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• How to pipe output from ffmpeg

  27 février 2015, par Andrew Simpson

  I have a c# desktop app.

  I want to stream an RTSP feed from my camera to my app, and in my app save jpegs as they come through.

  I use mpdecimate to restrict frames that are changes to the previous frame.

  If I open a DOS windows and type in :

  ffmpeg -i rtsp://admin:admin@192.168.0.17:554/video_0 -vf mpdecimate -r 10 output.avi 2>log.txt 

  it works.

  if I put this into a C# app the log file reports :

     ffmpeg version N-69779-g2a72b16 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.9.2 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  
    libavutil      54. 18.100 / 54. 18.100
  
    libavcodec     56. 22.100 / 56. 22.100
  
    libavformat    56. 21.100 / 56. 21.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.100 /  5. 11.100
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, rtsp, from 'rtsp://admin:admin@192.168.0.17:554/video_0':
  
    Metadata:
  
      title           : YOKO Live Streaming
  
      comment         : video_0
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 352x288 [SAR 1:1 DAR 11:9], 90k tbr, 90k tbn, 90k tbc
  
  [NULL @ 04d6a1e0] Unable to find a suitable output format for 'mpdecimate'
  
  mpdecimate: Invalid argument

  So, I tweaked it with things I thought would make it work but still teh same error.

  This is my last attempt at this :

  Process process = new Process();
  
  {
  
      FileStream baseStream = null;  
  
      string arguments = "-i rtsp://admin:admin@192.168.0.17:554/video_0 -vf image2pipe mpdecimate -r 10 - 0";
  
      string file = @"C:\bin\ffmpeg.exe";
  
      process.StartInfo.FileName = file;
  
      process.StartInfo.Arguments = arguments;
  
      process.StartInfo.CreateNoWindow = true;
  
      process.StartInfo.RedirectStandardError = true;
  
      process.StartInfo.RedirectStandardOutput = true;
  
      process.StartInfo.UseShellExecute = false;
  
      Task.Run(() =>
  
      {
  
          try
  
          {
  
              process.Start();
  
              byte[] buffer = new byte[200000];
  
              var error = process.StandardError.ReadToEnd();
  
              baseStream = process.StandardOutput.BaseStream as FileStream;
  
              bool gotHeader = false;
  
              bool imgFound = false;
  
              int counter = 0;
  
              while (true)
  
              {
  
                  byte bit1 = (byte)baseStream.ReadByte();
  
                  buffer[counter] = bit1;
  
                  if (bit1 == 217 && gotHeader)
  
                  {
  
                      if (buffer[counter - 1] == 255)
  
                      {
  
                          byte[] jpeg = new byte[counter];
  
                          Buffer.BlockCopy(buffer, 0, jpeg, 0, counter);
  
                          using (MemoryStream ms = new MemoryStream(jpeg))
  
                          {
  
                              pictureBox1.Image = Image.FromStream(ms);
  
                              ms.Close();
  
                          }
  
                          imgFound = true;
  
                      }
  
                  }
  
                  else if (bit1 == 216)
  
                  {
  
                      if (buffer[counter - 1] == 255)
  
                      {
  
                          gotHeader = true;
  
                      }
  
                  }
  
                  if (imgFound)
  
                  {
  
                      counter = 0;
  
                      buffer = new byte[200000];
  
                      imgFound = false;
  
                      gotHeader = false;
  
                  }
  
                  else
  
                  {
  
                      counter++;
  
                  }
  
              }
  
          }
  
          catch (Exception ex2)
  
          {
  
              //log error here
  
          }
  
      });
  
  }
  
  catch (Exception ex)
  
  {
  
      //log error here
  
  }

  any suggestion I will glady try out...

• Stremio::FFMPEG Error while opening encoder for output stream #0:1

  28 février 2015, par user2547496

  Getting this error using Stremio::FFMPEG wrapper for converting /MOV to .MP4

  Error while opening encoder for output stream #0:1 - maybe incorrect     parameters such as bit_rate, rate, width or height

  Here are my commands

  require 'streamio-ffmpeg'
  
  movie = FFMPEG::Movie.new("tmp/movie.ogg")
  
  movie.transcode("tmp/movie.mp4")

  Here’s the output =>

  Running transcoding...
  
  ffmpeg -y -i tmp/movie.ogg  tmp/movie.mp4
  
  
  
  E, [2015-02-28T03:06:00.797778 #6381] ERROR -- : Failed encoding...
  
  ffmpeg -y -i tmp/movie.ogg  tmp/movie.mp4
  
  
  
  Output #0, mp4, to 'tmp/movie.mp4':
  
      Stream #0:0: Video: h264, yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 90k tbn, 24 tbc
  
  
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (theora -> libx264)
  
    Stream #0:1 -> #0:1 (flac -> libaacplus)
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  
  
  Errors: encoded file is invalid. 
  
