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• Pros and cons of installing ffmpeg into the caller's docker container vs. separate container [closed]

  8 mai 2022, par Irina Rapoport

  I have a dockerized app that spawns ffmpeg in a child process. It then communicates with it via standard input/output. The app runs under k3d.

  


  I could install ffmpeg in the parent's Dockerfile, by doing

  


  RUN apt-get install -y ffmpeg


  


  Or I can run it in a container of its own. What are the pros and cons of each approach ?

  


  Container start-up cost, while small, may become an issue, because it's started often.

  


• Android Samsung Galaxy S2 / S3 device bitmap rendering to ImageView issue

  18 décembre 2014, par Steve

  I am stuck in a very strange Bitmap rendering issue with Samsung Android devices. Let me discuss in brief what I have done.

  I am taking frame from a video and rendering it in a ImageView using ffmpeg. Following code gives me a bitmap object in return from JNI callback.

      img_convert_ctx = sws_getContext(pCodecCtx->width,
  
              pCodecCtx->height, pCodecCtx->pix_fmt, target_width,
  
          target_height, PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL,NULL);
  
  
  
      sws_scale(img_convert_ctx,(const uint8_t* const *) 
  
          pFrame->data,pFrame->linesize, 0, pCodecCtx->height,pFrameRGB->data, 
  
  pFrameRGB->linesize);

  Next, I’m just setting the Bitmap to ImageView. Now the issue is the Bitmap I get is rendering very well in maximum devices except Samsung S2/S3.

  A>Working well In :- Screen Shot 1

  1. Nexus 4
  2. HTC One / HTC One x
  3. LG Optimus
  4. Sony Experia
  5. Samsung Galaxy S Plus / Samsung Exhibit (Android 2.3)

  Issue With :-
  B>Samsung Galaxy S2 & S3 : The second screen shot.

  For Case B, A part of the video is rendering at the right side if you notice.

  I have tried saving the Bitmap I get from JNI as jpg in SD card and read that again to set the ImageView and it works. I Don’t understand what is going wrong with the raw Bitmap that I get from JNI callback, is it with Samsung S2 Hardware ? Please someone help me on this.

  

  

• Convert m4a to m4a with 3gp4 codec using ffmpeg, for compatibility with samsung audio recorder app [closed]

  17 août 2023, par Ash

  I need to convert my m4a audio files to m4a but will a 3gp4 codec (it seems samsung audio recording app only recognizes those with 3gp4 codec).

  


  How can i do that with ffmpeg or any other program ?

  


  I tried

  


  ffmpeg -i input.m4a -brand "3gp4" output.m4a


  


  This did change the major brand to 3gp4 but samsung recorder app still doesn't recognize the audio file.