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  • Qu’est ce qu’un éditorial

    21 juin 2013, par

    Ecrivez votre de point de vue dans un article. Celui-ci sera rangé dans une rubrique prévue à cet effet.
    Un éditorial est un article de type texte uniquement. Il a pour objectif de ranger les points de vue dans une rubrique dédiée. Un seul éditorial est placé à la une en page d’accueil. Pour consulter les précédents, consultez la rubrique dédiée.
    Vous pouvez personnaliser le formulaire de création d’un éditorial.
    Formulaire de création d’un éditorial Dans le cas d’un document de type éditorial, les (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Déploiements possibles

    31 janvier 2010, par

    Deux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
    L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
    Version mono serveur
    La version mono serveur consiste à n’utiliser qu’une (...)

Sur d’autres sites (2646)

  • FFmpeg "Illegal instruction" Raspberry Pi Zero W

    20 août 2019, par ErezM

    I’ve been struggling with having FFmpeg run on Pi Zero W, as a newbie I can’t say where the root of the problem whether its the compilation configuration of the FFmpeg or maybe the syntax of the command line itself..

    The current configuration is :

    Raspberry Pi Zero Wireless
    Set GPU memory to 256

    Running OS :

    Linux raspberrypi 4.19.66+ #1253 Thu Aug 15 11:37:30 BST 2019 armv6l GNU/Linux
    

    
PRETTY_NAME="Raspbian GNU/Linux 10 (buster)"
    
NAME="Raspbian GNU/Linux"
    
VERSION_ID="10"
    
VERSION="10 (buster)"
    
VERSION_CODENAME=buster
    
ID=raspbian
    
ID_LIKE=debian
    

    
No LSB modules are available.
    
Distributor ID: Raspbian
    
Description: Raspbian GNU/Linux 10 (buster)
    
Release: 10
    
Codename: buster

    FFmpeg version and configuration :

    ffmpeg version N-94582-gd0fa1a58da Copyright (c) 2000-2019 the FFmpeg developers
    
built with gcc 8 (Raspbian 8.3.0-6+rpi1)
    
configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-omx --enable-omx-rpi --enable-nonfree
    
libavutil 56. 33.100 / 56. 33.100
    
libavcodec 58. 55.100 / 58. 55.100
    
libavformat 58. 31.101 / 58. 31.101
    
libavdevice 58. 9.100 / 58. 9.100
    
libavfilter 7. 58.100 / 7. 58.100
    
libswscale 5. 6.100 / 5. 6.100
    
libswresample 3. 6.100 / 3. 6.100
    
libpostproc 55. 6.100 / 55. 6.100
    
Hyper fast Audio and Video encoder

    Command to copy 30 seconds clip from the 10 second mark :

    sudo ffmpeg -ss 00:00:10 -t 00:00:30 -i GOPR2546.MP4 -c:v libx264 -c:a copy out.MP4

    The FFmpeg output :

    ffmpeg version N-94582-gd0fa1a58da Copyright (c) 2000-2019 the FFmpeg developers
    
built with gcc 8 (Raspbian 8.3.0-6+rpi1)
    
configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-omx --enable-omx-rpi --enable-nonfree
    
libavutil 56. 33.100 / 56. 33.100
    
libavcodec 58. 55.100 / 58. 55.100
    
libavformat 58. 31.101 / 58. 31.101
    
libavdevice 58. 9.100 / 58. 9.100
    
libavfilter 7. 58.100 / 7. 58.100
    
libswscale 5. 6.100 / 5. 6.100
    
libswresample 3. 6.100 / 3. 6.100
    
libpostproc 55. 6.100 / 55. 6.100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x210d360] Using non-standard frame rate 59/1
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'GOPR2546.MP4':
    
Metadata:
    
major_brand : mp41
    
minor_version : 538120216
    
compatible_brands: mp41
    
creation_time : 2019-08-20T11:09:41.000000Z
    
firmware : HD7.01.01.80.00
    
Duration: 00:01:00.84, start: 0.000000, bitrate: 45293 kb/s
    
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 45043 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
    
