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• System.AccessViolationException on avcodec_open2 using FFMpeg.AutoGen

  5 décembre 2024, par forlayo

  I am using FFMpeg.AutoGen (v6.0.0.2) with hwencode support for Nvidia cards, and in few devices (for example on NVIDIA GeForce MX350) when I am doing fffmpeg.avcodec_open2 I got the following ffmpeg message in logs :

  


  [h264_nvenc @ 000001f473fcc480] OpenEncodeSessionEx failed: unsupported device (2): (no details)



  


  And then it crashes with the following crash :

  


  Fatal error. System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.&#xA;   at FFmpeg.AutoGen.DynamicallyLoadedBindings&#x2B;&lt;>c.<initialize>b__2_494(FFmpeg.AutoGen.AVCodecContext*, FFmpeg.AutoGen.AVCodec*, FFmpeg.AutoGen.AVDictionary**)&#xA;   at FFmpeg.AutoGen.ffmpeg.avcodec_open2(FFmpeg.AutoGen.AVCodecContext*, FFmpeg.AutoGen.AVCodec*, FFmpeg.AutoGen.AVDictionary**)&#xA;   at GraphicsCheck.FfmpegChecker.StartEncoder(Omni.Platforms.Windows.Services.AV.CodecInfo, Int32, Int32, Int32)&#xA;   at GraphicsCheck.FfmpegChecker.CheckConfig(CodecConfig)&#xA;   at Program.<main>$(System.String[])&#xA;</main></initialize>

  


  I created a sample app to demo this issue. And following the path of the calls..

  


  

  1. That happens at nvenc_open_session and is called here

  


  2. That would cause going to fail2 routine, which is this one :

  


  


  fail2:
    CHECK_CU(dl_fn->cuda_dl->cuCtxDestroy(ctx->cu_context_internal));
    ctx->cu_context_internal = NULL;


  


  

  3. ctx->cu_context_internal comes from (in same method) then I suppose it was created properly (as otherwise wouldn't continue).

  


  


      ret = CHECK_CU(dl_fn->cuda_dl->cuCtxCreate(&ctx->cu_context_internal, 0, cu_device));
    if (ret < 0)
        goto fail;


  


  

  4. ctx in that method is the priv_data of AVCodecContext as we can see here :

  


  


  static av_cold int nvenc_check_device(AVCodecContext *avctx, int idx)
{
    NvencContext *ctx = avctx->priv_data;


  


  

  5. Also the act of printing the error message, on nvenc_print_error, is interacting with context.

  


  


  static int nvenc_print_error(AVCodecContext *avctx, NVENCSTATUS err,
                             const char *error_string)
{
    const char *desc;
    const char *details = "(no details)";
    int ret = nvenc_map_error(err, &desc);

#ifdef NVENC_HAVE_GETLASTERRORSTRING
    NvencContext *ctx = avctx->priv_data;
    NV_ENCODE_API_FUNCTION_LIST *p_nvenc = &ctx->nvenc_dload_funcs.nvenc_funcs;

    if (p_nvenc && ctx->nvencoder)
        details = p_nvenc->nvEncGetLastErrorString(ctx->nvencoder);
#endif

    av_log(avctx, AV_LOG_ERROR, "%s: %s (%d): %s\n", error_string, desc, err, details);

    return ret;
}


  


  


  6. av_log is executed as we can see the error message on logs then the other lines shouldn't be a problem.

     


  


  7. Seeing the other calls, when nvenc_check_device fails the error is going up to nvenc_check_device -> nvenc_setup_device but we aren't seeing more logs then the issue may be on nvenc_check_device on fail2 routine or on nvenc_print_error

     


  


  


  Any thoughts ?

  


• How can upload audio on dropbox after converted it from the video format using ffmpeg in nodejs and angular

  21 septembre 2021, par Amir Shahzad

  nodejs server side code

  


  This is my nodejs server side where i want to convert the video into the audio format and then want to upload the converted audio on the dropbox is there any way to do that ??

