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    13 avril 2011, par

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    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 (...)

  • Amélioration de la version de base

    13 septembre 2013

    Jolie sélection multiple
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    Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (13142)

  • Elimination compression from videos generated from images using ffmpeg ?

    5 novembre 2011, par Magz

    So I'm using ffmpeg to generate videos from a series of images. Unfortunately every video I've generated so far becomes compressed about halfway through (these are about 10-30 second videos). I've tried a lot of different options, but here's an example and the resulting output.

    Any suggestions ?

    ffmpeg -minrate 5000k -maxrate 5000k -bufsize 1835k -b 5000k -s 480x480 \
    
-f image2 -r 10 -i 'dms-%05d.jpeg' output.flv
    

    

    
ffmpeg version 0.8.1, Copyright (c) 2000-2011 the FFmpeg developers
    
  built on Jul 29 2011 14:13:56 with gcc 4.2.1 (Apple Inc. build 5664)
    
  configuration: --enable-libmp3lame --enable-shared --disable-mmx --arch=x86_64
    
  libavutil    51.  9. 1 / 51.  9. 1
    
  libavcodec   53.  7. 0 / 53.  7. 0
    
  libavformat  53.  4. 0 / 53.  4. 0
    
  libavdevice  53.  1. 1 / 53.  1. 1
    
  libavfilter   2. 23. 0 /  2. 23. 0
    
  libswscale    2.  0. 0 /  2.  0. 0
    
[image2 @ 0x101007c00] max_analyze_duration 5000000 reached at 5000000
    
Input #0, image2, from 'dms-%05d.jpeg':
    
  Duration: 00:00:10.00, start: 0.000000, bitrate: N/A
    
    Stream #0.0: Video: mjpeg, yuvj444p, 559x480 [PAR 1:1 DAR 559:480], 10 fps, 10 tbr, 10 tbn, 10 tbc
    
Incompatible pixel format 'yuvj444p' for codec 'flv', auto-selecting format 'yuv420p'
    
[buffer @ 0x100d00230] w:559 h:480 pixfmt:yuvj444p tb:1/1000000 sar:1/1 sws_param:
    
[buffersink @ 0x100d02160] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
    
[scale @ 0x100d023a0] w:559 h:480 fmt:yuvj444p -> w:559 h:480 fmt:yuv420p flags:0x4
    
Output #0, flv, to 'output.flv':
    
  Metadata:
    
    encoder         : Lavf53.4.0
    
    Stream #0.0: Video: flv, yuv420p, 559x480 [PAR 1:1 DAR 559:480], q=2-31, 200 kb/s, 1k tbn, 10 tbc
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
Press [q] to stop, [?] for help
    
[buffer @ 0x100d00230] Buffer video input changed from size:559x480 fmt:yuvj444p to size:480x480 fmt:yuvj420p
    
[scale @ 0x100d023a0] w:480 h:480 fmt:yuvj420p -> w:559 h:480 fmt:yuv420p flags:0x2
    
[buffer @ 0x100d00230] Buffer video input changed from size:480x480 fmt:yuvj420p to size:559x480 fmt:yuvj444p
    
[scale @ 0x100d023a0] w:559 h:480 fmt:yuvj444p -> w:559 h:480 fmt:yuv420p flags:0x2
    
[buffer @ 0x100d00230] Buffer video input changed from size:559x480 fmt:yuvj444p to size:480x480 fmt:yuvj420p
    
[scale @ 0x100d023a0] w:480 h:480 fmt:yuvj420p -> w:559 h:480 fmt:yuv420p flags:0x2
    
[buffer @ 0x100d00230] Buffer video input changed from size:480x480 fmt:yuvj420p to size:559x480 fmt:yuvj444p
    
[scale @ 0x100d023a0] w:559 h:480 fmt:yuvj444p -> w:559 h:480 fmt:yuv420p flags:0x2
    
[buffer @ 0x100d00230] Buffer video input changed from size:559x480 fmt:yuvj444p to size:480x480 fmt:yuvj420p
    
