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Mot : - Tags -/open film making

Autres articles (49)

  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • 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 (...)

Sur d’autres sites (8880)

  • Revision 8d7f53f04c : Account for rate error in GF group Q calculation. When GF group adaptive maxQ i

    20 février 2015, par paulwilkins

    Changed Paths :
     Modify /vp9/encoder/vp9_firstpass.c


     Modify /vp9/vp9_cx_iface.c



    Account for rate error in GF group Q calculation.

    When GF group adaptive maxQ is enabled this patch accounts
    somewhat for accumulated error in the rate control.

    This improves accuracy quite a bit on many clips especially
    when there is overshoot.

    Examples when the overshoot and undershoot command line
    parameters are set to 100 :

    Hall @ 1200 overshoot is reduced from 67-24%.
    Akiyo @ 400 undershoot is reduced from 28%-15%.

    Setting a lower value for undershoot or overshoot still
    reduces the error further.

    Impact on metrics is mixed with some gains in average psnr
    but generally a little lower (e.g. 0.5%) on overall and ssim.

    The GF group adaptation is still off by default in this patch.
    Compared to with the head, enabling this mode now gives
    big average psnr gains on the YT sets (e.g. YT_HD >11.2%),
    a drop in overall PSNR (YT-HD 3.9%) and a smaller drop or
    neutral for SSIM.

    Change-Id : If4b32cd0740d3fb941317b374f9c2951954eee90

  • Processing files and then re-uploading with fog and carrierwave fails on production

    2 mars 2015, par Laurie

    So I’m trying to get use carrierwave and fog to upload a file to my server, processing that file using ffmpeg to cut it into multiple small files, then upload those to s3.

    This works locally (no fog, just file storage), but breaks on production with this error :

    NoMethodError: undefined method 'to_file' for #CarrierWave::Storage::Fog::File:0x0000000639a458>

    And this trace :

    /var/deploy/webapp/web_head/shared/bundle/ruby/2.2.0/gems/carrierwave-0.10.0/lib/carrierwave/storage/fog.rb 259:in `store'
    
…gems/carrierwave-0.10.0/lib/carrierwave/storage/fog.rb:  80:in `store!'
    
…s/carrierwave-0.10.0/lib/carrierwave/uploader/store.rb:  59:in `block in store!'
    
…rrierwave-0.10.0/lib/carrierwave/uploader/callbacks.rb:  17:in `with_callbacks'
    
…s/carrierwave-0.10.0/lib/carrierwave/uploader/store.rb:  58:in `store!'
    
…2.2.0/gems/carrierwave-0.10.0/lib/carrierwave/mount.rb: 375:in `store!'
    
…2.2.0/gems/carrierwave-0.10.0/lib/carrierwave/mount.rb: 207:in `store_audio!'
    
…/20150227144932/app/controllers/podcasts_controller.rb:  60:in `update'
    
…2.0/gems/actionview-4.2.0/lib/action_view/rendering.rb:  30:in `process'
    
…_language-2.0.5/lib/http_accept_language/middleware.rb:  14:in `call'
    
…red/bundle/ruby/2.2.0/gems/rack-1.6.0/lib/rack/etag.rb:  24:in `call'
    
…/ruby/2.2.0/gems/rack-1.6.0/lib/rack/conditionalget.rb:  38:in `call'
    
…red/bundle/ruby/2.2.0/gems/rack-1.6.0/lib/rack/head.rb:  13:in `call'
    
…/2.2.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb: 225:in `context'
    
…/2.2.0/gems/rack-1.6.0/lib/rack/session/abstract/id.rb: 220:in `call'

    So, I have two uploaders. The uploader for the small chopped up audio files just sets the storage to fog, that’s it.

    After uploading the big audio file I run this processing function in the uploader (though the error doesn’t seem to come from here) :

    def split
    
  directory = File.dirname(current_path)
    
  tmpfile = File.join(directory,'tmpfile.mp3')
    
  File.rename(current_path,tmpfile)
    
  File.chmod(0644,tmpfile)
    

    
  sound = FFMPEG::Movie.new(tmpfile)
    
  @model.length = Mp3Info.open(tmpfile).length.round
    

    

    
  i=0
    
  number_of_lines= @model.ordered_lines.length
    
  lines = @model.ordered_lines
    
  while icode>

    Any ideas ?

