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Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
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Mediabox : ouvrir les images dans l’espace maximal pour l’utilisateur
8 février 2011, parLa visualisation des images est restreinte par la largeur accordée par le design du site (dépendant du thème utilisé). Elles sont donc visibles sous un format réduit. Afin de profiter de l’ensemble de la place disponible sur l’écran de l’utilisateur, il est possible d’ajouter une fonctionnalité d’affichage de l’image dans une boite multimedia apparaissant au dessus du reste du contenu.
Pour ce faire il est nécessaire d’installer le plugin "Mediabox".
Configuration de la boite multimédia
Dès (...) -
Les statuts des instances de mutualisation
13 mars 2010, parPour des raisons de compatibilité générale du plugin de gestion de mutualisations avec les fonctions originales de SPIP, les statuts des instances sont les mêmes que pour tout autre objets (articles...), seuls leurs noms dans l’interface change quelque peu.
Les différents statuts possibles sont : prepa (demandé) qui correspond à une instance demandée par un utilisateur. Si le site a déjà été créé par le passé, il est passé en mode désactivé. publie (validé) qui correspond à une instance validée par un (...)
Sur d’autres sites (6974)
-
Problem in access "libavcodec/avcodec.h" in CPP [duplicate]
14 septembre 2021, par SujayNote : Not full working code but part of the code.
Problem is when trying to compile it shows the below output.
FFMPEG have installed.
No flag in VS code but error occurred on compile time.
Thanks in Advance.


#include<bits></bits>stdc++.h>
#include<opencv2></opencv2>opencv.hpp>

extern "C" {
 #include "libavcodec/avcodec.h"
 #include "libavformat/avformat.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/pixfmt.h"
 #include "libswscale/swscale.h"
}

using namespace std;
using namespace cv;

int main(){



 AVPacket avpkt; int err, frame_decoded = 0;
 AVCodec *codec = avcodec_find_decoder ( AV_CODEC_ID_H264 );
 AVCodecContext *codecCtx = avcodec_alloc_context3 ( codec );
 avcodec_open2 ( codecCtx, codec, NULL );
 // Set avpkt data and size here
 // err = avcodec_decode_video2 ( codecCtx, avframe, &frame_decoded, &avpkt );
 return EXIT_SUCCESS;
}



Output :


h264.cpp:(.text+0x15): undefined reference to `avcodec_find_decoder'
h264.cpp:(.text+0x25): undefined reference to `avcodec_alloc_context3'
h264.cpp:(.text+0x41): undefined reference to `avcodec_open2'
collect2: error: ld returned 1 exit status 


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ffmpeg can't access to usb webcam from python subprocess.Popen in windows
29 avril 2021, par TomezIf I run the following ffmpeg command from windows cmd it works


ffmpeg -f dshow -i video="USB Video Device" -s 1280x720 -f rawvideo -pix_fmt rgb24 pipe:


I then tried to execute the same in python

Python 3.7.4 (tags/v3.7.4:e09359112e, Jul 8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)] on win32

args = [
 'ffmpeg', '-f', 'dshow', '-i', 'video=USB Video Device', '-s', '1280x720',
 '-f', 'rawvideo', '-pix_fmt','rgb24', 'pipe:'
]
ffmpeg_proc = subprocess.Popen(args, stdout=subprocess.PIPE)


but I get this error


D:\Projects\Applications\VideoCapture\Virtualenv\Scripts\python.exe D:/Projects/Applications/VideoCapture/Sources/Application/video_capture.py "USB Video Device" 1280 720
ffmpeg version 4.4-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 10.2.0 (Rev6, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 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
Input #0, dshow, from 'video=USB Video Device':
 Duration: N/A, bitrate: N/A
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 30 fps, 30 tbr, 10000k tbn, 10000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
Press [q] to stop, [?] for help
video=USB Video Device: I/O error
Output #0, rawvideo, to 'pipe:':
 Metadata:
 encoder : Lavf58.76.100
 Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 1280x720, q=2-31, 663552 kb/s, 30 fps, 30 tbn
 Metadata:
 encoder : Lavc58.134.100 rawvideo
frame= 0 fps=0.0 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A speed= 0x 
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)


The inportant row is USB Video Device : I/O error

I've tried also to add shell=True to the Popen but with the same result.

