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• how to use the command line of ffmpeg on android ?

  3 septembre 2013, par user1329261

  i want use the ffmpeg to crop video on android ,can any one show me some examples ?
  I had searched a lot on google,found some projects,but non of them could be use

• I wonder why logcat says "NO SUCH A FILE OR DIRECTORY(2)"

  22 septembre 2013, par autoexebat

  I wanna play audio on Android with ffmpeg.
  But when I run this project, error has occurred

  what should I do ?

  java SIDE

  import java.io.FileNotFoundException;
  
  import java.io.FileOutputStream;
  
  import java.io.IOException;
  
  import android.app.Activity;
  
  import android.media.AudioFormat;
  
  import android.media.AudioManager;
  
  import android.media.AudioTrack;
  
  import android.media.MediaPlayer;
  
  import android.os.Bundle;
  
  import android.os.SystemClock;
  
  
  
  public class FFmpegBasic extends Activity
  
  {
  
      private AudioTrack track;
  
      private FileOutputStream os;
  
      /** Called when the activity is first created. */
  
      @Override
  
      public void onCreate(Bundle savedInstanceState)
  
      {
  
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.main);
  
          createEngine();
  
  
  
          int bufSize = AudioTrack.getMinBufferSize(44100,
  
                                                    AudioFormat.CHANNEL_CONFIGURATION_STEREO, 
  
                                                    AudioFormat.ENCODING_PCM_16BIT);
  
  
  
  
  
          track = new AudioTrack(AudioManager.STREAM_MUSIC, 
  
                                 44100, 
  
                                 AudioFormat.CHANNEL_CONFIGURATION_STEREO, 
  
                                 AudioFormat.ENCODING_PCM_16BIT, 
  
                                 bufSize,
  
                                 AudioTrack.MODE_STREAM);
  
  
  
          byte[] bytes = new byte[bufSize];
  
  
  
          try {
  
              os = new FileOutputStream("/sdcard/a.out",false);
  
          } catch (FileNotFoundException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          }
  
  
  
          String result = "/mnt/sdcard/Wildlife.mp3";
  
          loadFile(result,bytes);
  
  
  
          try {
  
              os.close();
  
          } catch (IOException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
      void playSound(byte[] buf, int size) {  
  
          if(track.getPlayState()!=AudioTrack.PLAYSTATE_PLAYING)
  
              track.play();
  
          track.write(buf, 0, size);
  
  
  
          try {
  
              os.write(buf,0,size);
  
          } catch (IOException e) {
  
              // TODO Auto-generated catch block
  
              e.printStackTrace();
  
          }
  
      }
  
  
  
  
  
      private native void createEngine();
  
      private native void loadFile(String file, byte[] array);
  
  
  
      /** Load jni .so on initialization*/ 
  
      static {
  
           System.loadLibrary("avutil"); 
  
           System.loadLibrary("avcore"); 
  
           System.loadLibrary("avcodec");
  
           System.loadLibrary("avformat");
  
           System.loadLibrary("avdevice");
  
           System.loadLibrary("swscale");
  
           System.loadLibrary("avfilter");
  
           System.loadLibrary("ffmpeg");
  
           System.loadLibrary("basicplayer");
  
      }
  
  }

  ---

  c SIDE

  ---

  #include 
  
  #include 
  
  #include 
  
  #include <android></android>log.h>
  
  
  
  #include "libavcodec/avcodec.h"
  
  #include "libavformat/avformat.h"
  
  #include "avcodec.h"
  
  #include "avformat.h"
  
  
  
  
  
  
  
  
  
  void Java_net_jbong_FFmpegBasic_FFmpegBasic_createEngine(JNIEnv* env, jclass clazz)
  
      {
  
          //avcodec_init();
  
  
  
          av_register_all();
  
  
  
  
  
      }
  
  
  
  void Java_net_jbong_FFmpegBasic_FFmpegBasic_loadFile(JNIEnv* env, jobject obj, jstring file, jbyteArray array)
  
  {
  
  
  
      AVFormatContext *gFormatCtx = NULL;
  
      AVCodecContext *gAudioCodecCtx = NULL;
  
      AVCodec *gAudioCodec = NULL;
  
      int gAudioStreamIdx = -1;
  
      char *gAudioBuffer = NULL;
  
      int i, outsize = 0;
  
