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• vaapi_encode : Convert to send/receive API

  20 décembre 2018, par Mark Thompson

  vaapi_encode : Convert to send/receive API
  This attaches the logic of picking the mode of for the next picture to
  
  the output, which simplifies some choices by removing the concept of
  
  the picture for which input is not yet available.  At the same time,
  
  we allow more complex reference structures and track more reference
  
  metadata (particularly the contents of the DPB) for use in the
  
  codec-specific code.
  It also adds flags to explicitly track the available features of the
  
  different codecs.  The new structure also allows open-GOP support, so
  
  that is now available for codecs which can do it.
  

  • [DH] doc/encoders.texi
  • [DH] libavcodec/vaapi_encode.c
  • [DH] libavcodec/vaapi_encode.h
  • [DH] libavcodec/vaapi_encode_h264.c
  • [DH] libavcodec/vaapi_encode_h265.c
  • [DH] libavcodec/vaapi_encode_mjpeg.c
  • [DH] libavcodec/vaapi_encode_mpeg2.c
  • [DH] libavcodec/vaapi_encode_vp8.c
  • [DH] libavcodec/vaapi_encode_vp9.c

• Apply filters to video while preview and save it with applied filter and original audio in android

  27 novembre 2019, par FreakInDroid

  I am new to video processing. I want to apply a filter to a video at runtime, and I want to save that video after filter applied.

  Regarding this I’m doing a research. I has gone through many libraries but I’m struggling to achieve my aim.

  Developement environment

  Migw-64 with windows 7 64 bit
  
  Android Studio 2.1 preview 5
  
  heap space 4GB 
  
  com.android.tools.build:gradle:2.1.0
  
  android-ndk-r12-win-x86_64
  
  com.android.tools.build:gradle-experimental:0.7.0  --> to build NDK

  I have tried

  1. AndroidFastImageprocessingLibrary

     Chrisbatt -> AndroidFastImageProcessing in github

     This library use GLSurfaceview to display filters but we could not save it to mp4 file.

     So I found another implementation of it icmobilelab -> AndroidFastImageProcessing in github

     This library use JavaCV with ffmpeg compiled. But it failed.

  2. JavaCV

     JavaCV use outdated ffmpeg and it is abandoned.

  3. Grafika -> on github

     I tried Android Fast Image Processing with RecordFBOActivity in grafika. But i have failed. This library use MediaRecorder to record the contents of GLSurfaceView. But it records video without audio (I have tested the RecordFBOActivity and analyze the code).

  4. filter packs in platform_frameworks

     github.com/android/platform_frameworks_base/blob/master/media/mca/filterpacks/java/android/filterpacks/videosink/MediaEncoderFilter.java
     its android 4.2 edited core. I can’t run this code because too many jni dependencies.

  5. ffmpeg

     github.com/guardianproject/android-ffmpeg
     I tried ffmpeg3.1 compilation procedure implemented by guardianproject. it successfullay built a static library but i cannot build dynamic library (so files). I’m stuck with a linker error. I think the linking order matters. I tried the linking order specified in below link
     https://fritzone.wordpress.com/2010/05/11/link-with-static-ffmpeg/
     but it won’t help. the following error occurs

     [armeabi-v7a] SharedLibrary  : libffmpeg.so
     
     jni/ffmpeg.c:200: error: undefined reference to 'av_frame_alloc'
     
     jni/ffmpeg.c:201: error: undefined reference to 'av_frame_alloc'
     
     jni/ffmpeg.c:209: error: undefined reference to 'av_register_all'
     
     jni/ffmpeg.c:210: error: undefined reference to 'avfilter_register_all'
     
     jni/ffmpeg.c:45: error: undefined reference to 'avformat_open_input'
     
     jni/ffmpeg.c:50: error: undefined reference to 'avformat_find_stream_info'
     
     jni/ffmpeg.c:56: error: undefined reference to 'av_find_best_stream'
     
     jni/ffmpeg.c:63: error: undefined reference to 'av_opt_set_int'
     
     jni/ffmpeg.c:66: error: undefined reference to 'avcodec_open2'
     
     jni/ffmpeg.c:67: error: undefined reference to 'av_log'
     
     jni/ffmpeg.c:78: error: undefined reference to 'avfilter_get_by_name'
     
     jni/ffmpeg.c:79: error: undefined reference to 'avfilter_get_by_name'
     
     jni/ffmpeg.c:80: error: undefined reference to 'avfilter_inout_alloc'
     
     jni/ffmpeg.c:81: error: undefined reference to 'avfilter_inout_alloc'
     
     jni/ffmpeg.c:85: error: undefined reference to 'avfilter_graph_alloc'
     
     jni/ffmpeg.c:98: error: undefined reference to 'avfilter_graph_create_filter'
     
     jni/ffmpeg.c:106: error: undefined reference to 'avfilter_graph_create_filter'
     
     jni/ffmpeg.c:113: error: undefined reference to 'av_int_list_length_for_size'
     
