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Autres articles (88)

  • L’utiliser, en parler, le critiquer

    10 avril 2011

    La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
    Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
    Une liste de discussion est disponible pour tout échange entre utilisateurs.

  • Mediabox : ouvrir les images dans l’espace maximal pour l’utilisateur

    8 février 2011, par

    La visualisation des images est restreinte par la largeur accordée par le design du site (dépendant du thème utilisé). Elles sont donc visibles sous un format réduit. Afin de profiter de l’ensemble de la place disponible sur l’écran de l’utilisateur, il est possible d’ajouter une fonctionnalité d’affichage de l’image dans une boite multimedia apparaissant au dessus du reste du contenu.
    Pour ce faire il est nécessaire d’installer le plugin "Mediabox".
    Configuration de la boite multimédia
    Dès (...)

  • 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

Sur d’autres sites (6836)

  • Piwik PRO is hiring a Technical Support Specialist (Remote)

    13 mars 2015, par Piwik Core Team — Jobs

    At Piwik and Piwik PRO we develop the leading open source web analytics platform, used by more than one million websites worldwide. Our vision is to build the best open alternative to Google Universal Analytics. We are growing and now looking for a Technical Support Specialist !

    What will you be doing ?

    • Supporting Piwik PRO clients on a daily basis – providing rapid responses via phone and email.
    • Participating in calls with Piwik PRO clients analyzing requirements for enterprise customers.
    • Onboarding clients – planning and coordinating the implementation with the dedicated technical team.
    • Communicating complex problems to the dedicated technical team.

    We can promise you :

    • A competitive salary.
    • The opportunity to develop your skills and gain more experience by working on exceptional projects.
    • Access to a regularly updated resource library and the opportunity to contribute to it.
    • Flexible working hours.

    Desired Skills and Experience

    You won’t make it without :

    • A solid technical background and a familiarity with the IT sector.
    • A receptive mind.
    • Great English communication skills (speaking, reading, writing, and listening).
    • Previous experience of working with corporate clients and a sixth sense for striking up relationships.
    • Appropriately mixed abilities : solid communication skills, inquisitiveness and an analytical mind (have the ability to draw conclusions based on gathered data).
    • Great self-organization skills.

    About Piwik PRO

    At Piwik and Piwik PRO we develop the leading open source web analytics platform, used by over 1.1M websites worldwide and is currently ranked the 7th most used web analytics tool in the world. Our vision is to build the best open alternative to Google Universal Analytics.

    The Piwik platform collects, stores and processes a lot of information : hundreds of millions of data points each month. We create intuitive, simple and beautiful reports that delight our users.

    Piwik PRO provides cloud hosting solutions and enterprise-level support and consultancy services. We’re in the process of expanding our US team and are currently seeking to hire a Technical Support Specialist who will focus on assisting our US clients.

    Location

    Ideally you will be located in the USA or Canada (Remote work).

    Apply online

    To apply for this position, please Apply online here. We look forward to receiving your applications !

  • Grey squared artifacts after HEVC 10-bit encoding using FFmpeg's NVENC encoder

    20 juillet 2017, par Cryman

    Recently I purchased a brand new GPU - AORUS GeForce GTX 1080 Ti. I found out that it supports HEVC 10-bit encoding, so I wanted to give that a try. Unfortunately, after encoding I noticed some artifacts, which occur in dark scenes and last one frame of the video. You can see them on these screenshots :

    Screenshot of a still from an animated scene. There is an artifact near the bottom and slightly to the left. It is square shaped with white squiggles.

    Screenshot of a still from another animated scene. The artifact looks the same as in the previous image but is in a different location, higher up and closer to the center.

    I was wondering if someone could help me figure out what might be the cause of these artifacts and how I can get rid of them.

    Here is the MI of the source video :

    ID                                       : 1
    
Format                                   : AVC
    
Format/Info                              : Advanced Video Codec
    
Format profile                           : High@L4.1
    
Format settings, CABAC                   : Yes
    
Format settings, ReFrames                : 4 frames
    
Codec ID                                 : V_MPEG4/ISO/AVC
    
Duration                                 : 2 h 2 min
    
Bit rate mode                            : Variable
    
Bit rate                                 : 29.5 Mb/s
    
Maximum bit rate                         : 37.0 Mb/s
    
Width                                    : 1 920 pixels
    
Height                                   : 1 080 pixels
    
Display aspect ratio                     : 16:9
    
Frame rate mode                          : Constant
    
Frame rate                               : 23.976 (24000/1001) FPS
    
Color space                              : YUV
    
Chroma subsampling                       : 4:2:0
    
Bit depth                                : 8 bits
    
Scan type                                : Progressive
    
Bits/(Pixel*Frame)                       : 0.593
    
Stream size                              : 25.2 GiB (66%)
    
Language                                 : English
    
Default                                  : Yes
    
Forced                                   : No

    And here is the MI of the encoded video :

    ID                                       : 1
    
Format                                   : HEVC
    
Format/Info                              : High Efficiency Video Coding
    
Format profile                           : Main 10@L4@Main
    
Codec ID                                 : V_MPEGH/ISO/HEVC
    
Duration                                 : 2 h 2 min
    
Bit rate                                 : 3 689 kb/s
    
Width                                    : 1 920 pixels
    
Height                                   : 800 pixels
    
Display aspect ratio                     : 2.40:1
    
Frame rate mode                          : Constant
    
Frame rate                               : 23.976 (24000/1001) FPS
    
Standard                                 : Component
    
Color space                              : YUV
    
Chroma subsampling                       : 4:2:0
    
Bit depth                                : 10 bits
    
Bits/(Pixel*Frame)                       : 0.100
    
Stream size                              : 3.15 GiB (95%)
    
Default                                  : Yes
    
Forced                                   : No
    
Color range                              : Limited

    The command I’m using for encoding :

    ffmpeg -hide_banner -i "" -map 0:v:0 -map_chapters -1 -map_metadata -1 -vf "crop=1920:800:0:140" -vcodec hevc_nvenc -pix_fmt p010le -preset hq -profile:v main10 -rc constqp -global_quality 21 -rc-lookahead 32 -g 240 -f matroska Video_CQP21_LAF32_GOP240.mkv

  • android ffmpeg error fatal signal 11

    10 décembre 2014, par AKUMA

    I’m using ffmpeg on Android. and Use RTSP webcam.