  • Mozilla Firefox 36 has problems playing my h264 MP4 files

    11 juin 2015, par Wolfgang Pürstner

    I try to convert videos with ffmpeg to mp4 format (h264) Profile : High Level : 3.1 (1280x720 with 30fps), Bitrate 1500k

    The video plays very well in every browser except in Firefox.

    http://5.79.72.89/trailer/trailer.mp4

    At first it needs longer to load and when I seek inside the video most times the video don’t stop to load and never plays again.
    I can see a lot of partial downloads in the developer console. A lot of them are for the initial play and the rest of the requests are during the video load when I seek to a later position.

    enter image description here

    When I play other h264 Videos (MP4 with similar settings) they play without problems on this server.
    And when I put my video on another webserver (apache) there are the same problems with Firefox.

    For this reason I believe it has to do something with me my conversion.

    My settings :
    Debian 7 (wheezy)
    Webserver : nginx (with 260k bandwidth limit)

    I started converting videos with avconv and switched to ffmpeg because of this problems. But there was no success.
    Meanwhile I tried all options for encoding but there are always the same problems with Firefox. Other videos play well but not mines and I don’t know why.

    Command :

    ffmpeg -i input.mp4 -tune zerolatency -x264opts bitrate=1500:vbv-maxrate=1500:vbv-bufsize=3000:nal-hrd=vbr -codec:v libx264 -profile:v high -level 3.1 -movflags +faststart -pix_fmt yuv420p  -s 1280x720 -r 30 -ac 2 -ar 48000 -codec:a aac -ab 64k -strict experimental -y trailer.mp4

    ffmpeg 1.0.10
libavutil      51. 73.101 / 51. 73.101
libavcodec     54. 59.100 / 54. 59.100
libavformat    54. 29.104 / 54. 29.104
libavdevice    54.  2.101 / 54.  2.101
libavfilter     3. 17.100 /  3. 17.100
libswscale      2.  1.101 /  2.  1.101
libswresample   0. 15.100 /  0. 15.100
libpostproc    52.  0.100 / 52.  0.100

    Mediainfo of the file : trailer.mp4

    General
Complete name : trailer.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 115 MiB
Duration : 10mn 34s
Overall bit rate : 1 516 Kbps
Movie name : Big Buck Bunny, Sunflower version
Performer : Blender Foundation 2008, Janus Bager Kristensen 2013
Composer : Sacha Goedegebure
Genre : Animation
Writing application : Lavf54.29.104
Comment : Creative Commons Attribution 3.0 - http://bbb3d.renderfarming.net

    Video
    
ID : 1
    
Format : AVC
    
Format/Info : Advanced Video Codec
    
Format profile : High@L3.1
    
Format settings, CABAC : Yes
    
Format settings, ReFrames : 4 frames
    
Codec ID : avc1
    
Codec ID/Info : Advanced Video Coding
    
Duration : 10mn 34s
    
Bit rate : 1 500 Kbps
    
Width : 1 920 pixels
    
Height : 1 080 pixels
    
Display aspect ratio : 16:9
    
Frame rate mode : Constant
    
Frame rate : 30.000 fps
    
Color space : YUV
    
Chroma subsampling : 4:2:0
    
Bit depth : 8 bits
    
Scan type : Progressive
    
Bits/(Pixel*Frame) : 0.024
    
Stream size : 109 MiB (95%)
    
Writing library : x264 core 132
    
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=50 / keyint_min=5 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=cbr / mbtree=1 / bitrate=1500 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=1500 / vbv_bufsize=3000 / nal_hrd=none / ip_ratio=1.40 / aq=1:1.00
    

    Audio
    
ID : 2
    
Format : AAC
    
Format/Info : Advanced Audio Codec
    
Format profile : LC
    
Codec ID : 40
    
Duration : 10mn 34s
    
Duration_LastFrame : -11ms
    
Bit rate mode : Constant
    
Bit rate : 64.2 Kbps
    
Channel(s) : 2 channels
    
Channel positions : Front : L R
    
Sampling rate : 48.0 KHz
    
Compression mode : Lossy
    
Delay relative to video : -2ms
    
Stream size : 4.85 MiB (4%)

    I don’t know what is wrong with my files.

    Update 2015-03-12 :

    If I convert the video without audio stream there is no problem with firefox anymore.

    I updated ffmpeg to 2.6. I used libfaac, aac and libfdk_aac for audio encoding with cbr and vbr but without success.

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