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Autres articles (59)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

  • 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 (...)

Sur d’autres sites (4598)

  • How to say ffmpeg ignore reboot of ip camera

    25 août 2016, par Svishchev Semen

    I record stream from ip camera with batch file :

    ffmpeg -rtsp_transport tcp -stimeout 50000000 -i  rtsp://192.168.50.50:554/user=admin&password=&channel=1&stream=0.sdp?real_stream" -b:v 900k -acodec copy -vcodec copy -r 30 -f segment -strftime 1 -segment_time 00:30:00 -reset_timestamps 1 -segment_format avi D:\Camera\level2\output_%%d-%%m_%%Y_%%H_%%M.avi

    When ffmpeg lost tcp connection ( 10 sec) to camera recording paused, then link goes up ffmpeg continues to write in the current file. But when i reboot camera by power off/on ffmpeg stop the record and crushes.

    How to say ffmpeg wait for signal from camera and not close record.

    Sorry for my English i’m from Russia.

  • How build ffmpeg optimized for iOS, using hardware decoding probably ?

    9 décembre 2013, par jAckOdE

    I make a FFMPEG-based player for ios. It works fine on simulator, but on real-device (iPhone 4) the frame rate is low and make my audio and video out of sync. the player works fine on iPhone 4s, so I guess it's just problem about device's computing power.

    So, is there anyway to build FFMPEG optimized for iOS device (armv7, arvm7s arch) ? or is there anyway to utilize ios device hardware to decode video stream ?

    My video stream is encode in H264/AAC.

  • x86/tx_float : implement inverse MDCT AVX2 assembly

    3 septembre 2022, par Lynne
    x86/tx_float : implement inverse MDCT AVX2 assembly

    This commit implements an iMDCT in pure assembly.
    

    This is capable of processing any mod-8 transforms, rather than just
    
power of two, but since power of two is all we have assembly for
    
currently, that's what's supported.
    
It would really benefit if we could somehow use the C code to decide
    
which function to jump into, but exposing function labels from assebly
    
into C is anything but easy.
    
The post-transform loop could probably be improved.
    

    This was somewhat annoying to write, as we must support arbitrary
    
strides during runtime. There's a fast branch for stride == 4 bytes
    
and a slower one which uses vgatherdps.
    

    Zen 3 benchmarks for stride == 4 for old (av_imdct_half) vs new (av_tx) :
    

    128pt :
    
   2811 decicycles in         av_tx (imdct),16775916 runs,   1300 skips
    
   3082 decicycles in         av_imdct_half,16776751 runs,    465 skips
    

    256pt :
    
   4920 decicycles in         av_tx (imdct),16775820 runs,   1396 skips
    
   5378 decicycles in         av_imdct_half,16776411 runs,    805 skips
    

    512pt :
    
   9668 decicycles in         av_tx (imdct),16775774 runs,   1442 skips
    
  10626 decicycles in         av_imdct_half,16775647 runs,   1569 skips
    

    1024pt :
    
  19812 decicycles in         av_tx (imdct),16777144 runs,     72 skips
    
  23036 decicycles in         av_imdct_half,16777167 runs,     49 skips
    • [DH] libavutil/tx.c
    • [DH] libavutil/tx_priv.h
    • [DH] libavutil/x86/tx_float.asm
    • [DH] libavutil/x86/tx_float_init.c

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