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  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • 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 (...)

  • 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 (10815)

  • iPhone ffmpeg dev using libav to decode from AMR to ACC codec

    10 octobre 2011, par VictorT

    It seems to be that, the AMR support of AudioQueue has been disappeared since iOS 4.3 was released. I can't use audio frame received from RSTP server with old way :

    audioFormat.mFormatID = kAudioFormatAMR; 
    
int err = AudioQueueNewOutput(&audioFormat, MyAudioQueueOutputCallback, self, NULL, kCFRunLoopCommonModes, 0, &audioQueue);

    As a result I received an error in last string.

    Maybe someone know how to decode AMR AVPacket into raw buffer and encode it with AAC or MP3 using LIBAV ?

    I've tried to use

    avcodec_decode_audio3

    It works and I can get raw buffer but when I'm trying to encode it with

    avcodec_encode_audio

    I get 0 as result

    This is my method to encode buffer :

    - (AVPacket) encodeRawFrame:(const short *) in_buffer withSize:(unsigned int) in_buf_byte_size
    
{
    
    AVPacket res;
    
    AVCodec *codec;
    
    AVCodecContext *c= NULL;
    
    int count, out_size, outbuf_size, frame_byte_size;
    
    uint8_t *outbuf;
    

    
    avcodec_init();
    
    avcodec_register_all();
    

    
    printf("Audio encoding\n");
    

    
    codec = avcodec_find_encoder(CODEC_ID_AAC);
    
    if (!codec) {
    
        fprintf(stderr, "codec not found\n");
    
        return res;
    
    }
    

    
    c= avcodec_alloc_context();
    

    
    c->bit_rate = 64000;
    
    c->sample_rate = 24000;
    
    c->channels = 2;
    

    
    if (avcodec_open(c, codec) < 0) 
    
    {
    
        fprintf(stderr, "could not open codec\n");
    
    }
    
    else
    
    {
    
        frame_byte_size=c->frame_size*2*2;
    
        count = in_buf_byte_size/frame_byte_size;
    

    
        fprintf(stderr, "Number of frames: %d\n", count);
    

    
        outbuf_size = AVCODEC_MAX_AUDIO_FRAME_SIZE;
    
        outbuf = (uint8_t*) malloc(outbuf_size);
    

    
        out_size = avcodec_encode_audio(c, outbuf, outbuf_size, &in_buffer[frame_byte_size*i]);
    
        if(out_size >= 0)
    
        {
    
            res.size = outbuf_size;
    
            res.data = malloc(outbuf_size);                
    
        }
    

    
        free(outbuf);
    
    }
    

    

    
    avcodec_close(c);
    
    av_free(c);
    
    return res;
    
}

    After encoding "out_size" is always 0 and result buffer is empty.

    Thanks.

  • How to make ffmpeg remux an iPhone MOV (HEVC) that works on Apple products ?

    21 janvier 2024, par Mikael Finstad

    I want to remux a HEVC file (without encoding). I have tried most options, even removing audio, but I cannot get an output file that plays smoothly with Apple products.

    



    First I AirDrop any MOV from an iPhone recorded with the camera in HEVC.

    



    Then run :

    



    ffmpeg -i IMG_4605.MOV -c copy out.mov


    



    Then if I send out.mov back to the iPhone and try to play it back, it plays back with glitches while seeking, like this : (original to the right)

    



    Result
Original

    



    When I try to drag the file into a new iMovie project and try to play it back, it freezes the whole iMovie app and needs a force quit.

    



    Doing the same with the original causes no issues, so obviously there is something wrong with the way ffmpeg remuxes it, or something wrong with Apple's software.