Doing some tests I found that using pycharm debug mode or simply lunching the same code inside "Pycharm Python Console" no more I/O error and all seems to work. I think something changes in the environment created for the subrocess but I wasn't able to understand what PyCharm is doing under the hood.


Here the output inside PyCharm Python Console


D:\Projects\Applications\VideoCapture\Virtualenv\Scripts\python.exe "C:\Program Files\JetBrains\PyCharm Community Edition 2019.1.1\plugins\python-ce\helpers\pydev\pydevconsole.py" --mode=client --port=65058
import sys; print('Python %s on %s' % (sys.version, sys.platform))
sys.path.extend(['D:\\Projects\\Applications\\VideoCapture', 'D:\\Projects\\Applications\\VideoCapture\\Sources\\Application', 'D:\\Projects\\Applications\\VideoCapture\\Sources\\Compiler', 'D:/Projects/Applications/VideoCapture'])
PyDev console: starting.
Python 3.7.4 (tags/v3.7.4:e09359112e, Jul 8 2019, 20:34:20) [MSC v.1916 64 bit (AMD64)] on win32
runfile('D:/Projects/Applications/VideoCapture/Sources/Application/video_capture.py', args=['USB Video Device', '1280', '720'], wdir='D:/Projects/Applications/VideoCapture/Sources/Application')
ffmpeg version 4.4-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 10.2.0 (Rev6, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 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
Input #0, dshow, from 'video=USB Video Device':
 Duration: N/A, start: 111984.462000, bitrate: N/A
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 30 fps, 30 tbr, 10000k tbn, 10000k tbc
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
Press [q] to stop, [?] for help
Output #0, rawvideo, to 'pipe:':
 Metadata:
 encoder : Lavf58.76.100
 Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24(pc, progressive), 1280x720, q=2-31, 663552 kb/s, 30 fps, 30 tbn
 Metadata:
 encoder : Lavc58.134.100 rawvideo
av_interleaved_write_frame(): Invalid argument
 Last message repeated 1 times
Error writing trailer of pipe:: Invalid argument
frame= 118 fps= 30 q=-0.0 Lsize= 313200kB time=00:00:03.93 bitrate=652306.1kbits/s dup=53 drop=0 speed= 1x


Does anyone now how to fix this problem or have any knowledge on how PyCharm Python Console works ?


-
Why storage access functions not working on android 10 API-29 ? error=13, Permission denied ?
8 janvier 2021, par Rpatel

This example code is to create video from images and music.
Code running on till API level 28 but when I just upgrade to
Build version 29 then it starts crashing. I tried the most solution
but could not find the proper reason and solution.

Please let me know...



2


021-01-08 19:48:16.045 18413-19578/com.example.photovideomaker E/audio: io
 java.io.IOException: Cannot run program "/data/user/0/com.example.photovideomaker/files/ffmpeg": error=13, Permission denied
 at java.lang.ProcessBuilder.start(ProcessBuilder.java:1050)
 at java.lang.Runtime.exec(Runtime.java:698)
 at java.lang.Runtime.exec(Runtime.java:563)
 at com.example.photovideomaker.service.CreateVideoService.joinAudio(CreateVideoService.java:252)
 at com.example.photovideomaker.service.CreateVideoService.createVideo(CreateVideoService.java:89)
 at com.example.photovideomaker.service.CreateVideoService.onHandleIntent(CreateVideoService.java:83)
 at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:78)
 at android.os.Handler.dispatchMessage(Handler.java:107)
 at android.os.Looper.loop(Looper.java:214)
 at android.os.HandlerThread.run(HandlerThread.java:67)
 Caused by: java.io.IOException: error=13, Permission denied
 at java.lang.UNIXProcess.forkAndExec(Native Method)
 at java.lang.UNIXProcess.<init>(UNIXProcess.java:133)
 at java.lang.ProcessImpl.start(ProcessImpl.java:141)
 at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
 at java.lang.Runtime.exec(Runtime.java:698) 
 at java.lang.Runtime.exec(Runtime.java:563) 
 at com.example.photovideomaker.service.CreateVideoService.joinAudio(CreateVideoService.java:252) 
 at com.example.photovideomaker.service.CreateVideoService.createVideo(CreateVideoService.java:89) 
 at com.example.photovideomaker.service.CreateVideoService.onHandleIntent(CreateVideoService.java:83) 
 at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:78) 
 at android.os.Handler.dispatchMessage(Handler.java:107) 
 at android.os.Looper.loop(Looper.java:214) 
 at android.os.HandlerThread.run(HandlerThread.java:67) 
</init>



