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  • 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

  • Ecrire une actualité

    21 juin 2013, par

    Présentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
    Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
    Vous pouvez personnaliser le formulaire de création d’une actualité.
    Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...)

  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

Sur d’autres sites (4308)

  • Encoding H.264 CBR videos with FFmpeg

    3 février 2018, par Cornstalks

    I’m trying to encode a video with ffmpeg into H.264 (via the libx264 library) with a constant bit rate. I know, I know, VBR is often preferred, but for this specific job I’m required to use CBR (just as long as it’s so many kilobytes per second ; it doesn’t have to be an exact kilobytes per frame, afaik). My sample video I’m using to test is from here : http://a1408.g.akamai.net/5/1408/1388/2005110403/1a1a1ad948be278cff2d96046ad90768d848b41947aa1986/sample_iTunes.mov.zip (it comes from http://support.apple.com/kb/HT1425)

    I can get a constant bit rate when encoding the video with MPEG-4 Video (using the commands ffmpeg -i sample_iTunes.mov -b 819968 -minrate 819968 -maxrate 819968 out.mov), and the bit rate is as expected. Reading the video’s specs via the QuickTime Inspector, it’s got a data rate of 844.94 kbit/s. Cool.

    However, when I change the codec to libx264, it seems to completely ignore my bitrate requests ! The command I’m trying is "ffmpeg -i sample_iTunes.mov -vcodec libx264 -vpre medium -b 819968 -vb 819968 -minrate 819968 -maxrate 819968 -bufsize 400000 test.mov". But when I check the video’s specs via the QuickTime Inspector, it’s got a data rate of 254.74 kbit/s. WTF ? That’s not even close !

    I’ve tried changing so many parameters and adding tons of different things, and I’ve spent 2 days googling this, but I can’t seem to get it to work. If I encode the video with the MainConcept H.264 encoder, I can get a constant bitrate, but I need this to work with ffmpeg.

    If someone can help me figure out how to do CBR H.264 encoding with FFmpeg, I will love you forever !

  • FFMPEG conversion error from MKV to MP4 using libfdk_aac codec

    23 août 2014, par Charlie Brown

    The purpose of doing this is because my "Smart" samsung TV doesn’t play MKV files.

    This thread mentions that there is no need for video conversion, just changing the container might suffice. After reading multiple threads on how to change the container of MKV to MP4, I downloaded and compiled the FFMPEG with libfdk_aac support from here. I tried converting a sample MKV file using this command :

    ffmpeg -i "C:\VideoTest\Sample1.mkv" -c:v copy -c:a libfdk_aac -b:a 384k "C:\VideoTest\Sample2.mp4"

    but getting the following errors (copied from command prompt) :

    [hevc @ 0000000000308ae0] Could not find ref with POC 113
    
[hevc @ 0000000000308ae0] Could not find ref with POC 111
    
[hevc @ 0000000000308ae0] Could not find ref with POC 109
    
[hevc @ 0000000000308ae0] Could not find ref with POC 107
    
Input #0, matroska,webm, from 'C:\VideoTest\Sample-1.mk
    
v':
    
  Metadata:
    
    encoder         : libebml v1.3.0 + libmatroska v1.4.1
    
    creation_time   : 2014-07-16 08:54:02
    
  Duration: 00:00:58.68, start: 0.042000, bitrate: 3520 kb/s
    
    Chapter #0.0: start 0.000000, end 58.717000
    
    Metadata:
    
      title           : Chapter 4
    
    Stream #0:0: Video: hevc (Main), yuv420p(tv), 1920x816, SAR 1:1 DAR 40:17, 2
    
4 fps, 24 tbr, 1k tbn, 1k tbc (default)
    
    Metadata:
    
      _STATISTICS_WRITING_APP: mkvmerge v7.0.0 ('Where We Going') 64bit built on
    
 Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_APP-eng: mkvmerge v7.0.0 ('Where We Going') 64bit buil
    
t on Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_DATE_UTC: 2014-07-16 08:54:02
    
      _STATISTICS_WRITING_DATE_UTC-eng: 2014-07-16 08:54:02
    
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      BPS             : 2733260
    
      BPS-eng         : 2733260
    
      DURATION        : 00:00:58.667000000
    
      DURATION-eng    : 00:00:58.667000000
    
      NUMBER_OF_FRAMES: 1408
    
      NUMBER_OF_FRAMES-eng: 1408
    
      NUMBER_OF_BYTES : 20044023
    
      NUMBER_OF_BYTES-eng: 20044023
    
    Stream #0:1: Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 768 kb/s (default)
    

    
    Metadata:
    
      _STATISTICS_WRITING_APP: mkvmerge v7.0.0 ('Where We Going') 64bit built on
    
 Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_APP-eng: mkvmerge v7.0.0 ('Where We Going') 64bit buil
    
t on Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_DATE_UTC: 2014-07-16 08:54:02
    
