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  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • (Dés)Activation de fonctionnalités (plugins)

    18 février 2011, par

    Pour gérer l’ajout et la suppression de fonctionnalités supplémentaires (ou plugins), MediaSPIP utilise à partir de la version 0.2 SVP.
    SVP permet l’activation facile de plugins depuis l’espace de configuration de MediaSPIP.
    Pour y accéder, il suffit de se rendre dans l’espace de configuration puis de se rendre sur la page "Gestion des plugins".
    MediaSPIP est fourni par défaut avec l’ensemble des plugins dits "compatibles", ils ont été testés et intégrés afin de fonctionner parfaitement avec chaque (...)

  • Activation de l’inscription des visiteurs

    12 avril 2011, par

    Il est également possible d’activer l’inscription des visiteurs ce qui permettra à tout un chacun d’ouvrir soit même un compte sur le canal en question dans le cadre de projets ouverts par exemple.
    Pour ce faire, il suffit d’aller dans l’espace de configuration du site en choisissant le sous menus "Gestion des utilisateurs". Le premier formulaire visible correspond à cette fonctionnalité.
    Par défaut, MediaSPIP a créé lors de son initialisation un élément de menu dans le menu du haut de la page menant (...)

Sur d’autres sites (10602)

  • ffmpeg : Convert a legally purchased video on Google

    24 avril 2020, par Heycava

    I've bought a video on the Google Play Store. I need to have it on my computer in order to edit it for a video montage. But Google says "Important : You cannot download movies and TV shows onto a PC, Mac, and other laptops or computers."

    



    The video has a YouTube link. As I paid for it, I can watch it. I've managed to get the video part and the audio thanks to some web tools.
The video is a .webm file and the audio a .m4a file.

    



    I can hear the audio with VLC but I can't watch the video. Even if VLC displays "21:42" for the timecode.

    



    Here are informations for the webm file (from MediaInfo) :

    



    General
Complete name                            : XXX\videoplayback.webm
Format                                   : WebM
Format version                           : Version 4 / Version 2
File size                                : 357 MiB
Duration                                 : 21 min 42 s
Overall bit rate                         : 2 301 kb/s
Writing application                      : google/video-file
Writing library                          : google/video-file

Video
ID                                       : 1
Format                                   : VP9
Codec ID                                 : V_VP9
Duration                                 : 21 min 42 s
Bit rate                                 : 2 203 kb/s
Width                                    : 854 pixels
Height                                   : 480 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Bits/(Pixel*Frame)                       : 0.224
Stream size                              : 342 MiB (96%)
Language                                 : English
Default                                  : Yes
Forced                                   : No


    



    It seems to be a good video file.

    



    I wanted to convert it with some video converters but none of them works. So I've tried to download ffmpeg, I renamed the video to "video.webm" and tried a lot of commands. But none of them worked.

    



    Here are informations from ffprobe command :

    



    C:\Users\XXX\Downloads\ffmpeg-20200424-a501947-win64-static\bin>ffprobe -i video.webm


    



    Results :

    



    ffprobe version git-2020-04-24-a501947 Copyright (c) 2007-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200328
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 42.102 / 56. 42.102
  libavcodec     58. 81.100 / 58. 81.100
  libavformat    58. 42.101 / 58. 42.101
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 79.100 /  7. 79.100
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[vp9 @ 00000284720d5f40] Invalid frame marker
    Last message repeated 111 times
[vp9 @ 00000284720d5f40] Profile 4 is not yet supported
[vp9 @ 00000284720d5f40] Invalid frame marker
    Last message repeated 6 times
[matroska,webm @ 00000284720cd840] decoding for stream 0 failed
[matroska,webm @ 00000284720cd840] Could not find codec parameters for stream 0 (Video: vp9 (Profile 0), none, 854x480): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, matroska,webm, from 'video.webm':
  Metadata:
    encoder         : google/video-file
  Duration: 00:21:42.05, start: 0.000000, bitrate: 2301 kb/s
    Stream #0:0(eng): Video: vp9 (Profile 0), none, 854x480, SAR 1:1 DAR 427:240, 23.98 fps, 23.98 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      enc_key_id      : [24 characters I prefer not to display]


