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  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • XMP PHP

    13 mai 2011, par

    Dixit Wikipedia, XMP signifie :
    Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
    Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
    XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...)

Sur d’autres sites (1933)

  • libavcodec/qsvenc : Add low_delay_brc reset support to qsvenc

    6 septembre 2022, par Wenbin Chen
    libavcodec/qsvenc : Add low_delay_brc reset support to qsvenc

    Signed-off-by : Wenbin Chen <wenbin.chen@intel.com>
    • [DH] doc/encoders.texi
    • [DH] libavcodec/qsvenc.c
    • [DH] libavcodec/qsvenc.h

  • libavcodec/qsvenc : Add max/min qp reset support in qsvenc

    6 septembre 2022, par Wenbin Chen
    libavcodec/qsvenc : Add max/min qp reset support in qsvenc

    Signed-off-by : Wenbin Chen <wenbin.chen@intel.com>
    • [DH] doc/encoders.texi
    • [DH] libavcodec/qsvenc.c
    • [DH] libavcodec/qsvenc.h

  • raspberry pi, ffmpeg, libmp3lame stream to icecast2 fails with : av_interleaved_write_frame() : Connection reset by peer

    9 avril 2016, par seekwhencer

    finally, i want to merge or mix audio channels from two streams into one new audio stream. but at first i want to relay or reencode an existing stream from an icecast2 server - and send it back to the icecast as new mountpoint. this stream comes from mpd on the same raspberry pi 2. and it works fine.

    i’ve got lame and ffmpeg on this way :

    cd /usr/src
    
git clone https://github.com/rbrito/lame
    
cd lame
    
sudo ./configure
    
sudo make
    
sudo make install

    then ffmpeg

    cd /usr/src
    
sudo rm -R ffmpeg
    
git clone git://source.ffmpeg.org/ffmpeg.git
    
cd ffmpeg
    
sudo ./configure --arch=armel --target-os=linux --enable-gpl --enable-libmp3lame --enable-nonfree
    
sudo make
    
sudo make install

    A simple test fails with :

    **av_interleaved_write_frame(): Connection reset by peer
    
Error writing trailer of icecast://admin:hackme@127.0.0.1:8000/listen: Connection reset by peersize=       5kB time=00:00:00.28 bitrate= 144.7kbits/s speed=1.73x**

    (with strange spaces)

    The reencoding ffmpeg script :

    ffmpeg \
    
 -i http://127.0.0.1:8000/live \
    
 -c:a libmp3lame -b:a 128k \
    
 -legacy_icecast 1 \
    
 -content_type audio/mpeg \
    
 -ice_name "hack radio" \
    
 -f mp3 icecast://admin:hackme@127.0.0.1:8000/listen \
    
 -y \
    
 -stats \
    
 -report

    I tried legacy_icecast 1 or 0.

    The ffmpeg report :

    ffmpeg started on 2016-04-09 at 00:57:56
    
Report written to "ffmpeg-20160409-005756.log"
    
Command line:
    
ffmpeg -i http://127.0.0.1:8000/live -muxpreload 10 -c:a libmp3lame -b:a 128k -legacy_icecast 1 -content_type audio/mpeg -ice_name "NFS One Radio" -f mp3 icecast://admin:hackme@127.0.0.1:8000/listen -y -stats -report
    
ffmpeg version N-79262-gae8a13c Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 4.6 (Debian 4.6.3-14+rpi1)
    
  configuration: --arch=armel --target-os=linux --enable-gpl --enable-libmp3lame --enable-nonfree
    
  libavutil      55. 20.100 / 55. 20.100
    
  libavcodec     57. 34.100 / 57. 34.100
    
  libavformat    57. 31.100 / 57. 31.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 41.100 /  6. 41.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
Splitting the commandline.
    
Reading option '-i' ... matched as input file with argument 'http://127.0.0.1:8000/live'.
    
Reading option '-muxpreload' ... matched as option 'muxpreload' (set the initial demux-decode delay) with argument '10'.
    
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'libmp3lame'.
    
Reading option '-b:a' ... matched as option 'b' (video bitrate (please use -b:v)) with argument '128k'.
    
Reading option '-legacy_icecast' ... matched as AVOption 'legacy_icecast' with argument '1'.
    
Reading option '-content_type' ... matched as AVOption 'content_type' with argument 'audio/mpeg'.
    
Reading option '-ice_name' ... matched as AVOption 'ice_name' with argument 'NFS One Radio'.
    
Reading option '-f' ... matched as option 'f' (force format) with argument 'mp3'.
    
Reading option 'icecast://admin:hackme@127.0.0.1:8000/listen' ... matched as output file.
    
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
    
Reading option '-stats' ... matched as option 'stats' (print progress report during encoding) with argument '1'.
    
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 y (overwrite output files) with argument 1.
    
Applying option stats (print progress report during encoding) with argument 1.
    
Applying option report (generate a report) with argument 1.
    
Successfully parsed a group of options.
    
