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Autres articles (106)

  • 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 (...)

  • 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

  • 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

Sur d’autres sites (13500)

  • avformat/utils : Check end time in avpriv_new_chapter()

    23 mai 2014, par Michael Niedermayer
    avformat/utils : Check end time in avpriv_new_chapter()

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavformat/utils.c

  • How to get time stamp of closet k-frame before a given timestamp with ffmpeg ?

    20 février 2013, par jAckOdE

    I want a ffmpeg seeking command that fast and accurate. I found this

    The solution is that we apply -ss for both input (fast seeking) and output (accurate seeking). The question is that if the input seeking is not accurate how can we be sure that the seeking position is accurate.

    For example : as the example used in the link, if we want to seek to 00:03:00, the command is something likes

    ffmpeg -ss 00:02:30 -i ... -ss 00:00:30
    As said, the first seeking will seek to somewhere else not 00:02:30, say 00:02:31. and after applying second seek, the final result would be 00:03:01- NOT what we want. Is that correct ?

    Where does fist seeking seek to ? Does it seek to k-frame that closet to 00:02:30 ?

    If so, here is my thought, correct me if i'm wrong : after first seeking, we get the timestamp of the result (in this example : 00:02:31), then we apply second seeking with appropriate time, in this case 00:00:29.

    Question is how do we get time stamp of first seeking's result ?

  • ffmpeg and streaming video - frame time issue

    6 mai 2014, par 4ntoine

    I’ve compiled ffmpeg-android (https://github.com/appunite/AndroidFFmpeg) and it works for files.
    The problem is that it shows nothing for network streams (both rtmp and hls) as frame timestamp is too big and it seems to be not from video beginning (as for file). Then it waits for the first frame time which for network stream is too big :

    player_decode_video copying...
    
05-05 18:11:26.994: INFO/player.c(16998): player_decode_video Decoded video frame: 568.233000, time_base: 51140970
    
05-05 18:11:26.994: INFO/player.c(16998): player_wait_for_frame[0] start
    
...
    
05-05 18:11:30.587: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (0.000977)
    
05-05 18:11:30.587: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 568232023
    
05-05 18:11:31.088: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:31.088: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (0.501542)
    
05-05 18:11:31.088: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 567731458
    
05-05 18:11:31.588: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:31.588: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (1.002778)
    
05-05 18:11:31.588: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 567230222
    
05-05 18:11:32.089: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:32.089: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (1.504563)
    
05-05 18:11:32.089: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 566728437
    
05-05 18:11:32.590: INFO/player.c(16998): player_wait_for_frame[0] timeout
    
05-05 18:11:32.590: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (568.233000) - (2.005708)
    
05-05 18:11:32.590: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: 566227292

    also i can’t figure out what timestamp for frame for network stream means (for file frames it’s a time from video beginning)

    for file it’s clear : time_base is frame number and timestamp is time from video beginning and it plays the files :

    player_decode_video Decoded video frame: 0.320000, time_base: 8
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.320000) - (0.344337)
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -24337
    
05-05 18:32:42.344: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_update_time: 0.346169/4.000000
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.344: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.344: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.344: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.344: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode_video Decoded video frame: 0.360000, time_base: 9
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.360000) - (0.427994)
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -67994
    
05-05 18:32:42.425: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_update_time: 0.429214/4.000000
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.425: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.425: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.435: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.435: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.435: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video Decoded video frame: 0.400000, time_base: 10
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.400000) - (0.494742)
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -94742
    
05-05 18:32:42.495: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_update_time: 0.495993/4.000000
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.495: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.495: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.495: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.495: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode_video Decoded video frame: 0.440000, time_base: 11
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0] start
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0 = Video] = (0.440000) - (0.556698)
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0] Waiting for frame: sleeping: -116698
    
05-05 18:32:42.555: INFO/player.c(16998): player_wait_for_frame[0] finish[0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_update_time: 0.557858/4.000000
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode waiting for frame[0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream Read frame
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream looking for stream
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream stream found [0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_read_from_stream waiting for queue
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode decoding frame[0]
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode_video decoding
    
05-05 18:32:42.555: INFO/player.c(16998): player_decode_video copy wait
    
05-05 18:32:42.565: INFO/player.c(16998): Format: WINDOW_FORMAT_RGBA_8888
    
05-05 18:32:42.565: INFO/player.c(16998): Buffer: width: 1280, height: 720, stride: 1280
    
05-05 18:32:42.565: INFO/player.c(16998): player_decode_video copying...
    
05-05 18:32:42.625: INFO/player.c(16998): player_decode_video Decoded video frame: 0.480000, time_base: 12

    So what is the meaning of timestamp for stream and what should i change to make it playing streams (rtmp/hls - its can be opened now but it wait for frame time which is far in the future) ?

    UPDATE :

        int64_t pts = av_frame_get_best_effort_timestamp(frame);
    
if (pts == AV_NOPTS_VALUE) {
    
    pts = 0;
    
}
    
int64_t time = av_rescale_q(pts, stream->time_base, AV_TIME_BASE_Q);
    
LOGI(10,
    
        "player_decode_video Decoded video frame: %f, time_base: %" SCNd64,
    
        time/1000000.0, pts);
    
player_wait_for_frame(player, time, stream_no);

    it extracts time which is far in future :

    player_wait_for_frame[0 = Video] = (568.233000) - (0.000977)

    Is it correct ?

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