  
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (theora -> libx264)
  
    Stream #0:1 -> #0:1 (flac -> libaacplus)
  
  Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

• Installing GPAC's player - Errors

  25 janvier 2016, par VirMarGu

  I am working with Ubuntu 14.04 LTS 64 bits.
  I am trying to compile and install GPAC’s player (Osmo) in its latest version.

  I had an installed version, but I have tried to compile one new and finally, the previous one doesn’t already work fine.

  I have made the following steps :

  1. sudo apt-get install git
  
  
  
  2. git clone https://github.com/gpac/gpac.git
  
  
  
  3. sudo apt-get install subversion make pkg-config g++ zlib1g-dev libfreetype6-dev libjpeg62-dev libpng12-dev libopenjpeg-dev
  
  libmad0-dev libfaad-dev libogg-dev libvorbis-dev libtheora-dev
  
  liba52-0.7.4-dev libavcodec-dev libavformat-dev libavutil-dev
  
  libswscale-dev libavresample-dev libxv-dev x11proto-video-dev
  
  libgl1-mesa-dev x11proto-gl-dev linux-sound-base libxvidcore-dev
  
  libssl-dev libjack-dev libasound2-dev libpulse-dev libsdl1.2-dev
  
  dvb-apps libavcodec-extra libavdevice-dev libmozjs185-dev
  
  
  
  4. cd gpac
  
  
  
  5. ./configure

  The output of the previous execution is :

  ** System Configuration
  
  Install prefix: /usr/local
  
  Source path: /home/vmg/gpac
  
  C   compiler: gcc
  
  C++ compiler: g++
  
  make: make
  
  CPU: x86_64
  
  Big Endian: no
  
  
  
  ** GPAC 0.5.2-DEV rev1167-gaef2bf4-master Core Configuration **
  
  debug version: no
  
  GProf enabled: no
  
  Static build enabled: no
  
  Memory tracking enabled: no
  
  Fixed-Point Version: no
  
  IPV6 Support: yes
  
  Static Modules: no
  
  
  
  ** Detected libraries **
  
  zlib: system
  
  OSS Audio: yes
  
  ALSA Audio: yes
  
  Jack Audio: yes
  
  PulseAudio Audio: yes
  
  DirectFB support: no
  
  X11 Shared Memory support: yes (path: /usr/X11R6)
  
  X11 XVideo support: yes
  
  SDL Support: yes
  
  OpenGL support: yes
  
  TinyGL support: no
  
  OpenSSL support: yes
  
  Mozilla XUL/GECKO support: no
  
  DVB Support: yes
  
  XMLRPC Support: no
  
  wxWidgets support: no
  
  
  
  ** Extra Libraries used **
  
  SpiderMonkey: system
  
  FreeType: system
  
  JPEG: system
  
  OpenJPEG: system
  
  PNG: system
  
  MAD: system
  
  FAAD: system
  
  XVID: system
  
  FFMPEG: system
  
  Xiph OGG: system
  
  Platinum UPnP: no
  
  AVCap: no
  
  Xiph Vorbis: system
  
  Xiph Theora: system
  
  A52 (AC3): system
  
  OpenSVCDecoder: no
  
  OpenHEVCDecoder: no
  
  Freenect: no
  
  
  
