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Autres articles (41)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (3112)

  • avformat/sccdec : display last caption even when there is no empty last line

    27 juin 2019, par Paul B Mahol
    avformat/sccdec : display last caption even when there is no empty last line
    • [DH] libavformat/sccdec.c

  • How to Capture/Convert video using VLC or FFmpeg starting at the next encountered I-Frame

    28 juillet 2014, par DavidG

    I am capturing multicast video using VLC.exe and performing some processing/converting using FFmpeg.exe. The resulting video starts with a gray background with some of the moving objects moving through the gray background. This seems to me that the video is not starting on an I-Frame, but on a B-Frame or a P-Frame. However, when I run ffprobe, it states the first frame is a key frame. After about 1/2 second, the video plays fine.

    Here is the command I’m using to capture the video :

    vlc.exe -I curses --run-time=10 "my.sdp" --sout=video.mp4

    I’m not using anything special when I convert to an mp4 file using FFmpeg :

    ffmpeg.exe -i video.mp4 -s 400x300 final.mp4

    I tried to post an image of the first frame or two, but Stackoverflow gave me an error stating I need at least 10 reputation to post images. Sorry about that, an image would have helped.

    I ran the command "ffprobe show_frames " and it looks like the first frame is a key frame. Of course I’m new to all this and I don’t know what I’m doing or seeing.

    Here is beginning of the output to the "ffprobe show_frames " command :

    [FRAME]
    
media_type=video
    
key_frame=1
    
pkt_pts=0
    
pkt_pts_time=0.000000
    
pkt_dts=0
    
pkt_dts_time=0.000000
    
pkt_duration=1001
    
pkt_duration_time=0.033367
    
pkt_pos=48
    
pkt_size=756
    
width=400
    
height=300
    
pix_fmt=yuv420p
    
sample_aspect_ratio=1:1
    
pict_type=I
    
coded_picture_number=0
    
display_picture_number=0
    
interlaced_frame=0
    
top_field_first=0
    
repeat_pict=0
    
reference=3
    
[/FRAME]

    Is there any way to either tell VLC.exe to start capturing on an I-Frame (This would be the best solution as I specify a duration to capture the video) or is there a way to tell FFmpeg.exe to start converting the input video starting at the first I-Frame encountered ?

    Thanks,
    - David

  • Multicast video captured via VLC show a gray background for first 1/2 second

    28 juillet 2014, par DavidG

    I am capturing multicast video using VLC.exe and performing some processing/converting using FFmpeg.exe. The resulting video starts with a gray background with some of the moving objects moving through the gray background. This seems to me that the video is not starting on an I-Frame, but on a B-Frame or a P-Frame. However, when I run ffprobe, it states the first frame is a key frame. After about 1/2 second, the video plays fine.

    Here is the command I’m using to capture the video :

    vlc.exe -I curses --run-time=10 "my.sdp" --sout=video.mp4

    I’m not using anything special when I convert to an mp4 file using FFmpeg :

    ffmpeg.exe -i video.mp4 -s 400x300 final.mp4

    I tried to post an image of the first frame or two, but Stackoverflow gave me an error stating I need at least 10 reputation to post images. Sorry about that, an image would have helped.

    I ran the command "ffprobe show_frames " and it looks like the first frame is a key frame. Of course I’m new to all this and I don’t know what I’m doing or seeing.

    Here is beginning of the output to the "ffprobe show_frames " command :

    [FRAME]
    
media_type=video
    
key_frame=1
    
pkt_pts=0
    
pkt_pts_time=0.000000
    
pkt_dts=0
    
pkt_dts_time=0.000000
    
pkt_duration=1001
    
pkt_duration_time=0.033367
    
pkt_pos=48
    
pkt_size=756
    
width=400
    
height=300
    
pix_fmt=yuv420p
    
sample_aspect_ratio=1:1
    
pict_type=I
    
coded_picture_number=0
    
display_picture_number=0
    
interlaced_frame=0
    
top_field_first=0
    
repeat_pict=0
    
reference=3
    
[/FRAME]

    Is there any way to either tell VLC.exe to start capturing on an I-Frame (This would be the best solution as I specify a duration to capture the video) or is there a way to tell FFmpeg.exe to start converting the input video starting at the first I-Frame encountered ?

    Thanks,
    - David

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