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Autres articles (34)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

Sur d’autres sites (6018)

  • building static ffmpeg library for Android under windows 7

    29 mai 2013, par Zhenya

    I know that this has been asked several times, but I've never found any clear step by step and conclusive answer.

    How can I compile ffmpeg for Android, under windows 7 ?
    What are the steps ? Is there a project or wiki on the internet where to find this ?

    All I've found are steps to run under Ubuntu, or purely linux, but nothing to generate a static library for android, to be build under windows 7.

    Thanks

  • How to use existing .so file in my other android project in windows PC ?

    28 mai 2013, par Mihir Shah

    I have to use ffmpeg library for video editing application in android. I have no experience in JNI or NDK. but I have ffmpeg.so file. Can I directly use it in my new android application ?

    I am using it but generating error : Caused by: java.lang.UnsatisfiedLinkError: Couldn't load videokit: findLibrary returned null

    If not, what are the steps to generate .so file ? I have search lot of things but all are in mostly ubuntu. How to generate in windows or mac os ? Can i decompile my existing .so file ?

  • Streaming video from an image using FFMPEG on Windows

    26 mai 2013, par Daniel Zohar

    I wrote a program that simulates a camera and converts the output into a video stream. The program is required to be able to run on Windows.
    There are two components in the system :

    1. Camera Simulator. A C++ program that simulates the camera. It copies a pre-generated frame (i.e. PNG file) every 0.1 seconds, using the windows copy command, to a destination path ./target/target_image.png
    2. Video Stream. Using FFmpeg, it creates a video stream out of the copied images. FFmpeg is ran with the following command :
      ffmpeg -loop 1 -i ./target/target_image.png -r 10 -vcodec mpeg4 -f mpegts udp://127.0.0.1:1234

    When running the whole thing together, it works fine for a few seconds until the ffmpeg halts. Here is a log while running in debug mode :

    ffmpeg version N-52458-gaa96439 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Apr 24 2013 22:19:32 with gcc 4.8.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
    
  libavutil      52. 27.101 / 52. 27.101
    
  libavcodec     55.  6.100 / 55.  6.100
    
  libavformat    55.  3.100 / 55.  3.100
    
  libavdevice    55.  0.100 / 55.  0.100
    
  libavfilter     3. 60.101 /  3. 60.101
    
  libswscale      2.  2.100 /  2.  2.100
    
  libswresample   0. 17.102 /  0. 17.102
    
  libpostproc    52.  3.100 / 52.  3.100
    
Splitting the commandline.
    
Reading option '-loop' ... matched as AVOption 'loop' with argument '1'.
    
Reading option '-i' ... matched as input file with argument './target/target_image.png'.
    
Reading option '-r' ... matched as option 'r' (set frame rate (Hz value, fraction or abbreviation)) with argument '10'.
    
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'mpeg4'.
    
Reading option '-f' ... matched as option 'f' (force format) with argument 'mpegts'.
    
Reading option 'udp://127.0.0.1:1234' ... matched as output file.
    
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
    
Finished splitting the commandline.
    
Parsing a group of options: global .
    
Applying option loglevel (set logging level) with argument debug.
    
Successfully parsed a group of options.
    
Parsing a group of options: input file ./target/target_image.png.
    
Successfully parsed a group of options.
    
Opening an input file: ./target/target_image.png.
    
[AVIOContext @ 02678840] Statistics: 234307 bytes read, 0 seeks
    
[AVIOContext @ 02678840] Statistics: 221345 bytes read, 0 seeks
    
    Last message repeated 1 times
    
[AVIOContext @ 02678840] Statistics: 226329 bytes read, 0 seeks
    
    Last message repeated 2 times
    
[AVIOContext @ 02678840] Statistics: 228676 bytes read, 0 seeks
    
    Last message repeated 2 times
    
[AVIOContext @ 02678840] Statistics: 230685 bytes read, 0 seeks
    
    Last message repeated 2 times
    
[AVIOContext @ 02678840] Statistics: 232697 bytes read, 0 seeks
    
    Last message repeated 5 times
    
[AVIOContext @ 02678840] Statistics: 234900 bytes read, 0 seeks
    
    Last message repeated 2 times
    
[AVIOContext @ 02678840] Statistics: 236847 bytes read, 0 seeks
    
[image2 @ 02677ac0] Probe buffer size limit of 5000000 bytes reached
    
Input #0, image2, from './target/target_image.png':
    
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
    
    Stream #0:0, 22, 1/25: Video: png, rgb24, 1274x772 [SAR 1:1 DAR 637:386], 1/25, 25 fps, 25 tbr, 25 tbn, 25 tbc
    
Successfully opened the file.
    
Parsing a group of options: output file udp://127.0.0.1:1234.
    
