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Médias (2)
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SPIP - plugins - embed code - Exemple
2 septembre 2013, par
Mis à jour : Septembre 2013
Langue : français
Type : Image
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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (22)
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Submit enhancements and plugins
13 avril 2011If you have developed a new extension to add one or more useful features to MediaSPIP, let us know and its integration into the core MedisSPIP functionality will be considered.
You can use the development discussion list to request for help with creating a plugin. As MediaSPIP is based on SPIP - or you can use the SPIP discussion list SPIP-Zone. -
D’autres logiciels intéressants
12 avril 2011, parOn ne revendique pas d’être les seuls à faire ce que l’on fait ... et on ne revendique surtout pas d’être les meilleurs non plus ... Ce que l’on fait, on essaie juste de le faire bien, et de mieux en mieux...
La liste suivante correspond à des logiciels qui tendent peu ou prou à faire comme MediaSPIP ou que MediaSPIP tente peu ou prou à faire pareil, peu importe ...
On ne les connais pas, on ne les a pas essayé, mais vous pouvez peut être y jeter un coup d’oeil.
Videopress
Site Internet : (...) -
MediaSPIP Init et Diogène : types de publications de MediaSPIP
11 novembre 2010, parÀ l’installation d’un site MediaSPIP, le plugin MediaSPIP Init réalise certaines opérations dont la principale consiste à créer quatre rubriques principales dans le site et de créer cinq templates de formulaire pour Diogène.
Ces quatre rubriques principales (aussi appelées secteurs) sont : Medias ; Sites ; Editos ; Actualités ;
Pour chacune de ces rubriques est créé un template de formulaire spécifique éponyme. Pour la rubrique "Medias" un second template "catégorie" est créé permettant d’ajouter (...)
Sur d’autres sites (4581)
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Video streaming- control frame rate x264
3 mars 2017, par H.AI’m new to video coding, I found this https://github.com/RafaelPalomar/H264LiveStreamer application code very useful to my project. I want to live stream a webcam over RTP . However, I’m having problem selecting the Frame Per Seconds (FPS). below is the function that controls the encoding param.
void x264Encoder::initilize()
{
x264_param_default_preset(&parameters, "veryfast", "zerolatency");
parameters.i_log_level = X264_LOG_DEBUG;
parameters.i_threads = 1;
parameters.i_width = 640;
parameters.i_height = 480;
parameters.i_fps_num = 25;
parameters.i_fps_den = 1;
parameters.i_keyint_max = 25;
parameters.b_intra_refresh = 1;
parameters.rc.i_rc_method = X264_RC_CRF;
parameters.rc.i_vbv_buffer_size = 1000000;
parameters.rc.i_vbv_max_bitrate = 90000;
parameters.rc.f_rf_constant = 25;
parameters.rc.f_rf_constant_max = 35;
parameters.i_sps_id = 7;
// the following two value you should keep 1
parameters.b_repeat_headers = 1; // to get header before every I-Frame
parameters.b_annexb = 1; // put start code in front of nal. we will remove start code later
x264_param_apply_profile(&parameters, "baseline");
encoder = x264_encoder_open(&parameters);
x264_picture_alloc(&picture_in, X264_CSP_I420, parameters.i_width, parameters.i_height);
picture_in.i_type = X264_TYPE_AUTO;
picture_in.img.i_csp = X264_CSP_I420;
// i have initilized my color space converter for BGR24 to YUV420 because my opencv video capture gives BGR24 image. You can initilize according to your input pixelFormat
convertContext = sws_getContext(parameters.i_width,parameters.i_height, PIX_FMT_BGR24, parameters.i_width,parameters.i_height,PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
}I’m using VLC as client whatever number i set i_fps_num to, I always get 12-14 FPS. fore example, in VLC Codec tab shows 25 FPS but in Stream statistics tab it shows it only display 13 FPS on average. here is the X264 encoder output
x264 [debug]: frame= 72 QP=22.24 NAL=2 Slice:P Poc:144 I:97 P:116 SKIP:987 size=1464 bytes
x264 [info]: frame I:1 Avg QP:20.06 size: 17848
x264 [info]: frame P:72 Avg QP:22.12 size: 1337
x264 [info]: mb I I16..4: 40.2% 0.0% 59.8%
x264 [info]: mb P I16..4: 3.1% 0.0% 2.3% P16..4: 8.3% 2.0% 0.6% 0.0% 0.0% skip:83.7%
x264 [info]: coded y,uvDC,uvAC intra: 53.6% 46.4% 7.4% inter: 3.0% 1.6% 0.0%
x264 [info]: i16 v,h,dc,p: 11% 65% 12% 12%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 46% 16% 3% 4% 3% 5% 3% 6%
x264 [info]: i8c dc,h,v,p: 46% 42% 10% 2%
x264 [info]: kb/s:312.60the last frame number that was encoded is 72 while in VLC stream statistics it shows that 133 frames are Displayed and 66 blocks are decoded for 10 seconds streaming in addition the video playback is bursty.