    



    If ever I initiate a conversion, I get :

    



    [vp9 @ 0000019038a80980] Invalid frame marker
[vp9 @ 0000019038c0fe40] Invalid frame marker
[vp9 @ 0000019038c193c0] Invalid frame marker
[vp9 @ 0000019038c1e780] Invalid frame marker
[vp9 @ 0000019038c29100] Invalid frame marker
[vp9 @ 0000019038c324c0] Invalid frame marker
[vp9 @ 0000019038c3d480] Invalid frame marker
[vp9 @ 0000019038c47280] Invalid frame marker
Error while decoding stream #0:0: Invalid data found when processing input
[vp9 @ 0000019038c4c080] Invalid frame marker
Error while decoding stream #0:0: Invalid data found when processing input
[vp9 @ 0000019038a80980] Invalid frame marker


    



    etc.
Then :

    



    Error while decoding stream #0:0: Resource temporarily unavailable
    Last message repeated 243 times
Error while decoding stream #0:0: Resource temporarily unavailabletrate=  -0.0kbits/s speed=N/A
    Last message repeated 306 times
Error while decoding stream #0:0: Resource temporarily unavailabletrate=  -0.0kbits/s speed=N/A
    Last message repeated 190 times


    



    I've already checked on the Internet solutions for the raised issues :

    



      

    • Invalid frame marker

      • 


    • unspecified pixel format

      • 


    • Consider increasing the value for the 'analyzeduration' and 'probesize' options

      • 


    



    But it didn't work in my case.

    



    Obviously, I can watch the video on YouTube when I'm logged into my purchase account. I presume they have a high level security algorithm, that's why I can't do nothing. Mayve there is something with the "enc_key_id" in the metadata, they get it and the video can only be read with it. I don't know.

    



    I find it unacceptable not to be able to use freely my purchased videos.

    



    Would anyone have an idea ?

    


  • ffmpeg overlay timing issue

    22 avril 2020, par Mario Iannotta

    I'm trying to add a png as overlay to a mov video with ffmpeg (version 4.2.2) using the following command :

    



    ffmpeg -i ./input.mov -i ./overlay.png -y -filter_complex "overlay=enable='between(t,1,4)'" ./output.mp4

    



    Now my understanding of overlay=enable='between(t,1,4) is that the overlay will be added at one second and will be removed at 4 seconds since the begin of the video but the output is somehow different.

    



    The overlay is added at roughly 2:66 and it is removed at 5:14.

    



    Trying with different values result in even more confusing outputs.

    



    eg :

    



      


    • between(t,3,10) —> 3:12 | 11:05

      • 


    • between(t,2,7) —> 2:65 | 7:22

      • 


    • between(t,1,2) —> the overlay is not added ad all

      • 


    



    The metadata of the input video are the following

    



      Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2020-04-19T08:09:00.000000Z
  Duration: 00:00:14.84, start: 0.053333, bitrate: 849 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt709/unknown), 828x1792 [SAR 1:1 DAR 207:448], 848 kb/s, 23.34 fps, 600 tbr, 600 tbn, 1200 tbc (default)
    Metadata:
      creation_time   : 2020-04-19T08:09:00.000000Z
      handler_name    : Core Media Video
      encoder         : H.264


    



    I also tried to convert the video to mp4 (with ffmpeg -i input.mov -vcodec copy -acodec copy out.mp4) before applying the overlay but the issue is still there.

    



    Edit : I downloaded a test mp4 video and the command is working as expected so it is definitely something wrong with my input video. Any idea what it is ?

