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  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • 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" (...)

  • 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.

Sur d’autres sites (9470)

  • ffmpeg filters order rotate scale with overlay

    13 décembre 2017, par Sebastián Márquez Lutfy

    I’m trying to render an image over a video. I use the following command after some research

    ffmpeg -y  -i "my_video.mp4" -i "my_image.jpg" -filter_complex "color=color=blue:size=711x400:rate=25[container];[0:v]scale=w=400:h=400,setpts=expr=PTS-STARTPTS[vidscaled];[container][vidscaled]overlay=eval=init:shortest=1:x=155:y=0[overlay0];[1:v]scale=w=123:h=123,rotate=a=323.7*PI/180:c=black@0:oh='roth(323.7*PI/180)':ow='rotw(323.7*PI/180)':bilinear=1[imgproc];[overlay0][imgproc]overlay=eval=init:x=18:y='237-abs(123*sin(323.7*PI/180))'[overlay1]" -map "[overlay1]" -map 0:a -strict -2 -preset ultrafast -g 120 output.mp4

    The problem with this approach is a low image’s quality since scaling is applied before rotate. So i tried to apply the rotation before scaling, (see next command)

    ffmpeg -y  -i "my_video.mp4" -i "my_image.jpg" -filter_complex "color=color=blue:size=711x400:rate=25[container];[0:v]scale=w=400:h=400,setpts=expr=PTS-STARTPTS[vidscaled];[container][vidscaled]overlay=eval=init:shortest=1:x=155:y=0[overlay0];[1:v]rotate=a=323.7*PI/180:c=black@0:oh='roth(323.7*PI/180)':ow='rotw(323.7*PI/180)':bilinear=1,scale=w=173:h=173[imgproc];[overlay0][imgproc]overlay=eval=init:x=18:y='237-abs(123*sin(323.7*PI/180))'[overlay1]" -map "[overlay1]" -map 0:a -strict -2 -preset ultrafast -g 120 output.mp4

    And the problem : c=black@0 is not working anymore, the bounding box around the rotated image is not transparent.

    Anyone please help this soul.

    pd : Using c=none doesn’t work too, got a green background

  • avformat/mpegtsenc : Fix mpegts_write_pes() for private_stream_2 and other types

    25 avril 2021, par zheng qian
    avformat/mpegtsenc : Fix mpegts_write_pes() for private_stream_2 and other types

    According to the PES packet definition defined in Table 2-17 of ISO_IEC_13818-1
    
specification, some fields like PTS/DTS or pes_extension could only appears if
    
the stream_id meets the condition :
    

    if (stream_id != 0xBC &&  // program_stream_map
    
    stream_id != 0xBE &&  // padding_stream
    
    stream_id != 0xBF &&  // private_stream_2
    
    stream_id != 0xF0 &&  // ECM
    
    stream_id != 0xF1 &&  // EMM
    
    stream_id != 0xFF &&  // program_stream_directory
    
    stream_id != 0xF2 &&  // DSMCC_stream
    
    stream_id != 0xF8)    // ITU-T Rec. H.222.1 type E stream
    

    And the following stream_id types don't have fields like PTS/DTS :
    

    else if ( stream_id == program_stream_map
    
|| stream_id == private_stream_2
    
|| stream_id == ECM
    
|| stream_id == EMM
    
|| stream_id == program_stream_directory
    
|| stream_id == DSMCC_stream
    
|| stream_id == ITU-T Rec. H.222.1 type E stream ) 
    
    for (i = 0 ; i < PES_packet_length ; i++) 
    
        PES_packet_data_byte
    
    
    

    

    Current implementation skipped the check of stream_id causing some kind of
    
streams like private_stream_2 to be incorrectly written with actually a
    
private_stream_1-like PES header with PTS/DTS field. For example, Japan DTV
    
transmits news and alerts through ARIB superimpose that utilizes
    
private_stream_2 still could not be remuxed correctly for now.
    

