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• How to compile BlackMagic SDK to FFMPEG

  22 août 2018, par Манаф Иракский

  In Mac OS 10.13 I have installed FFMPEG via
  brew install ffmpeg
  I have downloaded the latest BlackMagic SDK from BlackMagic websit.

  I am not sure how I can compile black magic SDK to my ffmpeg.

  Here is the update

  Manafs-MacBook-Pro:ffmpeg Manaf$ ./configure —prefix="$HOME/ffmpeg_build" —extra-cflags="-I$HOME/ffmpeg_build/include" —extra-ldflags="-L$HOME/ffmpeg_build/lib" —bindir="$HOME/bin" —enable-gpl —enable-nonfree —enable-libfdk_aac —enable-libfreetype —enable-libmp3lame —enable-libopus —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libx265 —enable-decklink —extra-cflags=-I/Users/Manaf/Desktop/BM_SDK/Mac/include/ —extra-ldflags=-L/Users/Manaf/Desktop/BM_SDK/Mac/include/

  install prefix /Users/Manaf/ffmpeg_build

  source path .

  C compiler gcc

  C library

  ARCH x86 (generic)

  big-endian no

  runtime cpu detection yes

  standalone assembly yes

  x86 assembler nasm

  MMX enabled yes

  MMXEXT enabled yes

  3DNow ! enabled yes

  3DNow ! extended enabled yes

  SSE enabled yes

  SSSE3 enabled yes

  AESNI enabled yes

  AVX enabled yes

  AVX2 enabled yes

  AVX-512 enabled yes

  XOP enabled yes

  FMA3 enabled yes

  FMA4 enabled yes

  i686 features enabled yes

  CMOV is fast yes

  EBX available yes

  EBP available yes

  debug symbols yes

  strip symbols yes

  optimize for size no

  optimizations yes

  static yes

  shared no

  postprocessing support yes

  network support yes

  threading support pthreads

  safe bitstream reader yes

  texi2html enabled yes

  perl enabled yes

  pod2man enabled yes

  makeinfo enabled yes

  makeinfo supports HTML no

  External libraries : (lots of them I just removed them for this post)

  External libraries providing hardware acceleration :(here too)
  Libraries :(Here too)
  Programs:ffmpeg ffprobe

  Enabled decoders :(here too- so many)

  Enabled hwaccels :(here too)

  Enabled parsers :(here too)

  Enabled demuxers :(here too)

  Enabled muxers :(here too)

  Enabled protocols :(here too)

  Enabled filters :(here too)

  Enabled bsfs :(here too)

  Enabled indevs :

  avfoundation decklink lavfi

  Enabled outdevs :

  decklink

  License : nonfree and unredistributable

  libavutil/avconfig.h is unchanged

  libavcodec/parser_list.c is unchanged

  libavcodec/bsf_list.c is unchanged

  libavformat/demuxer_list.c is unchanged

  libavformat/muxer_list.c is unchanged

  libavdevice/indev_list.c is unchanged

  libavdevice/outdev_list.c is unchanged

  libavformat/protocol_list.c is unchanged

  Manafs-MacBook-Pro:ffmpeg Manaf$ ffmpeg -devices

  ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
  built with Apple LLVM version 7.0.2 (clang-700.1.81)
  configuration : —prefix=/usr/local/Cellar/ffmpeg/3.4.2 —enable-shared —enable-pthreads —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —disable-jack —enable-gpl —enable-libass —enable-libfdk-aac —enable-libfontconfig —enable-libfreetype —enable-libmp3lame —enable-libopus —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libx265 —enable-libxvid —enable-opencl —enable-videotoolbox —disable-lzma —enable-nonfree

  libavutil 55. 78.100 / 55. 78.100

  libavcodec 57.107.100 / 57.107.100

  libavformat 57. 83.100 / 57. 83.100

  libavdevice 57. 10.100 / 57. 10.100

  libavfilter 6.107.100 / 6.107.100

  libavresample 3. 7. 0 / 3. 7. 0

  libswscale 4. 8.100 / 4. 8.100

  libswresample 2. 9.100 / 2. 9.100

  libpostproc 54. 7.100 / 54. 7.100

  Devices :

  D. = Demuxing supported

  .E = Muxing supported

  —

  D avfoundation AVFoundation input device

  D lavfi Libavfilter virtual input dev

  Thanks,

  ./ffmpeg -devices

  ffmpeg version N-90585-g46129b4044 Copyright (c) 2000-2018 the FFmpeg developers
  built with Apple LLVM version 7.0.2 (clang-700.1.81)
  configuration : —prefix=/Users/Manaf/ffmpeg_build —extra-cflags=-I/Users/Manaf/ffmpeg_build/include —extra-ldflags=-L/Users/Manaf/ffmpeg_build/lib —bindir=/Users/Manaf/bin —enable-gpl —enable-nonfree —enable-libfdk_aac —enable-libfreetype —enable-libmp3lame —enable-libopus —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libx265 —enable-decklink —extra-cflags=-I/Users/Manaf/Desktop/BM_SDK/Mac/include/ —extra-ldflags=-L/Users/Manaf/Desktop/BM_SDK/Mac/include/

  libavutil 56. 12.100 / 56. 12.100

  libavcodec 58. 17.100 / 58. 17.100

  libavformat 58. 10.100 / 58. 10.100

  libavdevice 58. 2.100 / 58. 2.100

  libavfilter 7. 14.100 / 7. 14.100

  libswscale 5. 0.102 / 5. 0.102

  libswresample 3. 0.101 / 3. 0.101

  libpostproc 55. 0.100 / 55. 0.100

  Devices :

  D. = Demuxing supported

  .E = Muxing supported

  —

  D avfoundation AVFoundation input device

  DE decklink Blackmagic DeckLink output

  D lavfi Libavfilter virtual input device

• mp4 plays only sound but no video on ios

  5 avril 2018, par Chen

  I have a video that I get from a third party provide in my App, I want to play using react-native-video. It works fine on simulator, but on a real iphone 7 it has only sound but no video.