  


  const express = require('express'),
path = require('path'),
cors = require('cors'),
ffmpeg = require('fluent-ffmpeg'),
fs = require("fs"),
access_token = "My-Access-Token";

ffmpeg.setFfmpegPath('/usr/bin/ffmpeg');

const app = express();
app.use(cors());
app.use(express.json());
app.use(express.urlencoded({
  extended: false
}));


app.post('/api/upload', upload.single('mp4'), function (req, res) {
  if (!req.file) {
    console.log("No file is available!");
    return res.send({
     success: false
  });

  } else {
   function convert(input, output, callback) {
      ffmpeg(input)
          .output(output)
          .on('end', function() {                    
           console.log('conversion ended');
            callback(null);
          }).on('error', function(err){
           console.log('error: ', err);
            callback(err);
          }).run();
    }
     const filepath = req.file.path;
     var content = fs.readFileSync(filepath);

 options = {
    method: "POST",
    url: 'https://content.dropboxapi.com/2/files/upload',
    headers: {
     "Content-Type": "text/plain; charset=dropbox-cors-hack" ,
     "Authorization": "Bearer " + access_token,
      "Dropbox-API-Arg": "{\"path\": \"/youtube- 
       radio/"+req.file.originalname+"\",\"mode\": \"overwrite\",\"autorename\": 
       true,\"mute\": false}",
    },
     body:content
};
convert(filepath,  options+'.mp3', function(err,res, body){
   if(!err) {
    console.log('File Name is',req.file.originalname);
    console.log('File Path Is = ',req.file.path)
    console.log('conversion complete');   
    console.log('ERR', err);
   }
});
console.log('File is available!');
return res.send({
  success: true
})
}
 });


  const PORT = process.env.PORT || 8080;
  const server = app.listen(PORT, () => {
  console.log('Connected to port ' + PORT)
  })


  


  i have read many documentations of dropbox and ffmpeg and angular file upload but i could not understand Please anyone can resolve my code Thanks in advance

  


  This is my typescript file

  


  import { Component, OnInit } from '@angular/core';
import { FileUploader } from 'ng2-file-upload';
import { ToastrService } from 'ngx-toastr';
import { Track } from 'ngx-audio-player'; 
import { PlayerServiceService } from './services/player-service.service';


const URL = 'http://localhost:8080/api/upload';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit{

public uploader: FileUploader = new FileUploader({
  url: URL,
  itemAlias: 'mp4'
});
 constructor(private toastr: ToastrService,
    private playerService: PlayerServiceService) { }

 ngOnInit(): void {
   this.uploader.onAfterAddingFile = (file) => {
     file.withCredentials = false;
 };
  this.uploader.onCompleteItem = (item: any, status: any) => {
    console.log('Uploaded File Details:', item);
     this.toastr.success('File successfully uploaded!');
  };

}
}


  


  This is html code

  


   <div class="container mt-5">&#xA;  <div class="file-upload">&#xA;     <input type="file" ng2fileselect="ng2fileselect" />&#xA;     <button type="button" class="btn btn-info">&#xA;      Upload&#xA;    </button>&#xA;  </div>&#xA;</div>&#xA;

  


• Problems with ffmpeg command line on android

  17 mai 2017, par user2193172

  I managed to compile the ffmpeg Static build. But when I am trying to call the ffmpeg command line I get a Java IOException : No such file or Directory.

  My code is as follows :

  public void merge_video(View view){
  
  
  
      if(ffmpeg_file.exists()){
  
            Log.d(null, "ffmpeg exists");
  
        }else{
  
            Log.d(null, "Could not locate ffmpeg in the folder");
  
        }
  
  
  
        File file1 = new File("/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_22.mp4");
  
        if(file1.exists()){
  
            Log.d(null,"File 1 exists");
  
        }
  
        File file2 = new File("/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_28.mp4");
  
        if(file2.exists()){
  
            Log.d(null,"File 2 exists");
  
        }
  
  
  
        String[] ffmpegCommand = new String[5];
  
        ffmpegCommand[0] = "/mnt/sdcard/com.ffmpeg_test/ffmpeg";
  
        ffmpegCommand[1] = "-i";
  
        ffmpegCommand[2] = "concat:/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_22.mp4|/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_28.mp4";
  
        ffmpegCommand[3] = "copy";
  
        ffmpegCommand[4] = "/mnt/sdcard/com.ffmpeg_test/output.mp4";  
  
  
  
        try {
  
            Process ffmpegProcess = new ProcessBuilder(ffmpegCommand).redirectErrorStream(true).start();
  
  
  
            String line;
  
            BufferedReader reader = new BufferedReader(new InputStreamReader(ffmpegProcess.getInputStream()));
  