This function throwing the error "On Process.runtime"




private void createVideo() {
 long startTime = System.currentTimeMillis();
 toatalSecond = (application.getSecond() * ((float) application.getSelectedImages().size())) - DEFAULT_FONT_SCALE;
 joinAudio();
 while (true) {
 if (ImageCreatorService.isImageComplate) {
 Log.e("image creation ", " complte");

 break;
 }else {
 Log.e("image creation ", "not complte");
 }
 }
 Log.e("createVideo", "video create start");
 new File(FileUtils.TEMP_DIRECTORY, "video.txt").delete();
 for (int i = 0; i < application.videoImages.size(); i++) {
 appendVideoLog(String.format("file '%s'", application.videoImages.get(i)));
 }

 File r0=new File(FileUtils.TEMP_DIRECTORY, "video.txt");
 String videoPath = new File(FileUtils.APP_DIRECTORY, getVideoName()).getAbsolutePath();
 String[] inputCode = application.getMusicData() != null ? new String[]{
 FileUtils.getFFmpeg(this), "-r",
 String.valueOf(BitmapDescriptorFactory.HUE_ORANGE / application.getSecond()),
 "-f", "concat", "-safe", "0", "-i", r0.getAbsolutePath(), "-i",
 audioFile.getAbsolutePath(), "-strict", "experimental", "-r", "30",
 "-t", String.valueOf(toatalSecond), "-c:v", "libx264", "-preset",
 "ultrafast", "-pix_fmt", "yuv420p", "-ac", "2", videoPath}
 : new String[]{FileUtils.getFFmpeg(this),
 "-r", String.valueOf(BitmapDescriptorFactory.HUE_ORANGE / application.getSecond()),
 "-f", "concat", "-i", r0.getAbsolutePath(), "-r", "30", "-c:v", "libx264", "-preset", "ultrafast", "-pix_fmt", "yuv420p", videoPath};

 System.gc();
 Process process = null;
 try {
 process = Runtime.getRuntime().exec(inputCode);
 while (!Util.isProcessCompleted(process)) {
 BufferedReader reader = new BufferedReader(new InputStreamReader(process.getErrorStream()));
 while (true) {
 String line = reader.readLine();
 if (line != null) {
 Log.e("process", line);
 appendLog(line);
 final int incr = durationToprogtess(line);
 new Handler(Looper.getMainLooper()).post(new Runnable() {
 public void run() {
 if (receiver != null) {
 receiver.onVideoProgressUpdate(incr);
 }
 }
 });
 mBuilder.setProgress(100, ((int) ((75.0f * ((float) incr)) / 100.0f)) + 25, false);
 mNotifyManager.notify(1001, mBuilder.build());
 }else {
 break;
 }
 }
 }
 } catch (IOException e) {
 e.printStackTrace();
 } finally {
 Util.destroyProcess(process);
 }
 mBuilder.setContentText("Video created :" + FileUtils.getDuration(System.currentTimeMillis() - startTime)).setProgress(0, 0, false);
 mNotifyManager.notify(1001, mBuilder.build());
 try {
 long fileSize = new File(videoPath).length();
 String artist = getResources().getString(R.string.artist_name);
 ContentValues values = new ContentValues();
 values.put("_data", videoPath);
 values.put("_size", Long.valueOf(fileSize));
 values.put("mime_type", "video/mp4");
 values.put("artist", artist);
 values.put("duration", Float.valueOf(toatalSecond * 1000.0f));
 getContentResolver().insert(Media.getContentUriForPath(videoPath), values);
 } catch (Exception e2) {
 e2.printStackTrace();
 }
 try {
 sendBroadcast(new Intent("android.intent.action.MEDIA_SCANNER_SCAN_FILE", Uri.fromFile(new File(videoPath))));
 } catch (Exception e3) {
 e3.printStackTrace();
 }

 buildNotification(videoPath);
 final String str = videoPath;
 new Handler(Looper.getMainLooper()).post(new Runnable() {
 public void run() {
 if (receiver != null) {
 receiver.onVideoProgressUpdate(100);
 receiver.onProgressFinish(str);
 }
 }
 });
 FileUtils.deleteTempDir();
 stopSelf();
 }


I have tried checking the directory in storage and check mkdir is working or not but this function purely works for creating video from a collection of images, themes, and audio. as per android


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