Parsing a group of options: input file http://127.0.0.1:8000/live.
    
Successfully parsed a group of options.
    
Opening an input file: http://127.0.0.1:8000/live.
    
[http @ 0x343cee0] Setting default whitelist 'http,https,tls,rtp,tcp,udp,crypto,httpproxy'
    
[http @ 0x343cee0] request: GET /live HTTP/1.1
    
User-Agent: Lavf/57.31.100
    
Accept: */*
    
Range: bytes=0-
    
Connection: close
    
Host: 127.0.0.1:8000
    
Icy-MetaData: 1
    

    

    
[mp3 @ 0x343c7e0] Format mp3 probed with size=262144 and score=50
    
[mp3 @ 0x343c7e0] Skipping 656 bytes of junk at 0.
    
[mp3 @ 0x343c7e0] Before avformat_find_stream_info() pos: 656 bytes read:272000 seeks:0
    
[mp3 @ 0x343c7e0] All info found
    
[mp3 @ 0x343c7e0] After avformat_find_stream_info() pos: 42640 bytes read:272000 seeks:0 frames:50
    
Input #0, mp3, from 'http://127.0.0.1:8000/live':
    
  Metadata:
    
    icy-br          : 256
    
    icy-name        : NFS One Radio
    
    icy-pub         : 0
    
    StreamTitle     : x
    
  Duration: N/A, start: 0.000000, bitrate: 256 kb/s
    
    Stream #0:0, 50, 1/14112000: Audio: mp3, 44100 Hz, stereo, s16p, 256 kb/s
    
Successfully opened the file.
    
Parsing a group of options: output file icecast://admin:hackme@127.0.0.1:8000/listen.
    
Applying option muxpreload (set the initial demux-decode delay) with argument 10.
    
Applying option c:a (codec name) with argument libmp3lame.
    
Applying option b:a (video bitrate (please use -b:v)) with argument 128k.
    
Applying option f (force format) with argument mp3.
    
Successfully parsed a group of options.
    
Opening an output file: icecast://admin:hackme@127.0.0.1:8000/listen.
    
[icecast @ 0x34492c0] No default whitelist set
    
[http @ 0x344b9e0] Setting default whitelist 'http,https,tls,rtp,tcp,udp,crypto,httpproxy'
    
[http @ 0x344b9e0] request: SOURCE /listen HTTP/1.1
    
User-Agent: Lavf/57.31.100
    
Accept: */*
    
Connection: close
    
Host: 127.0.0.1:8000
    
Content-Type: audio/mpeg
    
Icy-MetaData: 1
    
Ice-Name: NFS One Radio
    
Ice-Public: 0
    
Authorization: Basic YWRtaW46bWFyc2Jhc2U=

    The Output from ffmpeg :

    ffmpeg started on 2016-04-09 at 01:06:46
    
Report written to "ffmpeg-20160409-010646.log"
    
ffmpeg version N-79262-gae8a13c Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 4.6 (Debian 4.6.3-14+rpi1)
    
  configuration: --arch=armel --target-os=linux --enable-gpl --enable-libmp3lame --enable-nonfree
    
  libavutil      55. 20.100 / 55. 20.100
    
  libavcodec     57. 34.100 / 57. 34.100
    
  libavformat    57. 31.100 / 57. 31.100
    
  libavdevice    57.  0.101 / 57.  0.101
    
  libavfilter     6. 41.100 /  6. 41.100
    
  libswscale      4.  1.100 /  4.  1.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
[mp3 @ 0x25ec7e0] Skipping 501 bytes of junk at 0.
    
Input #0, mp3, from 'http://127.0.0.1:8000/live':
    
  Metadata:
    
    icy-br          : 256
    
    icy-name        : NFS One Radio
    
    icy-pub         : 0
    
    StreamTitle     : x
    
  Duration: N/A, start: 0.000000, bitrate: 256 kb/s
    
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 256 kb/s
    
Output #0, mp3, to 'icecast://admin:hackme@127.0.0.1:8000/listen':
    
  Metadata:
    
    icy-br          : 256
    
    icy-name        : NFS One Radio
    
    icy-pub         : 0
    
    StreamTitle     : x
    
    TSSE            : Lavf57.31.100
    
    Stream #0:0: Audio: mp3 (libmp3lame), 44100 Hz, stereo, s16p, 128 kb/s
    
    Metadata:
    
      encoder         : Lavc57.34.100 libmp3lame
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mp3 (native) -> mp3 (libmp3lame))
    
Press [q] to stop, [?] for help
    
av_interleaved_write_frame(): Connection reset by peer
    
Error writing trailer of icecast://admin:hackme@127.0.0.1:8000/listen: Connection reset by peersize=      16kB time=00:00:00.96 bitrate= 132.9kbits/s speed=3.14x
    
video:0kB audio:16kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.183730%

    The icecast works fine with mpd. And icecast creates a new mountpoint when feeded.

    For some reason the connection to the icecast drops. Ideas ?

    Thanks

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