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  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Pas question de marché, de cloud etc...

    10 avril 2011

    Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
    sur le web 2.0 et dans les entreprises qui en vivent.
    Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
    Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
    le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
    Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...)

Sur d’autres sites (10310)

  • ffmepg Video Encoding got a error with "invalid plane data size"

    28 octobre 2020, par Mrguo

    ffmpeg version:4.0.3 ; video size : 611G ; Duration:01:34:03

    


      

    • encoding command is :
    • 


    


    ffmpeg -i 2131.MOV -vcodec libx264 -preset ultrafast -pix_fmt yuv420p -b:v 600k -vf scale=640 :-1 small.mp4

    


      

    • video info :
    • 


    


    ffprobe version 4.0.3 Copyright (c) 2007-2018 the FFmpeg developers
  built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-17)
  configuration: --enable-shared --enable-libx264 --enable-gpl
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xca7ac0] overread end of atom '�mak' by 2 bytes
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xca7ac0] overread end of atom '�swr' by 3 bytes
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '04487162221cb76b0a4465037f4a3d7d.MOV':
  Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2024-04-16T19:59:27.000000Z
    make            : Atomos
    make-eng        : Atomos
    encoder         : ShogunSumo - 9.11Cn 
    encoder-eng     : ShogunSumo - 9.11Cn 
    com.atomos.hdr.gamut: Rec709
    com.atomos.hdr.gamma: Rec709
    com.apple.proapps.image.{TIFF}.Make: Atomos
    com.apple.proapps.image.{TIFF}.Model: ShogunSumo
    com.apple.proapps.image.{TIFF}.Software: 9.11Cn
    timecode        : 00:00:00:00
  Duration: 01:34:03.86, start: 0.000000, bitrate: 929321 kb/s
    Stream #0:0(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 4 channels, s32 (24 bit), 4608 kb/s (default)
    Metadata:
      creation_time   : 2024-04-16T19:59:27.000000Z
    Stream #0:1(eng): Video: prores (apcn / 0x6E637061), yuv422p10le(bt709, progressive), 3840x2160, 924704 kb/s, SAR 1:1 DAR 16:9, 50 fps, 50 tbr, 5k tbn, 5k tbc (default)
    Metadata:
      creation_time   : 2024-04-16T19:59:27.000000Z
      encoder         : Apple ProRes 422
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74) (default)
    Metadata:
      creation_time   : 2024-04-16T19:59:27.000000Z
      timecode        : 00:00:00:00
Unsupported codec with id 0 for input stream 2


    


      

    • log with error :
    • 


    


    frame=166986 fps=9.8 q=24.0 size=  350976kB time=00:55:39.46 bitrate= 861.0kbits/s speed=0.196x    
frame=166991 fps=9.8 q=24.0 size=  350976kB time=00:55:39.56 bitrate= 861.0kbits/s speed=0.196x    
[prores @ 0x94f840] invalid plane data size
    Last message repeated 85 times
[prores @ 0x94f840] ac tex damaged 1024, 1024
[prores @ 0x94f840] invalid plane data size
    Last message repeated 1723 times
frame=166997 fps=9.8 q=24.0 size=  350976kB time=00:55:39.68 bitrate= 860.9kbits/s speed=0.196x    
[prores @ 0x94f840] invalid frame header
Error while decoding stream #0:1: Invalid data found when processing input


    


    how can I solve the problem ?

    


  • How To Play Hardware Accelerated Video on A Mac

    28 mai 2013, par Multimedia Mike — General

    I have a friend who was considering purchasing a Mac Mini recently. At the time of this writing, there are 3 desktop models (and 2 more “server” models).


    Apple Mac Mini

    The cheapest one is a Core i5 2.5 GHz. Then there are 2 Core i7 models : 2.3 GHz and 2.6 GHz. The difference between the latter 2 is US$100. The only appreciable technical difference is the extra 0.3 GHz and the choice came down to those 2.

    He asked me which one would be able to play HD video at full frame rate. I found this query puzzling. But then, I have been “in the biz” for a bit too long. Whether or not a computer or device can play a video well depends on a lot of factors.

    Hardware Support
    First of all, looking at the raw speed of the general-purpose CPU inside of a computer as a gauge of video playback performance is generally misguided in this day and age. In general, we have a video standard (H.264, which I’ll focus on for this post) and many bits of hardware are able to accelerate decoding. So, the question is not whether the CPU can decode the data in real time, but can any other hardware in the device (likely the graphics hardware) handle it ? These machines have Intel HD 4000 graphics and, per my reading of the literature, they are capable of accelerating H.264 video decoding.

    Great, so the hardware supports accelerated decoding. So it’s a done deal, right ? Not quite…

    Operating System Support
    An application can’t do anything pertaining to hardware without permission from the operating system. So the next question is : Does Mac OS X allow an application to access accelerated video decoding hardware if it’s available ? This used to be a contentious matter (notably, Adobe Flash Player was unable to accelerate H.264 playback on Mac in the absence of such an API) but then Apple released an official API detailed in Technical Note TN2267.

    So, does this mean that video is magically accelerated ? Nope, we’re still not there yet…

    Application Support
    It’s great that all of these underlying pieces are in place, but if an individual application chooses to decode the video directly on the CPU, it’s all for naught. An application needs to query the facilities and direct data through the API if it wants to leverage the acceleration. Obviously, at this point it becomes a matter of “which application ?”

    My friend eventually opted to get the pricier of the desktop Mac Mini models and we ran some ad-hoc tests since I was curious how widespread the acceleration support is among Mac multimedia players. Here are some programs I wanted to test, playing 1080p H.264 :

    • Apple QuickTime Player
    • VLC
    • YouTube with Flash Player (any browser)
    • YouTube with Safari/HTML5
    • YouTube with Chrome/HTML5
    • YouTube with Firefox/HTML5
    • Netflix

    I didn’t take exhaustive notes but my impromptu tests revealed QuickTime Player was, far and away, the most performant player, occupying only around 5% of the CPU according to the Mac OS X System Profiler graph (which is likely largely spent on audio decoding).

    VLC consistently required 20-30% CPU, so it’s probably leveraging some acceleration facilities. I think that Flash Player and the various HTML5 elements performed similarly (their multi-process architectures can make such a trivial profiling test difficult).

    The outlier was Netflix running in Firefox via Microsoft’s Silverlight plugin. Of course, the inner workings of Netflix’s technology are opaque to outsiders and we don’t even know if it uses H.264. It may very well use Microsoft’s VC-1 which is not a capability provided by the Mac OS X acceleration API (it doesn’t look like the Intel HD 4000 chip can handle it either). I have never seen any data one way or another about how Netflix encodes video. However, I was able to see that Netflix required an enormous amount of CPU muscle on the Mac platform.

    Conclusion
    The foregoing is a slight simplification of the video playback pipeline. There are some other considerations, most notably how the video is displayed afterwards. To circle back around to the original question : Can the Mac Mini handle full HD video playback ? As my friend found, the meager Mac Mini can do an admirable job at playing full HD video without loading down the CPU.

  • Xcode with ffmpeg support

    5 octobre 2013, par user2741735

    I wanted to know the procedure for compiling the xcode project with ffmpeg with special ./configure options and the gas-processor. I'm using direct input from IP Camera and storing it on my hard drive. However I'm doing this on terminal with ffmpeg. I want to do the same operations using code on xcode. Need help for that.

    I have heard that Apple doesn't support ffmpeg for ios apps on AppStore. Is it true ?