      _STATISTICS_WRITING_DATE_UTC-eng: 2014-07-16 08:54:02
    
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      BPS             : 767986
    
      BPS-eng         : 767986
    
      DURATION        : 00:00:58.625000000
    
      DURATION-eng    : 00:00:58.625000000
    
      NUMBER_OF_FRAMES: 5496
    
      NUMBER_OF_FRAMES-eng: 5496
    
      NUMBER_OF_BYTES : 5627904
    
      NUMBER_OF_BYTES-eng: 5627904
    
    Stream #0:2(eng): Subtitle: hdmv_pgs_subtitle, 1920x1080 (default)
    
    Metadata:
    
      _STATISTICS_WRITING_APP: mkvmerge v7.0.0 ('Where We Going') 64bit built on
    
 Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_APP-eng: mkvmerge v7.0.0 ('Where We Going') 64bit buil
    
t on Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_DATE_UTC: 2014-07-16 08:54:02
    
      _STATISTICS_WRITING_DATE_UTC-eng: 2014-07-16 08:54:02
    
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      BPS             : 17485
    
      BPS-eng         : 17485
    
      DURATION        : 00:00:56.750000000
    
      DURATION-eng    : 00:00:56.750000000
    
      NUMBER_OF_FRAMES: 40
    
      NUMBER_OF_FRAMES-eng: 40
    
      NUMBER_OF_BYTES : 124036
    
      NUMBER_OF_BYTES-eng: 124036
    
Output #0, mp4, to 'C:\VideoTest\Sample.mp4':
    
  Metadata:
    
    encoder         : Lavf56.1.100
    
    Chapter #0.0: start 0.000000, end 58.675000
    
    Metadata:
    
      title           : Chapter 4
    
    Stream #0:0: Video: hevc ([35][0][0][0] / 0x0023), yuv420p, 1920x816 [SAR 1:
    
1 DAR 40:17], q=2-31, 24 fps, 16k tbn, 1k tbc (default)
    
    Metadata:
    
      _STATISTICS_WRITING_APP: mkvmerge v7.0.0 ('Where We Going') 64bit built on
    
 Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_APP-eng: mkvmerge v7.0.0 ('Where We Going') 64bit buil
    
t on Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_DATE_UTC: 2014-07-16 08:54:02
    
      _STATISTICS_WRITING_DATE_UTC-eng: 2014-07-16 08:54:02
    
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      BPS             : 2733260
    
      BPS-eng         : 2733260
    
      DURATION        : 00:00:58.667000000
    
      DURATION-eng    : 00:00:58.667000000
    
      NUMBER_OF_FRAMES: 1408
    
      NUMBER_OF_FRAMES-eng: 1408
    
      NUMBER_OF_BYTES : 20044023
    
      NUMBER_OF_BYTES-eng: 20044023
    
    Stream #0:1: Audio: aac (libfdk_aac) ([64][0][0][0] / 0x0040), 48000 Hz, 5.1
    
, s16, 128 kb/s (default)
    
    Metadata:
    
      _STATISTICS_WRITING_APP: mkvmerge v7.0.0 ('Where We Going') 64bit built on
    
 Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_APP-eng: mkvmerge v7.0.0 ('Where We Going') 64bit buil
    
t on Jun  9 2014 15:16:27
    
      _STATISTICS_WRITING_DATE_UTC: 2014-07-16 08:54:02
    
      _STATISTICS_WRITING_DATE_UTC-eng: 2014-07-16 08:54:02
    
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    
      BPS             : 767986
    
      BPS-eng         : 767986
    
      DURATION        : 00:00:58.625000000
    
      DURATION-eng    : 00:00:58.625000000
    
      NUMBER_OF_FRAMES: 5496
    
      NUMBER_OF_FRAMES-eng: 5496
    
      NUMBER_OF_BYTES : 5627904
    
      NUMBER_OF_BYTES-eng: 5627904
    
      encoder         : Lavc56.0.101 libfdk_aac
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (dts (dca) -> aac (libfdk_aac))
    
Press [q] to stop, [?] for help
    
[mp4 @ 0000000003be0500] Invalid DTS: 656 PTS: -672 in output stream 0:0
    
av_interleaved_write_frame(): Invalid argument
    
[libfdk_aac @ 00000000042fa640] Trying to remove 1024 samples, but the queue is
    
empty
    
[mp4 @ 0000000003be0500] Encoder did not produce proper pts, making some up.
    
[libfdk_aac @ 00000000042fa640] Trying to remove 1024 samples, but the queue is
    
empty
    
frame=    2 fps=0.0 q=-1.0 Lsize=      96kB time=00:00:00.04 bitrate=18415.0kbit
    
s/s
    
video:95kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB muxing ov
    
erhead: 0.570364%
    
Conversion failed!

    Also tried using this command :

    ffmpeg -i input.wav -c:a libfdk_aac -b:a 128k output.mp4

    But this screws up the video quality and I start seeing some bad pixelated patches during the playback.

    Any help would be appreciated.

