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Autres articles (102)

  • 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

  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

  • 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 (...)

Sur d’autres sites (6292)

  • Transcoding Live Audio Stream

    24 avril 2019, par Anjed

    I need to implement a scalable service (using C++|Go) to transcode incoming audio stream (via gRPC) to outgoing Linear16 (PCM) stream (via TCP)

    It seems that this could be done with ffmpeg and libav but I’m not sure how to do it, because output should be a stream rather than a file.

    Furthermore, the service will be exposed to over 1K requests per second therefore I need a solution for CPU-intensive multi-threaded environment.

    Incoming stream may be one of these :

    FLAC
    
AMR
    
MP2/3
    
OPUS
    
SPEEX
    
mu-law

  • Cut video command producing only audio

    12 février 2018, par Sandeep

    I am using ffmpeg in Android app and my command code looks like :

          final String[] command=new String[]{"-i",inputFileName , "-ss",
    
 String.valueOf(duration) , "-codec","copy", "-t",String.valueOf(start) , outputFileName};

    The logcat contains following ffmpeg output which shows video as 0kB in last line. Where should I look for fixing this because the final output file is a mp4 file but the video content is missing and only audio is present for the trimmed duration :

    02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg ffmpeg version n3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
    
02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg   built with gcc 4.9.x (GCC) 20150123 (prerelease)
    
02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg   configuration: --target-os=linux --cross-prefix=/root/bravobit/ffmpeg-android/toolchain-android/bin/i686-linux-android- --arch=x86 --cpu=i686 --enable-runtime-cpudetect --sysroot=/root/bravobit/ffmpeg-android/toolchain-android/sysroot --disable-asm --enable-pic --enable-libx264 --enable-libfreetype --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libopus --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-linux-perf --disable-doc --disable-shared --enable-static --enable-runtime-cpudetect --enable-nonfree --enable-network --enable-avresample --enable-avformat --enable-avcodec --enable-indev=lavfi --enable-hwaccels --enable-ffmpeg --enable-zlib --enable-gpl --enable-small --disable-asm --pkg-config=/root/bravobit/ffmpeg-android/ffmpeg-pkg-config --prefix=/root/bravobit/ffmpeg-android/build/x86 --extra-cflags='-I/root/bravobit/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=i686' --extra-ldflags='-L/root/bravobit/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-cxxflags= --extra-libs='-lpng -lx264 -lm -logg'
    
02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg   libavutil      55. 78.100 / 55. 78.100
    
02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg   libavcodec     57.107.100 / 57.107.100
    
02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg   libavformat    57. 83.100 / 57. 83.100
    
02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg   libavdevice    57. 10.100 / 57. 10.100
    
02-12 17:22:43.837 25335-25335/service D/FFmpeg: Started command : ffmpeg   libavfilter     6.107.100 /  6.107.100
    
02-12 17:22:43.838 25335-25335/service D/FFmpeg: Started command : ffmpeg   libavresample   3.  7.  0 /  3.  7.  0
    
02-12 17:22:43.838 25335-25335/service D/FFmpeg: Started command : ffmpeg   libswscale      4.  8.100 /  4.  8.100
    
02-12 17:22:43.838 25335-25335/service D/FFmpeg: Started command : ffmpeg   libswresample   2.  9.100 /  2.  9.100
    
02-12 17:22:43.838 25335-25335/service D/FFmpeg: Started command : ffmpeg   libpostproc    54.  7.100 / 54.  7.100
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/SampleVideo_1280x720_1mb.mp4':
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg   Metadata:
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     major_brand     : isom
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     minor_version   : 512
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     compatible_brands: isomiso2avc1mp41
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     creation_time   : 1970-01-01T00:00:00.000000Z
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     encoder         : Lavf53.24.2
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg   Duration: 00:00:05.31, start: 0.000000, bitrate: 1589 kb/s
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     Metadata:
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg       creation_time   : 1970-01-01T00:00:00.000000Z
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg       handler_name    : VideoHandler
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 384 kb/s (default)
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     Metadata:
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg       creation_time   : 1970-01-01T00:00:00.000000Z
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg       handler_name    : SoundHandler
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg Output #0, mp4, to '/storage/emulated/0/VideoTriming/20180212_172243SampleVideo_1280x720_1mb.mp4':
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg   Metadata:
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     major_brand     : isom
    
02-12 17:22:43.902 25335-25335/service D/FFmpeg: Started command : ffmpeg     minor_version   : 512
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg     compatible_brands: isomiso2avc1mp41
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg     encoder         : Lavf57.83.100
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg     Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg     Metadata:
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg       creation_time   : 1970-01-01T00:00:00.000000Z
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg       handler_name    : VideoHandler
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg     Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 384 kb/s (default)
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg     Metadata:
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg       creation_time   : 1970-01-01T00:00:00.000000Z
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg       handler_name    : SoundHandler
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg Stream mapping:
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg   Stream #0:0 -> #0:0 (copy)
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg   Stream #0:1 -> #0:1 (copy)
    
02-12 17:22:43.903 25335-25335/service D/FFmpeg: Started command : ffmpeg Press [q] to stop, [?] for help
    
02-12 17:22:43.910 25335-25335/service D/FFmpeg: Started command : ffmpeg frame=    0 fps=0.0 q=-1.0 Lsize=      46kB time=00:00:00.98 bitrate= 387.1kbits/s speed= 115x    
    
02-12 17:22:43.910 25335-25335/service D/FFmpeg: Started command : ffmpeg video:0kB audio:46kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.145508%

    My input file is the first 1MB mp4 sample video downloaded from following website :

    http://www.sample-videos.com/

  • Evolution #3071 : Performance boucle DATA sur CSV

    10 octobre 2013, par cam.lafit -

    Ciao

    fgetcsv n’est pas fiable (ou du moins incomplet). Entre autre on peut rencontrer des problèmes avec les différents formats de saut de ligne comme \r\n et \n. De plus le support du caractère d’échappement est limité.
    On peut voir certains commentaires sur http://www.php.net/manual/fr/function.fgetcsv.php#58124 pour mieux comprendre les contraintes associées à cette fonction.

    Si on veut un truc robuste on ne peut se contenter des fonctions php. C’est je suppose la cause du fichier dédié dans SPIP.

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