[scale @ 0x100d023a0] w:480 h:480 fmt:yuvj420p -> w:559 h:480 fmt:yuv420p flags:0x2
    
[buffer @ 0x100d00230] Buffer video input changed from size:480x480 fmt:yuvj420p to size:559x480 fmt:yuvj444p
    
[scale @ 0x100d023a0] w:559 h:480 fmt:yuvj444p -> w:559 h:480 fmt:yuv420p flags:0x2
    
frame=  100 fps= 35 q=24.8 Lsize=    1062kB time=00:00:10.00 bitrate= 870.2kbits/s    
    
video:1060kB audio:0kB global headers:0kB muxing overhead 0.166586%

  • Revision 1e30547984 : Skip mode search based on reference frame consistency This commit enables the e

    12 août 2014, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_rdopt.c



    Skip mode search based on reference frame consistency

    This commit enables the encoder to skip NEARMV and ZEROMV if the
    above and left blocks have identical reference frame, and the
    current reference is different from that. It reduces the runtime
    of speed 3 for test sequences :
    bus cif at 1000 kbps 10064 ms -> 9823 ms
    pedestrian 1080p at 2000 kbps 193078 ms -> 189559 ms

    The compression performance is changed by
    derf -0.085%
    stdhd -0.103%

    Change-Id : If304f26d42e6412152a84c3dd7b02635c38444f4

  • Change file format from flv to anything android will play

    19 octobre 2011, par Bilthon

    I need to take this file which encoded is in h264 but in a flv container and just put it in a mp4, 3gp or whatever file format the android MediaPlayer will understand.

    I want to do this natively. As I will not be decoding nor encoding anything I think I will not be wasting a lot of power (am I wrong ?)

    I followed the instructions from here http://www.roman10.net/?p=394 and could sucessfully compile and use ffmpeg and use it with mp4 and 3gp files.

    But when it comes to flv files it fails. I understand there is no format definition for flv files in that specific port of ffmpeg for android.

    There is no libavformat/flv.h header file for instance.

    Maybe that's why this works :

    extern AVInputFormat ff_mov_demuxer ;
    av_register_input_format(&ff_mov_demuxer) ;

    While this fails :

    extern AVInputFormat ff_flv_demuxer;
    
av_register_input_format(&ff_flv_demuxer);

    Question is, is there a light at the end of the tunnel ? has someone done something similar ? is it useful ? I mean, I can always just throw the flv media file into a flash player and voila.. the thing is that this would be a parcial solution, as it will not work for all those folks running slower devices that can't yet run Flash.

    Nelson

    PS. Just in case. Here's some info about the file I'm talking about :

    ffmpeg -i rio.flv 
    
ffmpeg version N-32624-gea8de10, Copyright (c) 2000-2011 the FFmpeg developers
    
  built on Sep 15 2011 23:31:42 with gcc 4.5.2
    
  configuration: --enable-libfaac --enable-libmp3lame --enable-librtmp --enable-libtheora --enable-libx264 --enable-libxvid --enable-gpl --enable-nonfree
    
  libavutil    51. 16. 0 / 51. 16. 0
    
  libavcodec   53. 15. 0 / 53. 15. 0
    
  libavformat  53. 12. 0 / 53. 12. 0
    
  libavdevice  53.  3. 0 / 53.  3. 0
    
  libavfilter   2. 42. 0 /  2. 42. 0
    
  libswscale    2.  1. 0 /  2.  1. 0
    
  libpostproc  51.  2. 0 / 51.  2. 0
    

    
Seems stream 0 codec frame rate differs from container frame rate: 2000.00 (2000/1) -> 14.99 (15000/1001)
    
Input #0, flv, from 'rio.flv':
    
  Duration: 00:01:00.06, start: 0.000000, bitrate: 783 kb/s
    
    Stream #0.0: Video: h264 (Main), yuv420p, 704x480 [SAR 10:11 DAR 4:3], 14.99 tbr, 1k tbn, 2k tbc

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