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Exemple de boutons d’action pour une collection collaborative
27 février 2013, par
Mis à jour : Mars 2013
Langue : français
Type : Image
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Exemple de boutons d’action pour une collection personnelle
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Mis à jour : Février 2013
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Autres articles (99)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 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, parMultilang 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. -
L’agrémenter visuellement
10 avril 2011MediaSPIP est basé sur un système de thèmes et de squelettes. Les squelettes définissent le placement des informations dans la page, définissant un usage spécifique de la plateforme, et les thèmes l’habillage graphique général.
Chacun peut proposer un nouveau thème graphique ou un squelette et le mettre à disposition de la communauté.
Sur d’autres sites (12957)
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ffmpeg : use vidstabtransform to overlay it over blurred background
5 novembre 2023, par konewkaI am using
ffmpegto concatenate multiple video clips taken from the same object over multiple timeframes. To make sure the videos are properly aligned (and therefore show the object in rougly the same position), I manually identify two points in the first frame each clip, and use that to calculate the scaling and positioning necessary for proper alignment. I'm using Python for this, and it also generates the ffmpeg command for me. When it has calculated that the appropriate scale of the video is less than 100%, that means that some parts of the frame will become black. To counter that, I overlay the scaled and positioned video over a blurred version of the original video (like this effect)

Now, additionally, some of the video clips are a bit shaky, so my flow now first applies the
vidstabdetectandvidstabtransformfilters, and uses the transformed stabilized version as input for my final command. However, if the shaking is significant, thevidstabtransformwill zoom in and therefore I will either lose some of the details around the edges, or a black border is created around the edge. As I am later including the stabilized version of the video in the concatenation, with the possibility of it shrinking, I would rather perform thevidstabtransformstep inside my command, and use the output directly into the overlay over the blurred version. That way, I would want to achieve that the clip rotates across the frame as it is stabilized, and it is shown over the blurred background. Is it possible to achieve this using ffmpeg, or am I trying to stretch it too far ?

As a minimal example, these are my commands :


ffmpeg -i video1.mp4 -vf vidstabdetect=output=transform.trf -f null - 

ffmpeg -i video1.mp4 -vf vidstabtransform=input=transform.trf video1_stabilized.mp4

# same for video2.mp4

ffmpeg -i video1_stabilized.mp4 -i video2_stabilized.mp4 -filter_complex "
 [0:v]split=2[v0blur][v0scale];
 [v0blur]gblur=sigma=50[v0blur]; // blur the video
 [v0scale]scale=round(iw*0.8/2)*2:round(ih*0.8/2)*2[v0scale]; // scale the video
 [v0blur][v0scale]overlay=x=100:y=200[v0]; // overlay the scaled video over the blur at a specific location
 [1:v]split=2[v1blur][v1scale];
 [v1blur]gblur=sigma=50[v1blur];
 [v1scale]scale=round(iw*0.9/2)*2:round(ih*0.9/2)*2[v1scale];
 [v1blur][v1scale]overlay=x=150:y=150[v1];
 [v0][v1]concat=n=2 // concatenate the two clips" 
-c:v libx264 -r 30 out.mp4


So, I know I can put the
vidstabtransformstep into thefilter_complex-graph (I'll do the detection in a separate step still), but can I also use it such that I can achieve the stabilization over the blurred background and have the clip move around the frame as it is stabilized ?

EDIT : so to include
vidstabtransforminto the filter graph, it would then look like this :

ffmpeg -i video1.mp4 -i video2.mp4 -filter_complex "
 [0:v]vidstabtransform=input=transform1.trf[v0stab]
 [v0stab]split=2[v0blur][v0scale];
 [v0blur]gblur=sigma=50[v0blur];
 [v0scale]scale=round(iw*0.8/2)*2:round(ih*0.8/2)*2[v0scale];
 [v0blur][v0scale]overlay=x=100:y=200[v0];
 [1:v]vidstabtransform=input=transform2.trf[v1stab]
 [v1stab]split=2[v1blur][v1scale];
 [v1blur]gblur=sigma=50[v1blur];
 [v1scale]scale=round(iw*0.9/2)*2:round(ih*0.9/2)*2[v1scale];
 [v1blur][v1scale]overlay=x=150:y=150[v1];
 [v0][v1]concat=n=2"
-c:v libx264 -r 30 out.mp4


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Not getting partial video content while using ffmpeg
1er mai 2023, par MI SabicI'm trying to partially send a video using nodejs and
fluent-ffmpeg. But it's failing to send the data.

