Recherche avancée

Médias (1)

Mot : - Tags -/net art

Autres articles (30)

  • 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 (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

Sur d’autres sites (6814)

  • How to merge 2 mp4 files with 1 atom ?

    2 octobre 2013, par user2783132

    I'm merging two mp4 files for video streaming. the problem is, the merged file contains two atoms, 1 atom from each file and that is a problem when it comes to streaming. the client needs to wait until the first atom loads from file1, than when it's time to play second part from file2 client will wait again for the atom to be loaded. when your atom is small you may not notice this, but when you stream a large video, atom could weight 7-10mb.

    How can I remove those two atoms from merged file and create a new one ?

    what i've tried :

    ffmpeg -i file1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
    
ffmpeg -i file2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
    
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts" -c copy -bsf:a aac_adtstoasc m.file.mp4
    

    
MP4Box -add m.file.mp4 -isma mf.file.mp4
    
mv mf.file.mp4 m.file.mp4

  • ffmpeg `avformat_write_header` fail with -22 Invalid arg

    3 février 2017, par user998953

    I am having an error with FFMPEG. Here is my code :

    static int open_output_file(const char *filename) {
    
    AVStream *out_stream;
    
    AVStream *in_stream;
    
    AVCodecContext *dec_ctx, *enc_ctx;
    
    AVCodec *encoder;
    
    int ret;
    
    unsigned int i;
    
    ofmt_ctx = NULL;
    
    avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, filename);
    
    if (!ofmt_ctx) {
    
        LOGD(NULL, AV_LOG_ERROR, "Could notcreate output context\n");
    
        return AVERROR_UNKNOWN;
    
    }
    
    for (i = 0; i < ifmt_ctx->nb_streams; i++) {
    
        out_stream = avformat_new_stream(ofmt_ctx, NULL);
    
        if (!out_stream) {
    
            LOGD(NULL, AV_LOG_ERROR, "Failed allocating output stream\n");
    
            return AVERROR_UNKNOWN;
    
        }
    
        in_stream = ifmt_ctx->streams[i];
    
        dec_ctx = in_stream->codec;
    
        enc_ctx = out_stream->codec;
    
        if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO
    
            || dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
    
            /* in this example, we choose transcoding to same codec */
    

    
            encoder = avcodec_find_encoder(dec_ctx->codec_id);
    
            enc_ctx = avcodec_alloc_context3(encoder);
    
            if (!encoder) {
    
                LOGE("encoder not avalibe ");
    
                return -1;
    
            }
    
            /* In this example, we transcode to same properties(picture size,
    
            * sample rate etc.). These properties can be changed for output
    
            * streams easily using filters */
    
            if (dec_ctx->codec_type == AVMEDIA_TYPE_VIDEO) {
    
                enc_ctx->height = dec_ctx->height;
    
                enc_ctx->width = dec_ctx->width;
    
                enc_ctx->sample_aspect_ratio = dec_ctx->sample_aspect_ratio;
    
                /* take first format from list of supported formats */
    
                enc_ctx->pix_fmt = encoder->pix_fmts[0];
    
                /* video time_base can be set to whatever is handy andsupported by encoder */
    
                enc_ctx->time_base = dec_ctx->time_base;
    
            } else {
    
                enc_ctx->sample_rate = dec_ctx->sample_rate;
    
                enc_ctx->channel_layout = dec_ctx->channel_layout;
    
                enc_ctx->channels = av_get_channel_layout_nb_channels(enc_ctx->channel_layout);
    
                /* take first format from list of supported formats */
    
                enc_ctx->sample_fmt = encoder->sample_fmts[0];
    
                AVRational time_base = {1, enc_ctx->sample_rate};
    
                enc_ctx->time_base = time_base;
    
            }
    
            /* Third parameter can be used to pass settings to encoder*/
    
            ret = avcodec_open2(enc_ctx, encoder, NULL);
    
            if (ret < 0) {
    
                LOGD("Cannot openvideo encoder for stream #%u\n", i);
    
                return ret;
    
            }
    
        } else if (dec_ctx->codec_type == AVMEDIA_TYPE_UNKNOWN) {
    
            LOGE("Elementarystream #%d is of unknown type, cannot proceed\n",
    
                 i);
    
            return AVERROR_INVALIDDATA;
    
        } else {
    
            /* if this stream must be remuxed */
    
            ret = avcodec_copy_context(ofmt_ctx->streams[i]->codec,
    
                                       ifmt_ctx->streams[i]->codec);
    
            if (ret < 0) {
    
                LOGE("Copyingstream context failed\n");
    
                return ret;
    
