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Médias (1)
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Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Video
Autres articles (80)
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Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
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Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)
Sur d’autres sites (12823)
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Trying to understand the ffmpeg seek cut functionality
13 février 2020, par user3841429I have a video where I would like to cut a part from. The command I use :
ffmpeg -ss 526.623 -t 347.986 -i 'example.mp4' -c copy -avoid_negative_ts 1 -y res.mp4Where expected length is
00:05:47.99. The process log shows the following :...
frame=10582 fps=8258 q=-1.0 Lsize= 1061446kB time=00:05:47.98 bitrate=24987.8kbits/s speed= 272x
video:1044531kB audio:16556kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.033789%As you can see
time=00:05:47.98as expected, but when I play this video in player I see that it has extra 5 seconds of video at the end. I check the playtime length :$ ffmpeg -i 'res.mp4' 2>&1 | grep Duration | cut -d ' ' -f 4 | sed s/,//
00:05:53.11What the... My clue was the GOP’s I-frame, but when I modify my commands as :
ffmpeg -ss 526.623 -t 347 -i 'example.mp4' -c copy -avoid_negative_ts 1 -y res.mp4Output shows
time=00:05:46.99and actual video length is00:05:52.13In the first case it added
5.13sec, in the second5.14. Let’s take5.14for both cases that show that it has nothing to do with I-frame. There is no magic in this world (I guess). But what then ?UPD : It is GOP in the begging of the video. For this video it’s about 7 seconds.
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Live streaming : node-media-server + Dash.js configured for real-time low latency
7 juillet 2021, par MaorationWe're working on an app that enables live monitoring of your back yard.
Each client has a camera connected to the internet, streaming to our public node.js server.



I'm trying to use node-media-server to publish an MPEG-DASH (or HLS) stream to be available for our app clients, on different networks, bandwidths and resolutions around the world.



Our goal is to get as close as possible to live "real-time" so you can monitor what happens in your backyard instantly.



The technical flow already accomplished is :



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ffmpeg process on our server processes the incoming camera stream (separate child process for each camera) and publishes the stream via RTSP on the local machine for node-media-server to use as an 'input' (we are also saving segmented files, generating thumbnails, etc.). the ffmpeg command responsible for that is :



-c:v libx264 -preset ultrafast -tune zerolatency -b:v 900k -f flv rtmp://127.0.0.1:1935/live/office -
node-media-server is running with what I found as the default configuration for 'live-streaming'



private NMS_CONFIG = {
server: {
 secret: 'thisisnotmyrealsecret',
},
rtmp_server: {
 rtmp: {
 port: 1935,
 chunk_size: 60000,
 gop_cache: false,
 ping: 60,
 ping_timeout: 30,
 },
 http: {
 port: 8888,
 mediaroot: './server/media',
 allow_origin: '*',
 },
 trans: {
 ffmpeg: '/usr/bin/ffmpeg',
 tasks: [
 {
 app: 'live',
 hls: true,
 hlsFlags: '[hls_time=2:hls_list_size=3:hls_flags=delete_segments]',
 dash: true,
 dashFlags: '[f=dash:window_size=3:extra_window_size=5]',
 },
 ],
 },
},



} ;
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As I understand it, out of the box NMS (node-media-server) publishes the input stream it gets in multiple output formats : flv, mpeg-dash, hls.
with all sorts of online players for these formats I'm able to access and the stream using the url on localhost. with mpeg-dash and hls I'm getting anything between 10-15 seconds of delay, and more.











My goal now is to implement a local client-side mpeg-dash player, using dash.js and configure it to be as close as possible to live.



my code for that is :







 
 
 
 
 
 <div>
 <video autoplay="" controls=""></video>
 </div>
 <code class="echappe-js"><script src="https://cdnjs.cloudflare.com/ajax/libs/dashjs/3.0.2/dash.all.min.js"></script>

<script>&#xD;&#xA; (function(){&#xD;&#xA; // var url = "https://dash.akamaized.net/envivio/EnvivioDash3/manifest.mpd";&#xD;&#xA; var url = "http://localhost:8888/live/office/index.mpd";&#xD;&#xA; var player = dashjs.MediaPlayer().create();&#xD;&#xA; &#xD;&#xA; &#xD;&#xA;&#xD;&#xA; // config&#xD;&#xA; targetLatency = 2.0; // Lowering this value will lower latency but may decrease the player&#x27;s ability to build a stable buffer.&#xD;&#xA; minDrift = 0.05; // Minimum latency deviation allowed before activating catch-up mechanism.&#xD;&#xA; catchupPlaybackRate = 0.5; // Maximum catch-up rate, as a percentage, for low latency live streams.&#xD;&#xA; stableBuffer = 2; // The time that the internal buffer target will be set to post startup/seeks (NOT top quality).&#xD;&#xA; bufferAtTopQuality = 2; // The time that the internal buffer target will be set to once playing the top quality.&#xD;&#xA;&#xD;&#xA;&#xD;&#xA; player.updateSettings({&#xD;&#xA; &#x27;streaming&#x27;: {&#xD;&#xA; &#x27;liveDelay&#x27;: 2,&#xD;&#xA; &#x27;liveCatchUpMinDrift&#x27;: 0.05,&#xD;&#xA; &#x27;liveCatchUpPlaybackRate&#x27;: 0.5,&#xD;&#xA; &#x27;stableBufferTime&#x27;: 2,&#xD;&#xA; &#x27;bufferTimeAtTopQuality&#x27;: 2,&#xD;&#xA; &#x27;bufferTimeAtTopQualityLongForm&#x27;: 2,&#xD;&#xA; &#x27;bufferToKeep&#x27;: 2,&#xD;&#xA; &#x27;bufferAheadToKeep&#x27;: 2,&#xD;&#xA; &#x27;lowLatencyEnabled&#x27;: true,&#xD;&#xA; &#x27;fastSwitchEnabled&#x27;: true,&#xD;&#xA; &#x27;abr&#x27;: {&#xD;&#xA; &#x27;limitBitrateByPortal&#x27;: true&#xD;&#xA; },&#xD;&#xA; }&#xD;&#xA; });&#xD;&#xA;&#xD;&#xA; console.log(player.getSettings());&#xD;&#xA;&#xD;&#xA; setInterval(() => {&#xD;&#xA; console.log(&#x27;Live latency= &#x27;, player.getCurrentLiveLatency());&#xD;&#xA; console.log(&#x27;Buffer length= &#x27;, player.getBufferLength(&#x27;video&#x27;));&#xD;&#xA; }, 3000);&#xD;&#xA;&#xD;&#xA; player.initialize(document.querySelector("#videoPlayer"), url, true);&#xD;&#xA;&#xD;&#xA; })();&#xD;&#xA;&#xD;&#xA; </script>
 