      AVPacket packet;
  
      const char *str; 
  
      str = (*env)->GetStringUTFChars(env, file, NULL); 
  
      jclass cls = (*env)->GetObjectClass(env, obj); 
  
      jmethodID play = (*env)->GetMethodID(env, cls, "playSound", "([BI)V"); 
  
  
  
      if (gFormatCtx != NULL)
  
          return -1;
  
      if (av_open_input_file(&amp;gFormatCtx,str,NULL,0,NULL)!=0)
  
          return -2;
  
      if (av_find_stream_info(gFormatCtx) &lt; 0)
  
          return -3;
  
  
  
      for(i=0; inb_streams; i++)
  
      {
  
          if(gFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
  
          {
  
              gAudioStreamIdx = i;
  
              break;
  
          }
  
      }
  
  
  
      if (gAudioStreamIdx == -1)
  
          return -4;
  
      gAudioCodecCtx = gFormatCtx->streams[gAudioStreamIdx]->codec;
  
      gAudioCodec = avcodec_find_decoder(gAudioCodecCtx->codec_id);
  
  
  
      if (gAudioCodec == NULL)
  
          return -5;
  
  
  
      if (avcodec_open(gAudioCodecCtx, gAudioCodec)&lt;0)
  
          return -6;
  
  
  
  
  
      gAudioBuffer = (char *)av_malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE *2); 
  
      int decode = 0;
  
  
  
      while (av_read_frame(gFormatCtx, &amp;packet) >= 0)
  
      {
  
       if (gFormatCtx-> streams[packet.stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
  
       {
  
           int data_size = AVCODEC_MAX_AUDIO_FRAME_SIZE * 8; 
  
           gAudioBuffer = (char *)av_malloc(data_size);
  
           int size=packet.size;
  
           while(size > 0)
  
           {
  
            int len = avcodec_decode_audio3(gAudioCodecCtx,
  
              (short *) gAudioBuffer, &amp;data_size, &amp;packet);
  
            if (data_size > 0)
  
            {
  
                      jbyte *bytes = (*env)->GetByteArrayElements(env, array, NULL);
  
                         memcpy(bytes + decode, (int16_t *)gAudioBuffer, size);
  
                         (*env)->ReleaseByteArrayElements(env, array, bytes, 0);
  
                         (*env)->CallVoidMethod(env, obj, play, array, data_size); 
  
                         decode += size;
  
                         size -= len;
  
  
  
            }
  
           }
  
       }
  
       av_free_packet(&amp;packet);
  
      }
  
  
  
      av_close_input_file(gFormatCtx);
  
      return 0;
  
  }

  Why my android logcat show me this message ?
  "error opening trace file : No such file or directory (2)"

• Crossdevice encoding static file to stream in browser using FFMPEG (segmented h264 ?)

  20 mars 2014, par Vprnl

  I'm building a mediacenter application in NodeJS which is going pretty ok.
  (you can check it out on Github : https://github.com/jansmolders86/mediacenterjs )

  I'm using FFMPEG to transcode local (static) movies to a stream which I then send to the browser.

  At first I used h264 with Flash which worked in browsers, but I really need it to work on Android an iOS (so no Flash) and preferably working on a Raspberry Pi.

  But getting it to play on all devices is driving me absolutely insane !

  I have all these bits of the puzzle I've gathered from countless hours reading articles, tutorials and stack overflow posts, which led me to the conclusion that I need to produce the following :

  • Use video codec H264 to transcode to MP4
  • Move the moovatom '-movflags' to make a MP4 streamable
  • Segment the stream so Apple can play the stream as well.

  But getting nowhere with this. Every time I produce a series of FFMPEG settings that either don't work, or work on some devices rather than all.

  Some of my failed attempt where :

  My flash attempt -> Main problem (not running in IOS) :

      '-y','-ss 0','-b 800k','-vcodec libx264','-acodec mp3'\ 
  
      '-ab 128','-ar 44100','-bufsize 62000', '-maxrate 620k'\
  
      metaDuration,tDuration,'-f flv

  my HLS attempt -> Main problem (not running in browser) :

          '-r 15','-b:v 128k','-c:v libx264','-x264opts level=41'\
  
          '-threads 4','-s 640x480','-map 0:v','-map 0:a:0','-c:a mp3'\
  
          '-b:a 160000','-ac 2','-f hls','-hls_time 10','-hls_list_size 6'\
  
          '-hls_wrap 18','-start_number 1'

  My MP4 attempt -> Main problem (duration is shortened and the later part of the video is speeding by)

