, avi, from '2_tmp.avi':
    
  Metadata:
    
    encoder         : Lavf56.36.100
    
  Duration: 00:00:56.00, start: 0.000000, bitrate: 160560 kb/s
    
    Stream #0:0: Video: huffyuv (HFYU / 0x55594648), bgr0, 1024x768, 160714 kb/s, 18 fps, 18 tbr, 18 tbn, 18 tbc

    There are only video streams, they look to be the same codecs/fps

    I am using this command to concatenate them :

    ffmpeg -f concat -i files.txt -c:v copy -y output.avi

    I don’t get any output from the terminal and it outputs a file.

    The file opens and the content in 1_tmp.avi plays fine, at the same quality, but when it gets to the point in the video where 2_tmp.avi should be, it’s pixelated static all the way through (see image below).

    static screen for second file after concatentation - mama **did not** say there would be days like this.

    If I use a command like :

    ffmpeg -i 1_tmp.avi -i 2_tmp.avi -filter_complex "[0:0] [1:0] concat=n=2:v=1 [v]" -map "[v]" output.avi

    I do get full output of both videos merged together, but it is dropped to an mpeg codec and the quality loss is noticeably prominent.

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