my question is how to change the x264 parameters to get 25 FPS ?
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Video streaming- control frame rate x264
3 mars 2017, par H.AI’m new to video coding, I found this https://github.com/RafaelPalomar/H264LiveStreamer application code very useful to my project. I want to live stream a webcam over RTP . However, I’m having problem selecting the Frame Per Seconds (FPS). below is the function that controls the encoding param.
void x264Encoder::initilize()
{
x264_param_default_preset(&parameters, "veryfast", "zerolatency");
parameters.i_log_level = X264_LOG_DEBUG;
parameters.i_threads = 1;
parameters.i_width = 640;
parameters.i_height = 480;
parameters.i_fps_num = 25;
parameters.i_fps_den = 1;
parameters.i_keyint_max = 25;
parameters.b_intra_refresh = 1;
parameters.rc.i_rc_method = X264_RC_CRF;
parameters.rc.i_vbv_buffer_size = 1000000;
parameters.rc.i_vbv_max_bitrate = 90000;
parameters.rc.f_rf_constant = 25;
parameters.rc.f_rf_constant_max = 35;
parameters.i_sps_id = 7;
// the following two value you should keep 1
parameters.b_repeat_headers = 1; // to get header before every I-Frame
parameters.b_annexb = 1; // put start code in front of nal. we will remove start code later
x264_param_apply_profile(&parameters, "baseline");
encoder = x264_encoder_open(&parameters);
x264_picture_alloc(&picture_in, X264_CSP_I420, parameters.i_width, parameters.i_height);
picture_in.i_type = X264_TYPE_AUTO;
picture_in.img.i_csp = X264_CSP_I420;
// i have initilized my color space converter for BGR24 to YUV420 because my opencv video capture gives BGR24 image. You can initilize according to your input pixelFormat
convertContext = sws_getContext(parameters.i_width,parameters.i_height, PIX_FMT_BGR24, parameters.i_width,parameters.i_height,PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
}I’m using VLC as client whatever number i set i_fps_num to, I always get 12-14 FPS. fore example, in VLC Codec tab shows 25 FPS but in Stream statistics tab it shows it only display 13 FPS on average. here is the X264 encoder output
x264 [debug]: frame= 72 QP=22.24 NAL=2 Slice:P Poc:144 I:97 P:116 SKIP:987 size=1464 bytes
x264 [info]: frame I:1 Avg QP:20.06 size: 17848
x264 [info]: frame P:72 Avg QP:22.12 size: 1337
x264 [info]: mb I I16..4: 40.2% 0.0% 59.8%
x264 [info]: mb P I16..4: 3.1% 0.0% 2.3% P16..4: 8.3% 2.0% 0.6% 0.0% 0.0% skip:83.7%
x264 [info]: coded y,uvDC,uvAC intra: 53.6% 46.4% 7.4% inter: 3.0% 1.6% 0.0%
x264 [info]: i16 v,h,dc,p: 11% 65% 12% 12%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 46% 16% 3% 4% 3% 5% 3% 6%
x264 [info]: i8c dc,h,v,p: 46% 42% 10% 2%
x264 [info]: kb/s:312.60the last frame number that was encoded is 72 while in VLC stream statistics it shows that 133 frames are Displayed and 66 blocks are decoded for 10 seconds streaming in addition the video playback is bursty.
my question is how to change the x264 parameters to get 25 FPS ?
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How to compress webcam videos recorded by html5 MediaRecorder api ?
19 mai 2017, par JasonYI successfully recorded my webcam using MediaRecorder api and the resulting filesizes seemed far too big for their quality.