    This patch set fixes the remuxing for private_stream_2 and
    
other stream_id types.
    

    Signed-off-by : zheng qian <xqq@xqq.im>
    
Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] libavformat/mpegtsenc.c

  • Why won’t this mp4 play in a video-js tag any longer

    18 octobre 2019, par Velocedge

    I’m using ffmpeg to convert files to MP4. I’ve made some modifications to the ffmpeg string but now it seems no matter what I use, the video won’t play in an HTML5 tag (Chrome browser). Normally, I just used "-vcodec libx264 -s 1280x720 -ar 22050". When I try to load it in the video tag, I get the following error on http://family.gotsport.net/lmw/GotSport/videoPlayer.asp?WS=1&URL=/VideoFiles/2/4_70_highlight :

    The media could not be loaded, either because the server or network failed or because the format is not supported.

    No matter what parameters I use (or don’t use), it still won’t play. However, if you just call the url directly, it will play in Chrome (http://family.gotsport.net/videofiles/2/2_70_highlight.mp4). I’m using the 7.0.0 version of video-js from their CDN (although older versions give the same result).

    Video tag looks like :

    <video class="video-js vjs-default-skin" autoplay="autoplay" controls="controls" preload="auto"> 
    
    <source src="/VideoFiles/2/4_70_highlight.mp4" type="video/mp4"></source>
    
</video>

    Here is the MediaInfo output from the file that won’t play :

    General
    
Complete name                            : E:\VideoFiles\2\2_70_highlight.mp4
    
Format                                   : MPEG-4
    
Format profile                           : Base Media
    
Codec ID                                 : isom (isom/iso2/avc1/mp41)
    
File size                                : 5.87 MiB
    
Duration                                 : 27 s 60 ms
    
Overall bit rate                         : 1 820 kb/s
    
Writing application                      : Lavf58.29.100
    

    
Video
    
ID                                       : 1
    
Format                                   : AVC
    
Format/Info                              : Advanced Video Codec
    
Format profile                           : High@L3.1
    
Format settings                          : CABAC / 4 Ref Frames
    
Format settings, CABAC                   : Yes
    
Format settings, Reference frames        : 4 frames
    
Codec ID                                 : avc1
    
Codec ID/Info                            : Advanced Video Coding
    
Duration                                 : 27 s 60 ms
    
Bit rate                                 : 1 685 kb/s
    
Width                                    : 1 280 pixels
    
Height                                   : 720 pixels
    
Display aspect ratio                     : 16:9
    
Frame rate mode                          : Constant
    
Frame rate                               : 29.970 (29970/1000) FPS
    
Color space                              : YUV
    
Chroma subsampling                       : 4:2:0
    
Bit depth                                : 8 bits
    
Scan type                                : Progressive
    
Bits/(Pixel*Frame)                       : 0.061
    
Stream size                              : 5.44 MiB (93%)
    
Writing library                          : x264 core 158 r2984 3759fcb
    
Encoding settings                        : cabac=1 / ref=3 / 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=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
    
Codec configuration box                  : avcC
    

    
Audio
    
ID                                       : 2
    
Format                                   : AAC LC
    
Format/Info                              : Advanced Audio Codec Low Complexity
    
Codec ID                                 : mp4a-40-2
    
Duration                                 : 27 s 22 ms
    
Duration_LastFrame                       : -6 ms
    
Bit rate mode                            : Constant
    
Bit rate                                 : 128 kb/s
    
Channel(s)                               : 2 channels
    
Channel layout                           : L R
    
Sampling rate                            : 22.05 kHz
    
Frame rate                               : 21.533 FPS (1024 SPF)
    
Compression mode                         : Lossy
    
Stream size                              : 423 KiB (7%)
    
Default                                  : Yes
    
Alternate group                          : 1

    Do you see anything that would keep this format from playing in an HTML5 video tag ?

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