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• FFMPEG libfdk_aac codec with VBR option not supported

  25 septembre 2018, par Piri

  I’m trying to makes an app that uses terminal ffmpeg with libfdk_aac codec.
  The problem is when I use -VBR mode, the result Bit rate mode is always Constant(CBR).

  I’ve searched about this problem and I’ve found the following article :

  https://lists.ffmpeg.org/pipermail/ffmpeg-user/2013-February/013652.html
  this article is from 2013 and seems is still valid !

  Also i am not the only one with this problem
  https://superuser.com/questions/1326239/encoding-aac-from-wav?rq=1

  My terminal string is :

  ffmpeg -i input* -c:a libfdk_aac -vbr 4 output**

  1. *- input formats can be : FLAC, WEBM, MP4
  2. **- output formats can be : M4A, AAC

  Question is : Can this be solved with the current version of ffmpeg :
  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) ??
  if not, is using directly fdkaac from terminal the only option ?

  Any Help is much appreciated.

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

  27 octobre 2018, par varmashrivastava

  I am using below command to add Fade In Fade Out effect to my video

  {"-y", "-ss", "" + startMs / 1000, "-t", "" + (endMs - startMs) / 1000, "-i", inputPath, "-acodec", "copy", "-vf", "fade=t=in:st=0:d=5,fade=t=out:st=" + String.valueOf((endMs - startMs) / 1000 - 5) + ":d=5", outputPath};

  I received below error-

  "Failure3.3 5 .3gpffmpeg version n3.0.1 Copyright (c) 2000-2016 the
  FFmpeg developers\n built with gcc 4.8 (GCC)\n configuration :
  —target-os=linux —cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi-
  —arch=arm —cpu=cortex-a8 —enable-runtime-cpudetect —sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot
  —enable-pic —enable-libx264 —enable-libass —enable-libfreetype —enable-libfribidi —enable-libmp3lame —enable-fontconfig —enable-pthreads —disable-debug —disable-ffserver —enable-version3 —enable-hardcoded-tables —disable-ffplay —disable-ffprobe —enable-gpl —enable-yasm —disable-doc —disable-shared —enable-static —pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config —prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a —extra-cflags=’-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include
  -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all’ —extra-ldflags=’-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib
  -Wl,-z,relro -Wl,-z,now -pie’ —extra-libs=’-lpng -lexpat -lm’ —extra-cxxflags=\n libavutil 55. 17.103 / 55. 17.103\n libavcodec 57. 24.102 / 57. 24.102\n libavformat 57. 25.100 /
  57. 25.100\n libavdevice 57. 0.101 / 57. 0.101\n libavfilter 6. 31.100 / 6. 31.100\n libswscale 4. 0.100 / 4. 0.100\n libswresample 2. 0.101 / 2. 0.101\n libpostproc 54. 0.100 /
  54. 0.100\nInput #0, mov,mp4,m4a,3gp,3g2,mj2, from ’/storage/emulated/0/DCIM/Camera/VID_20180825_071734915.3gp’ :\n
  Metadata :\n major_brand : 3gp4\n minor_version : 0\n
  compatible_brands : isom3gp4\n creation_time : 2018-08-25
  01:47:47\n com.android.version : 8.0.0\n Duration : 00:00:10.83,
  start : 0.000000, bitrate : 17217 kb/s\n Stream #0:0(eng) : Video :
  h264 (High) (avc1 / 0x31637661), yuv420p(tv, unknown/bt470bg/unknown),
  1920x1080, 16756 kb/s, SAR 1:1 DAR 16:9, 29.49 fps, 29.58 tbr, 90k
  tbn, 180k tbc (default)\n Metadata :\n rotate : 90\n
  creation_time : 2018-08-25 01:47:47\n handler_name :
  VideoHandle\n Side data :\n displaymatrix : rotation of -90.00
  degrees\n Stream #0:1(eng) : Audio : aac (LC) (mp4a / 0x6134706D),
  48000 Hz, mono, fltp, 128 kb/s (default)\n Metadata :\n
  creation_time : 2018-08-25 01:47:47\n handler_name :
  SoundHandle\n[h263 @ 0xf49ff400] H.263 does not support resolutions
  above 2048x1152\nOutput #0, 3gp, to
  ’/storage/emulated/0/Movies/fade_video.3gp’ :\n Metadata :\n
  major_brand : 3gp4\n minor_version : 0\n
  compatible_brands : isom3gp4\n com.android.version : 8.0.0\n
  Stream #0:0(eng) : Video : h263, none, q=2-31, 128 kb/s, SAR 1:1 DAR
  0:0, 29.58 fps (default)\n Metadata :\n handler_name :
  VideoHandle\n creation_time : 2018-08-25 01:47:47\n
  encoder : Lavc57.24.102 h263\n Stream #0:1(eng) : Audio : aac
  (LC) (mp4a / 0x6134706D), 48000 Hz, mono, 128 kb/s (default)\n
  Metadata :\n creation_time : 2018-08-25 01:47:47\n
  handler_name : SoundHandle\nStream mapping :\n Stream #0:0 -> #0:0
  (h264 (native) -> h263 (native))\n Stream #0:1 -> #0:1 (copy)\nError
  while opening encoder for output stream #0:0 - maybe incorrect
  parameters such as bit_rate, rate, width or height\n"

  Why is causing this error in above command ?Any help will be welcome.

