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• Am I missing a timeout param in FFMPEG ?

  5 mai 2020, par Dave Stein

  I'm running an ffmpeg command like this :

  



  ffmpeg -loglevel quiet -report -timelimit 15 -timeout 10 -protocol_whitelist file,http,https,tcp,tls,crypto -i ${inputFile} -vframes 1 ${outputFile} -y

  



  This is running in an AWS Lambda function. My Lambda timeout is at 30 seconds. For some reason I am getting "Task timed out" messages still. I should note I log before and after the command, so I know it's timing out during this task.

  



  Update

  



  In terms of the entire lambda execution I do the following :

  



  


  • Invoke a lambda to get an access token. This lambda makes on API request. It has a timeout of 5 seconds. The max time was 660MS for one request.

  


  • Make another API request to verify data. The max time was 1.6 seconds.

  


  • Run FFMPEG

  


  



  timelimit is supposed to Exit after ffmpeg has been running for duration seconds in CPU user time.. Theoretically this shouldn't run more than 15 seconds then, plus maybe 2-3 more before the other requests.

  



  timeout is probably superfluous here. There were a lot of definitions for it in the manual, but I think that was mainly waiting on input ? Either way, I'd think timelimit would cover my bases.

  



  Update 2

  



  I checked my debug log and saw this :

  



  Reading option '-timelimit' ... matched as option 'timelimit' (set max runtime in seconds) with argument '15'.
Reading option '-timeout' ... matched as AVOption 'timeout' with argument '10'.


  



  Seems both options are supported by my build

  



  Update 2

  



  I have updated my code with a lot of logs. I definitively see the FFMPEG command as the last thing that executes, before stalling out for the 30 second timeout

  



  Update 3
I can reproduce the behavior by pointing at a track instead of full manifest. I have set the command to this :

  



  ffmpeg -loglevel debug -timelimit 5 -timeout 5  -i 'https://streamprod-eastus-streamprodeastus-usea.streaming.media.azure.net/0c495135-95fa-48ec-a258-4ba40262e1be/23ab167b-9fec-439e-b447-d355ff5705df.ism/QualityLevels(200000)/Manifest(video,format=m3u8-aapl)' -vframes 1 temp.jpg -y

  



  A few things here :

  



  

  1. I typically point at the actual manifest (not the track), and things usually run much faster

  


  2. I have lowered the timelimit and timeout to 5. Despite this, when i run a timer, the command runs for 15 seconds every time. It outputs a bunch of errors, likely due to this being track rather than full manifest, and then spits out the desired image.

  


  



  The full output is at https://gist.github.com/DaveStein/b3803f925d64dd96cd45ae9db5e5a4d0

  


• Is ffmpeg able to read ArrayBuffer input from stream

  7 juillet 2017, par jAndy

  I want to accomplish the following tasks :

  • Record Video+Audio from any HTML5 (MediaStream) capable browser
  • Send that data via WebSocket as Blob / ArrayBuffer chunks to a server
  • Broadcast that input stream-data to multiple clients

  As it turns out, this brought me into a world of pain. The first task is fairly simple using the HTML5 MediaStream objects alongside WebSockets.

  // ... for simplicity...
  
  navigator.mediaDevices.getUserMedia({ audio: true, video: true }).then(stream => {
  
      let mediaRecorder = new MediaRecorder( stream );
  
      // ...
  
      mediaRecorder.ondataavailable = e => {
  
          webSocket.send( 'newVideoData', e.data ); // configured for binary data
  
      };
  
  });

  Now, I want to receive those data fragments and stream those via nginx vod module, because I guess I want the output stream in HLS or DASH.
  I could write a little nodejs script as backend, which just receives the binary chunks and write them to a file or stream, and just reference it so nginx vod module could possibly read it and create the m3u8 manifest on the fly ?

  I am wondering now,

  • if ffmpeg is able to read that binary data directly (should be webm format), without a man-in-the-middle script, "somehow" ?
  • If not, do I have to write the data down into a file and pass that as input to ffmpeg or can I (should I) pipe the data to a self spawned ffmpeg instance ? (if so, how ?)
  • Do I actually need the nginx server (probably alongside rtmp module) to deliver the output stream as HLS or could I just use ffmpeg to also create a dynamic manifest ?
  • Is the nginx vod module capable of creating a dynamic hls/dash manifest or must the input data be complete beforehand ?
  • Ultimately, am I on the totally wrong track here ? :P

  Actually I just want to create a little video-live-chat demo, without any plugins or 3rd party encoding software, pure browser.

• How to watermark on video in android using ffmpeglibrary programmatically

  2 mai 2016, par Sakibmohammad Syed

  I want to watermark one video file using ffmpeg library. I have one png, one mp4 file in my Videokit folder and I want to watermark png image to video file and below is my code but I don’t know why I am unable to watermark on it. I have no more idea about implementation of ffmpeg library so please help me to solve such issue.
  Here is my MainActivity.

      public class MainActivity extends AppCompatActivity {
  
      @Override
  
      protected void onCreate(Bundle savedInstanceState) {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.activity_main);
  
  
  
          String workFolder = "/sdcard/Videokit/";
  
  
  
          GeneralUtils.deleteFileUtil(workFolder + "/vk.log");
  
  
  
          PowerManager powerManager = (PowerManager) this.getSystemService(Activity.POWER_SERVICE);
  
          PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "VK_LOCK");
  
          wakeLock.acquire();
  
          String commandStr = "ffmpeg -i /sdcard/Videokit/test.mp4 -i /sdcard/Videokit/test.png -filter_complex transpose=1,overlay=10:10 -y /sdcard/out.mp4";
  
  
  
          LoadJNI vk = new LoadJNI();
  
          try {
  
              vk.run(GeneralUtils.utilConvertToComplex(commandStr), workFolder, MainActivity.this);
  
              GeneralUtils.copyFileToFolder(commandStr, workFolder);
  
          } catch (CommandValidationException e) {
  
              Log.e("Prefs.TAG", "vk run exeption.", e);
  
          }
  
      }
  
  }

  Here is my Manifest.xml

          <?xml version="1.0" encoding="utf-8"?>
  
  <manifest package="com.example.android.compressexample">
  
  
  
      
  
      
  
      
  
      
  
      
  
  
  
      <application>
  
          <activity>
  
              
  
                  <action></action>
  
  
  
                  <category></category>
  
              
  
          </activity>
  
      </application>
  
  </manifest>