Recherche avancée

Médias (1)

Mot : - Tags -/musée

Autres articles (97)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (11454)

  • ffmpeg - Merge two audios with different duration

    5 juin 2015, par Andrés

    Is it possible to merge two audio files with different duration (I don’t know which one is the longest) using ffmpeg’s amerge filter ?

    I don’t want to have a final audio only with the shortest duration, I need that the longest audio be complete too.

    I don’t want to use amix, it’s decreasing the volume of the audios.

  • Revision 18c83b3714 : Compressed/uncompressed frame header changes. Adding API to read/write uncompre

    29 mai 2013, par Dmitry Kovalev

    Changed Paths :
     Modify /vp9/common/vp9_common.h


     Delete /vp9/common/vp9_header.h


     Modify /vp9/common/vp9_modecont.h


     Modify /vp9/common/vp9_onyxc_int.h


     Modify /vp9/decoder/vp9_decodframe.c


     Add /vp9/decoder/vp9_read_bit_buffer.h


     Modify /vp9/encoder/vp9_bitstream.c


     Modify /vp9/encoder/vp9_onyx_if.c


     Add /vp9/encoder/vp9_write_bit_buffer.h


     Modify /vp9/vp9_common.mk


     Modify /vp9/vp9_dx_iface.c


     Modify /vp9/vp9cx.mk


     Modify /vp9/vp9dx.mk



    Compressed/uncompressed frame header changes.

    Adding API to read/write uncompressed frame header bits (it is not final
    yet). Separate functions to read/write uncompressed header. Moving
    clr_type, error_resilient_mode, refresh_frame_context,
    frame_parallel_decoding_mode, frame_context_idx from compressed partition
    to uncompressed frame header.

    Change-Id : Id3ed8a387980c652ae147549412f4ec24a0a5bd0

  • Encoding H.264 video using FFmpeg C API

    18 juillet 2014, par GummiB

    I’m trying to encode a H.264 video with the FFMPEG C API.
    I have successfully compiled and executed the decoding/encoding example provided by FFMPEG.

    The problem I’m facing is that the .mpg file (encoded with AV_CODEC_ID_MPEG1VIDEO) the example creates works. Windows creates a thumbnail and everything. On the other hand the .h264 (encoded with AV_CODEC_ID_H264) file does not. When I try to play the file in VLC the play/pause button just flickers, no thumbnail in windows, no nothing.

    During encoding libx264 reports the following :

    [libx264 @ 004b81a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
    
[libx264 @ 004b81a0] profile High, level 1.3
    
[libx264 @ 004b81a0] frame I:3     Avg QP:26.79  size:  2116
    
[libx264 @ 004b81a0] frame P:12    Avg QP:26.60  size:   789
    
[libx264 @ 004b81a0] frame B:10    Avg QP:31.39  size:   499
    
[libx264 @ 004b81a0] consecutive B-frames: 20.0% 80.0%
    
[libx264 @ 004b81a0] mb I  I16..4: 78.3% 11.6% 10.1%
    
[libx264 @ 004b81a0] mb P  I16..4: 77.4%  0.6%  0.1%  P16..4: 20.3%  0.7%  0.9%  0.0%  0.0%    skip: 0.0%
    
[libx264 @ 004b81a0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  9.4%  0.2%  0.0%  direct:11.0%  skip:79.4%  L0:25.4% L1:35.4% BI:39.2%
    
[libx264 @ 004b81a0] final ratefactor: 17.03
    
[libx264 @ 004b81a0] 8x8 transform intra:3.4% inter:31.3%
    
[libx264 @ 004b81a0] direct mvs  spatial:0.0% temporal:100.0%
    
[libx264 @ 004b81a0] coded y,uvDC,uvAC intra: 4.4% 35.8% 1.6% inter: 1.3% 34.5% 9.5%
    
[libx264 @ 004b81a0] i16 v,h,dc,p:  0%  0%  0% 100%
    
[libx264 @ 004b81a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 20% 17% 49%  0%  0%  0%  1%  6%
    
[libx264 @ 004b81a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14%  7% 18% 45%  2%  7%  2%  3%  2%
    
[libx264 @ 004b81a0] i8c dc,h,v,p:  2%  6%  4% 88%
    
[libx264 @ 004b81a0] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 004b81a0] ref P L0: 95.6%  1.6%  2.2%  0.5%  0.2%
    
[libx264 @ 004b81a0] ref B L0: 67.5% 28.5%  3.2%  0.8%
    
[libx264 @ 004b81a0] kb/s:166.45

    "ffprobe.exe test.h264 -show_streams" returns

    [STREAM]
    
index=0
    
codec_name=h264
    
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    
profile=High
    
codec_type=video
    
codec_time_base=1/50
    
codec_tag_string=[0][0][0][0]
    
codec_tag=0x0000
    
width=352
    
height=288
    
has_b_frames=1
    
sample_aspect_ratio=0:1
    
display_aspect_ratio=0:1
    
pix_fmt=yuv420p
    
level=13
    
timecode=N/A
    
id=N/A
    
r_frame_rate=50/2
    
avg_frame_rate=25/1
    
time_base=1/1200000
    
start_pts=N/A
    
start_time=N/A
    
duration_ts=N/A
    
duration=N/A
    
bit_rate=N/A
    
nb_frames=N/A
    
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
    
[/STREAM]

    There you can see :

    start_time=N/A
    
duration_ts=N/A
    
duration=N/A

    I have tried countless changes to the AVCodecContext and multitude of parameters options to av_opt_set function. Still no luck getting a working H.264 video. I have even tried different builds of FFmpeg. No luck.

    I’m using the "FFmpeg git-0fb64da 32-bit Dev" build from Zeranoe and MinGw 4.7.2

Navigation