  Creating config.mak
  
  config.h is unchanged
  
  Check config.log for detection failures
  
  Done - type 'make help' for make info, 'make' to build

  6. make

     make -C src all
     make[1] : Entering directory

     /home/vmg/gpac/src'
 CC utils/os_divers.c
 CC utils/os_file.c
 CC utils/list.c
 CC utils/bitstream.c
 CC utils/error.c
 CC utils/alloc.c
utils/alloc.c: In function ‘gf_asprintf’:
utils/alloc.c:868:2: warning: implicit declaration of function ‘asprintf’ [-Wimplicit-function-declaration]
 size = asprintf(strp, fmt, args);
 ^
 CC utils/url.c
 CC utils/configfile.c
 CC utils/sha1.c
 CC utils/base_encoding.c
 CC utils/os_net.c
 CC utils/os_thread.c
 CC utils/os_config_init.c
 CC utils/cache.c
utils/cache.c: In function ‘gf_cache_create_entry’:
utils/cache.c:482:10: warning: variable ‘err’ set but not used [-Wunused-but-set-variable]
  GF_Err err;
         ^
utils/cache.c:526:10: warning: variable ‘err’ set but not used [-Wunused-but-set-variable]
  GF_Err err;
         ^
 CC utils/downloader.c
utils/downloader.c: In function ‘gf_dm_connect’:
utils/downloader.c:1385:8: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
   int ret;
       ^
 CC utils/xml_parser.c
 CC utils/utf.c
 CC utils/token.c
 CC utils/color.c
 CC utils/os_module.c
 CC utils/path2d.c
 CC utils/path2d_stroker.c
 CC utils/module.c
 CC utils/uni_bidi.c
 CC utils/ringbuffer.c
 CC utils/map.c
 CC ietf/rtcp.c
 CC ietf/rtp.c
 CC ietf/rtp_packetizer.c
 CC ietf/rtp_pck_3gpp.c
 CC ietf/rtp_pck_mpeg12.c
 CC ietf/rtp_pck_mpeg4.c
 CC ietf/rtsp_command.c
 CC ietf/rtsp_common.c
 CC ietf/rtsp_response.c
 CC ietf/rtsp_session.c
 CC ietf/sdp.c
 CC ietf/rtp_depacketizer.c
 CC ietf/rtp_streamer.c
 CC bifs/arith_decoder.c
 CC bifs/bifs_codec.c
 CC bifs/bifs_node_tables.c
 CC bifs/com_dec.c
 CC bifs/com_enc.c
 CC bifs/conditional.c
 CC bifs/field_decode.c
 CC bifs/field_encode.c
 CC bifs/memory_decoder.c
 CC bifs/predictive_mffield.c
 CC bifs/quantize.c
 CC bifs/script_dec.c
 CC bifs/script_enc.c
 CC bifs/unquantize.c
 CC odf/desc_private.c
 CC odf/descriptors.c
 CC odf/odf_code.c
odf/odf_code.c: In function ‘gf_odf_write_kw’:
odf/odf_code.c:2633:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
 CC odf/odf_codec.c
 CC odf/odf_command.c
odf/odf_command.c: In function ‘gf_odf_write_od_remove’:
odf/odf_command.c:171:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
odf/odf_command.c: In function ‘gf_odf_del_ipmp_update’:
odf/odf_command.c:570:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
 CC odf/qos.c
 CC odf/slc.c
odf/slc.c: In function ‘gf_odf_write_slc’:
odf/slc.c:261:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
 CC odf/ipmpx_code.c
 CC odf/oci_codec.c
 CC odf/ipmpx_dump.c
 CC odf/ipmpx_parse.c
 CC odf/odf_dump.c
 CC odf/odf_parse.c
 CC laser/lsr_enc.c
 CC laser/lsr_dec.c
 CC laser/lsr_tables.c
 CC isomedia/avc_ext.c
 CC isomedia/box_code_3gpp.c
isomedia/box_code_3gpp.c: In function ‘styl_Write’:
isomedia/box_code_3gpp.c:641:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
 CC isomedia/box_code_apple.c
 CC isomedia/box_code_base.c
isomedia/box_code_base.c: In function ‘mp4a_AddBox’:
isomedia/box_code_base.c:3511:12: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
    GF_Err e;
           ^
 CC isomedia/box_code_drm.c
isomedia/box_code_drm.c: In function ‘schm_Write’:
isomedia/box_code_drm.c:196:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
 CC isomedia/box_code_meta.c
 CC isomedia/box_dump.c
 CC isomedia/box_funcs.c
 CC isomedia/data_map.c
 CC isomedia/drm_sample.c
 CC isomedia/isom_intern.c
 CC isomedia/isom_read.c
 CC isomedia/isom_store.c
 CC isomedia/isom_write.c
isomedia/isom_write.c: In function ‘gf_isom_estimate_size’:
isomedia/isom_write.c:3818:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
 CC isomedia/media.c