     jni/ffmpeg.c:113: error: undefined reference to 'av_opt_set_bin'
     
     jni/ffmpeg.c:116: error: undefined reference to 'av_log'
     
     jni/ffmpeg.c:131: error: undefined reference to 'av_strdup'
     
     jni/ffmpeg.c:142: error: undefined reference to 'av_strdup'
     
     jni/ffmpeg.c:147: error: undefined reference to 'avfilter_graph_parse_ptr'
     
     jni/ffmpeg.c:151: error: undefined reference to 'avfilter_graph_config'
     
     jni/ffmpeg.c:155: error: undefined reference to 'avfilter_inout_free'
     
     jni/ffmpeg.c:156: error: undefined reference to 'avfilter_inout_free'
     
     jni/ffmpeg.c:218: error: undefined reference to 'av_read_frame'
     
     jni/ffmpeg.c:223: error: undefined reference to 'avcodec_decode_video2'
     
     jni/ffmpeg.c:230: error: undefined reference to 'av_frame_get_best_effort_timestamp'
     
     jni/ffmpeg.c:233: error: undefined reference to 'av_buffersrc_add_frame_flags'
     
     jni/ffmpeg.c:234: error: undefined reference to 'av_log'
     
     jni/ffmpeg.c:240: error: undefined reference to 'av_buffersink_get_frame'
     
     jni/ffmpeg.c:171: error: undefined reference to 'av_rescale_q'
     
     jni/ffmpeg.c:246: error: undefined reference to 'av_frame_unref'
     
     jni/ffmpeg.c:248: error: undefined reference to 'av_frame_unref'
     
     jni/ffmpeg.c:251: error: undefined reference to 'av_packet_unref'
     
     jni/ffmpeg.c:254: error: undefined reference to 'avfilter_graph_free'
     
     jni/ffmpeg.c:255: error: undefined reference to 'avcodec_close'
     
     jni/ffmpeg.c:256: error: undefined reference to 'avformat_close_input'
     
     jni/ffmpeg.c:257: error: undefined reference to 'av_frame_free'
     
     jni/ffmpeg.c:258: error: undefined reference to 'av_frame_free'
     
     jni/include/libavutil/error.h:111: error: undefined reference to 'av_strerror'
     
     collect2.exe: error: ld returned 1 exit status
     
     make: *** [obj/local/armeabi/libffmpeg.so] Error 1

  6. MediaCodec, MediaExtractor,MediaRecord,MediaMuxer

     Finally I planned to combine AndroidFastImageProcessing with MediaCodec, MediaExtractor,MediaRecord,MediaMuxer.

     So I try to Extract audio from video using mediamuxer
     https://gist.github.com/sayan801/9a39ccad0818d2b3499a.
     I use mp4 video (MIME Type video/avc that have 2 tracks audio and video) to extract audio but the resultant file is corrupted (just 4 kb)

  I think this question is another view of the existing problem if anybody experienced this problem please guide me.

• Ffmpeg does not properly convert videos when run as daemon

  20 janvier 2019, par DGoiko

  I’m using ffmpeg to convert and split videos from a Python process. When I run it from console as a normal user everything works as expected, however, if I run it as a daemon it produces the same amount of files but with silence in almost the whole file.

  This is the line I execute from python :

  def convert_to_ffmpeg(file, ffmpeg_folder, chunk_length):
  
      res = -1
  
      try:
  
          file_name = os.path.join(ffmpeg_folder, ntpath.basename(file) + ".flac")
  
          res = os.system("ffmpeg -i " + file + " -f segment -segment_time "+str(chunk_length)+" " + file_name + " -y  >/dev/null 2>&1")
  
      except Exception as e:
  
          raise MyException(code=210005, detalails=file, cause=e)
  
      if not res == 0:
  
          raise MyException(code=210004, detalails=str(res) + " - " + file)
  
      return file_name

  When I run it from a normal console it works as expected : it splits the video in chunks of "self._chunk_length" seconds.

  However, if I run the program using python-daemon with this code :

  if daemon_run:
  
      pid_file = check_unclean_exit(config['pidfile'], log)
  
  
  
      context = daemon.DaemonContext(
  
          working_directory=approot,
  
          umask=0o002,
  
          pidfile=pid_file,
  
      )
  
      context.signal_map = {
  
          signal.SIGTERM: programa_cleanup,
  
          signal.SIGHUP: 'terminate',
  
          # signal.SIGUSR1: reload_program_config,
  
      }
  
  
  
      with context:
  
          convert_to_ffmpeg("/foo/testfile.mkv", "/foo/ffmpeg", 40) 

  It produces EXACTLY the same chunks, however, most of the content of the chunks is just silence. It splits in the proper point, but doesn’t fill the contents of the audio output properly. Of course, no exception is thrown, as ffmpeg always returns 0

  I did even install a completly fresh Debian 9 into a virtual machine to discard problems with ffmpeg and my old-good computer’s setup.

  Of course this is a simplified example. The real thing is a multithread application which watches a directory for files to convert.