    



    Edit 2 : Here's the output of ffmpeg command :

    



    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 './input.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2020-04-22T07:49:31.000000Z
  Duration: 00:00:17.80, start: 0.051667, bitrate: 1097 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/unknown/unknown), 750x1334 [SAR 1:1 DAR 375:667], 1097 kb/s, 12.96 fps, 60 tbr, 600 tbn, 1200 tbc (default)
    Metadata:
      creation_time   : 2020-04-22T07:49:31.000000Z
      handler_name    : Core Media Video
      encoder         : H.264
Input #1, png_pipe, from './overlay.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 83x128, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 (h264) -> overlay:main
  Stream #1:0 (png) -> overlay:overlay
  overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x7fcad0001200] using SAR=1/1
[libx264 @ 0x7fcad0001200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fcad0001200] profile High, level 4.0
[libx264 @ 0x7fcad0001200] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - 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=18 lookahead_threads=3 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 './output.mp4':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 750x1334 [SAR 1:1 DAR 375:667], q=-1--1, 60 fps, 15360 tbn, 60 tbc (default)
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=  326 fps=0.0 q=31.0 size=       0kB time=00:00:04.35 bitrate=   0.1kbits/frame=  499 fps=461 q=31.0 size=     256kB time=00:00:07.23 bitrate= 290.0kbits/frame=  830 fps=494 q=31.0 size=     512kB time=00:00:12.75 bitrate= 329.0kbits/frame=  956 fps=491 q=-1.0 Lsize=     593kB time=00:00:15.88 bitrate= 306.0kbits/s dup=726 drop=0 speed=8.16x
video:581kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.030694%
[libx264 @ 0x7fcad0001200] frame I:6     Avg QP:18.73  size: 30783
[libx264 @ 0x7fcad0001200] frame P:288   Avg QP:21.57  size:  1150
[libx264 @ 0x7fcad0001200] frame B:662   Avg QP:30.94  size:   119
[libx264 @ 0x7fcad0001200] consecutive B-frames:  4.9%  6.9%  4.1% 84.1%
[libx264 @ 0x7fcad0001200] mb I  I16..4: 19.1% 64.5% 16.4%
[libx264 @ 0x7fcad0001200] mb P  I16..4:  0.8%  0.9%  0.5%  P16..4:  2.4%  0.4%  0.1%  0.0%  0.0%    skip:94.9%
[libx264 @ 0x7fcad0001200] mb B  I16..4:  0.0%  0.1%  0.0%  B16..8:  1.8%  0.0%  0.0%  direct: 0.0%  skip:98.0%  L0:43.8% L1:55.9% BI: 0.3%
[libx264 @ 0x7fcad0001200] 8x8 transform intra:53.9% inter:64.1%
[libx264 @ 0x7fcad0001200] coded y,uvDC,uvAC intra: 18.2% 20.8% 13.9% inter: 0.1% 0.4% 0.1%
[libx264 @ 0x7fcad0001200] i16 v,h,dc,p: 35% 63%  1%  1%
[libx264 @ 0x7fcad0001200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 48% 17% 29%  1%  1%  1%  1%  1%  1%
[libx264 @ 0x7fcad0001200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 32% 15%  3%  4%  4%  3%  3%  3%
[libx264 @ 0x7fcad0001200] i8c dc,h,v,p: 71% 21%  7%  1%
[libx264 @ 0x7fcad0001200] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fcad0001200] ref P L0: 74.6%  4.0% 13.4%  8.0%
[libx264 @ 0x7fcad0001200] ref B L0: 80.0% 17.6%  2.3%
[libx264 @ 0x7fcad0001200] ref B L1: 97.6%  2.4%
[libx264 @ 0x7fcad0001200] kb/s:298.58


    


  • avcodec/adpcm_ima_{apc, ssi, oki} : replace while() with for()

    18 avril 2020, par Zane van Iperen
    avcodec/adpcm_ima_apc, ssi, oki : replace while() with for()

    Per discussion at https://ffmpeg.org/pipermail/ffmpeg-devel/2020-April/260854.html
    

    Signed-off-by : Zane van Iperen <zane@zanevaniperen.com>
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/adpcm.c

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