 CC isomedia/media_odf.c
 CC isomedia/meta.c
 CC isomedia/movie_fragments.c
 CC isomedia/sample_descs.c
 CC isomedia/stbl_read.c
 CC isomedia/stbl_write.c
 CC isomedia/track.c
 CC isomedia/tx3g.c
 CC isomedia/iff.c
 CC isomedia/hint_track.c
 CC isomedia/hinting.c
 CC isomedia/box_code_adobe.c
 CC isomedia/ttml.c
 CC scene_manager/scene_manager.c
scene_manager/scene_manager.c: In function ‘gf_sm_update_bitwrapper_buffer’:
scene_manager/scene_manager.c:764:11: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result]
     fread(data, 1, data_size, f);
          ^
 CC scene_manager/text_to_bifs.c
 CC scene_manager/loader_bt.c
 CC scene_manager/loader_xmt.c
 CC scene_manager/loader_isom.c
 CC scene_manager/loader_qt.c
 CC scene_manager/loader_svg.c
 CC scene_manager/swf_parse.c
scene_manager/swf_parse.c: In function ‘swf_def_bits_jpeg’:
scene_manager/swf_parse.c:2100:10: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
  GF_Err e;
         ^
 CC scene_manager/swf_bifs.c
 CC scene_manager/swf_svg.c
 CC scene_manager/scene_dump.c
 CC scene_manager/scene_stats.c
 CC scene_manager/scene_engine.c
 CC scene_manager/encode_isom.c
 CC terminal/channel.c
 CC terminal/clock.c
 CC terminal/decoder.c
 CC terminal/term_node_init.c
 CC terminal/input_sensor.c
 CC terminal/media_control.c
 CC terminal/media_manager.c
 CC terminal/media_memory.c
 CC terminal/media_object.c
 CC terminal/media_sensor.c
 CC terminal/mpeg4_inline.c
 CC terminal/network_service.c
 CC terminal/object_browser.c
 CC terminal/object_manager.c
 CC terminal/scene.c
 CC terminal/terminal.c
 CC terminal/svg_external.c
 CC compositor/audio_input.c
 CC compositor/audio_mixer.c
 CC compositor/audio_render.c
 CC compositor/bindable.c
 CC compositor/camera.c
 CC compositor/compositor.c
 CC compositor/compositor_2d.c
 CC compositor/compositor_3d.c
 CC compositor/compositor_node_init.c
 CC compositor/drawable.c
 CC compositor/events.c
 CC compositor/font_engine.c
 CC compositor/hc_flash_shape.c
 CC compositor/hardcoded_protos.c
 CC compositor/mesh.c
 CC compositor/mesh_collide.c
 CC compositor/mesh_tesselate.c
 CC compositor/mpeg4_animstream.c
 CC compositor/mpeg4_audio.c
 CC compositor/mpeg4_background.c
 CC compositor/mpeg4_background2d.c
 CC compositor/mpeg4_bitmap.c
 CC compositor/mpeg4_composite.c
 CC compositor/mpeg4_form.c
 CC compositor/mpeg4_geometry_2d.c
 CC compositor/mpeg4_geometry_3d.c
 CC compositor/mpeg4_geometry_ifs2d.c
 CC compositor/mpeg4_geometry_ils2d.c
 CC compositor/mpeg4_gradients.c
 CC compositor/mpeg4_grouping.c
 CC compositor/mpeg4_grouping_2d.c
 CC compositor/mpeg4_grouping_3d.c
 CC compositor/mpeg4_layer_2d.c
 CC compositor/mpeg4_layer_3d.c
 CC compositor/mpeg4_layout.c
 CC compositor/mpeg4_lighting.c
 CC compositor/mpeg4_path_layout.c
 CC compositor/mpeg4_sensors.c
 CC compositor/mpeg4_sound.c
 CC compositor/mpeg4_text.c
 CC compositor/mpeg4_textures.c
 CC compositor/mpeg4_timesensor.c
 CC compositor/mpeg4_viewport.c
 CC compositor/navigate.c
 CC compositor/offscreen_cache.c
 CC compositor/svg_base.c
 CC compositor/svg_filters.c
 CC compositor/svg_font.c
 CC compositor/svg_geometry.c
 CC compositor/svg_grouping.c
 CC compositor/svg_media.c
 CC compositor/svg_paint_servers.c
 CC compositor/svg_text.c
 CC compositor/texturing.c
 CC compositor/texturing_gl.c
 CC compositor/visual_manager.c
 CC compositor/visual_manager_2d.c
 CC compositor/visual_manager_2d_draw.c
 CC compositor/visual_manager_3d.c
 CC compositor/visual_manager_3d_gl.c
 CC compositor/x3d_geometry.c
 CC scenegraph/base_scenegraph.c
 CC scenegraph/mpeg4_animators.c
 CC scenegraph/commands.c
 CC scenegraph/mpeg4_nodes.c
 CC scenegraph/mpeg4_valuator.c
 CC scenegraph/vrml_interpolators.c
 CC scenegraph/vrml_proto.c
 CC scenegraph/vrml_route.c
 CC scenegraph/vrml_script.c