Metadata:
    
creation_time : 2019-08-20T11:09:41.000000Z
    
handler_name : GoPro AVC
    
encoder : GoPro AVC encoder
    
timecode : 11:20:21:32
    
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
    
Metadata:
    
creation_time : 2019-08-20T11:09:41.000000Z
    
handler_name : GoPro AAC
    
timecode : 11:20:21:32
    
Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    
Metadata:
    
creation_time : 2019-08-20T11:09:41.000000Z
    
handler_name : GoPro TCD
    
timecode : 11:20:21:32
    
Stream #0:3(eng): Data: bin_data (gpmd / 0x646D7067), 41 kb/s (default)
    
Metadata:
    
creation_time : 2019-08-20T11:09:41.000000Z
    
handler_name : GoPro MET
    
Stream #0:4(eng): Data: none (fdsc / 0x63736466), 13 kb/s (default)
    
Metadata:
    
creation_time : 2019-08-20T11:09:41.000000Z
    
handler_name : GoPro SOS
    
Stream mapping:
    
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
Illegal instruction

    The result is an empty out.MP4 file... I’ve tried different configuration but never got it to work.

    the one minute input file i’m using to test can be downloaded from https://dl.dropboxusercontent.com/s/dxd285zrz6d57da/GOPR2546.MP4

    Thank you all in advance !!

  • Media player get stuck in the middle of a buffered range on Chrome

    29 septembre 2019, par Feng Yu

    WHAT IS MY PROBLEM ?

    My website’s live streaming player use hls.js. From my server’s stat, there is many case where player get stuck in the middle of a buffered range.

    Here is my server raw stat log(removed some useless params) :

    tm=2019-09-27 12:04:41`bufferLevel=8.447303999999974`currentTime=158.4`buffered=[6.024,166.832]`readyState=4`ua=Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36 QBCore/3.53.1153.400 QQBrowser/9.0.2524.400 Tencent AppMarket/4.8 GameCenter

    currentTime is got by HTMLMediaElement.currentTime and buffered is got by HTMLMediaElement.buffered :

    currentTime=158.4
    
buffered=[6.024,166.832]
    
readyState=4

    From W3c :

    If HTMLMediaElement.buffered contains a TimeRange that includes the current playback position and enough data to ensure uninterrupted playback :

    1. Set the HTMLMediaElement.readyState attribute to HAVE_ENOUGH_DATA.
    2. Playback may resume at this point if it was previously suspended by a transition to HAVE_CURRENT_DATA.

    In this case, 613.3 is in the middle of [469.277,677.612], video should be progressing, but it is not.

    Hls.js will periodly check currentTime has progressed every 100ms. if currentTime has not progressed for 1000ms, then hls.js will trigger STALL event and I will send a stall stat to server.

    I cannot reproduce this problem on my side, it only appears on my server stat.

    WHAT I’VE TRIED

    shaka player has a module detect this case(https://www.ellealcatrase.eu/player2/docs/api/lib_media_stall_detector.js.html), Its comment shows that :

    Some platforms/browsers can get stuck in the middle of a
    buffered range (e.g. when seeking in a background tab). Detect when
    we get stuck so that the player can respond.

    but I cannot reproduce when my browser is in a background tab.

  • How to convert mp4 file so that it can allow timeline drag in html5 video tag ?

    21 août 2019, par sgon00

    I generated a mp4 file by ffmpeg. And then correct the index by qt-faststart. But now, there is still one problem. In chrome browser, the video timeline can not be dragged. I tried another online video with the same video tag code. (for instance : http://www.w3schools.com/html/movie.mp4). The timeline dragging works fine. Can anyone please teach me how to enable timeine drag for this video ? How can I convert the mp4 file to make it right ? Thanks a lot.

    Updated :

    I kinda found the problem and fixed it. My debug http server is picky. So when I use nginx server, the mp4 video timeline can be draggable.

    But the weird part is the timeline of the movie.mp4 from w3schools.com works in my debug http server. So I don’t know the true cause, but changing to production http server solved the problem.

    • ffmpeg command and output :
    $ ffmpeg -i movie.mp4 -vf yadif=1:tff,zscale=w=320:h=240:f=spline36:r=full,unsharp=luma_msize_x=3:luma_msize_y=3:luma_amount=0.8,interlace notworking.mp4
    

    
ffmpeg version N-93939-g819ed1df94-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
    
  built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
    
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
    
  libavutil      56. 28.100 / 56. 28.100
    
  libavcodec     58. 52.102 / 58. 52.102
    
  libavformat    58. 27.103 / 58. 27.103
    
  libavdevice    58.  7.100 / 58.  7.100
    
  libavfilter     7. 54.101 /  7. 54.101
    
  libswscale      5.  4.101 /  5.  4.101
    
  libswresample   3.  4.100 /  3.  4.100
    
  libpostproc    55.  4.100 / 55.  4.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'movie.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42isomavc1
    
