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• ffmpeg concatenate videos keeping data stream

  27 juin 2017, par jabal

  I have 2 video segments where each of them has an AMF data stream embedded.

  ffprobe segment_360p.mp4
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'segment_360p.mp4':
  
    Metadata:
  
      **major_brand     : f4v**
  
      minor_version   : 0
  
      compatible_brands: isommp42m4v
  
      creation_time   : 2017-06-26 19:16:08
  
    Duration: 00:01:14.23, start: 0.000000, bitrate: 1055 kb/s
  
      Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 640x360 [SAR 1:1 DAR 16:9], 933 kb/s, 29.76 fps, 29.97 tbr, 90k tbn, 59.94 tbc (defa
  
  lt)
  
      Metadata:
  
        creation_time   : 2017-06-26 19:16:08
  
        handler_name    : WowzaStreamingEngine
  
        encoder         : WowzaStreamingEngine
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 116 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-06-26 19:16:08
  
        handler_name    : WowzaStreamingEngine
  
      Stream #0:2(eng): Data: none (amf0 / 0x30666D61), 0 kb/s (default)
  
      Metadata:
  
        creation_time   : 2017-06-26 19:16:08
  
        handler_name    : WowzaStreamingEngine

  I am using ffmpeg to concatenate two such videos with the -f concat filter (ffmpeg -f concat -i mylist.txt -c copy output.mp4) Unfortunately in the output stream this data stream is completely lost :

  ffprobe output.mp4
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
  
    Metadata:
  
      **major_brand     : isom**
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf56.16.102
  
    Duration: 00:03:38.93, start: 0.000000, bitrate: 1032 kb/s
  
      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 640x360 [SAR 1:1 DAR 16:9], 903 kb/s, 29.50 fps, 29.97 tbr, 90k tbn, 59.94 tbc (defau
  
  lt)
  
      Metadata:
  
        handler_name    : VideoHandler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 120 kb/s (default)
  
      Metadata:
  
        handler_name    : SoundHandler

  While looking at the output, I noticed that the "major_brand" changed from f4v to isom, not sure if that is related or not.

  How can I preserve the data stream while concatenating videos ?

• A ffmpeg comman canwork in cmd but not in Python using subprocess.call() or os.system()

  6 juin 2018, par Starrysky

  I wanna transfer a .mp3 to .wav. This is my command :
  ffmpeg -i a.mp3 -ar 16000 -ac 1 -acodec pcm_s16le a.wav

  It worked well in cmd

  C:\Users\starrysky\Documents\GitHub\bing_pic\html>ffmpeg -i a.mp3 -ar 16000 -ac 1 -acodec pcm_s16le a.wav
  
  ffmpeg version N-86482-gbc40674 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 7.1.0 (GCC)
  
    configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --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-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
  
    libavutil      55. 66.100 / 55. 66.100
  
    libavcodec     57. 99.100 / 57. 99.100
  
    libavformat    57. 73.100 / 57. 73.100
  
    libavdevice    57.  7.100 / 57.  7.100
  
    libavfilter     6. 92.100 /  6. 92.100
  
    libswscale      4.  7.101 /  4.  7.101
  
    libswresample   2.  8.100 /  2.  8.100
  
    libpostproc    54.  6.100 / 54.  6.100
  
  Input #0, mp3, from 'a.mp3':
  
    Metadata:
  
      encoder         : Lavf54.6.100
  
    Duration: 00:00:01.87, start: 0.000000, bitrate: 8 kb/s
  
      Stream #0:0: Audio: mp3, 8000 Hz, mono, s16p, 8 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mp3 (native) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  Output #0, wav, to 'a.wav':
  
    Metadata:
  
      ISFT            : Lavf57.73.100
  
      Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc57.99.100 pcm_s16le
  
  size=      59kB time=00:00:01.87 bitrate= 256.3kbits/s speed= 187x
  
  video:0kB audio:58kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.130208%

  but when I moved it into my python program, something strange happened.

