Recherche avancée

Médias (1)

Mot : - Tags -/copyleft

Autres articles (68)

  • 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" (...)

  • 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 (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

Sur d’autres sites (10598)

  • ffmpeg extract subtitles with unknown codec [migrated]

    21 juillet 2014, par user2987221

    I’m writing a program which extracts images and GPS coordinates from files that were created by car video recorder.
    In many models it creates two separate files Video and GPS but not all, some recorders write information about GPS – coordinates into video file subtitles. So I Faced with the problem of extracting subtitles from video file.
    Using such command

    d:\test\ffmpeg -i "d:\test\example_1.MOV" -an -vn -c:s copy -f rawvideo  d:\test\sub.txt

    I got subtitles from file "example_1.MOV", but with another file "example_2.MOV" I got a message "Output file #0 does not contain any stream"

    I know exactly that this file has a subtitles so I tried to figure out what streams does this file contain using command

    d:\Test\ffprobe -show_streams -i "d:\test\example_2.MOV"

    i got such information

    d:\test\ffprobe -show_streams -i "d:\test\example_2.
    
MOV"
    
ffprobe version N-64836-gce385c8 Copyright (c) 2007-2014 the FFmpeg developers
    
  built on Jul 20 2014 23:42:59 with gcc 4.8.3 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
    
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib
    
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
    
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge
    
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --en
    
able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
    
 --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
    
libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
    
  libavutil      52. 92.101 / 52. 92.101
    
  libavcodec     55. 69.100 / 55. 69.100
    
  libavformat    55. 48.101 / 55. 48.101
    
  libavdevice    55. 13.102 / 55. 13.102
    
  libavfilter     4. 11.102 /  4. 11.102
    
  libswscale      2.  6.100 /  2.  6.100
    
  libswresample   0. 19.100 /  0. 19.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'd:\test\example_2.MOV':
    
  Metadata:
    
    major_brand     : qt
    
    minor_version   : 0
    
    compatible_brands: qt
    
    creation_time   : 2014-03-30 16:05:10
    
    comment         : RELLA A7L
    
    comment-pra     : RELLA A7L
    
  Duration: 00:02:34.72, start: 0.033367, bitrate: 9039 kb/s
    
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc), 1280
    
x720 [SAR 1:1 DAR 16:9], 9014 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (de
    
fault)
    
    Metadata:
    
      creation_time   : 2014-03-30 16:05:10
    
      handler_name    : Ambarella AVC
    
      encoder         : Ambarella AVC encoder
    
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 12
    
8 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-03-30 16:05:10
    
      handler_name    : Ambarella AAC
    
    Stream #0:2(eng): Data: none (RVMI / 0x494D5652), 0 kb/s
    
    Metadata:
    
      handler_name    :  GPS and G-Sensor
    
Unsupported codec with id 0 for input stream 2
    
[STREAM]
    
index=0
    
codec_name=h264
    
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    
profile=Main
    
codec_type=video
    
codec_time_base=1001/60000
    
codec_tag_string=avc1
    
codec_tag=0x31637661
    
width=1280
    
height=720
    
has_b_frames=0
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=16:9
    
pix_fmt=yuvj420p
    
level=31
    
color_range=pc
    
color_space=unknown
    
timecode=N/A
    
id=N/A
    
r_frame_rate=30000/1001
    
avg_frame_rate=30000/1001
    
time_base=1/30000
    
start_pts=-1001
    
start_time=-0.033367
    
duration_ts=4638634
    
duration=154.621133
    
bit_rate=9014524
    
max_bit_rate=N/A
    
nb_frames=4634
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
TAG:creation_time=2014-03-30 16:05:10
    
TAG:language=eng
    
TAG:handler_name=Ambarella AVC
    
TAG:encoder=Ambarella AVC encoder
    
[/STREAM]
    
[STREAM]
    
index=1
    
codec_name=aac
    
codec_long_name=AAC (Advanced Audio Coding)
    
profile=unknown
    
codec_type=audio
    
codec_time_base=1/48000
    
codec_tag_string=mp4a
    
codec_tag=0x6134706d
    
sample_fmt=fltp
    
sample_rate=48000
    
channels=2
    
channel_layout=stereo
    
bits_per_sample=0
    
id=N/A
    
r_frame_rate=0/0
    
avg_frame_rate=0/0
    
time_base=1/48000
    
start_pts=0
    
start_time=0.000000
    
duration_ts=7421952
    
duration=154.624000
    
bit_rate=128000
    
max_bit_rate=N/A
    
nb_frames=7248
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
TAG:creation_time=2014-03-30 16:05:10
    
TAG:language=eng
    
TAG:handler_name=Ambarella AAC
    
[/STREAM]
    
[STREAM]
    
index=2
    
codec_name=unknown
    
codec_long_name=unknown
    
profile=unknown
    
codec_type=data
    
codec_time_base=0/1
    
codec_tag_string=RVMI
    
codec_tag=0x494d5652
    
id=N/A
    
r_frame_rate=0/0
    
avg_frame_rate=0/0
    
time_base=1/50
    
start_pts=0
    
start_time=0.000000
    
duration_ts=7736
    
duration=154.720000
    
bit_rate=255
    
max_bit_rate=N/A
    
nb_frames=309
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=0
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
TAG:language=eng
    
TAG:handler_name= GPS and G-Sensor
    
[/STREAM]

    So ffmpeg does’t want to extract subtitles from this file.
    I’d be glad for any suggestions how to extract subtitles from video

  • avcodec : add avdct

    26 juillet 2014, par Michael Niedermayer
    avcodec : add avdct

    This provides a public sustainable API/ABI for DCT functions.
    
Only externally used dct functions are included.
    
The structure is extensible without ABI issues compared to the
    
existing dct contexts.
    

    See Mailing list and IRC log of 2014-07-26/27
    

    Reviewed-by : ubitux
    
Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] doc/APIchanges
    • [DH] libavcodec/Makefile
    • [DH] libavcodec/avdct.c
    • [DH] libavcodec/avdct.h
    • [DH] libavcodec/version.h

  • libFLAC/cpu.c : Simplify OS SSE support detection.

    28 juillet 2014, par Erik de Castro Lopo
    libFLAC/cpu.c : Simplify OS SSE support detection.

    Simplify the code that tries to detect whether OS supports SSE instructions.
    

    a) Linux : "old" vs "new" sigaction
    

    OBSOLETE_SIGCONTEXT_FLAVOR was disabled in Mar 2007 in commit 1ca3a445f.
    
According to <http://unixhelp.ed.ac.uk/CGI/man-cgi?sigaction>: "Support for
    
SA_SIGINFO was added in Linux 2.2" (released in Jan 1999). If noone wants to
    
use FLAC with Linux kernel 2.0 then it’s safe to delete this code.
    

    b) MSVC : try/catch vs. sigill_handler
    

    TRY_CATCH_FLAVOR was enabled in Jan 2009 in commit a832ef32. According to the
    
comment in cpu.c, "sigill_handler flavor resulted in several crash reports on
    
win32". Also this sigill_handler flavor is not thread-safe.
    

    c) MinGW : fxsave/fxrestore vs. sigill_handler
    

    The code was added Mar 2014 in commit 99d5154f. It’s better to use FXSR flavor
    
instead of sigill_handler flavor. The reasons are the same as for MSVC.
    

    Patch-from : lvqcl <lvqcl.mail@gmail.com>
    • [DH] src/libFLAC/cpu.c

Navigation