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• How to optimize this ffmpeg script ?

  5 juillet 2015, par user3673952

  I’m trying to run a script to add a intro + watermark a lot of videos, the thing is i only managed to do this with 2 scripts :

  ffmpeg -i "%a" -i logo.png -filter_complex "scale=1280x738,setsar=1:1,overlay=main_w-overlay_w-10:main_h-overlay_h-10" path\_%a 

  &

  ffmpeg -i path\intro.mp4 -i path\_%a -filter_complex "[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" -bsf:a aac_adtstoasc path\%a

  So i have to encode two videos (the scaled & watermarked one and the final one) every time. Can i do this with only one command ?

  Also, is there any way i can further optimize the command so i can do this encoding faster ?

• Android - How to direct the audio data from MediaRecorder as the input of ffmpeg command via Pipe ?

  3 juin 2013, par Abner311

  I tried to publish audio stream to RTMP server via FFmpeg executable binary.
  I have referred to Android AudioRecord to FFMPEG encode native AAC to create a pipe at Android side and assign the reader part of pipe to ffmpeg command.

   @Override
  
   protected void onCreate(Bundle savedInstanceState) {
  
  
  
      super.onCreate(savedInstanceState);
  
      setContentView(com.example.processtest.R.layout.activity_main);
  
      mediaRecorder = new MediaRecorder();
  
      mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
  
      mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
  
      mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
  
      mediaRecorder.setAudioSamplingRate(44100);
  
      mediaRecorder.setAudioEncodingBitRate(64);
  
  
  
      final ParcelFileDescriptor[] pipe = getPipe();
  
      mediaRecorder.setOutputFile(pipe[1].getFileDescriptor());
  
      try {
  
          mediaRecorder.prepare();
  
      } catch (IllegalStateException e1) {
  
          e1.printStackTrace();
  
      } catch (IOException e1) {
  
          e1.printStackTrace();
  
      }
  
      mediaRecorder.start();
  
  
  
      TextView txt = (TextView)this.findViewById(com.example.processtest.R.id.output);
  
      try {    
  
          p = Runtime.getRuntime().exec("/data/data/com.example.processtest/bin/ffmpeg -re -i pipe:"+ pipe[0].getFd() +" -c copy -f flv rtmp://192.168.2.224:1935/myapp/mystream");   
  
      } catch (IOException e) {
  
          e.printStackTrace();
  
      } 
  
  }
  
  
  
  ParcelFileDescriptor[] getPipe()
  
  {
  
      final String FUNCTION = "getPipeFD";
  
      //FileDescriptor outputPipe = null;
  
      ParcelFileDescriptor[] pipe = null;
  
      try
  
      {
  
          pipe = ParcelFileDescriptor.createPipe();
  
      }
  
      catch(Exception e)
  
      {
  
          Log.e("ProcessTest", FUNCTION + " : " + e.getMessage());
  
      }
  
  
  
      return pipe;
  
  }

  However, I got the error msg like "pipe:55 : Bad file number" :

      $/data/data/com.example.processtest/bin/ffmpeg -re -i pipe:55 -c copy -f flv  rtmp://192.168.2.224:1935/myapp/mystream
  
  
  
     E/ProcessTest(19150):   libavutil      51. 65.100 / 51. 65.100<br />
  
     E/ProcessTest(19150):   libavcodec     54. 41.100 / 54. 41.100<br />
  
     E/ProcessTest(19150):   libavformat    54. 17.100 / 54. 17.100<br />
  
     E/ProcessTest(19150):   libavdevice    54.  1.100 / 54.  1.100<br />
  
     E/ProcessTest(19150):   libavfilter     3.  2.100 /  3.  2.100<br />
  
     E/ProcessTest(19150):   libswscale      2.  1.100 /  2.  1.100<br />
  
     E/ProcessTest(19150):   libswresample   0. 15.100 /  0. 15.100<br />
  
     E/ProcessTest(19150): pipe:55: Bad file number<br />

  Please help me figure out how to assign right pipe fd to ffmpeg command-line process.

• Encoding H.264 video using FFmpeg C API

  18 juillet 2014, par GummiB

  I’m trying to encode a H.264 video with the FFMPEG C API.
  I have successfully compiled and executed the decoding/encoding example provided by FFMPEG.