            Log.d(null, "*******Starting FFMPEG");
  
  
  
            while((line = reader.readLine())!=null){
  
  
  
                Log.d(null, "***"+line+"***"); 
  
            }
  
            Log.d(null,"****ending FFMPEG****");
  
  
  
      } catch (IOException e) {
  
          e.printStackTrace();
  
      }
  
    }

  The LogCat print is as follows :

  03-27 20:41:10.522: W/System.err(24709): java.io.IOException: Error running exec(). Command: [/mnt/sdcard/com.ffmpeg_test/ffmpeg, -i, concat:/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_22.mp4|/mnt/sdcard/com.ffmpeg_test/VID_3_25_2013_12_28.mp4, copy, /mnt/sdcard/com.ffmpeg_test/output.mp4] Working Directory: null Environment: [ANDROID_SOCKET_zygote=13, TMPDIR=/data/local/tmp, ANDROID_BOOTLOGO=1, EXTERNAL_STORAGE=/mnt/sdcard, ANDROID_ASSETS=/system/app, PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin, ASEC_MOUNTPOINT=/mnt/asec, LOOP_MOUNTPOINT=/mnt/obb, BOOTCLASSPATH=/system/framework/core.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/android.policy.jar:/system/framework/services.jar:/system/framework/core-junit.jar, USBHOST_STORAGE=/mnt/sdcard/usbStorage, ANDROID_DATA=/data, LD_LIBRARY_PATH=/vendor/lib:/system/lib, ANDROID_ROOT=/system, ANDROID_PROPERTY_WORKSPACE=12,32768, EXTERNAL_STORAGE2=/mnt/sdcard/external_sd]
  
  03-27 20:41:10.522: W/System.err(24709):    at java.lang.ProcessManager.exec(ProcessManager.java:224)
  
  03-27 20:41:10.522: W/System.err(24709):    at java.lang.ProcessBuilder.start(ProcessBuilder.java:202)
  
  03-27 20:41:10.522: W/System.err(24709):    at com.example.ffmpeg_test.MainActivity.merge_video(MainActivity.java:106)
  
  03-27 20:41:10.522: W/System.err(24709):    at java.lang.reflect.Method.invokeNative(Native Method)
  
  03-27 20:41:10.522: W/System.err(24709):    at java.lang.reflect.Method.invoke(Method.java:507)
  
  03-27 20:41:10.527: W/System.err(24709):    at android.view.View$1.onClick(View.java:2149)
  
  03-27 20:41:10.527: W/System.err(24709):    at android.view.View.performClick(View.java:2538)
  
  03-27 20:41:10.527: W/System.err(24709):    at android.view.View$PerformClick.run(View.java:9152)
  
  03-27 20:41:10.527: W/System.err(24709):    at android.os.Handler.handleCallback(Handler.java:587)
  
  03-27 20:41:10.527: W/System.err(24709):    at android.os.Handler.dispatchMessage(Handler.java:92)
  
  03-27 20:41:10.527: W/System.err(24709):    at android.os.Looper.loop(Looper.java:123)
  
  03-27 20:41:10.527: W/System.err(24709):    at android.app.ActivityThread.main(ActivityThread.java:3691)
  
  03-27 20:41:10.527: W/System.err(24709):    at java.lang.reflect.Method.invokeNative(Native Method)
  
  03-27 20:41:10.527: W/System.err(24709):    at java.lang.reflect.Method.invoke(Method.java:507)
  
  03-27 20:41:10.532: W/System.err(24709):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847)
  
  03-27 20:41:10.532: W/System.err(24709):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605)
  
  03-27 20:41:10.537: W/System.err(24709):    at dalvik.system.NativeStart.main(Native Method)
  
  03-27 20:41:10.537: W/System.err(24709): Caused by: java.io.IOException: No such file or directory
  
  03-27 20:41:10.537: W/System.err(24709):    at java.lang.ProcessManager.exec(Native Method)
  
  03-27 20:41:10.537: W/System.err(24709):    at java.lang.ProcessManager.exec(ProcessManager.java:222)
  
  03-27 20:41:10.537: W/System.err(24709):    ... 16 more
  
  03-27 20:41:36.057: W/KeyCharacterMap(24709): No keyboard for id 0
  
  03-27 20:41:36.057: W/KeyCharacterMap(24709): Using default keymap: /system/usr/keychars/qwerty.kcm.bin