When I send the video using only
fsmodule only, it works fine. Here's the code.

const express = require("express");
const app = express(); 
const fs = require("fs");

const VIDEO_PATH = 'video.mp4';

app.get("/", (req, res) => {
 res.sendFile(__dirname + "/index.html");
})

app.get("/video", (req, res) => {
 const range = req.headers.range;
 if(!range) {
 res.status(400).send("Requires range header!");
 }

 const size = fs.statSync(VIDEO_PATH).size;
 const CHUNK_SIZE = 10**6;
 const start = Number(range.replace(/\D/g, ""));
 const end = Math.min(start + CHUNK_SIZE, size - 1);

 const contentLength = end - start + 1;

 const headers = {
 "Content-Range": `bytes ${start}-${end}/${size}`,
 "Accept-Ranges": 'bytes',
 "Content-Length": contentLength, 
 "Content-Type": "video/mp4"
 }

 res.writeHead(206, headers);

 const videoStream = fs.createReadStream(VIDEO_PATH, {start, end});
 videoStream.pipe(res);
})

app.listen(3000, () => {
 console.log("Server is running on port: ", 3000);
})


When I send the video after processing it using
fluent-ffmpegmodule, it doesn't work. I've simplified the code for understanding. Here's my code.

const express = require("express");
const app = express(); 
const fs = require("fs");
const ffmpegStatic = require('ffmpeg-static');
const ffmpeg = require('fluent-ffmpeg');

ffmpeg.setFfmpegPath(ffmpegStatic);

const VIDEO_PATH = 'video.mp4';

app.get("/", (req, res) => {
 res.sendFile(__dirname + "/index.html");
})

app.get("/video", (req, res) => {
 const range = req.headers.range;
 if(!range) {
 res.status(400).send("Requires range header!");
 }

 const size = fs.statSync(VIDEO_PATH).size;
 const CHUNK_SIZE = 10**6;
 const start = Number(range.replace(/\D/g, ""));
 const end = Math.min(start + CHUNK_SIZE, size - 1);

 const contentLength = end - start + 1;

 const headers = {
 "Content-Range": `bytes ${start}-${end}/${size}`,
 "Accept-Ranges": 'bytes',
 "Content-Length": contentLength, 
 "Content-Type": "video/mp4"
 }

 res.writeHead(206, headers);

 const videoStream = fs.createReadStream(VIDEO_PATH, {start, end});

 ffmpeg(videoStream)
 .outputOptions('-movflags frag_keyframe+empty_moov')
 .toFormat('mp4')
 .pipe(res);
})

app.listen(3000, () => {
 console.log("Server is running on port: ", 3000);
})


My
index.html




 
 
 
 


 <video width="50%" controls="controls">
 <source src="/video" type="video/mp4">
 </source></video>




Any help would be appreciated. Thanks in advance.


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I have an application in flask where it streams a camera using ffmpeg, the problem is that I can not display the video from the camera using the GPU [closed]
17 janvier, par RubenI'll put you in context, I am using flask (python) to display a camera in the browser to stream it, for this I use the following Python code :


command = [
 'ffmpeg',
 '-loglevel', 'warning',
 '-rtsp_transport', 'tcp',
 '-i', self.config['url'],
 '-map', '0:v:0', # fuerzo que solo procese el video
 '-vf', f'fps={self.config["fps"]},scale=640:360:force_original_aspect_ratio=decrease',
 '-c:v', 'h264_nvenc', # especificamos que queremos tirar de la gpu de nvidia
 '-preset', 'p7', # ajusta para la maxima calidad/velocidad (p1 mas rapida pero peor calidad - p7 más lento pero mejor calidad)
 '-qp', self.config['quality'], # control de calidad del codificador (0 [mejor calidad] - 51 [peor calidad])
 '-pix_fmt', 'yuv444p', # se mete explicitamente el formato de pixeles
 '-color_range', 'pc',
 '-an', # desactiva el audio
 '-f', 'image2pipe',
 'pipe:1'
] 

self.process = subprocess.Popen(
 command,
 stdout=subprocess.PIPE,
 stderr=subprocess.PIPE,
 bufsize=10**8
)


The problem is that it does not display the video streaming, but it connects correctly to the camera.