  The problem I’m facing is that the .mpg file (encoded with AV_CODEC_ID_MPEG1VIDEO) the example creates works. Windows creates a thumbnail and everything. On the other hand the .h264 (encoded with AV_CODEC_ID_H264) file does not. When I try to play the file in VLC the play/pause button just flickers, no thumbnail in windows, no nothing.

  During encoding libx264 reports the following :

  [libx264 @ 004b81a0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 004b81a0] profile High, level 1.3
  
  [libx264 @ 004b81a0] frame I:3     Avg QP:26.79  size:  2116
  
  [libx264 @ 004b81a0] frame P:12    Avg QP:26.60  size:   789
  
  [libx264 @ 004b81a0] frame B:10    Avg QP:31.39  size:   499
  
  [libx264 @ 004b81a0] consecutive B-frames: 20.0% 80.0%
  
  [libx264 @ 004b81a0] mb I  I16..4: 78.3% 11.6% 10.1%
  
  [libx264 @ 004b81a0] mb P  I16..4: 77.4%  0.6%  0.1%  P16..4: 20.3%  0.7%  0.9%  0.0%  0.0%    skip: 0.0%
  
  [libx264 @ 004b81a0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  9.4%  0.2%  0.0%  direct:11.0%  skip:79.4%  L0:25.4% L1:35.4% BI:39.2%
  
  [libx264 @ 004b81a0] final ratefactor: 17.03
  
  [libx264 @ 004b81a0] 8x8 transform intra:3.4% inter:31.3%
  
  [libx264 @ 004b81a0] direct mvs  spatial:0.0% temporal:100.0%
  
  [libx264 @ 004b81a0] coded y,uvDC,uvAC intra: 4.4% 35.8% 1.6% inter: 1.3% 34.5% 9.5%
  
  [libx264 @ 004b81a0] i16 v,h,dc,p:  0%  0%  0% 100%
  
  [libx264 @ 004b81a0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 20% 17% 49%  0%  0%  0%  1%  6%
  
  [libx264 @ 004b81a0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14%  7% 18% 45%  2%  7%  2%  3%  2%
  
  [libx264 @ 004b81a0] i8c dc,h,v,p:  2%  6%  4% 88%
  
  [libx264 @ 004b81a0] Weighted P-Frames: Y:0.0% UV:0.0%
  
  [libx264 @ 004b81a0] ref P L0: 95.6%  1.6%  2.2%  0.5%  0.2%
  
  [libx264 @ 004b81a0] ref B L0: 67.5% 28.5%  3.2%  0.8%
  
  [libx264 @ 004b81a0] kb/s:166.45

  "ffprobe.exe test.h264 -show_streams" returns

  [STREAM]
  
  index=0
  
  codec_name=h264
  
  codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
  
  profile=High
  
  codec_type=video
  
  codec_time_base=1/50
  
  codec_tag_string=[0][0][0][0]
  
  codec_tag=0x0000
  
  width=352
  
  height=288
  
  has_b_frames=1
  
  sample_aspect_ratio=0:1
  
  display_aspect_ratio=0:1
  
  pix_fmt=yuv420p
  
  level=13
  
  timecode=N/A
  
  id=N/A
  
  r_frame_rate=50/2
  
  avg_frame_rate=25/1
  
  time_base=1/1200000
  
  start_pts=N/A
  
  start_time=N/A
  
  duration_ts=N/A
  
  duration=N/A
  
  bit_rate=N/A
  
  nb_frames=N/A
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=0
  
  DISPOSITION:dub=0
  
  DISPOSITION:original=0
  
  DISPOSITION:comment=0
  
  DISPOSITION:lyrics=0
  
  DISPOSITION:karaoke=0
  
  DISPOSITION:forced=0
  
  DISPOSITION:hearing_impaired=0
  
  DISPOSITION:visual_impaired=0
  
  DISPOSITION:clean_effects=0
  
  DISPOSITION:attached_pic=0
  
  [/STREAM]

  There you can see :

  start_time=N/A
  
  duration_ts=N/A
  
  duration=N/A

  I have tried countless changes to the AVCodecContext and multitude of parameters options to av_opt_set function. Still no luck getting a working H.264 video. I have even tried different builds of FFmpeg. No luck.

  I’m using the "FFmpeg git-0fb64da 32-bit Dev" build from Zeranoe and MinGw 4.7.2