Applying option r (set frame rate (Hz value, fraction or abbreviation)) with argument 10.
    
Applying option vcodec (force video codec ('copy' to copy stream)) with argument mpeg4.
    
Applying option f (force format) with argument mpegts.
    
Successfully parsed a group of options.
    
Opening an output file: udp://127.0.0.1:1234.
    
Successfully opened the file.
    
[graph 0 input from stream 0:0 @ 02769280] Setting 'video_size' to value '1274x772'
    
[graph 0 input from stream 0:0 @ 02769280] Setting 'pix_fmt' to value '2'
    
[graph 0 input from stream 0:0 @ 02769280] Setting 'time_base' to value '1/25'
    
[graph 0 input from stream 0:0 @ 02769280] Setting 'pixel_aspect' to value '1/1'
    
[graph 0 input from stream 0:0 @ 02769280] Setting 'sws_param' to value 'flags=2'
    
[graph 0 input from stream 0:0 @ 02769280] Setting 'frame_rate' to value '25/1'
    
[graph 0 input from stream 0:0 @ 02769280] w:1274 h:772 pixfmt:rgb24 tb:1/25 fr:25/1 sar:1/1 sws_param:flags=2
    
[format @ 02768ba0] compat: called with args=[yuv420p]
    
[format @ 02768ba0] Setting 'pix_fmts' to value 'yuv420p'
    
[auto-inserted scaler 0 @ 02768740] Setting 'w' to value '0'
    
[auto-inserted scaler 0 @ 02768740] Setting 'h' to value '0'
    
[auto-inserted scaler 0 @ 02768740] Setting 'flags' to value '0x4'
    
[auto-inserted scaler 0 @ 02768740] w:0 h:0 flags:'0x4' interl:0
    
[format @ 02768ba0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
    
[AVFilterGraph @ 026772c0] query_formats: 4 queried, 3 merged, 1 already done, 0 delayed
    
[auto-inserted scaler 0 @ 02768740] w:1274 h:772 fmt:rgb24 sar:1/1 -> w:1274 h:772 fmt:yuv420p sar:1/1 flags:0x4
    
[mpeg4 @ 02785020] detected 4 logical cores
    
[mpeg4 @ 02785020] intra_quant_bias = 0 inter_quant_bias = -64
    
[mpegts @ 0277da40] muxrate VBR, pcr every 1 pkts, sdt every 200, pat/pmt every 40 pkts
    
Output #0, mpegts, to 'udp://127.0.0.1:1234':
    
  Metadata:
    
    encoder         : Lavf55.3.100
    
    Stream #0:0, 0, 1/90000: Video: mpeg4, yuv420p, 1274x772 [SAR 1:1 DAR 637:386], 1/10, q=2-31, 200 kb/s, 90k tbn, 10 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (png -> mpeg4)
    
Press [q] to stop, [?] for help
    
*** drop!
    
    Last message repeated 10 times
    
frame=   11 fps=0.0 q=4.0 size=     118kB time=00:00:01.10 bitrate= 875.1kbits/s dup=0 drop=11    
    
Statistics: 242771 bytes read, 0 seeks
    
[AVIOContext @ 02674a60] Statistics: 246525 bytes read, 0 seeks
    
*** drop!
    
[AVIOContext @ 02674a60] Statistics: 230678 bytes read, 0 seeks
    
[AVIOContext @ 02674a60] Statistics: 244023 bytes read, 0 seeks
    
*** drop!
    
[AVIOContext @ 02674a60] Statistics: 246389 bytes read, 0 seeks
    

    
*** drop!
    
[AVIOContext @ 02674a60] Statistics: 224478 bytes read, 0 seeks
    
[AVIOContext @ 02674a60] Statistics: 228013 bytes read, 0 seeks
    
*** drop!
    
[image2 @ 02677ac0] Could not open file : ./target/target_image.png
    
./target/target_image.png: Input/output error
    
[output stream 0:0 @ 02768c20] EOF on sink link output stream 0:0:default.
    
No more output streams to write to, finishing.
    
frame=  164 fps= 17 q=31.0 Lsize=     959kB time=00:00:16.40 bitrate= 478.9kbits/s dup=0 drop=240    
    

    
video:869kB audio:0kB subtitle:0 global headers:0kB muxing overhead 10.285235%
    
404 frames successfully decoded, 0 decoding errors
    
[AVIOContext @ 026779c0] Statistics: 0 seeks, 746 writeouts

    It seems to me there's some kind of collision between the reading and writing to/from the same file. What's also interesting is that on Linux (while replacing the copy with cp) the program works just fine.

    Can someone suggest a way to solve this issue ? Alternatives solutions are also acceptable as long as the logical workflow remains the same.

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