On the other hand, It show me the following warnings, which may have something to do with the display, it's probably the second warning that has to do with the pixel format :


DEBUG :main:FFmpeg [camera1] : Guessed Channel Layout for Input Stream #0.1 : mono
DEBUG :main:FFmpeg [camera1] : [swscaler @ 0x560f70b78680] deprecated pixel format used, make sure you did set range correctly


The server has different encodes installed :


DEV.LS h264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders : h264 h264_v4l2m2m h264_qsv h264_cuvid ) (encoders : libx264 libx264rgb h264_nvenc h264_omx h264_qsv h264_v4l2m2m h264_vaapi nvenc nvenc_h264 )


Y uso el h264_nvenc, tambien el servidor tiene soporte de aceleración de hardware con :


libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Hardware acceleration methods :
vdpau
cuda
vaapi
qsv
drm
opencl


Between them h264_nvenc uses cuda


I expand a little on the information it provides me when using h264_nvenc :


Encoder h264_nvenc [NVIDIA NVENC H.264 encoder]:
 General capabilities: dr1 delay hardware
 Threading capabilities: none
 Supported hardware devices: cuda cuda
 Supported pixel formats: yuv420p nv12 p010le yuv444p p016le yuv444p16le bgr0 rgb0 cuda
h264_nvenc AVOptions:
 -preset <int> E..V....... Set the encoding preset (from 0 to 18) (default p4)
 default 0 E..V.......
 slow 1 E..V....... hq 2 passes
 medium 2 E..V....... hq 1 pass
 fast 3 E..V....... hp 1 pass
 hp 4 E..V.......
 hq 5 E..V.......
 bd 6 E..V.......
 ll 7 E..V....... low latency
 llhq 8 E..V....... low latency hq
 llhp 9 E..V....... low latency hp
 lossless 10 E..V.......
 losslesshp 11 E..V.......
 p1 12 E..V....... fastest (lowest quality)
 p2 13 E..V....... faster (lower quality)
 p3 14 E..V....... fast (low quality)
 p4 15 E..V....... medium (default)
 p5 16 E..V....... slow (good quality)
 p6 17 E..V....... slower (better quality)
 p7 18 E..V....... slowest (best quality)
 -tune <int> E..V....... Set the encoding tuning info (from 1 to 4) (default hq)
 hq 1 E..V....... High quality
 ll 2 E..V....... Low latency
 ull 3 E..V....... Ultra low latency
 lossless 4 E..V....... Lossless
 -profile <int> E..V....... Set the encoding profile (from 0 to 3) (default main)
 baseline 0 E..V.......
 main 1 E..V.......
 high 2 E..V.......
 high444p 3 E..V.......
 -level <int> E..V....... Set the encoding level restriction (from 0 to 62) (default auto)
 auto 0 E..V.......
 1 10 E..V.......
 1.0 10 E..V.......
 1b 9 E..V.......
 1.0b 9 E..V.......
 1.1 11 E..V.......
 1.2 12 E..V.......
 1.3 13 E..V.......
 2 20 E..V.......
 2.0 20 E..V.......
 2.1 21 E..V.......
 2.2 22 E..V.......
 3 30 E..V.......
 3.0 30 E..V.......
 3.1 31 E..V.......
 3.2 32 E..V.......
 4 40 E..V.......
 4.0 40 E..V.......
 4.1 41 E..V.......
 4.2 42 E..V.......
 5 50 E..V.......
 5.0 50 E..V.......
 5.1 51 E..V.......
 5.2 52 E..V.......
 6.0 60 E..V.......
 6.1 61 E..V.......
 6.2 62 E..V.......
 -rc <int> E..V....... Override the preset rate-control (from -1 to INT_MAX) (default -1)
 constqp 0 E..V....... Constant QP mode
 vbr 1 E..V....... Variable bitrate mode
 cbr 2 E..V....... Constant bitrate mode
 vbr_minqp 8388612 E..V....... Variable bitrate mode with MinQP (deprecated)
 ll_2pass_quality 8388616 E..V....... Multi-pass optimized for image quality (deprecated)
 ll_2pass_size 8388624 E..V....... Multi-pass optimized for constant frame size (deprecated)
 vbr_2pass 8388640 E..V....... Multi-pass variable bitrate mode (deprecated)
 cbr_ld_hq 8388616 E..V....... Constant bitrate low delay high quality mode
 cbr_hq 8388624 E..V....... Constant bitrate high quality mode
 vbr_hq 8388640 E..V....... Variable bitrate high quality mode
 -rc-lookahead <int> E..V....... Number of frames to look ahead for rate-control (from 0 to INT_MAX) (default 0)
 -surfaces <int> E..V....... Number of concurrent surfaces (from 0 to 64) (default 0)
 -cbr <boolean> E..V....... Use cbr encoding mode (default false)