For example, for an 8 second video that was 480x640 I got a 1mB file size. That does not seem right.
My code to record()
navigator.mediaDevices.getUserMedia({video: true, audio: true})
.then(function(stream){
var options = {
mimeType : "video/webm;codecs=vp9"
//I don't set bitrate here even if I do the quality is too bad
}
var media_recorder = new MediaRecorder(media_stream, options);
var recorded_data = [];
media_recorder.ondataavailable = function(e){
recorded_data.push(e.data);
}
media_recorder.onstop = function(e){
recorded_data.push(e.data);
var recorded_blob = new Blob(recorded_data, { 'type' : 'video/webm; codecs=vp9' });
var recorded_video_url = window.URL.createObjectURL(recorded_blob);
//here I write some code to download the blob from this url through a href
}
})The file obtained by this method is unreasonably large which makes me wonder if it was even compressed when encoded by VP9 ? A 7 second video is about 870kB !
Inspecting the file with a mediainfo tool gives me
General
Count : 323
Count of stream of this kind : 1
Kind of stream : General
Kind of stream : General
Stream identifier : 0
Count of video streams : 1
Count of audio streams : 1
Video_Format_List : VP9
Video_Format_WithHint_List : VP9
Codecs Video : V_VP9
Video_Language_List : English
Audio_Format_List : Opus
Audio_Format_WithHint_List : Opus
Audio codecs : Opus
Audio_Language_List : English
Complete name : recorded_video.webm
File name : recorded_video
File extension : webm
Format : WebM
Format : WebM
Format/Url : http://www.webmproject.org/
Format/Extensions usually used : webm
Commercial name : WebM
Format version : Version 2
Internet media type : video/webm
Codec : WebM
Codec : WebM
Codec/Url : http://www.webmproject.org/
Codec/Extensions usually used : webm
File size : 867870
File size : 848 KiB
File size : 848 KiB
File size : 848 KiB
File size : 848 KiB
File size : 847.5 KiB
File last modification date : UTC 2017-05-19 05:48:00
File last modification date (local) : 2017-05-19 17:48:00
Writing application : Chrome
Writing application : Chrome
Writing library : Chrome
Writing library : Chrome
IsTruncated : Yes
Video
Count : 332
Count of stream of this kind : 1
Kind of stream : Video
Kind of stream : Video
Stream identifier : 0
StreamOrder : 1
ID : 2
ID : 2
Unique ID : 62101435245162993
Format : VP9
Commercial name : VP9
Codec ID : V_VP9
Codec ID/Url : http://www.webmproject.org/
Codec : V_VP9
Codec : V_VP9
Width : 640
Width : 640 pixels
Height : 480
Height : 480 pixels
Pixel aspect ratio : 1.000
Display aspect ratio : 1.333
Display aspect ratio : 4:3
Frame rate mode : VFR
Frame rate mode : Variable
Language : en
Language : English
Language : English
Language : en
Language : eng
Language : en
Default : Yes
Default : Yes
Forced : No
Forced : No
Audio
Count : 272
Count of stream of this kind : 1
Kind of stream : Audio
Kind of stream : Audio
Stream identifier : 0
StreamOrder : 0
ID : 1
ID : 1
Unique ID : 32224324715799545
Format : Opus
Format/Url : http://opus-codec.org/
Commercial name : Opus
Internet media type : audio/opus
Codec ID : A_OPUS
Codec ID/Url : http://opus-codec.org
Codec : Opus
Codec : Opus
Codec/Family : PCM
Channel(s) : 1
Channel(s) : 1 channel
Channel positions : Front: C
Channel positions : 1/0/0
Sampling rate : 48000
Sampling rate : 48.0 KHz
Compression mode : Lossy
Compression mode : Lossy
Delay : 718
Delay : 718ms
Delay : 718ms
Delay : 718ms
Delay : 00:00:00.718
Delay, origin : Container
Delay, origin : Container
Language : en
Language : English
Language : English
Language : en
Language : eng
Language : en
Default : Yes
Default : Yes
Forced : No
Forced : NoWhat did I do wrong ? Do I have to re-encode it after the chunks get appended ? Is there some attribute I’m missing ? VP9 is supposed to reduce file sizes drastically.
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