 CC scenegraph/vrml_smjs.c
 CC scenegraph/vrml_tools.c
 CC scenegraph/x3d_nodes.c
 CC scenegraph/svg_attributes.c
 CC scenegraph/svg_types.c
 CC scenegraph/svg_smjs.c
 CC scenegraph/smil_anim.c
 CC scenegraph/smil_timing.c
 CC scenegraph/svg_properties.c
 CC scenegraph/dom_events.c
 CC scenegraph/dom_smjs.c
 CC scenegraph/xbl_process.c
 CC scenegraph/xml_ns.c
 CC scenegraph/html5_media_smjs.c
 CC scenegraph/html5_mse_smjs.c
 CC scenegraph/webvtt_smjs.c
 CC media_tools/isom_tools.c
media_tools/isom_tools.c: In function ‘gf_media_change_pl’:
media_tools/isom_tools.c:2321:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
 GF_Err e;
        ^
 CC media_tools/dash_segmenter.c
media_tools/dash_segmenter.c: In function ‘gf_media_isom_segment_file’:
media_tools/dash_segmenter.c:1666:21: warning: variable ‘SegmentNum’ set but not used [-Wunused-but-set-variable]
        u32 scaler, SegmentNum;
                    ^
media_tools/dash_segmenter.c: In function ‘dasher_isom_segment_file’:
media_tools/dash_segmenter.c:2969:6: warning: ‘track_duration2’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   e = dasher_isom_adjust_last_sample(in, trackNumber, track_duration2, target_duration_in_timescale, fragment_duration_in_sec);
     ^
media_tools/dash_segmenter.c:2952:14: note: ‘track_duration2’ was declared here
   u32 i, j, track_duration2, sample_count = gf_isom_get_sample_count(in, trackNumber);
             ^
 CC media_tools/av_parsers.c
media_tools/av_parsers.c: In function ‘gf_ac3_parser_bs’:
media_tools/av_parsers.c:4694:64: warning: variable ‘syncword’ set but not used [-Wunused-but-set-variable]
 u32 fscod, frmsizecod, bsid, ac3_mod, freq, framesize, bsmod, syncword;
                                                               ^
media_tools/av_parsers.c: In function ‘gf_eac3_parser_bs’:
media_tools/av_parsers.c:4759:45: warning: variable ‘syncword’ set but not used [-Wunused-but-set-variable]
 u32 fscod, bsid, ac3_mod, freq, framesize, syncword, substreamid, lfon, channels, numblkscod;
                                            ^
 CC media_tools/img.c
 CC media_tools/media_import.c
media_tools/media_import.c: In function ‘gf_import_amr_evrc_smv’:
media_tools/media_import.c:3803:54: warning: variable ‘readen’ set but not used [-Wunused-but-set-variable]
 u32 track, trackID, di, sample_rate, block_size, i, readen;
                                                     ^
media_tools/media_import.c: In function ‘gf_import_raw_unit’:
media_tools/media_import.c:6971:35: warning: variable ‘readen’ set but not used [-Wunused-but-set-variable]
 u32 mtype, track, di, timescale, readen;
                                  ^
 CC media_tools/mpegts.c
media_tools/mpegts.c: In function ‘gf_m2ts_process_tdt_tot’:
media_tools/mpegts.c:1952:6: warning: variable ‘data_size’ set but not used [-Wunused-but-set-variable]
 u32 data_size, nb_sections;
     ^
 CC media_tools/m3u8.c
 CC media_tools/mpd.c
media_tools/mpd.c: In function ‘gf_m3u8_fill_mpd_struct.isra.15’:
media_tools/mpd.c:1267:45: warning: ‘pe’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   set->segment_template->duration = (u32)pe->duration_info;
                                            ^
 CC media_tools/dash_client.c
media_tools/dash_client.c: In function ‘gf_dash_update_manifest’:
media_tools/dash_client.c:2083:6: warning: ‘force_timeline_setup’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (force_timeline_setup) {
     ^
media_tools/dash_client.c: In function ‘gf_dash_get_segment_availability_start_time’:
media_tools/dash_client.c:1329:21: warning: ‘scale’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  *segment_duration /= scale;
                    ^
media_tools/dash_client.c:1324:6: note: ‘scale’ was declared here
 u32 scale;
     ^