            }
    
        }
    
        if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
    
            enc_ctx->flags |= CODEC_FLAG_GLOBAL_HEADER;
    
    }
    
    av_dump_format(ofmt_ctx, 0, filename, 1);
    
    if (!(ofmt_ctx->oformat->flags & AVFMT_NOFILE)) {
    
        ret = avio_open(&ofmt_ctx->pb, filename, AVIO_FLAG_WRITE);
    
        if (ret < 0) {
    
            LOGE("Could not open output file '%s'", filename);
    
            return ret;
    
        }
    
    }
    
    ret = avformat_write_header(ofmt_ctx, NULL); //wrong here
    
    if (ret < 0) {
    
        char buf[1024] = {0};
    
        av_strerror(ret, buf, 1024);
    
        LOGE("Error occurred when opening output file : %s\n", buf);
    
        return ret;
    
    }
    
    return 0;
    
}

    Here is the ffmpeg log. Pay close attention to the error I am getting which is :

    Error occurred when opening output file : Invalid argument

    Here is the rest of it :

    02-03 18:09:44.120 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [mov,mp4,m4a,3gp,3g2,mj2 @ 0xebf33e00] After avformat_find_stream_info() pos: 680796 bytes read:308417 seeks:1 frames:48
    
02-03 18:09:44.120 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [h264 @ 0xea72cc00] nal_unit_type: 7, nal_ref_idc: 3
    
02-03 18:09:44.120 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [h264 @ 0xea72cc00] nal_unit_type: 8, nal_ref_idc: 3
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/sdcard/test2.mp4':
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:   Metadata:
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     major_brand     : 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: mp42
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     minor_version   : 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 0
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     compatible_brands: 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: isommp42
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     creation_time   : 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 2017-01-23T08:22:57.000000Z
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     com.android.version: 
    
02-03 18:09:44.121 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 6.0.1
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:   Duration: 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 00:00:07.74
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , start: 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 0.000000
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , bitrate: 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 14377 kb/s
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:0
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: (eng)
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 1, 1/90000
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Video: h264 (avc1 / 0x31637661), yuv420p, 1280x720, 13892 kb/s
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , SAR 1:1 DAR 16:9
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 30.02 fps, 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 30 tbr, 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 90k tbn, 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 60.04 tbc
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:  (default)
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Metadata:
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       rotate          : 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 90
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       creation_time   : 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 2017-01-23T08:22:57.000000Z
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       handler_name    : 
    
02-03 18:09:44.122 24571-24571/com.zhenbeiju.avplayer E/videoplayer: VideoHandle
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Side data:
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: displaymatrix: rotation of -90.00 degrees
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:1
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: (eng)
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 47, 1/48000
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:  (default)
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Metadata:
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       creation_time   : 
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: 2017-01-23T08:22:57.000000Z
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer:       handler_name    : 
    
02-03 18:09:44.123 24571-24571/com.zhenbeiju.avplayer E/videoplayer: SoundHandle
    
02-03 18:09:44.124 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [libx264 @ 0xdbf3dc00] using mv_range_thread = 56
    
02-03 18:09:44.126 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [libx264 @ 0xdbf3dc00] using cpu capabilities: none!
    
02-03 18:09:44.197 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [libx264 @ 0xdbf3dc00] profile High, level 4.0
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer: Output #0, mp4, to '/sdcard/test3.mp4':
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:0
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 0, 0/0
    
02-03 18:09:44.199 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Unknown: none
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer:     Stream #0:1
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer: , 0, 0/0
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer: : Unknown: none
    
02-03 18:09:44.200 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [file @ 0xdbdc71e0] Setting default whitelist 'file,crypto'
    
02-03 18:09:44.201 24571-24571/com.zhenbeiju.avplayer E/videoplayer: [mp4 @ 0xebf3a800] Could not find tag for codec none in stream #0, codec not currently supported in container
    
02-03 18:09:44.201 24571-24571/com.zhenbeiju.avplayer E/videoplayer: Error occurred when opening output file : Invalid argument

  • Anomalie #3875 : Impossible de voir les sous-rubriques

    9 février 2017, par denis -

    Juste pour préciser /158 donne en fait l’url complète /prog/2017/158/ qui pointe bien vers une rubrique.

    Et ça ne semble pas lié aux chiffres, si je crée une rubrique qui donne comme url coucou-coucou, j’ai bien accès à un article prog/2017/coucou-coucou/bonjour, si je la renomme en coucou l’url prog/2017/coucou/bonjour donne une erreur.

    C’est sans doute très marginal de se retrouver avec 2 urls /xxx et /xxx-xxx

Navigation