 -2pass <boolean> E..V....... Use 2pass encoding mode (default auto)
 -gpu <int> E..V....... Selects which NVENC capable GPU to use. First GPU is 0, second is 1, and so on. (from -2 to INT_MAX) (default any)
 any -1 E..V....... Pick the first device available
 list -2 E..V....... List the available devices
 -delay <int> E..V....... Delay frame output by the given amount of frames (from 0 to INT_MAX) (default INT_MAX)
 -no-scenecut <boolean> E..V....... When lookahead is enabled, set this to 1 to disable adaptive I-frame insertion at scene cuts (default false)
 -forced-idr <boolean> E..V....... If forcing keyframes, force them as IDR frames. (default false)
 -b_adapt <boolean> E..V....... When lookahead is enabled, set this to 0 to disable adaptive B-frame decision (default true)
 -spatial-aq <boolean> E..V....... set to 1 to enable Spatial AQ (default false)
 -spatial_aq <boolean> E..V....... set to 1 to enable Spatial AQ (default false)
 -temporal-aq <boolean> E..V....... set to 1 to enable Temporal AQ (default false)
 -temporal_aq <boolean> E..V....... set to 1 to enable Temporal AQ (default false)
 -zerolatency <boolean> E..V....... Set 1 to indicate zero latency operation (no reordering delay) (default false)
 -nonref_p <boolean> E..V....... Set this to 1 to enable automatic insertion of non-reference P-frames (default false)
 -strict_gop <boolean> E..V....... Set 1 to minimize GOP-to-GOP rate fluctuations (default false)
 -aq-strength <int> E..V....... When Spatial AQ is enabled, this field is used to specify AQ strength. AQ strength scale is from 1 (low) - 15 (aggressive) (from 1 to 15) (default 8)
 -cq <float> E..V....... Set target quality level (0 to 51, 0 means automatic) for constant quality mode in VBR rate control (from 0 to 51) (default 0)
 -aud <boolean> E..V....... Use access unit delimiters (default false)
 -bluray-compat <boolean> E..V....... Bluray compatibility workarounds (default false)
 -init_qpP <int> E..V....... Initial QP value for P frame (from -1 to 51) (default -1)
 -init_qpB <int> E..V....... Initial QP value for B frame (from -1 to 51) (default -1)
 -init_qpI <int> E..V....... Initial QP value for I frame (from -1 to 51) (default -1)
 -qp <int> E..V....... Constant quantization parameter rate control method (from -1 to 51) (default -1)
 -weighted_pred <int> E..V....... Set 1 to enable weighted prediction (from 0 to 1) (default 0)
 -coder <int> E..V....... Coder type (from -1 to 2) (default default)
 default -1 E..V.......
 auto 0 E..V.......
 cabac 1 E..V.......
 cavlc 2 E..V.......
 ac 1 E..V.......
 vlc 2 E..V.......
 -b_ref_mode <int> E..V....... Use B frames as references (from 0 to 2) (default disabled)
 disabled 0 E..V....... B frames will not be used for reference
 each 1 E..V....... Each B frame will be used for reference
 middle 2 E..V....... Only (number of B frames)/2 will be used for reference
 -a53cc <boolean> E..V....... Use A53 Closed Captions (if available) (default true)
 -dpb_size <int> E..V....... Specifies the DPB size used for encoding (0 means automatic) (from 0 to INT_MAX) (default 0)
 -multipass <int> E..V....... Set the multipass encoding (from 0 to 2) (default disabled)
 disabled 0 E..V....... Single Pass
 qres 1 E..V....... Two Pass encoding is enabled where first Pass is quarter resolution
 fullres 2 E..V....... Two Pass encoding is enabled where first Pass is full resolution
 -ldkfs <int> E..V....... Low delay key frame scale; Specifies the Scene Change frame size increase allowed in case of single frame VBV and CBR (from 0 to 255) (default 0)
</int></int></int></boolean></int></int></int></int></int></int></int></boolean></boolean></float></int></boolean></boolean></boolean></boolean></boolean></boolean></boolean></boolean></boolean></boolean></int></int></boolean></boolean></int></int></int></int></int></int></int>

If anyone has some idea or needs more information to help me, I would appreciate it.


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