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  • L’utiliser, en parler, le critiquer

    10 avril 2011

    La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
    Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
    Une liste de discussion est disponible pour tout échange entre utilisateurs.

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Mediabox : ouvrir les images dans l’espace maximal pour l’utilisateur

    8 février 2011, par

    La visualisation des images est restreinte par la largeur accordée par le design du site (dépendant du thème utilisé). Elles sont donc visibles sous un format réduit. Afin de profiter de l’ensemble de la place disponible sur l’écran de l’utilisateur, il est possible d’ajouter une fonctionnalité d’affichage de l’image dans une boite multimedia apparaissant au dessus du reste du contenu.
    Pour ce faire il est nécessaire d’installer le plugin "Mediabox".
    Configuration de la boite multimédia
    Dès (...)

Sur d’autres sites (10060)

  • ffmpeg file conversion unreadable [on hold]

    16 août 2015, par rashadb

    I used ffmpeg to shorten a Videohive file from 14 seconds to 5 seconds with the following entry on the command line :

    ffmpeg -i 15_Shopping_VKV.mov -t 5 shoes.mp4

    The file doesn’t work when I try to play it with Quicktime. Along with other Google searches, I looked at the following links in Stackoverflow for suggestions :

    https://stackoverflow.com/questions/25831944/unreadable-files
    https://stackoverflow.com/questions/4818681/ffmpeg-conversion-error
    https://stackoverflow.com/questions/22307229/ffmpeg-mp4-file-is-not-valid

    At this point I’m out of ideas to figure out what’s wrong, let alone how to fix the problem.

    Here are some additional details :

    I managed to edit a few other Videohive files but each file comes in slightly different format and although I’ve converted a number of other files with a similar entry or one that adjusts the codec to something web ready, I’ve been unable to successfully convert this file. Like all of the other original videohive files it is readily read by QuickTime. Only after the conversion does this file not work. All other files I’ve converted worked with the following conversions for example :

    ffmpeg -i mainfile.mp4 -t 5:00 rave.mp4

    OR

    ffmpeg -i 00299.mov -c:v libx264 dating.mp4

    Here are a few additional details that may help :

    1) a link to the broken file

    https://s3.amazonaws.com/files.parsetfss.com/90b6030c-d712-42ec-b2ee-deb43a4dd277/tfss-79b45914-9ada-4c1c-8fbc-8d652f8c00c7-shoes.mp4

