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• ffmpeg fast seek large MP4 over HTTP

  28 juillet 2024, par Gmanicus

  I'm attempting to download snapshots from a video provided by the U.S House of Representatives :

  


  https://houseliveprod-f9h4cpb9dyb8gegg.a01.azurefd.net/east/2024-04-11T08-55-12_Download/video_3000000_1.mp4


  


  I am using fluent-ffmpeg in Node to execute this command :

  


  ffmpeg('https://houseliveprod-f9h4cpb9dyb8gegg.a01.azurefd.net/east/2024-04-11T08-55-12_Download/video_3000000_1.mp4')
  .inputOption(`-ss 03:33:33`)
  .outputOptions([
     '-vframes 1'
  ])
  .output('test.png')

// Effectively:
// ffmpeg -ss 03:33:33 -i  -y -vframes 1 test.png


  


  My intention is to fast-seek to the desired timestamp and take a snapshot over HTTP. However, when doing so, the performance is not great. A snapshot takes about 10s per 3hrs of video and seems to increase fairly linearly at that rate.

  


  However, when using ffmpeg on the same video locally, it's super fast ! Sub-500ms regardless of the desired timestamp.

  


  Is there some magic that could be done via ffmpeg options or perhaps some sort of technique with manual requests to get a snapshot at the desired segment of video more efficiently ?

  


• ffmpeg fast seek not working for MP4 over HTTP

  27 juillet 2024, par Gmanicus

  I'm attempting to download snapshots from a video provided by the U.S House of Representatives :

  


  https://houseliveprod-f9h4cpb9dyb8gegg.a01.azurefd.net/east/2024-04-11T08-55-12_Download/video_3000000_1.mp4


  


  I am using fluent-ffmpeg in Node to execute this command :

  


  ffmpeg('https://houseliveprod-f9h4cpb9dyb8gegg.a01.azurefd.net/east/2024-04-11T08-55-12_Download/video_3000000_1.mp4')
  .inputOption(`-ss 03:33:33`)
  .outputOptions([
     '-vframes 1'
  ])
  .output('test.png')

// Effectively:
// ffmpeg -ss 03:33:33 -i  -y -vframes 1 test.png


  


  My intention is to fast-seek to the desired timestamp and take a snapshot over HTTP. However, when doing so, the performance is not great. A snapshot takes about 10s per 3hrs of video and seems to increase fairly linearly at that rate.

  


  However, when using ffmpeg on the same video locally, it's super fast ! Sub-500ms regardless of the desired timestamp.

  


  Is there some magic that could be done via ffmpeg options or perhaps some sort of technique with manual requests to get a snapshot at the desired segment of video more efficiently ?

  


• ffmpeg command not working with white space of directory path in Android

  13 avril 2017, par Sakib Syed

  I am working with FFMPEG library in which I want to rotate video using this library which works fine if I am file path has no any white space. But in my case I have white space of video directory (you can see full path in String commandStr onPreExecute() method of asynctask) path then it is not working at all. I have also seen same question like this and some more but not get any idea how to resolved it properly. Below is my code of MainActivity.class

      public class MainActivity extends AppCompatActivity implements View.OnClickListener{
  
  
  
      String workFolder = null;
  
      String demoVideoFolder = null;
  
      String vkLogPath = null;
  
      private boolean commandValidationFailedFlag = false;
  
  
  
      private Button btnRun;
  
  
  
  
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          GeneralUtils.checkForPermissionsMAndAbove(MainActivity.this, true);
  
  
  
  
  
          setIds();
  
          setListner();
  
  
  
  
  
          demoVideoFolder = Environment.getExternalStorageDirectory().getAbsolutePath() + "/videokit/";
  
  
  
          Log.i(Prefs.TAG, getString(R.string.app_name) + " version: " + GeneralUtils.getVersionName(getApplicationContext()) );
  
          workFolder = getApplicationContext().getFilesDir().getAbsolutePath() + "/";
  
          vkLogPath = workFolder + "vk.log";
  
  
  
          GeneralUtils.copyLicenseFromAssetsToSDIfNeeded(this, workFolder);
  
          GeneralUtils.copyDemoVideoFromAssetsToSDIfNeeded(this, demoVideoFolder);
  
  
  
  
  
          int rc = GeneralUtils.isLicenseValid(getApplicationContext(), workFolder);
  
          Log.i(Prefs.TAG, "License check RC: " + rc);
  
      }
  
  
  
      private void setListner() {
  
          btnRun.setOnClickListener(this);
  
      }
  
  
  
      private void setIds() {
  
          try {
  
              btnRun =  (Button)findViewById(R.id.btnRun);
  