media_tools/dash_client.c:1328:23: warning: ‘dur’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  *segment_duration = (Double) dur;
                      ^
media_tools/dash_client.c:1323:13: note: ‘dur’ was declared here
 u64 start, dur;
            ^
media_tools/dash_client.c: In function ‘gf_dash_group_current_segment_start_time’:
media_tools/dash_client.c:1331:24: warning: ‘scale’ may be used uninitialized in this function [-Wmaybe-uninitialized]
 return ((Double)start)/scale;
                       ^
media_tools/dash_client.c:1324:6: note: ‘scale’ was declared here
 u32 scale;
     ^
 CC media_tools/media_export.c
 CC media_tools/m2ts_mux.c
media_tools/m2ts_mux.c: In function ‘gf_m2ts_mux_table_get_next_packet’:
media_tools/m2ts_mux.c:486:21: warning: variable ‘table’ set but not used [-Wunused-but-set-variable]
 GF_M2TS_Mux_Table *table;
                    ^
 CC media_tools/filestreamer.c
 CC media_tools/avilib.c
 CC media_tools/mpeg2_ps.c
 CC media_tools/gpac_ogg.c
 CC media_tools/ismacryp.c
 CC media_tools/isom_hinter.c
 CC media_tools/saf.c
 CC media_tools/vobsub.c
 CC media_tools/text_import.c
 CC media_tools/html5_media.c
 CC media_tools/html5_mse.c
media_tools/html5_mse.c: In function ‘gf_mse_parse_segment’:
media_tools/html5_mse.c:783:12: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
    GF_Err e;
           ^
 CC media_tools/webvtt.c
 CC mcrypt/cbc.c
 CC mcrypt/cfb.c
 CC mcrypt/ctr.c
 CC mcrypt/des.c
 CC mcrypt/ecb.c
 CC mcrypt/g_crypt.c
 CC mcrypt/ncfb.c
 CC mcrypt/nofb.c
 CC mcrypt/ofb.c
 CC mcrypt/rijndael-128.c
 CC mcrypt/rijndael-192.c
 CC mcrypt/rijndael-256.c
 CC mcrypt/stream.c
 CC mcrypt/tripledes.c
OBJS utils/os_divers.o utils/os_file.o utils/list.o utils/bitstream.o utils/error.o utils/alloc.o utils/url.o utils/configfile.o  utils/sha1.o  utils/base_encoding.o utils/os_net.o utils/os_thread.o utils/os_config_init.o utils/cache.o utils/downloader.o utils/xml_parser.o utils/utf.o utils/token.o utils/color.o  utils/os_module.o utils/math.o utils/path2d.o utils/path2d_stroker.o utils/module.o utils/uni_bidi.o utils/ringbuffer.o utils/unicode.o utils/map.o   mcrypt/cbc.o mcrypt/cfb.o mcrypt/ctr.o mcrypt/des.o mcrypt/ecb.o mcrypt/g_crypt.o mcrypt/ncfb.o mcrypt/nofb.o mcrypt/ofb.o mcrypt/rijndael-128.o mcrypt/rijndael-192.o mcrypt/rijndael-256.o mcrypt/stream.o mcrypt/tripledes.o  scenegraph/base_scenegraph.o scenegraph/mpeg4_animators.o scenegraph/commands.o scenegraph/mpeg4_nodes.o scenegraph/mpeg4_valuator.o scenegraph/vrml_interpolators.o scenegraph/vrml_proto.o scenegraph/vrml_route.o scenegraph/vrml_script.o scenegraph/vrml_smjs.o scenegraph/vrml_tools.o scenegraph/x3d_nodes.o scenegraph/svg_attributes.o scenegraph/svg_types.o scenegraph/svg_smjs.o scenegraph/smil_anim.o scenegraph/smil_timing.o scenegraph/svg_properties.o scenegraph/dom_events.o  scenegraph/dom_smjs.o scenegraph/xbl_process.o scenegraph/xml_ns.o scenegraph/html5_media_smjs.o scenegraph/html5_mse_smjs.o scenegraph/webvtt_smjs.o ietf/rtcp.o ietf/rtp.o ietf/rtp_packetizer.o ietf/rtp_pck_3gpp.o ietf/rtp_pck_mpeg12.o ietf/rtp_pck_mpeg4.o ietf/rtsp_command.o ietf/rtsp_common.o ietf/rtsp_response.o ietf/rtsp_session.o ietf/sdp.o ietf/rtp_depacketizer.o ietf/rtp_streamer.o bifs/arith_decoder.o bifs/bifs_codec.o bifs/bifs_node_tables.o bifs/com_dec.o bifs/com_enc.o bifs/conditional.o bifs/field_decode.o bifs/field_encode.o bifs/memory_decoder.o bifs/predictive_mffield.o bifs/quantize.o bifs/script_dec.o bifs/script_enc.o bifs/unquantize.o isomedia/avc_ext.o isomedia/box_code_3gpp.o isomedia/box_code_apple.o isomedia/box_code_base.o isomedia/box_code_drm.o isomedia/box_code_meta.o isomedia/box_dump.o isomedia/box_funcs.o isomedia/data_map.o isomedia/drm_sample.o isomedia/isom_intern.o isomedia/isom_read.o isomedia/isom_store.o isomedia/isom_write.o isomedia/media.o