    Just an FYI : I got this far by reading blogs and posts. I have 0 knowledge about video conversion.

  • TCP connection refused when using ffserver / ffmpeg and errors

    21 octobre 2017, par Skysurf

    If I run

     ffserver -f /etc/ffserver.conf & ffmpeg -f v4l2 -s 320x240 -r 25 -i /dev/video0 -f alsa -ac 1 -i hw:1,0 http://localhost:8090/feed1.ffm
    
[2] 1408
    
ffserver version N-87737-g0a499d6a57 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516
    
  configuration:
    
  libavutil      55. 77.101 / 55. 77.101
    
  libavcodec     57.106.104 / 57.106.104
    
  libavformat    57. 82.102 / 57. 82.102
    
  libavdevice    57.  9.101 / 57.  9.101
    
  libavfilter     6.106.100 /  6.106.100
    
  libswscale      4.  7.103 /  4.  7.103
    
  libswresample   2.  8.100 /  2.  8.100
    
/etc/ffserver.conf:167: Setting default value for video bit rate tolerance = 1000. Use NoDefaults to disable it.
    
/etc/ffserver.conf:167: Setting default value for video rate control equation = tex^qComp. Use NoDefaults to disable it.
    
/etc/ffserver.conf:167: Setting default value for video max rate = 24952432. Use NoDefaults to disable it.
    
/etc/ffserver.conf:222: Setting default value for audio sample rate = 22050. Use NoDefaults to disable it.
    
/etc/ffserver.conf:222: Setting default value for audio channel count = 1. Use NoDefaults to disable it.
    
/etc/ffserver.conf:222: Setting default value for video bit rate tolerance = 64000. Use NoDefaults to disable it.
    
/etc/ffserver.conf:222: Setting default value for video rate control equation = tex^qComp. Use NoDefaults to disable it.
    
/etc/ffserver.conf:222: Setting default value for video max rate = 24994880. Use NoDefaults to disable it.
    
Thu Oct 19 23:34:19 2017 Codecs do not match for stream 0
    
Thu Oct 19 23:34:19 2017 [ffm @ 0x17cb630]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
Thu Oct 19 23:34:19 2017 [ffm @ 0x17cb630]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
Thu Oct 19 23:34:19 2017 [ffm @ 0x17cb630]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
Thu Oct 19 23:34:19 2017 [ffm @ 0x17cb630]Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
    
bind(port 8090): Address already in use
    
Thu Oct 19 23:34:19 2017 Could not start server
    
ffmpeg version N-87737-g0a499d6a57 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1) 20170516
    
  configuration:
    
  libavutil      55. 77.101 / 55. 77.101
    
  libavcodec     57.106.104 / 57.106.104
    
  libavformat    57. 82.102 / 57. 82.102
    
  libavdevice    57.  9.101 / 57.  9.101
    
  libavfilter     6.106.100 /  6.106.100
    
  libswscale      4.  7.103 /  4.  7.103
    
  libswresample   2.  8.100 /  2.  8.100
    
[video4linux2,v4l2 @ 0x23d12f0] The driver changed the time per frame from 1/25 to 1/30
    
Input #0, video4linux2,v4l2, from '/dev/video0':
    
  Duration: N/A, start: 92101.062574, bitrate: 36864 kb/s
    
    Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 36864 kb/s, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
    
Guessed Channel Layout for Input Stream #1.0 : mono
    
Input #1, alsa, from 'hw:1,0':
    
  Duration: N/A, start: 1508452461.198008, bitrate: 768 kb/s
    
    Stream #1:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
    
[tcp @ 0x23d5710] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
    
Thu Oct 19 23:34:21 2017 127.0.0.1 - - [GET] "/feed1.ffm HTTP/1.1" 200 4175
    
[tcp @ 0x2409c20] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
    
Stream mapping:
    
  Stream #1:0 -> #0:0 (pcm_s16le (native) -> mp2 (native))
    
  Stream #0:0 -> #0:1 (rawvideo (native) -> mpeg1video (native))
    
  Stream #1:0 -> #0:2 (pcm_s16le (native) -> wmav2 (native))
    
  Stream #0:0 -> #0:3 (rawvideo (native) -> msmpeg4v3 (msmpeg4))
    
Press [q] to stop, [?] for help
    
[alsa @ 0x23d3500] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
    
[mpeg1video @ 0x23f0880] MPEG-1/2 does not support 3/1 fps
    
Error initializing output stream 0:1 -- Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height
    
Thu Oct 19 23:34:22 2017 127.0.0.1 - - [POST] "/feed1.ffm HTTP/1.1" 200 0
    
[video4linux2,v4l2 @ 0x23d12f0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
    
[video4linux2,v4l2 @ 0x23d12f0] Some buffers are still owned by the caller on close.
    
Conversion failed!
    
[2]+  Exit 1                  ffserver -f /etc/ffserver.conf

    anyone can solve this please ?
    thanks.

    enter link description here

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