          } catch (Exception e) {
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      @Override
  
      public void onClick(View view) {
  
          switch (view.getId()){
  
              case R.id.btnRun:
  
  
  
                  Log.i(Prefs.TAG, "run clicked.");
  
                  if (GeneralUtils.checkIfFileExistAndNotEmpty(workFolder)) {
  
                      new TranscdingBackground(MainActivity.this).execute();
  
                  }
  
                  else {
  
                      Toast.makeText(getApplicationContext(), workFolder + " not found", Toast.LENGTH_LONG).show();
  
                  }
  
                  break;
  
          }
  
      }
  
  
  
      public class TranscdingBackground extends AsyncTask
  
      {
  
  
  
          ProgressDialog progressDialog;
  
          Activity _act;
  
          String commandStr;
  
  
  
          public TranscdingBackground (Activity act) {
  
              _act = act;
  
          }
  
  
  
  
  
  
  
          @Override
  
          protected void onPreExecute() {
  
  
  
  //            commandStr = "ffmpeg -y -i /storage/emulated/0/WhatsApp/Media/in.mp4 -vf rotate=270*(PI/180) /sdcard/videokit/out.mp4";
  
              commandStr = "ffmpeg -y -i /storage/emulated/0/WhatsApp/Media/WhatsApp Video/in.mp4 -vf rotate=270*(PI/180) /sdcard/videokit/out.mp4";
  
  
  
  
  
              progressDialog = new ProgressDialog(_act);
  
              progressDialog.setMessage("FFmpeg4Android Transcoding in progress...");
  
              progressDialog.show();
  
  
  
          }
  
  
  
          protected Integer doInBackground(String... paths) {
  
              Log.i(Prefs.TAG, "doInBackground started...");
  
  
  
              // delete previous log
  
              boolean isDeleted = GeneralUtils.deleteFileUtil(workFolder + "/vk.log");
  
              Log.i(Prefs.TAG, "vk deleted: " + isDeleted);
  
  
  
              PowerManager powerManager = (PowerManager)_act.getSystemService(Activity.POWER_SERVICE);
  
              PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
  
              Log.d(Prefs.TAG, "Acquire wake lock");
  
              wakeLock.acquire();
  
  
  
  
  
  
  
              LoadJNI vk = new LoadJNI();
  
              try {
  
  
  
                  vk.run(GeneralUtils.utilConvertToComplex(commandStr), workFolder, getApplicationContext());
  
  
  
                  // copying vk.log (internal native log) to the videokit folder
  
                  GeneralUtils.copyFileToFolder(vkLogPath, demoVideoFolder);
  
  
  
              } catch (CommandValidationException e) {
  
                  Log.e(Prefs.TAG, "vk run exeption.", e);
  
                  commandValidationFailedFlag = true;
  
  
  
              } catch (Throwable e) {
  
                  Log.e(Prefs.TAG, "vk run exeption.", e);
  
              }
  
              finally {
  
                  if (wakeLock.isHeld())
  
                      wakeLock.release();
  
                  else{
  
                      Log.i(Prefs.TAG, "Wake lock is already released, doing nothing");
  
                  }
  
              }
  
              Log.i(Prefs.TAG, "doInBackground finished");
  
              return Integer.valueOf(0);
  
          }
  
  
  
          protected void onProgressUpdate(Integer... progress) {
  
          }
  
  
  
          @Override
  
          protected void onCancelled() {
  
              Log.i(Prefs.TAG, "onCancelled");
  
              //progressDialog.dismiss();
  
              super.onCancelled();
  
          }
  
  
  
  
  
          @Override
  
          protected void onPostExecute(Integer result) {
  
              Log.i(Prefs.TAG, "onPostExecute");
  
              progressDialog.dismiss();
  
              super.onPostExecute(result);
  
  
  
              // finished Toast
  
              String rc = null;
  
              if (commandValidationFailedFlag) {
  
                  rc = "Command Vaidation Failed";
  
              }
  
              else {
  
                  rc = GeneralUtils.getReturnCodeFromLog(vkLogPath);
  
              }
  
              final String status = rc;
  
              MainActivity.this.runOnUiThread(new Runnable() {
  
                  public void run() {
  
                      Toast.makeText(MainActivity.this, status, Toast.LENGTH_LONG).show();
  
                      if (status.equals("Transcoding Status: Failed")) {
  
                          Toast.makeText(MainActivity.this, "Check: " + vkLogPath + " for more information.", Toast.LENGTH_LONG).show();
  
                      }
  
                  }
  
              });
  
          }
  
      }
  
  
  
  }

  Here onPreExecute() method I have given video file path.