• FFmpeg in Python File already exists error

  24 septembre 2018, par Abdul Rehman

  I’m working on a project using python(3.6) and Django(2.0) in which i’m converting a video to mp4 if it’s in any other formate.

  Here’s my code :

  from views.py :

  def generate_thumbnail(filename, thumb_name):
  
      print('func called')
  
      print(filename)
  
      video_input_path = os.path.join(filename)
  
      img_output_path = os.path.join(thumb_name)
  
      subprocess.call(['ffmpeg', '-i', video_input_path, '-ss', '00:00:00.000', 'vframes', '1', img_output_path])
  
  
  
  
  
  def convert_to_mp4(video_name, only_name):
  
      os.popen(
  
          "ffmpeg -i '{input}' -ac 2 -b:v 2000k -c:a aac -c:v libx264 -b:a 160k -vprofile high -bf 0 -strict experimental -f mp4 '{output}.mp4'".format(
  
              input=video_name, output=only_name))
  
      return True
  
  
  
  
  
  def perform_upload(video, thumbnail):
  
      print('vdieo name is: {}'.format(video))
  
      servise = discovery.build('storage', 'v1', credentials=credentials)
  
      bucket_name = 'test_bucket004'
  
      print('Uploading the video...')
  
      media = MediaFileUpload(video, chunksize=4149304, mimetype='video/mp4',
  
                              resumable=True)
  
      req = servise.objects().insert(
  
          bucket=bucket_name,
  
          name=str(video),
  
          media_body=media,
  
          body={"cacheControl": "public,max-age=31536000"},
  
          predefinedAcl='publicRead'
  
      )
  
      resp = None
  
      while resp is None:
  
          status, resp = req.next_chunk()
  
      print(resp)
  
      video_url = 'http://storage.googleapis.com/' + bucket_name + '/' + str(video)
  
  
  
      print('Uploading your thumbnail...')
  
      media = MediaFileUpload(thumbnail, chunksize=4149304, mimetype='image/jpeg',
  
                              resumable=True)
  
      req = servise.objects().insert(
  
          bucket=bucket_name,
  
          name=str(thumbnail),
  
          media_body=media,
  
          body={"cacheControl": "public,max-age=31536000"},
  
          predefinedAcl='publicRead'
  
      )
  
      resp = None
  
      while resp is None:
  
          status, resp = req.next_chunk()
  
      print(resp)
  
      thumb_url = 'https://storage.googleapis.com/' + bucket_name + '/' + str(thumbnail)
  
  
  
      return video_url, thumb_url
  
  
  
  
  
  class VideoConverter(generics.ListCreateAPIView):
  
      def get(self, request, *args, **kwargs):
  
          return HttpResponse('Get request', status=200)
  
  
  
      def post(self, request, *args, **kwargs):
  
          serializer = VideoConverterSerializer(data=self.request.data)
  
          validation = serializer.is_valid()
  
          print(serializer.errors)
  
          if validation is True:
  
              url = request.POST.get('video_url')
  
              filename = url.split('/')
  
              filename = filename[-1]
  
              print(filename)
  
              ext = filename.split('.')
  
              print(ext[-1])
  
              only_name = ext[0]
  
              urllib.request.urlretrieve(url, filename)
  
              generate_thumbnail(filename, only_name + '_thumbnail.jpg')
  
              if ext == 'mp4':
  
                  videourl, thumb_url = perform_upload(filename, only_name + '_thumbnail.jpg')
  
              else:
  
                  conversion = convert_to_mp4(filename, only_name)
  
                  if conversion is True:
  
                      videourl, thumb_url = perform_upload(only_name + '.mp4', only_name + '_thumbnail.jpg')
  
  
  
              return HttpResponse('Video url is: {}\n \nThumbnail url is: {}'.format(videourl, thumb_url))
  
          else:
  
              return HttpResponse('Not a valid request')

  But when I pass it a video of Mp4 format it returns an error in the IDE console like this :

  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with Apple LLVM version 10.0.0 (clang-1000.10.43.1)
  configuration : —prefix=/usr/local/Cellar/ffmpeg/4.0.2 —enable-shared —enable-pthreads —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-gpl —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —enable-videotoolbox —disable-lzma
  libavutil 56. 14.100 / 56. 14.100
  libavcodec 58. 18.100 / 58. 18.100
  libavformat 58. 12.100 / 58. 12.100
  libavdevice 58. 3.100 / 58. 3.100
  libavfilter 7. 16.100 / 7. 16.100
  libavresample 4. 0. 0 / 4. 0. 0
  libswscale 5. 1.100 / 5. 1.100
  libswresample 3. 1.100 / 3. 1.100
  libpostproc 55. 1.100 / 55. 1.100
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’PHP_GCS.mp4’ :
  Metadata :
  major_brand : mp42
  minor_version : 1
  compatible_brands : mp41mp42isom
  creation_time : 2018-08-03T13:08:04.000000Z
  Duration : 00:01:21.40, start : 0.000000, bitrate : 1584 kb/s
  Stream #0:0(und) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p, 1918x1078 [SAR 1:1 DAR 137:77], 1581 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc (default)
  Metadata :
  creation_time : 2018-08-03T13:08:04.000000Z
  handler_name : Core Media Video

  File ’PHP_GCS.mp4’ already exists. Overwrite ? [y/N]

  and stop the execution here until I press the enter button.I’m really confused why this is happining because when the video is already mp4 i’m not using ffmpeg but only for thumbnail generaton.

  What can be wrong here ?

  Thanks in advance !