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Autres articles (37)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • 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 (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

Sur d’autres sites (5244)

  • Pyinstaller does not include ffmpeg.exe and ffprobe.exe

    11 mars 2021, par lorenzotarquini

    I'm making a simple mp3 downloader using youtube-dl. During my tests with python, everything works, I only had a problem when I saw an error that said 'ffprobe/avprobe and ffmpeg/avconv not found, please install one', solved including ffmpeg.exe and ffprobe.exe in Scripts folder but then i wrote the exe file with pyinstaller, and i got the same error i found before, IDK how to solve it, can someone help me ?. this is the spec file generated :

    


    # -*- mode: python ; coding: utf-8 -*-

block_cipher = None


a = Analysis(['..\\..\\thedownloader_V1.py'],
             pathex=['D:\\Archivio\\Projects\\Python\\MP3_downloader\\venv\\Scripts'],
             binaries=[],
             datas=[],
             hiddenimports=[],
             hookspath=[],
             runtime_hooks=[],
             excludes=[],
             win_no_prefer_redirects=False,
             win_private_assemblies=False,
             cipher=block_cipher,
             noarchive=False)
pyz = PYZ(a.pure, a.zipped_data,
             cipher=block_cipher)
exe = EXE(pyz,
          a.scripts,
          a.binaries,
          a.zipfiles,
          a.datas,
          [],
          name='thedownloader_V1',
          debug=False,
          bootloader_ignore_signals=False,
          strip=False,
          upx=True,
          upx_exclude=[],
          runtime_tmpdir=None,
          console=True )


    


  • lavu/tx : support in-place FFT transforms

    10 février 2021, par Lynne
    lavu/tx : support in-place FFT transforms

    This commit adds support for in-place FFT transforms. Since our
    
internal transforms were all in-place anyway, this only changes
    
the permutation on the input.
    

    Unfortunately, research papers were of no help here. All focused
    
on dry hardware implementations, where permutes are free, or on
    
software implementations where binary bloat is of no concern so
    
storing dozen times the transforms for each permutation and version
    
is not considered bad practice.
    
Still, for a pure C implementation, it's only around 28% slower
    
than the multi-megabyte FFTW3 in unaligned mode.
    

    Unlike a closed permutation like with PFA, split-radix FFT bit-reversals
    
contain multiple NOPs, multiple simple swaps, and a few chained swaps,
    
so regular single-loop single-state permute loops were not possible.
    
Instead, we filter out parts of the input indices which are redundant.
    
This allows for a single branch, and with some clever AVX512 asm,
    
could possibly be SIMD'd without refactoring.
    

    The inplace_idx array is guaranteed to never be larger than the
    
revtab array, and in practice only requires around log2(len) entries.
    

    The power-of-two MDCTs can be done in-place as well. And it's
    
possible to eliminate a copy in the compound MDCTs too, however
    
it'll be slower than doing them out of place, and we'd need to dirty
    
the input array.
    • [DH] doc/APIchanges
    • [DH] libavutil/tx.c
    • [DH] libavutil/tx.h
    • [DH] libavutil/tx_priv.h
    • [DH] libavutil/tx_template.c
    • [DH] libavutil/version.h

  • Stream rtsp to Html5 video tag

    19 mai 2021, par Jim Lin

    I have a camera with a RTSP stream
(Example : rtsp ://admin:password@ip:554/Streaming/Channels/101),
now I want to stream it using HTML5 without any plugin.

    


    I tried some solutions using http-flv protocol :

    


    1.Nginx-http-flv-module + FFmpeg + flv.js

    


    2.Nodejs + FFmpeg + flv.js

    


    ffmpeg command : rtsp ://admin:password@ip:554/Streaming/Channels/101-vcodec copy -an -f flv -s 800x600 rtmp ://localhost:1935/myapp/test

    


    ffmpeg log

    


    The problem is that latency is high bettween 5s-8s, if there is any solution to reduce latency between 1s-2s.

    


    PS:flv.js is an HTML5 Flash Video (FLV) Player written in pure JavaScript without Flash. flv.js

    


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