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• Android Create MP4 with bitmap series and mp3 by FFmpeg (i need minimal ffmpeg config for build)

  29 septembre 2017, par grizzly

  i’m building ffmpeg for android. my target is only create mp4 video with series of bitmap image and merge mp3 audio. i want use ffmpeg only only for this target. So i need optimized config for this target. i try find in google and find not bad config list. but i need full optimize config for reduce size of ffmpeg in android app. can you suggest me best config for this target ?

  i find this :

  Minimal configuration for mp4 files

  how do i modify this ffmpeg build script for minimal binary size output

  but is not complete optimized.

  please suggest me full optimize config for my target. thanks

• FFMpeg, rtsp cameras and series of bad framses

  21 avril 2022, par Denis Gottardello

  I have a problem with ffmpeg and rtsp cameras.
As you can see in the screenshot below

  


  

  


  sometimes a serie of damaged frames come.
It is not a problem related to camera. The date and time is unreadable and the problem happens with different vendors of camera, with differen pcs and in different places.With the official software the live is perfect.
I'm trying with the lates ffmpeg source (5.0.1) in a Debian 11 machine.
I'm particolar intertested in this problem because I have written a software based on ffpmeg library and I have the same problem (using ffmpeg as library), in bouth Windows and Linux.

  


  This is the command line to record

  


  


  


  ./ffmpeg -i rtsp://192.168.1.11:554/onvif1  a.avi

  


  


  



  What can I do to resolve ?

  


• FFMPEG Stream series of pictures over network

  11 septembre 2015, par Commodore63

  I would like to generate video frames on one computer and stream them to another computer to be manipulated and displayed. I want to do this programatically, because the source images are generated from a 3rd party c++ library and on the receiving end I want to manipulate the images before displaying them. I have been pulling my hair out trying FFMPEG. I got the encoding example to work, but am not sure what to do after that. I have just about googled everything i could think of but cannot figure out which FFMPEG library/function to call once I have a stuffed AVPacket. It seems that I need to use either the AVIO or AVFormat or the muxer but it is not clear how to initialize and get them working. I would appreciate any help you could offer.

  To provide some context I have the example ’decoding_encoding.c’ which is provided with ffmpeg working. Here is the spot that I am struggling with :

          /* encode the image */
  
          ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
  
          if (ret < 0) {
  
              fprintf(stderr, "Error encoding frame\n");
  
              exit(1);
  
          }
  
  
  
          if (got_output) {
  
              printf("Write frame %3d (size=%5d)\n", i, pkt.size);
  
              fwrite(pkt.data, 1, pkt.size, f);
  
  
  
              //
  
              // instead of writing to a file, i want to stream to a network
  
              // What do I need to do with pkt to do that?
  
              //
  
              av_free_packet(&pkt);
  
          }

  Most documentation (and the Dranger tutorial) focus on reading and writing files. I do not need to use a file. I want to stream video over a network. It seems like I need AVFormat and AVio but I jsut can’t figure out how they fit together.