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• Concat 3 videos, setting the output frame-rate based on one of the three videos

  14 février 2023, par 3EK

  I have 3 videos that I would like to concat. An intro, a main video and an outro. All mp4s, all the same spec except the main video is a different frame rate to the other two video assets.

  


  I am trying to use ffprobe to find out the frame rate of the main video and then apply that frame rate to the output file.

  


  This is what I have so far, but it is not working.

  


  #!/bin/bash

mezzfile=mezzfile.mp4
tailtime=20
duration=$(ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 $mezzfile)
framerate=$(ffprobe -v 0 -of compact=p=0 -select_streams 0 \
-show_entries stream=r_frame_rate '$mezzfile')

ffmpeg -hide_banner -y \
  -i sting.mp4 \
  -i $mezzfile \
  -i endboard.mp4 \
  -filter_complex \
    "[0:v]setpts=PTS-STARTPTS,fps=${framerate}[v_intro]; \
     [0:a]asetpts=PTS-STARTPTS,fps=${framerate}[a_intro]; \
     [1:v]setpts=PTS-STARTPTS,split[v_main1][v_main2]; \
     [1:a]asetpts=PTS-STARTPTS[a_main]; \
     [2:v]setpts=PTS-STARTPTS,fps=${framerate}[v_endboard]; \
     [v_main1]select='gt(t,$duration-$tailtime)',scale=w=iw/2:h=ih/2,setpts=PTS-STARTPTS[v_tail]; \
     [v_endboard][v_tail]overlay[v_pip]; \
     [v_main2]select='lte(t,$duration-$tailtime)',setpts=PTS-STARTPTS[v_mid]; \
     [v_intro][v_mid][v_pip]concat=n=3:v=1:a=0[v_out]; \
     [a_intro][a_main]concat=n=2:v=0:a=1[a_out]" \
  -map "[v_out]" \
  -map "[a_out]" \
  output.mp4


  


  Any help would be greatly appreciated !
Cheers !

  


  I have tried the code above. Hoping someone can help me figure out what I'm doing wrong ?

  


• Ndk : Button event error Fatal 11 SIGSEGV when video streaming

  24 avril 2015, par user3773632

  I’m using ffmpeg in ndk, make video streaming service.

  my problem is that Video streaming when the button is pressed, an fatal 11 SIGSEGV error occurs.

  this my source

  protected void onCreate(Bundle savedInstanceState) {
  
      super.onCreate(savedInstanceState);
  
      setContentView(R.layout.fragment_main);
  
  
  
      Log.v("LOG", "CREATE");
  
  
  
      mUHSurfaceView = (UHSurfaceView) findViewById(R.id.uhsurfaceview); 
  
      bCamera = (Button)findViewById(R.id.camera);
  
  
  
      bCamera.setOnClickListener(new OnClickListener() {
  
          @Override
  
          public void onClick(View v) {
  
              // TODO Auto-generated method stub
  
              Log.v("CameraButton", "CameraButton");
  
          }
  
      });

  In ndk using ffmpeg h264 decoding and rgb24 through opengl(GLSurfaceView) screen output.
  I don’t know why occur this error i can’t solve error
  please help me !

  my device : Samsung galaxy s4 mini
  android : 4.2.2

  Thanks.

• Revision 35a83677a5 : Moving itxm_add pointer from MACROBLOCKD to MACROBLOCK. The final goal is event

  21 mai 2014, par Dmitry Kovalev

  Changed Paths :
   Modify /vp9/common/vp9_blockd.h

  
   Modify /vp9/decoder/vp9_decodeframe.c

  
   Modify /vp9/encoder/vp9_block.h

  
   Modify /vp9/encoder/vp9_encodeframe.c

  
   Modify /vp9/encoder/vp9_encodemb.c

  
   Modify /vp9/encoder/vp9_encoder.c

  
  
  Moving itxm_add pointer from MACROBLOCKD to MACROBLOCK.

  The final goal is eventually to get rid of both itxm_add and fwd_txm4x4.
  This patch does it in the decoder.

  Change-Id : Ibb3db57efbcbb1ac387c6742538a9fcf2c6f24a5