isomedia/media_odf.o isomedia/meta.o isomedia/movie_fragments.o isomedia/sample_descs.o isomedia/stbl_read.o isomedia/stbl_write.o isomedia/track.o isomedia/tx3g.o isomedia/iff.o    isomedia/hint_track.o isomedia/hinting.o isomedia/box_code_adobe.o isomedia/ttml.o odf/desc_private.o odf/descriptors.o odf/odf_code.o odf/odf_codec.o odf/odf_command.o odf/qos.o odf/slc.o  odf/ipmpx_code.o odf/oci_codec.o  odf/ipmpx_dump.o odf/ipmpx_parse.o odf/odf_dump.o odf/odf_parse.o media_tools/isom_tools.o media_tools/dash_segmenter.o media_tools/av_parsers.o media_tools/img.o media_tools/media_import.o media_tools/mpegts.o media_tools/m3u8.o media_tools/mpd.o media_tools/dash_client.o  media_tools/media_export.o media_tools/m2ts_mux.o media_tools/filestreamer.o media_tools/avilib.o media_tools/mpeg2_ps.o media_tools/gpac_ogg.o media_tools/ismacryp.o media_tools/isom_hinter.o media_tools/saf.o media_tools/vobsub.o media_tools/text_import.o media_tools/html5_media.o media_tools/html5_mse.o media_tools/webvtt.o  scene_manager/scene_manager.o scene_manager/text_to_bifs.o scene_manager/loader_bt.o scene_manager/loader_xmt.o scene_manager/loader_isom.o scene_manager/loader_qt.o scene_manager/loader_svg.o  scene_manager/swf_parse.o scene_manager/swf_bifs.o scene_manager/swf_svg.o  scene_manager/scene_dump.o scene_manager/scene_stats.o scene_manager/scene_engine.o  scene_manager/encode_isom.o terminal/channel.o terminal/clock.o terminal/decoder.o terminal/term_node_init.o terminal/input_sensor.o terminal/media_control.o terminal/media_manager.o terminal/media_memory.o terminal/media_object.o terminal/media_sensor.o terminal/mpeg4_inline.o terminal/network_service.o terminal/object_browser.o terminal/object_manager.o terminal/scene.o terminal/terminal.o terminal/svg_external.o compositor/audio_input.o compositor/audio_mixer.o compositor/audio_render.o compositor/bindable.o compositor/camera.o compositor/compositor.o compositor/compositor_2d.o compositor/compositor_3d.o compositor/compositor_node_init.o compositor/drawable.o compositor/events.o compositor/font_engine.o compositor/hc_flash_shape.o compositor/hardcoded_protos.o compositor/mesh.o compositor/mesh_collide.o compositor/mesh_tesselate.o compositor/mpeg4_animstream.o compositor/mpeg4_audio.o compositor/mpeg4_background.o compositor/mpeg4_background2d.o compositor/mpeg4_bitmap.o compositor/mpeg4_composite.o compositor/mpeg4_form.o compositor/mpeg4_geometry_2d.o compositor/mpeg4_geometry_3d.o compositor/mpeg4_geometry_ifs2d.o compositor/mpeg4_geometry_ils2d.o compositor/mpeg4_gradients.o compositor/mpeg4_grouping.o compositor/mpeg4_grouping_2d.o compositor/mpeg4_grouping_3d.o compositor/mpeg4_layer_2d.o compositor/mpeg4_layer_3d.o compositor/mpeg4_layout.o compositor/mpeg4_lighting.o compositor/mpeg4_path_layout.o compositor/mpeg4_sensors.o compositor/mpeg4_sound.o compositor/mpeg4_text.o compositor/mpeg4_textures.o compositor/mpeg4_timesensor.o compositor/mpeg4_viewport.o compositor/navigate.o compositor/offscreen_cache.o compositor/svg_base.o compositor/svg_filters.o compositor/svg_font.o compositor/svg_geometry.o compositor/svg_grouping.o compositor/svg_media.o compositor/svg_paint_servers.o compositor/svg_text.o compositor/texturing.o compositor/texturing_gl.o compositor/visual_manager.o compositor/visual_manager_2d.o compositor/visual_manager_2d_draw.o compositor/visual_manager_3d.o compositor/visual_manager_3d_gl.o compositor/x3d_geometry.o laser/lsr_enc.o laser/lsr_dec.o laser/lsr_tables.o
LIBS -lm -L/usr/local/lib -lGL -lGLU -lX11  -lz -lssl -lcrypto -lmozjs185 -lplds4 -lplc4 -lnspr4   -ljpeg -lpng -lpthread -ldl
mv ../bin/gcc/libgpac.so ../bin/gcc/libgpac.so.6.0.0
ln -sf libgpac.so.6.0.0 ../bin/gcc/libgpac.so.6
ln -sf libgpac.so.6.0.0 ../bin/gcc/libgpac.so
make[1]: Leaving directory

