Recherche avancée

Médias (1)

Mot : - Tags -/Christian Nold

Autres articles (57)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

Sur d’autres sites (8904)

  • Applying filter complex fails with something related to audio

    18 septembre 2014, par Alin

    I finally managed to build ffmpeg as detailed in here : https://enoent.fr/blog/2014/06/20/compile-ffmpeg-for-android/ and in the end, I have a ffmpeg library which accepts command arguments.

    I am trying to apply a watermark image over the video so for it I am using preparing this ffmpeg command :

    ffmpeg -i input.avi -i logo.png -filter_complex 'overlay=10:main_h-overlay_h-10' output.avi

    I have first tried it on windows using ffmpeg.exe and the result was as expected.

    I have tried it on android using the compiled android and the output is as follows :

    09-17 22:03:34.455: I/Videokit(18419): Loading native library compiled at 22:33:10 Sep 15 2014
    
09-17 22:03:34.455: I/Videokit(18419): Option: ffmpeg
    
09-17 22:03:34.455: I/Videokit(18419): Option: -loglevel
    
09-17 22:03:34.455: I/Videokit(18419): Option: debug
    
09-17 22:03:34.455: I/Videokit(18419): Option: -i
    
09-17 22:03:34.455: I/Videokit(18419): Option: /storage/emulated/0/vid.mp4
    
09-17 22:03:34.455: I/Videokit(18419): Option: -i
    
09-17 22:03:34.455: I/Videokit(18419): Option: /storage/emulated/0/logo.png
    
09-17 22:03:34.455: I/Videokit(18419): Option: -qscale:v
    
09-17 22:03:34.455: I/Videokit(18419): Option: 1
    
09-17 22:03:34.455: I/Videokit(18419): Option: -filter_complex
    
09-17 22:03:34.455: I/Videokit(18419): Option: overlay=10:main_h-overlay_h-10
    
09-17 22:03:34.455: I/Videokit(18419): Option: /storage/emulated/0/outVid.mp4
    
09-17 22:03:34.455: I/Videokit(18419): Running main
    
09-17 22:03:34.463: D/Videokit(18419): Splitting the commandline.
    
09-17 22:03:34.463: D/Videokit(18419): Reading option '-loglevel' ...
    
09-17 22:03:34.463: D/Videokit(18419):  matched as option 'loglevel' (set logging level) with argument 'debug'.
    
09-17 22:03:34.463: D/Videokit(18419): Reading option '-i' ...
    
09-17 22:03:34.463: D/Videokit(18419):  matched as input file with argument '/storage/emulated/0/vid.mp4'.
    
09-17 22:03:34.463: D/Videokit(18419): Reading option '-i' ...
    
09-17 22:03:34.463: D/Videokit(18419):  matched as input file with argument '/storage/emulated/0/logo.png'.
    
09-17 22:03:34.463: D/Videokit(18419): Reading option '-qscale:v' ...
    
09-17 22:03:34.463: D/Videokit(18419):  matched as option 'qscale' (use fixed quality scale (VBR)) with argument '1'.
    
09-17 22:03:34.463: D/Videokit(18419): Reading option '-filter_complex' ...
    
09-17 22:03:34.463: D/Videokit(18419):  matched as option 'filter_complex' (create a complex filtergraph) with argument 'overlay=10:main_h-overlay_h-10'.
    
09-17 22:03:34.463: D/Videokit(18419): Reading option '/storage/emulated/0/outVid.mp4' ...
    
09-17 22:03:34.463: D/Videokit(18419):  matched as output file.
    
09-17 22:03:34.463: D/Videokit(18419): Finished splitting the commandline.
    
09-17 22:03:34.463: D/Videokit(18419): Parsing a group of options: global .
    
09-17 22:03:34.463: D/Videokit(18419): Applying option loglevel (set logging level) with argument debug.
    
09-17 22:03:34.463: D/Videokit(18419): Applying option filter_complex (create a complex filtergraph) with argument overlay=10:main_h-overlay_h-10.
    
09-17 22:03:34.463: D/Videokit(18419): Successfully parsed a group of options.
    
09-17 22:03:34.463: D/Videokit(18419): Parsing a group of options: input file /storage/emulated/0/vid.mp4.
    
09-17 22:03:34.463: D/Videokit(18419): Successfully parsed a group of options.
    
09-17 22:03:34.463: D/Videokit(18419): Opening an input file: /storage/emulated/0/vid.mp4.
    
09-17 22:03:34.612: D/Videokit(18419): Successfully opened the file.
    
09-17 22:03:34.612: D/Videokit(18419): Parsing a group of options: input file /storage/emulated/0/logo.png.
    
09-17 22:03:34.612: D/Videokit(18419): Successfully parsed a group of options.
    
09-17 22:03:34.612: D/Videokit(18419): Opening an input file: /storage/emulated/0/logo.png.
    
09-17 22:03:34.620: D/Videokit(18419): Successfully opened the file.
    
09-17 22:03:34.620: D/Videokit(18419): Parsing a group of options: output file /storage/emulated/0/outVid.mp4.
    
09-17 22:03:34.620: D/Videokit(18419): Applying option qscale:v (use fixed quality scale (VBR)) with argument 1.
    
09-17 22:03:34.620: D/Videokit(18419): Successfully parsed a group of options.
    
09-17 22:03:34.620: D/Videokit(18419): Opening an output file: /storage/emulated/0/outVid.mp4.
    
09-17 22:03:34.627: D/Videokit(18419): Successfully opened the file.
    