    



    ffmpeg -i IMG_4605.MOV 
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'IMG_4605.MOV':
  Metadata:
    major_brand     : qt  
    minor_version   : 0
    compatible_brands: qt  
    creation_time   : 2019-12-29T10:20:56.000000Z
    com.apple.quicktime.location.ISO6709: +01.3602+103.9897+024.438/
    com.apple.quicktime.make: Apple
    com.apple.quicktime.model: iPhone 11
    com.apple.quicktime.software: 13.3
    com.apple.quicktime.creationdate: 2019-12-29T18:20:56+0800
  Duration: 00:00:09.00, start: 0.000000, bitrate: 24882 kb/s
    Stream #0:0(und): Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 3840x2160, 24659 kb/s, 29.99 fps, 29.97 tbr, 600 tbn, 600 tbc (default)
    Metadata:
      rotate          : 90
      creation_time   : 2019-12-29T10:20:56.000000Z
      handler_name    : Core Media Video
      encoder         : HEVC
    Side data:
      displaymatrix: rotation of -90.00 degrees
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
    Metadata:
      creation_time   : 2019-12-29T10:20:56.000000Z
      handler_name    : Core Media Audio
    Stream #0:2(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    Metadata:
      creation_time   : 2019-12-29T10:20:56.000000Z
      handler_name    : Core Media Metadata
    Stream #0:3(und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
    Metadata:
      creation_time   : 2019-12-29T10:20:56.000000Z
      handler_name    : Core Media Metadata
    Stream #0:4(und): Data: none (mebx / 0x7862656D), 17 kb/s (default)
    Metadata:
      creation_time   : 2019-12-29T10:20:56.000000Z
      handler_name    : Core Media Metadata


    



    ffmpeg -i out.mov
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mov':
  Metadata:
    major_brand     : qt  
    minor_version   : 512
    compatible_brands: qt  
    encoder         : Lavf58.29.100
  Duration: 00:00:09.00, start: 0.000000, bitrate: 24860 kb/s
    Stream #0:0: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 3840x2160, 24659 kb/s, 29.99 fps, 29.97 tbr, 19200 tbn, 19200 tbc (default)
    Metadata:
      rotate          : 90
      handler_name    : Core Media Video
      encoder         : HEVC
    Side data:
      displaymatrix: rotation of -90.00 degrees
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
    Metadata:
      handler_name    : Core Media Audio


    



    If I open out.mov in QuickTime and do a trim and export it, then it it still "broken", so I'm thinking there's nothing wrong with the actual muxing into MOV, because QuickTime is passing the error on.

    



    I noticed that out.mov has different parameters 19200 tbn, 19200 tbc (vs original 600 tbn, 600 tbc). However, if I force set these to 600 with -video_track_timescale 600 the output file is still broken.

    



    Anyone got some insights ?

    


  • iphone ios sample ffplay main.c —> FFmpeg.c change and input parameter , following errer please advice

    4 août 2017, par 224ok

    FFmpeg main c source

    int main(int argc, char **argv)
    
{
    

    
    int flags, i;
    
    argv[1] = "-i";
    
    argv[2] = "ipod-library://item/item.mp3?id=1218551163727305907";    
    
         //argv[2] = "mon.mp3";
    

    
    argv[3] = "-acodec";
    
    argv[4] = "libfaac";
    
    argv[5] = "-ac";
    
    argv[6] = "2";
    
    argv[7] = "-ar";
    
    argv[8] = "44100";
    
    argv[9] = "-ab";
    
    argv[10] = "128k";
    
    argv[11] = "output.aac";
    
    argv[3] = "-vn";
    
    argv[4] = "-acodec";
    
    argv[5] = "libfaac";
    
    argv[6] = "-ac";
    
    argv[7] = "2";
    
    argv[8] = "-ar";
    
    argv[9] = "44100";
    
    argv[10] = "-ab";
    
    argv[11] = "128k";
    
    argv[12] = "output.aac";
    
    //  argv[14] = "rtsp://video.bouygtel.fr/50400/tf1.sdp";
    
    argc += 12;

    error : ipod-library ://item/item.mp3 ?id=1218551163727305907 : No such file or directory
    and if
    argv[2] = "mon.mp3" ; ---> mon.mp3 : No such file or directory

    please advice.

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