         '-y','-ss 0','-b 800k','-vcodec libx264','-acodec mp3'\
  
         '-ab 128','-ar 44100','-bufsize 62000', '-maxrate 620k'\
  
         metaDuration,tDuration,'-f mp4','-movflags','frag_keyframe+empty_moov'

  Second MP4 attempt : -> Main problem (duration is shortened and the later part of the video is speeding by)

      '-y','-vcodec libx264','-pix_fmt yuv420p','-b 1200k','-flags +loop+mv4'\
  
      '-cmp 256','-partitions +parti4x4+parti8x8+partp4x4+partp8x8+partb8x8'\
  
      '-me_method hex','-subq 7','-trellis 1','-refs 5','-bf 3','-coder 1'\
  
      '-me_range 16','-g 150','-keyint_min 25','-sc_threshold 40'\
  
      '-i_qfactor 0.71','-acodec mp3','-qmin 10','-qdiff 4','-qmax 51'\
  
      '-ab 128k','-ar 44100','-threads 2','-f mp4','-movflags','frag_keyframe+empty_moov'])

  Here is an example of the FFMPEG log running with these settings :

          file conversion error ffmpeg version N-52458-gaa96439 Copyright (c) 2000-2013 the FFmpeg developers
  
            built on Apr 24 2013 22:19:32 with gcc 4.8.0 (GCC)
  
            configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --e
  
          nable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable
  
          -libgsm --enable-libilbc --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --ena
  
          ble-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwola
  
          me --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enabl
  
          e-libxvid --enable-zlib
  
            libavutil      52. 27.101 / 52. 27.101
  
            libavcodec     55.  6.100 / 55.  6.100
  
            libavformat    55.  3.100 / 55.  3.100
  
            libavdevice    55.  0.100 / 55.  0.100
  
            libavfilter     3. 60.101 /  3. 60.101
  
            libswscale      2.  2.100 /  2.  2.100
  
            libswresample   0. 17.102 /  0. 17.102
  
            libpostproc    52.  3.100 / 52.  3.100
  
          [avi @ 02427900] non-interleaved AVI
  
          Guessed Channel Layout for  Input Stream #0.1 : mono
  
          Input #0, avi, from 'C:/temp/the avengers.avi':
  
            Duration: 00:00:34.00, start: 0.000000, bitrate: 1433 kb/s
  
              Stream #0:0: Video: cinepak (cvid / 0x64697663), rgb24, 320x240, 15 tbr, 15 tbn, 15 tbc
  
              Stream #0:1: Audio: pcm_u8 ([1][0][0][0] / 0x0001), 22050 Hz, mono, u8, 176 kb/s
  
          Please use -b:a or -b:v, -b is ambiguous
  
          [libx264 @ 02527c60] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
          [libx264 @ 02527c60] profile High, level 2.0
  
          [libx264 @ 02527c60] 264 - core 130 r2274 c832fe9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2013 - http://www.videolan.org/x26
  
          4.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x133 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16
  
           chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=2 lookahead_threads=1 sliced_th
  
          reads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 we
  
          ightb=1 open_gop=0 weightp=2 keyint=150 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=120
  
          0 ratetol=1.0 qcomp=0.60 qpmin=10 qpmax=51 qpstep=4 ip_ratio=1.41 aq=1:1.00
  
          Output #0, mp4, to 'pipe:1':
  
            Metadata:
  
              encoder         : Lavf55.3.100
  
              Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 320x240, q=10-51, 1200 kb/s, 15360 tbn, 15 tbc
  
              Stream #0:1: Audio: mp3 (i[0][0][0] / 0x0069), 44100 Hz, mono, s16p, 128 kb/s
  
          Stream mapping:
  
            Stream #0:0 -> #0:0 (cinepak -> libx264)
  
            Stream #0:1 -> #0:1 (pcm_u8 -> libmp3lame)
  