with the online test video (https://dash.akamaized.net/envivio/EnvivioDash3/manifest.mpd) I see that the live latency value is close to 2 secs (but I have no way to actually confirm it. it's a video file streamed. in my office I have a camera so I can actually compare latency between real-life and the stream I get).
however when working locally with my NMS, it seems this value does not want to go below 20-25 seconds.



Am I doing something wrong ? any configuration on the player (client-side html) I'm forgetting ?
or is there a missing configuration I should add on the server side (NMS) ?


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Video watermarking with ffmpeg (output video size too big )
22 janvier 2020, par kartik bansali am running ffmpeg on video of size around 2 Mb and after watermarking them size of my video file is around 13-17 Mb. AM i doing something wrong. Please Help
My code is
ffmpeg -i "C:\flask\mobile_form\Videos\20191231140058_987654567.mp4" -i "C:\flask\mobile_form\resizeLogo.jpg" -filter_complex "[0:v][1:v]overlay=10:10,drawtext=text=Hello:fontsize=24:x=main_w-200:y=main_h-100,drawtext=text=World:fontsize=24:x=main_w-200:y=main_h-60" "C:\flask\mobile_form\waterMark\second.mp4"This is my full log, It is not giving any error but i want my output file to be smaller.
ffmpeg version git-2020-01-15-0dc0837 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.2.1 (GCC) 20200111
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
libavutil 56. 38.100 / 56. 38.100
libavcodec 58. 65.103 / 58. 65.103
libavformat 58. 35.102 / 58. 35.102
libavdevice 58. 9.103 / 58. 9.103
libavfilter 7. 71.100 / 7. 71.100
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100Continued
Metadata:
encoder : Chrome
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0(eng): Audio: opus, 48000 Hz, mono, fltp (default)
Stream #0:1(eng): Video: vp8, yuv420p(progressive), 640x480, SAR 1:1 DAR 4:3, 1k tbr, 1k tbn, 1k tbc (default)
Metadata:
alpha_mode : 1
Duration: 00:00:00.04, start: 0.000000, bitrate: 1727 kb/s
Stream #1:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 255x122 [SAR 120:120 DAR 255:122], 25 tbr, 25 tbn, 25 tbc
Fontconfig error: Cannot load default config file
[Parsed_drawtext_1 @ 000001ba5309d4c0] Using "C:/WINDOWS/fonts/mingliub.ttc"
Fontconfig error: Cannot load default config file
[Parsed_drawtext_2 @ 000001ba53051640] Using "C:/WINDOWS/fonts/mingliub.ttc"
Stream mapping:
Stream #0:1 (vp8) -> overlay:main (graph 0)
Stream #1:0 (mjpeg) -> overlay:overlay (graph 0)
drawtext (graph 0) -> Stream #0:0 (libx264)
Stream #0:0 -> #0:1 (opus (native) -> aac (native))
Press [q] to stop, [?] for help
Fontconfig error: Cannot load default config file
[Parsed_drawtext_1 @ 000001ba53c06280] Using "C:/WINDOWS/fonts/mingliub.ttc"
Fontconfig error: Cannot load default config file
[Parsed_drawtext_2 @ 000001ba53c40d40] Using "C:/WINDOWS/fonts/mingliub.ttc"
[swscaler @ 000001ba53caf380] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 000001ba5304e240] using SAR=1/1
[libx264 @ 000001ba5304e240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 000001ba5304e240] profile High, level 5.2, 4:2:0, 8-bit
[libx264 @ 000001ba5304e240] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: 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=15 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
Output #0, mp4, to 'C:\Users\3427521kar\Desktop\New folder (2)\output30.mp4':
Metadata:
encoder : Lavf58.35.102
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 1k fps, 16k tbn, 1k tbc (default)
Metadata:
encoder : Lavc58.65.103 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 69 kb/s (default)
Metadata:
[libx264 @ 000001ba5304e240] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 000001ba5304e240] ref P L0: 77.1% 13.5% 8.3% 1.0% 0.0%
[libx264 @ 000001ba5304e240] ref B L0: 75.0% 24.5% 0.5%
[libx264 @ 000001ba5304e240] ref B L1: 94.1% 5.9%
[libx264 @ 000001ba5304e240] kb/s:1380.55
[aac @ 000001ba53067100] Qavg: 129.494here is the full log of my code
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