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  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • Contribute to translation

    13 avril 2011

    You can help us to improve the language used in the software interface to make MediaSPIP more accessible and user-friendly. You can also translate the interface into any language that allows it to spread to new linguistic communities.
    To do this, we use the translation interface of SPIP where the all the language modules of MediaSPIP are available. Just subscribe to the mailing list and request further informantion on translation.
    MediaSPIP is currently available in French and English (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

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  • Cannot duplicate virtual camera on Orange Pi 5B [closed]

    21 janvier 2024, par Denis Kotov

    I have faced with the issue that I cannot duplicate virtual camera for SkyDroid 5.8GHz OTG Receiver on Orange Pi 5B :

    


    orangepi@orangepi-desktop:~$ gst-launch-1.0 v4l2src device=/dev/video0 ! xvimagesink device=/dev/video2

Setting pipeline to PAUSED ...
ERROR: from element /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0: Could not initialise Xv output
Additional debug info:
../sys/xvimage/xvimagesink.c(1806): gst_xv_image_sink_open (): /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0:
Could not open display (null)
ERROR: pipeline doesn't want to preroll.
Failed to set pipeline to PAUSED.
Setting pipeline to NULL ...
Freeing pipeline ...

orangepi@orangepi-desktop:~$ gst-launch-1.0 v4l2src device=/dev/video0 ! v4l2sink device=/dev/video2

Setting pipeline to PAUSED ...
ERROR: from element /GstPipeline:pipeline0/GstV4l2Sink:v4l2sink0: Cannot identify device '/dev/video2'.
Additional debug info:
../sys/v4l2/v4l2_calls.c(608): gst_v4l2_open (): /GstPipeline:pipeline0/GstV4l2Sink:v4l2sink0:
system error: No such file or directory
ERROR: pipeline doesn't want to preroll.
Failed to set pipeline to PAUSED.
Setting pipeline to NULL ...
Freeing pipeline ...


    


    Also I tried to duplicate video camera using ffmpeg :

    


    orangepi@orangepi-desktop:~$ sudo ffmpeg -f video4linux2 -i /dev/video0 -codec copy -f v4l2 /dev/video2

ffmpeg version 6.0-5+git230804.e243e8d001~j1 Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
  configuration: --prefix=/usr --extra-version='5+git230804.e243e8d001~j1' --toolchain=hardened --libdir=/usr/lib/aarch64-linux-gnu --incdir=/usr/include/aarch64-linux-gnu --arch=arm64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-version3 --enable-rkmpp --enable-sdl2 --disable-sndio --enable-pocketsphinx --enable-librsvg --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-shared
  libavutil      58.  2.100 / 58.  2.100
  libavcodec     60.  3.100 / 60.  3.100
  libavformat    60.  3.100 / 60.  3.100
  libavdevice    60.  1.100 / 60.  1.100
  libavfilter     9.  3.100 /  9.  3.100
  libswscale      7.  1.100 /  7.  1.100
  libswresample   4. 10.100 /  4. 10.100
  libpostproc    57.  1.100 / 57.  1.100
[mjpeg @ 0xaaab04104190] EOI missing, emulating
Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 3317.330868, bitrate: N/A
  Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 640x480, 30 fps, 30 tbr, 1000k tbn
[video4linux2,v4l2 @ 0xaaab04105750] Unable to open V4L2 device '/dev/video2'
[out#0/video4linux2,v4l2 @ 0xaaab040b9200] Could not write header (incorrect codec parameters ?): No such file or directory
[vost#0:0/copy @ 0xaaab04107640] Error initializing output stream: 
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
    Last message repeated 1 times
[video4linux2,v4l2 @ 0xaaab041039d0] Some buffers are still owned by the caller on close.
ioctl(VIDIOC_QBUF): Bad file descriptor


    


    But it also did not work ...

    


    The reason I want it, because I try to have additional processing using OpenCV but the camera is opened by another application, and it is not possible to similtuniuously open camera in 2 applications at the same time ...

    


    Have somebody faced with similar issue ?

    


  • Back porting ffmpeg.dll from electron for windows xp by disassembling

    28 juillet 2024, par Oosuke Ren

    I've recently gotten into a really interesting project of having a fully functional (and as futuristic as possible) physical retro gaming machine with windows xp. I had found One Core Api that successfully works to allow for some programs to work that otherwise wouldn't have. One of them is electron (5.0.13). Thanks to a vast testing between a VM with the kernel extender and a vanilla XP, I found out that the only thing stopping me from succeeding is because it's dependent on an EXTREMELY specific version/fork of ffmpeg (Chromium fork of ffmpeg 4.1) . Due to that being a relatively old fork/version, the build tools/links for some of the stuff are nonexistent right now, so even if I do have the fork locally with all the instructions, I can't build it. (and if I do I have to patch Win Vista+ Api functions, with one custom stub dll I have)

    


    AcquireSRWLockExclusive InitializeConditionVariable SleepConditionVariableSRW InitOnceBeginInitialize InitOnceComplete InitializeSRWLock ReleaseSRWLockExclusive WakeAllConditionVariable WakeConditionVariable

    


    Since I can't custom build ffmpeg I have to patch it's calls by redirecting them to my custom dll that includes these back ported functions and more.

    


    I tried many different ways => IDA Pro, Ghidra, objconv, currently am the closest with "DLL to C"

    


    Ida Pro and Ghidra seem to not be creating assembly code that I'd be able to assemble back after patching.

    


    objconv produces a really accurate disassembly, but the issue is it doesn't have an assembler. And the produced .asm won't assemble with Fasm, masm or nasm

    


    As for DLL to C-> successfully created a quite presentable VS project, the project successfully compiles with only one warning, the byte sizes is quite similar, the problem is => the functions are getting wrongly directed (towards wrong functions in my dll- and thus the ones needed are undefined) And this is too deep to be able to tell if it's a VS version issue, wrong code implementation or if just DLL to C has wrongly disassembled the logic.

    


    Question is, is my last option remaining to manually edit the HEXES of the Import Address Table and Import Names so they get redirected ? (the problem is my knowledge in Assembly isn't too good, so I'm not sure if that's all I'd have to do, and even if so, I have a feeling I'd mess up the Virtual Addresses or something.

    


  • Split video stream with FFmpeg and play part with FFplay [closed]

    22 mars 2024, par Jan Hein

    I have a video stream send with FFmpeg to a other computer on my local network.
At the receiver computer I want to split the video stream in multiple parts and play them at the receiver computer. How can I do that ?

    


    Example :
Stream send form sender to receiver is 1000x1000 pixels.
At the receiver split the 1000x1000 pixel stream into four parts of 500x500 pixels, and play them all four on the receiver in a separate player.

    


    I have tryed it with a multicast stream to the receiver, and played it four times with FFplay, but that was not working correct.

    


    I also hve looked for multiple outputs with FFmpeg and then multiple pipes to FFplay, but could not find a solution.

    


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