  After further research I found, when I try to airdrop/move via itunes the video to my iphone. It shows something like the following :

  

  I have checked the codec with ffprobe and here is the output.
  ```

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'bad.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp42mp41
  
      creation_time   : 2018-03-28T21:30:13.000000Z
  
    Duration: 00:00:45.55, start: 0.000000, bitrate: 1373 kb/s
  
      Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 1042 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-03-28T21:30:13.000000Z
  
        handler_name    : Alias Data Handler
  
        encoder         : AVC Coding
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-03-28T21:30:13.000000Z
  
        handler_name    : Alias Data Handler
  
  [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=1001/60000
  
  codec_tag_string=avc1
  
  codec_tag=0x31637661
  
  width=1920
  
  height=1080
  
  coded_width=1920
  
  coded_height=1080
  
  has_b_frames=1
  
  sample_aspect_ratio=1:1
  
  display_aspect_ratio=16:9
  
  pix_fmt=yuv420p
  
  level=41
  
  color_range=tv
  
  color_space=bt709
  
  color_transfer=bt709
  
  color_primaries=bt709
  
  chroma_location=left
  
  field_order=unknown
  
  timecode=N/A
  
  refs=1
  
  is_avc=true
  
  nal_length_size=4
  
  id=N/A
  
  r_frame_rate=30000/1001
  
  avg_frame_rate=30000/1001
  
  time_base=1/30000
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=1365364
  
  duration=45.512133
  
  bit_rate=1042237
  
  max_bit_rate=N/A
  
  bits_per_raw_sample=8
  
  nb_frames=1364
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  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
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:creation_time=2018-03-28T21:30:13.000000Z
  
  TAG:language=eng
  
  TAG:handler_name=Alias Data Handler
  
  TAG:encoder=AVC Coding
  
  [/STREAM]
  
  [STREAM]
  
  index=1
  
  codec_name=aac
  
  codec_long_name=AAC (Advanced Audio Coding)
  
  profile=LC
  
  codec_type=audio
  
  codec_time_base=1/48000
  
  codec_tag_string=mp4a
  
  codec_tag=0x6134706d
  
  sample_fmt=fltp
  
  sample_rate=48000
  
  channels=2
  
  channel_layout=stereo
  
  bits_per_sample=0
  
  id=N/A
  
  r_frame_rate=0/0
  
  avg_frame_rate=0/0
  
  time_base=1/48000
  
  start_pts=0
  
  start_time=0.000000
  
  duration_ts=2184582
  
  duration=45.512125
  
  bit_rate=317375
  
  max_bit_rate=458625
  
  bits_per_raw_sample=N/A
  
  nb_frames=2135
  
  nb_read_frames=N/A
  
  nb_read_packets=N/A
  
  DISPOSITION:default=1
  
  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
  
  DISPOSITION:timed_thumbnails=0
  
  TAG:creation_time=2018-03-28T21:30:13.000000Z
  
  TAG:language=eng
  
  TAG:handler_name=Alias Data Handler
  
  [/STREAM]

  Then I tried VLC on iOS the video played without problem (it has both video and sound), except at the beginning it shows a grey pixel screen.

  

  Next, what i did was using ffmpeg to re-encode the video stream via :

  ffmpeg -i bad.mp4 -c:a copy new.mp4

  After this new.mp4 plays with no problem.
  This is really confusing as the codec does not change and both videos works with no problem on my Mac.

  I have tried to play around with the b_frames, profile level on the new video to reproduce the problem but with no luck.

  I really do not want to process every video via ffmpeg after get it from the third party. Just wondering what might be the problem with the video ?

• FFMPEG : Need to mix dow multiple audio stream to single stereo

  17 avril 2018, par Serge Dumoulin

  I have an input file with 2 stereo stream of audio.
  I am trying to create an output wav file with the audio mixdown :
  first stereo stream mixdown to left channel of a single stereo stream
  Second stereo stream mixdown to right channel of the same stereo stream.
  So output file have only one stereo stream.
  I have tried different things but its not clear how to manage streams and channels inside them. Found no example on how to do this.

  I’ve tried playing with -filter_complex , amix, and amerge filters, as well as the -map parameter, but I can’t seem to find the right combination of values.

  Here was my input file looks like :

  Input #0,
  
    Metadata:
  
      major_brand     : qt  
  
      minor_version   : 537199360
  
      compatible_brands: qt  
  
      creation_time   : 2018-03-20T16:48:32.000000Z
  
      com.apple.finalcutstudio.media.uuid: 2BE95371-6901-42C7-AB84-6357F53A4592
  
    Duration: 00:05:40.38, start: 0.000000, bitrate: 32679 kb/s
  
      Stream #0:0(eng): Video: prores (apco / 0x6F637061), yuv422p10le(bt709, progressive), 1920x1080, 29590 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 23976 tbn, 23976 tbc (default)
  
      Metadata:
  
        creation_time   : 2018-03-20T16:48:32.000000Z
  
        handler_name    : Apple Alias Data Handler
  
        encoder         : Apple ProRes 422 Proxy
  
        timecode        : 09:59:20:00
  
  
  
  Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-03-20T16:48:32.000000Z
  
        handler_name    : Apple Alias Data Handler
  
  
  
  Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
  
      Metadata:
  
        creation_time   : 2018-03-20T16:48:32.000000Z