    creation_time   : 2010-05-11T10:32:06.000000Z
    
    encoder         : HandBrake 0.9.4 2009112300
    
  Duration: 00:00:12.61, start: 0.000000, bitrate: 202 kb/s
    
    Chapter #0:0: start 0.000000, end 12.612000
    
    Metadata:
    
      title           :
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 320x240, 80 kb/s, 29.65 fps, 29.97 tbr, 90k tbn, 59.31 tbc (default)
    
    Metadata:
    
      creation_time   : 2010-05-11T10:32:06.000000Z
    
      encoder         : JVT/AVC Coding
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 115 kb/s (default)
    
    Metadata:
    
      creation_time   : 2010-05-11T10:32:06.000000Z
    
    Stream #0:2(und): Data: bin_data (text / 0x74786574), 0 kb/s
    
    Metadata:
    
      creation_time   : 2010-05-11T10:32:06.000000Z
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x7faa5400a800] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x7faa5400a800] profile Progressive High, level 1.3, 4:2:0, 8-bit
    
[libx264 @ 0x7faa5400a800] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'notworking.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42isomavc1
    
    encoder         : Lavf58.27.103
    
    Chapter #0:0: start 0.000000, end 12.612000
    
    Metadata:
    
      title           :
    
    Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 320x240, q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
    
    Metadata:
    
      creation_time   : 2010-05-11T10:32:06.000000Z
    
      encoder         : Lavc58.52.102 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      creation_time   : 2010-05-11T10:32:06.000000Z
    
      encoder         : Lavc58.52.102 aac
    
frame=  378 fps=229 q=-1.0 Lsize=     603kB time=00:00:12.60 bitrate= 391.5kbits/s dup=4 drop=0 speed=7.63x
    
video:388kB audio:199kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.604359%
    
[libx264 @ 0x7faa5400a800] frame I:2     Avg QP:22.49  size: 11066
    
[libx264 @ 0x7faa5400a800] frame P:117   Avg QP:24.98  size:  2340
    
[libx264 @ 0x7faa5400a800] frame B:259   Avg QP:29.82  size:   390
    
[libx264 @ 0x7faa5400a800] consecutive B-frames:  3.7% 10.1% 14.3% 72.0%
    
[libx264 @ 0x7faa5400a800] mb I  I16..4:  1.3% 47.0% 51.7%
    
[libx264 @ 0x7faa5400a800] mb P  I16..4:  0.1%  1.7%  1.2%  P16..4: 49.5% 18.7% 10.5%  0.0%  0.0%    skip:18.3%
    
[libx264 @ 0x7faa5400a800] mb B  I16..4:  0.0%  0.0%  0.1%  B16..8: 51.6%  5.8%  1.5%  direct: 0.9%  skip:40.1%  L0:52.8% L1:43.7% BI: 3.5%
    
[libx264 @ 0x7faa5400a800] 8x8 transform intra:51.8% inter:50.8%
    
[libx264 @ 0x7faa5400a800] coded y,uvDC,uvAC intra: 95.0% 53.2% 17.0% inter: 14.1% 3.7% 0.0%
    
[libx264 @ 0x7faa5400a800] i16 v,h,dc,p:  8% 75%  2% 15%
    
[libx264 @ 0x7faa5400a800] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 42% 10%  5%  4%  3% 10%  4% 14%
    
[libx264 @ 0x7faa5400a800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  9% 36% 13%  5%  6%  5% 11%  4% 11%
    
[libx264 @ 0x7faa5400a800] i8c dc,h,v,p: 62% 24%  9%  5%
    
[libx264 @ 0x7faa5400a800] Weighted P-Frames: Y:0.9% UV:0.9%
    
[libx264 @ 0x7faa5400a800] ref P L0: 72.8%  9.6% 15.4%  2.2%  0.0%
    
[libx264 @ 0x7faa5400a800] ref B L0: 92.4%  7.1%  0.5%
    
[libx264 @ 0x7faa5400a800] ref B L1: 97.7%  2.3%
    
[libx264 @ 0x7faa5400a800] kb/s:251.81
    
[aac @ 0x7faa5500b200] Qavg: 826.560

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