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• How do I convert a .wav file to 16bit 44.1kz using ffmpeg or other utility [closed]

  26 mai 2023, par Seth Edwards

  A preface :
I am building an environment for a my own streaming box. Since building the UI. I turned to the now obsolete MSNTV box to find its UI sound effects.

  


  I found the dump on GitHub. I downloaded and located where the sounds where located.

  


  I listened to them one by one. I noticed that they are wave files. But they sound like they were low quality and may have been compressed before being turned into a wave file.

  


  I was using the Apple Files app on an iPhone 6s running iOS 15.7.1.

  


  They play back fine.

  


  I try importing them into GarageBand for iOS and it gives me an error saying that it only allows 16bit 44.1khz files. This confirmed my suspicion of it being low quality.

  


  I then tried playing them on a Dell Chromebook 3100 running ChromeOS. Chrome’s player would also not play the files.

  


  I need to find out how to convert them to 16bit 44.1khz wave files.

  


  My guess is that since the MSNTV had a small amount of storage space that they compressed the audio.

  


  I tried converting the files to mp3. And they are Noticeably worse.

  


  Does anyone know how to convert these files so they can be played back normally.

  


  In the end I plan to use these files and play them using the pygame library.

  


  I have tried changing the metadata

  


  Converting to mp3

  


• How to add a scrolling text of the audio file song name on a sepecific part of a video and stream it to youtube using ffmpeg

  5 novembre 2022, par Youssef Lasheen

  I know this is s very long and specific question but it can be broken down to these points :

  


  

  • How to add a text of song name on video

  


  • How to scroll in a specific area not from the beginning of the video to the end

  


  • How to stream a looping video and loop through multiple audio files to youtube/twitch.

  


  


  I kinda got the third point but i think its not an elegant solution

  


  ffmpeg -re -stream_loop -1 -i back.gif -safe 0 -i mylist.txt -c copy -map 0:v:0 -map 1:a:0 -c:v libx264 -preset veryfast -b:v 3000k -maxrate 3000k \ -bufsize 6000k -pix_fmt yuv420p -g 50 -c:a aac -b:a 160k -ac 2 \ -ar 44100  -f flv rtmp://live.twitch.tv/app/$key

  


  I also found this script that adds a scrolling image (input.jpg) to specific aree of a video but i coudlnt integrate it with the script above

  


  ffmpeg -y -ignore_loop 0 -r 25 -i back.gif -loop 1 -r 25 -i input.jpg -filter_complex "[0:v]crop=270:257:360:55[c0];[c0][1:v]overlay=y='257-t*257*0.04':eof_action=endall[fg];[0:v][fg]overlay=x=360:y=55:eof_action=endall" -t 50 output.mp4

  


• Catch "Unfortunately 'app' has stopped working" Error

  2 juillet 2015, par cadesalaberry

  I am using a very unstable library on Android that crashes sporadically. I start it using the startActivity() in my code.

  The unstable part of the code is doing a lot of video processing and uploading the result to a server. I do not really mind if the activity crashes, but I need to signal the server that it did.

  The crash comes from a memory leak (no time to solve it yet). Is there a way I can catch the error a display a more friendly/funny message instead ?

  try {
  
      context.startActivity(intent);
  
  } catch (ApplicationCrashedException e) {
  
      server.notifyServerOfCrash();
  
      toast("I really disliked your face...");
  
  }

  Edit : Here is the Error :

  java.lang.OutOfMemoryError
  
    at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
  
    at java.nio.MemoryBlock.allocate(MemoryBlock.java:125)
  
    at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:72)
  
    at io.cine.android.streaming.FFmpegMuxer.writeSampleData(FFmpegMuxer.java:151)
  
    at io.cine.android.streaming.AndroidEncoder.drainEncoder(AndroidEncoder.java:128)
  
    at io.cine.android.streaming.TextureMovieEncoder.handleFrameAvailable(TextureMovieEncoder.java:264)
  
    at io.cine.android.streaming.TextureMovieEncoder$EncoderHandler.handleMessage(TextureMovieEncoder.java:409)
  
    at android.os.Handler.dispatchMessage(Handler.java:102)
  
    at android.os.Looper.loop(Looper.java:136)
  
    at io.cine.android.streaming.TextureMovieEncoder.run(TextureMovieEncoder.java:219)
  
    at java.lang.Thread.run(Thread.java:841)

  For some reason once the BroadcastActivity runs out of memory, the Activity gets killed and comes back to the previous one. It then displays the ’app’ has stopped working Dialog. If I press OK, it kills the entire application and comes back to the home screen.

  Ideally I would just have it come back to the previous activity notifying the server silently. (Not killing the application)