    I refer here.

    I get good video.

    But I receive error when I ended the video.

    Fatal signal 11 (SIGSEGV) at 0x8a7c0d04 (code=1), thread 2537 (Thread-13225)

    So I found the error using the log. But I don’t know why the error occurred.

    The code below is the location of the error.

    void closeMovie(){
    
  av_read_pause(gFormatCtx);
    
  if (gVideoBuffer != NULL) {
    
    free(gVideoBuffer);
    
    gVideoBuffer = NULL;
    
  }
    
  if (gFrame != NULL)
    
      av_free(gFrame);
    
  if (gFrameRGB != NULL)
    
      av_free(gFrameRGB);
    
  if (gVideoCodecCtx != NULL) {
    
      avcodec_close(gVideoCodecCtx);
    
      av_free(gVideoCodecCtx);
    
      gVideoCodecCtx = NULL;
    
  }
    
  if (gFormatCtx != NULL) {
    
      **av_close_input_file(gFormatCtx);** //here
    
      gFormatCtx = NULL;
    
  }
    
}

    and

    void av_close_input_file(AVFormatContext *s)
    
{
    
  AVIOContext *pb = (s->iformat->flags & AVFMT_NOFILE) || (s->flags & AVFMT_FLAG_CUSTOM_IO) ?
    
                   NULL : s->pb;
    
  **av_close_input_stream(s);**// here
    
  if (pb)
    
    avio_close(pb);
    
}

    and

    void av_close_input_stream(AVFormatContext *s)
    
{
    
    flush_packet_queue(s);
    
    if (s->iformat->read_close)
    
       **s->iformat->read_close(s);** //here
    
    avformat_free_context(s);
    
}

    if //s->iformat->read_close(s); not crash

    But I can not open the video once more. Again to open the video I have to quit the app.

    Sorry, I can’t speak English very well.
    Thanks for reading.

    ps1. LogCat

    12-10 10:08:02.991: D/TAG(21770): TAG - closeMovie1 - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - avcodec_close - in
    
12-10 10:08:02.991: D/TAG(21770): av_opt_free - on
    
12-10 10:08:02.991: D/TAG(21770): av_opt_free - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avcodec_close - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - av_close_input_file - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_close_input - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - flush_packet_queue - 
    
12-10 10:08:02.991: D/TAG(21770): flush_packet_queue - on
    
12-10 10:08:02.991: D/TAG(21770): flush_packet_queue - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - s->iformat->read_close : 0
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_free_context 
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_free_context - in
    
12-10 10:08:02.991: D/TAG(21770): av_opt_free - on
    
12-10 10:08:02.991: D/TAG(21770): av_opt_free - out
    
12-10 10:08:02.991: D/TAG(21770): av_opt_free - on
    
12-10 10:08:02.991: D/TAG(21770): av_opt_free - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_length s->nb_streams - 3
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_nb_streams - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_ nb_streams - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_nb_streams - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_ nb_streams - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_nb_streams - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_ nb_streams - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_for_length s->nb_programs-1 - -1
    
12-10 10:08:02.991: D/TAG(21770): TAG - freep 1
    
12-10 10:08:02.991: D/TAG(21770): TAG - freep 2
    
12-10 10:08:02.991: D/TAG(21770): TAG - while
    
12-10 10:08:02.991: D/TAG(21770): TAG - freep 3
    
12-10 10:08:02.991: D/TAG(21770): TAG - dict_free 1
    
12-10 10:08:02.991: D/TAG(21770): TAG - freep 4
    
12-10 10:08:02.991: D/TAG(21770): TAG - freep 3
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_free_context - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - 1
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - 2
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close(pb) : 0
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - in
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - 1
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - 2
    
12-10 10:08:02.991: D/TAG(21770): TAG - avio_close - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - avformat_close_input - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - av_close_input_file - out
    
12-10 10:08:02.991: D/TAG(21770): TAG - closeMovie1 - out
    
12-10 10:08:03.151: D/AbsListView(21770): onVisibilityChanged() is called, visibility : 0
    
12-10 10:08:03.151: D/AbsListView(21770): unregisterIRListener() is called 
    
12-10 10:08:03.201: D/AbsListView(21770): unregisterIRListener() is called 
    
12-10 10:08:03.221: D/AbsListView(21770): unregisterIRListener() is called 
    
12-10 10:08:03.241: A/libc(21770): Fatal signal 11 (SIGSEGV) at 0x8bb85698 (code=1), thread 21938 (Thread-23561)

    ps2.The order of the log.

    (BasicPlayer.c) closeMovie in->
    
(utils.c) avcodec_close ->
    
(utils.c) av_close_input_file ->
    
(utils.c) avformat_close_input ->
    
(utils.c) flush_packet_queue ->
    
(utils.c) **s->iformat->read_close(s)** ->
    
(utils.c) avformat_free_context ->
    
(utils.c) avio_close(pb) ->
    
(BasicPlayer.c) closeMovie out

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