     /home/vmg/gpac/src’
     make -C applications all
     make[1] : Entering directory

     /home/vmg/gpac/applications'
set -e; for i in  mp4client  mp4box  mp42ts  dashcast ; do make -C $i all; done
make[2]: Entering directory

     /home/vmg/gpac/applications/mp4client’
     make[2] : Leaving directory

     /home/vmg/gpac/applications/mp4client'
make[2]: Entering directory

     /home/vmg/gpac/applications/mp4box’
     make[2] : Leaving directory

     /home/vmg/gpac/applications/mp4box'
make[2]: Entering directory

     /home/vmg/gpac/applications/mp42ts’
     make[2] : Leaving directory

     /home/vmg/gpac/applications/mp42ts'
make[2]: Entering directory

     /home/vmg/gpac/applications/dashcast’
     CC audio_decoder.c
     audio_decoder.c : In function ‘dc_audio_decoder_read’ :
     audio_decoder.c:276:48 : error : ‘AVFrame’ has no member named ‘channels’
     int num_channels = audio_input_data->aframe->channels ;
     ^
     make[2] : * [audio_decoder.o] Error 1
     make[2] : Leaving directory

     /home/vmg/gpac/applications/dashcast'
make[1]: *** [apps] Error 2
make[1]: Leaving directory

     /home/vmg/gpac/applications’
     make : * [all] Error 2

  Regarding to ffmpeg-libraries :

  ffmpeg version N-74748-gbaeb8f5 Copyright (c) 2000-2015 the FFmpeg developers
  
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libdcadec --enable-libfreetype --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvo-aacenc --enable-libvidstab
  
  libavutil      54. 31.100 / 54. 31.100
  
  libavcodec     56. 59.100 / 56. 59.100
  
  libavformat    56. 40.101 / 56. 40.101
  
  libavdevice    56.  4.100 / 56.  4.100
  
  libavfilter     5. 40.100 /  5. 40.100
  
  libavresample   2.  1.  0 /  2.  1.  0
  
  libswscale      3.  1.101 /  3.  1.101
  
  libswresample   1.  2.101 /  1.  2.101
  
  libpostproc    53.  3.100 / 53.  3.100

  I don’t know if the error is due to some incompatibility with the libraries or if I must uninstall the previous GPAC (I don’t know how to make it because there is no uninstall script).

  I will appreciate any help.
  Thank you !