          Press [q] to stop, [?] for help
  
          frame=  106 fps=0.0 q=10.0 size=       1kB time=00:00:06.94 bitrate=   1.4kbits/s
  
          frame=  150 fps=149 q=14.0 size=       1kB time=00:00:09.87 bitrate=   1.0kbits/s
  
          frame=  191 fps=126 q=16.0 size=       1kB time=00:00:12.61 bitrate=   0.8kbits/s
  
          frame=  244 fps=121 q=16.0 size=    2262kB time=00:00:16.14 bitrate=1147.6kbits/s
  
          frame=  303 fps=120 q=14.0 size=    2262kB time=00:00:20.08 bitrate= 922.2kbits/s
  
          frame=  354 fps=117 q=15.0 size=    3035kB time=00:00:23.48 bitrate=1058.6kbits/s
  
          frame=  402 fps=113 q=15.0 size=    3035kB time=00:00:26.67 bitrate= 932.1kbits/s
  
          frame=  459 fps=113 q=16.0 size=    4041kB time=00:00:30.43 bitrate=1087.7kbits/s
  
          frame=  510 fps=103 q=2686559.0 Lsize=    5755kB time=00:00:33.93 bitrate=1389.3kbits/s
  
  
  
          video:5211kB audio:531kB subtitle:0 global headers:0kB muxing overhead 0.235111%
  
          [libx264 @ 02527c60] frame I:6     Avg QP:10.55  size: 25921
  
          [libx264 @ 02527c60] frame P:245   Avg QP:12.15  size: 14543
  
          [libx264 @ 02527c60] frame B:259   Avg QP:15.55  size:  6242
  
          [libx264 @ 02527c60] consecutive B-frames:  6.1% 73.7% 14.7%  5.5%
  
          [libx264 @ 02527c60] mb I  I16..4: 19.9%  6.2% 73.9%
  
          [libx264 @ 02527c60] mb P  I16..4:  6.0%  0.2% 12.0%  P16..4: 35.4%  9.6% 16.3%  7.0%  5.6%    skip: 7.8%
  
          [libx264 @ 02527c60] mb B  I16..4:  0.7%  0.0%  4.3%  B16..8: 27.6% 17.2% 17.0%  direct:17.3%  skip:15.9%  L0:39.4% L1:43.2%
  
          BI:17.4%
  
          [libx264 @ 02527c60] final ratefactor: 11.41
  
          [libx264 @ 02527c60] 8x8 transform intra:1.6% inter:4.0%
  
          [libx264 @ 02527c60] coded y,uvDC,uvAC intra: 93.0% 97.0% 94.9% inter: 58.4% 58.7% 50.6%
  
          [libx264 @ 02527c60] i16 v,h,dc,p: 15% 26% 54%  5%
  
          [libx264 @ 02527c60] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 17% 39%  4%  4%  3%  1%  6%  9%
  
          [libx264 @ 02527c60] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 34% 21%  4%  2%  2%  2%  2%  5%
  
          [libx264 @ 02527c60] i8c dc,h,v,p: 51% 24% 19%  6%
  
          [libx264 @ 02527c60] Weighted P-Frames: Y:4.1% UV:1.2%
  
          [libx264 @ 02527c60] ref P L0: 68.2%  9.8% 11.0%  5.6%  4.6%  0.8%  0.0%
  
          [libx264 @ 02527c60] ref B L0: 87.7%  8.0%  3.9%  0.4%
  
          [libx264 @ 02527c60] ref B L1: 97.8%  2.2%
  
          [libx264 @ 02527c60] kb/s:1255.36

  Lastly this is my node code fireing up FFMPEG. (I use the module Fluent-ffmpeg : https://github.com/schaermu/node-fluent-ffmpeg )

      var proc = new ffmpeg({ source: movie, nolog: true, timeout:15000})                         
  
          .addOptions(['-r 15','-b:v 128k','-c:v libx264','-x264opts level=41','-threads 4','-s 640x480','-map 0:v','-map 0:a:0','-c:a mp3','-b:a 160000','-ac 2','-f hls','-hls_time 10','-hls_list_size 6','-hls_wrap 18','-start_number 1 stream.m3u8'])
  
          .writeToStream(res, function(retcode, error){
  
              if (!error){
  
                  console.log('file has been converted succesfully',retcode .green);
  
              }else{
  
                  console.log('file conversion error',error .red);
  
              }
  
          });

  So to conclude this very long and code heavy question :

  I hope this does not come off as a lazy request, but could someone show/explain to me which FFMPEG settings could/should work on all platforms (modern browsers, Android and iOS) producing a stream of a static file which I can send to a HTML5 player.

  [EDIT] what I need if a generic option isn't available

  And if this is not possible as some posts might suggest, I would love to see a set of FFMPEG settings that get's the job done properly as far as mp4 streaming is concerned. (e.g encoding a streamable mp4).

  The streaming mp4 needs the following

  • A shifted moovAtom
  • It needs to be h264

  Thanks very much for your help !