09-17 22:03:34.643: I/Videokit(18419): Conversion failed!
    
09-17 22:03:34.643: I/Videokit(18419): Stream mapping:
    
09-17 22:03:34.643: E/Videokit(18419): Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

    The problem is Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height and this is somehow related to audio of the file. I have removed the audio and I get no error.

    ffmpeg -i vid.mp4 returns this :

    Command line:
    
ffmpeg -i vid.mp4 -report
    
ffmpeg version N-66278-g91459bd Copyright (c) 2000-2014 the FFmpeg developers
    
  built on Sep 14 2014 22:05:07 with gcc 4.8.3 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --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-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
    
  libavutil      54.  7.100 / 54.  7.100
    
  libavcodec     56.  1.100 / 56.  1.100
    
  libavformat    56.  4.101 / 56.  4.101
    
  libavdevice    56.  0.100 / 56.  0.100
    
  libavfilter     5.  1.100 /  5.  1.100
    
  libswscale      3.  0.100 /  3.  0.100
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  0.100 / 53.  0.100
    
Splitting the commandline.
    
Reading option '-i' ... matched as input file with argument 'vid.mp4'.
    
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
    
Finished splitting the commandline.
    
Parsing a group of options: global .
    
Applying option report (generate a report) with argument 1.
    
Successfully parsed a group of options.
    
Parsing a group of options: input file vid.mp4.
    
Successfully parsed a group of options.
    
Opening an input file: vid.mp4.
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 040e38c0] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 040e38c0] ISO: File Type Major Brand: isom
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 040e38c0] Before avformat_find_stream_info() pos: 19279 bytes read:32768 seeks:0
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 040e38c0] All info found
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 040e38c0] After avformat_find_stream_info() pos: 41952 bytes read:65536 seeks:0 frames:2
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'vid.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf55.19.104
    
  Duration: 00:00:14.58, start: 0.023222, bitrate: 1250 kb/s
    
    Stream #0:0(und), 1, 1/11988: Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x640 [SAR 1:1 DAR 1:1], 1099 kb/s, 29.97 fps, 29.97 tbr, 11988 tbn, 59.94 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und), 1, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 97 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
    Stream #0:2(eng), 0, 1/90000: Data: none (rtp  / 0x20707472), 39 kb/s
    
    Metadata:
    
      handler_name    : HintHandler
    
    Stream #0:3(eng), 0, 1/44100: Data: none (rtp  / 0x20707472), 8 kb/s
    
    Metadata:
    
      handler_name    : HintHandler
    
Successfully opened the file.
    
At least one output file must be specified
    
[AVIOContext @ 040e3f40] Statistics: 65536 bytes read, 0 seeks

  • Revision 56fa3ab886 : Use non-zero mode threshold for NEARESTMV modes This commit makes the encoder t

    16 septembre 2014, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_rd.c



    Use non-zero mode threshold for NEARESTMV modes

    This commit makes the encoder to use non-zero mode threshold for
    NEARESTMV modes. The runtime for test clips of speed 3 is reduced
    by about 1%.

    pedestrian 1080p 2000 kbps, 143239 ms -> 141989 ms
    bus CIF 1000 kbps, 7835 ms -> 7749 ms

    The compression performance change is about -0.02% for both derf
    and stdhd.

    Change-Id : Ib71808922c41ae2997100cb7c561f68dcebfa08e

  • Using FFMpeg with Runtime.exec() to do a simple transcoding

    1er novembre 2011, par Adam Ingmansson

    I know there are many questions touching this subject, but none have helped me solve my issue.

    Purpose :

    Transcoding a video taken,from a queue, from .mov to h.264 (for now only that)

    Solution :

    Building a java application that gets the next in the queue, transcodes it then repeat

    Problem :

    Running ffmpeg using Runtime.exec() is not working.
    Im using the StreamGobbler from this tutorial to capturing the output from the process.

    This code shows how i start my process :

    String[] command = new String[]{"./ffmpeg/ffmpeg","-i",videoFile.getPath(),"-vcodec","libx264","-fpre",preset,folder + recID + ".flv"};
    
System.out.println("Running command..");
    
Process p = r.exec(command);
    

    
 // any error message?
    
StreamGobbler errorGobbler = new 
    
StreamGobbler(p.getErrorStream(), "ERROR");            
    

    
// any output?
    
StreamGobbler outputGobbler = new 
    
StreamGobbler(p.getInputStream(), "OUT");
    

    
// kick them off
    
errorGobbler.start();
    
outputGobbler.start();
    

    
//logProcessOutputAndErrors(p);
    

    
int res = p.waitFor();
    
if (res != 0) {
    
    throw new Exception("Encoding error: "+String.valueOf(res));
    
}

    and this is the current modified version of StreamGobbler (the important part)

    InputStreamReader isr = new InputStreamReader(is);
    
BufferedReader br = new BufferedReader(isr);
    
String line=null;
    
int c = 0;
    
StringBuilder str = new StringBuilder();
    

    
while (true) {
    
    c = br.read();
    
}

    Sometimes ffmpeg just stalls, maybe waiting for my input (although there is no indication on screen).

    Sometimes it just ends.

    Sometimes (when I added the line "System.out.print((char) c) ;" in the while-loop above) i got loads of "¿¿ï" repeated over and over again, wich might be the actual encoding of the video wich I managed to capture instead of to a file.

    For those who wonders why i dont just go with a commandline or maybe even php :

    The purpose is an application that will run 24/7 transcoding anything and everything from a queue. The files are pretty large to begin with and takes about 15 min to transcode.

Navigation