  >>> C:\Users\starrysky\Documents\GitHub\bing_pic\html\
  
  'ffmpeg' �����ڲ����ⲿ���Ҳ���ǿ����еij���
  
  ���������ļ���
  
  1 Command 'ffmpeg -i a.mp3 -ar 16000 -ac 1 -acodec pcm_s16le a.wav' returned non-zero exit status 1.
  
  文件错误啊，亲
  
  [WinError 2] 系统找不到指定的文件。: 'a.wav'

  This is part of my python code :

  @bot.register(wife, RECORDING)
  
  def translate_sound(msg):
  
      msg.get_file(save_path='a.mp3')
  
      path = os.path.abspath('.')+'\\'
  
      print(path)
  
      try:
  
          subprocess.check_call('ffmpeg -i a.mp3 -ar 16000 -ac 1 -acodec pcm_s16le a.wav', shell=True)
  
          # ''
  
      except Exception as e:
  
          print(1, e)
  
      wav_to_text('a.wav')
  
      try:
  
          os.remove('a.wav')
  
      except Exception as e:
  
          print(e)

  ---

  # 调用百度语音识别API
  
  def get_token():
  
      URL = 'http://openapi.baidu.com/oauth/2.0/token'
  
      _params = urllib.parse.urlencode({'grant_type': b'client_credentials',
  
                                        'client_id': b''
  
                                        'client_secret': b''})
  
      _res = urllib.request.Request(URL, _params.encode())
  
      _response = urllib.request.urlopen(_res)
  
      _data = _response.read()
  
      _data = json.loads(_data)
  
      return _data['access_token']
  
  
  
  
  
  def wav_to_text(wav_file):
  
      try:
  
          wav_file = open(wav_file, 'rb')
  
      except IOError:
  
          print('文件错误啊，亲')
  
          return
  
      wav_file = wave.open(wav_file)
  
      n_frames = wav_file.getnframes()
  
      print('n_frames ', n_frames)
  
      frame_rate = wav_file.getframerate()
  
      print("frame_rate ", frame_rate)
  
      if n_frames == 1 or frame_rate not in (8000, 16000):
  
          print('不符合格式')
  
          return
  
      audio = wav_file.readframes(n_frames)
  
      seconds = n_frames/frame_rate+1
  
      minute = int(seconds/60 + 1)
  
      for i in range(0, minute):
  
          sub_audio = audio[i*60*frame_rate:(i+1)*60*frame_rate]
  
          base_data = base64.b64encode(sub_audio)
  
          data = {"format": "wav",
  
                  "token": get_token(),
  
                  "len": len(sub_audio),
  
                  "rate": frame_rate,
  
                  "speech": base_data.decode(),
  
                  "cuid": "B8-AC-6F-2D-7A-94",
  
                  "channel": 1}
  
          data = json.dumps(data)
  
          res = urllib.request.Request('http://vop.baidu.com/server_api',
  
                                data.encode(),
  
                                {'content-type': 'application/json'})
  
          response = urllib.request.urlopen(res)
  
          res_data = json.loads(response.read())
  
          try:
  
              print(res_data['result'][0])
  
          except Exception as e:
  
              print(e)

  What happened ?

• ffmpeg : aspect ratio of image in a slideshow

  26 juin 2020, par worov

  I have a bunch of images PNG files. I'm trying to make a slideshow with these using ffmpeg. The images are 3000*4000. These images don't have all the same aspect ratio.

  



  Some are like these :

  



  

  



  Some are like this :

  



  

  



  I used the command :

  



  ffmpeg -loop 1 -framerate 1/10 -i img%3d.png -i audio.wav -vf scale=w=3840:h=-1 -vcodec libx264 -crf 14 -r 60 -pix_fmt yuv420p -shortest output.mp4


  



  It returns me this :

  