    2) The printout of ffmpeg process

    News-MacBook-Air:CP08.14.15 newuser$ ffmpeg -i 15_Shopping_VKV.mov  -t 5  shoes.mov
    ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
     built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
     configuration: --prefix=/usr/local/Cellar/ffmpeg/2.7.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libass --enable-ffplay --enable-libspeex --enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 ' --enable-nonfree --enable-vda
     libavutil      54. 27.100 / 54. 27.100
     libavcodec     56. 41.100 / 56. 41.100
     libavformat    56. 36.100 / 56. 36.100
     libavdevice    56.  4.100 / 56.  4.100
     libavfilter     5. 16.101 /  5. 16.101
     libavresample   2.  1.  0 /  2.  1.  0
     libswscale      3.  1.101 /  3.  1.101
     libswresample   1.  2.100 /  1.  2.100
     libpostproc    53.  3.100 / 53.  3.100
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '15_Shopping_VKV.mov':
     Metadata:
       major_brand     : qt  
       minor_version   : 537199360
       compatible_brands: qt  
       creation_time   : 2015-03-07 22:03:36
     Duration: 00:00:14.71, start: 0.000000, bitrate: 78240 kb/s
       Stream #0:0(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj422p(pc, bt470bg/bt709/bt709), 1920x1080 [SAR 72:72 DAR 16:9], 78231 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
       Metadata:
         creation_time   : 2015-03-07 22:03:36
         handler_name    : Apple Alias Data Handler
         encoder         : Photo - JPEG
         timecode        : 00:02:36;02
       Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
       Metadata:
         creation_time   : 2015-03-07 22:15:55
         handler_name    : Apple Alias Data Handler
         timecode        : 00:02:36;02
    File 'shoes.mov' already exists. Overwrite ? [y/N] y
    No pixel format specified, yuvj422p for H.264 encoding chosen.
    Use -pix_fmt yuv420p for compatibility with outdated media players.
    [libx264 @ 0x7fbc9400a000] using SAR=1/1
    [libx264 @ 0x7fbc9400a000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    [libx264 @ 0x7fbc9400a000] profile High 4:2:2, level 4.0, 4:2:2 8-bit
    [libx264 @ 0x7fbc9400a000] 264 - core 144 r2533 c8a773e - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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, mov, to 'shoes.mov':
     Metadata:
       major_brand     : qt  
       minor_version   : 537199360
       compatible_brands: qt  
       encoder         : Lavf56.36.100
       Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuvj422p(pc), 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 30k tbn, 29.97 tbc (default)
       Metadata:
         creation_time   : 2015-03-07 22:03:36
         handler_name    : Apple Alias Data Handler
         timecode        : 00:02:36;02
         encoder         : Lavc56.41.100 libx264
    Stream mapping:
     Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
    Press [q] to stop, [?] for help
    frame=  150 fps=6.9 q=-1.0 Lsize=    3953kB time=00:00:04.93 bitrate=6557.7kbits/s    
    video:3950kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.080847%
    [libx264 @ 0x7fbc9400a000] frame I:1     Avg QP:25.46  size: 71679
    [libx264 @ 0x7fbc9400a000] frame P:72    Avg QP:25.36  size: 40886
    [libx264 @ 0x7fbc9400a000] frame B:77    Avg QP:27.53  size: 13357
    [libx264 @ 0x7fbc9400a000] consecutive B-frames:  0.7% 89.3% 10.0%  0.0%
    [libx264 @ 0x7fbc9400a000] mb I  I16..4: 16.5% 80.0%  3.5%
    [libx264 @ 0x7fbc9400a000] mb P  I16..4:  5.3% 14.6%  0.6%  P16..4: 41.1% 10.6%  3.0%  0.0%  0.0%    skip:24.9%
    [libx264 @ 0x7fbc9400a000] mb B  I16..4:  0.4%  1.2%  0.0%  B16..8: 32.7%  4.0%  0.7%  direct: 2.8%  skip:58.2%  L0:36.3% L1:53.2% BI:10.5%
    [libx264 @ 0x7fbc9400a000] 8x8 transform intra:71.7% inter:86.5%
    [libx264 @ 0x7fbc9400a000] coded y,uvDC,uvAC intra: 52.7% 78.6% 18.2% inter: 14.1% 26.4% 0.4%
    [libx264 @ 0x7fbc9400a000] i16 v,h,dc,p: 26% 18%  5% 51%
    [libx264 @ 0x7fbc9400a000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 24% 13% 20%  4%  8% 12%  6%  8%  5%
    [libx264 @ 0x7fbc9400a000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 15% 12%  4% 14% 14%  7%  5%  2%
    [libx264 @ 0x7fbc9400a000] i8c dc,h,v,p: 45% 12% 27% 16%
    [libx264 @ 0x7fbc9400a000] Weighted P-Frames: Y:0.0% UV:0.0%
    [libx264 @ 0x7fbc9400a000] ref P L0: 65.2% 18.5% 11.3%  5.0%
    [libx264 @ 0x7fbc9400a000] ref B L0: 90.7%  9.1%  0.2%
    [libx264 @ 0x7fbc9400a000] ref B L1: 99.1%  0.9%
    [libx264 @ 0x7fbc9400a000] kb/s:6463.90
  • http: Add the trailing endlines if they are missing

    23 juillet 2015, par Luca Barbato
    http: Add the trailing endlines if they are missing
    

    Makes slightly easier the life of those want to use the option
    from the command line

    • [DBH] libavformat/http.c
  • FFprobe reading incorrect resolution value despite players rendering it correctly

    24 juillet 2015, par Boehmi

    I’m creating a video from a stream with the help of FFMPEG and I also use FFPROBE to gather information for use on a status page like resolution, codecs et cetera.

    When FFProbe parses my video for information, I get a resolution value of 544x576 (almost a square !), but an aspect ratio of 16:9.

    These values are consistent on both the input stream and my saved video.

    When I watch the video in the standard HTML5 Player, VLC or FFPLAY however, I get a video with the proportions of 16:9 and a resolution (measured using an image editing program) of 1024x576 that does look native and not stretched in any way.

    Even if I re-encode the video using slightly different codecs, this incorrect resolution value persists, even though every player I use displays it correctly.

    This is slightly inconvenient because I am relying on getting the correct resolution value from the video for further processing.

    I’m also using a recent FFMPEG+FFPROBE version that was compiled on the 15th of July.

    Is this a bug within FFMPEG or is there anything I’m doing wrong ?

    Used command lines :

    FFMPEG :

    ffmpeg -i source -loglevel debug -vcodec copy -acodec copy -bsf:a aac_adtstoasc -movflags +faststart -t 360 -y video.mp4

    FFPROBE (I parse the output of this directly and save the values) :

    ffprobe -i source -show_format -show_streams

    FFProbe output :

    width=544
    height=576
    coded_width=544
    coded_height=576
    has_b_frames=2
    sample_aspect_ratio=32:17
    display_aspect_ratio=16:9

    I can see that the sample aspect ratio is different from the display aspect ratio, but how come the video looks proper in 16:9 when it’s supposedly encoded at a near square resolution ?