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Sur d’autres sites (6204)
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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


-
Extract music metadata (music title, album title, artist name...) using react-player
6 juin 2022, par PierogiI'm building a simple web app that plays music streams.

The constitution of the web app is

audio.m4a -> ffmpeg -> nginx + rtmp module -> frontend browser


In the frontend browser, use react-player.

The audio data is published as HLS audio data.

So, I want to extract the metadata(music title, album title, artist name ...) from the data and display it in the browser. However, I could not find the way to that.

Anyone who knows this ?

-
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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