     ffmpeg version 3.3.2 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 6.3.0 (Debian 6.3.0-18) 20170516
  configuration: --disable-decoder=amrnb --disable-decoder=libopenjpeg --disable-mips32r2 --disable-mips32r6 --disable-mips64r6 --disable-mipsdsp --disable-mipsdspr2 --disable-mipsfpu --disable-msa --disable-libopencv --disable-podpages --disable-stripping --enable-avfilter --enable-avresample --enable-gcrypt --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libilbc --enable-libkvazaar --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx265 --enable-libxvid --enable-libzvbi --enable-nonfree --enable-opengl --enable-openssl --enable-postproc --enable-pthreads --enable-shared --enable-version3 --incdir=/usr/include/x86_64-linux-gnu --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --toolchain=hardened --enable-frei0r --enable-chromaprint --enable-libx264 --enable-libiec61883 --enable-libdc1394 --enable-vaapi --disable-opencl --enable-libmfx --disable-altivec --shlibdir=/usr/lib/x86_64-linux-gnu
  libavutil      55. 58.100 / 55. 58.100
  libavcodec     57. 89.100 / 57. 89.100
  libavformat    57. 71.100 / 57. 71.100
  libavdevice    57.  6.100 / 57.  6.100
  libavfilter     6. 82.100 /  6. 82.100
  libavresample   3.  5.  0 /  3.  5.  0
  libswscale      4.  6.100 /  4.  6.100
  libswresample   2.  7.100 /  2.  7.100
  libpostproc    54.  5.100 / 54.  5.100
Input #0, image2, from 'img%3d.png':
  Duration: 00:02:30.00, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgb24(pc), 4000x3000 [SAR 7087:7087 DAR 4:3], 0.10 tbr, 0.10 tbn, 0.10 tbc
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, wav, from 'audio.wav':
  Duration: 01:54:44.14, bitrate: 1536 kb/s
    Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x55c1be935420] using SAR=1/1
[libx264 @ 0x55c1be935420] frame MB size (240x180) > level limit (36864)
[libx264 @ 0x55c1be935420] MB rate (2592000) > level limit (2073600)
[libx264 @ 0x55c1be935420] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x55c1be935420] profile High, level 5.2
[libx264 @ 0x55c1be935420] 264 - core 150 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 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=6 lookahead_threads=1 sliced_threads=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 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=14.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    encoder         : Lavf57.71.100
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p(progressive), 3840x2880 [SAR 1:1 DAR 4:3], q=-1--1, 60 fps, 15360 tbn, 60 tbc
    Metadata:
      encoder         : Lavc57.89.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1: Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc57.89.100 aac
[image2 @ 0x55c1be8edde0] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
More than 1000 frames duplicated    5309kB time=00:00:09.13 bitrate=4762.0kbits/s dup=599 drop=0 speed=0.164x   
More than 10000 frames duplicated 137722kB time=00:02:39.13 bitrate=7089.8kbits/s dup=9584 drop=0 speed=0.174x   
More than 100000 frames duplicated429964kB time=00:27:39.13 bitrate=7060.5kbits/s dup=99434 drop=0 speed=0.173x   
frame=413401 fps= 10 q=-1.0 Lsize= 5962186kB time=01:54:49.96 bitrate=7088.9kbits/s dup=413310 drop=0 speed=0.173x   
video:5831116kB audio:117825kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.222641%
[libx264 @ 0x55c1be935420] frame I:2068  Avg QP: 6.65  size:2816521
[libx264 @ 0x55c1be935420] frame P:104040 Avg QP:10.85  size:   470
[libx264 @ 0x55c1be935420] frame B:307293 Avg QP:16.51  size:   318
[libx264 @ 0x55c1be935420] consecutive B-frames:  0.8%  0.0%  0.5% 98.7%
[libx264 @ 0x55c1be935420] mb I  I16..4:  7.3% 54.6% 38.1%
[libx264 @ 0x55c1be935420] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.2%  0.0%  0.0%  0.0%  0.0%    skip:99.8%
[libx264 @ 0x55c1be935420] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.0%  0.0%  0.0%  direct: 0.0%  skip:100.0%  L0:49.5% L1:50.5% BI: 0.0%
[libx264 @ 0x55c1be935420] 8x8 transform intra:54.6% inter:97.9%
[libx264 @ 0x55c1be935420] coded y,uvDC,uvAC intra: 98.2% 92.7% 92.2% inter: 0.0% 0.0% 0.0%
[libx264 @ 0x55c1be935420] i16 v,h,dc,p: 17% 12% 36% 35%
[libx264 @ 0x55c1be935420] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 26% 13%  5%  6%  6%  9%  6% 11%
[libx264 @ 0x55c1be935420] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 15% 24% 11%  7%  9%  7% 10%  7% 11%
[libx264 @ 0x55c1be935420] i8c dc,h,v,p: 40% 33% 18% 10%
[libx264 @ 0x55c1be935420] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x55c1be935420] ref P L0: 99.6%  0.0%  0.4%  0.0%
[libx264 @ 0x55c1be935420] ref B L0: 21.9% 78.1%  0.0%
[libx264 @ 0x55c1be935420] ref B L1: 99.5%  0.5%
[libx264 @ 0x55c1be935420] kb/s:6933.00
[aac @ 0x55c1be938aa0] Qavg: 640.546


  



  But the second image is distorted in the video (I can't show you because I don't have enough reputation to post more links).

  



  So I would like to preserve the aspect ratio of each picture : the images shouldn't be distorted. What command should I use for this ?

  



  Thanks in advance.