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• `ffmpeg record audio output device

  11 juillet 2020, par Roy

  i am trying to capture my pulse output device :

  


  alsa_output.pci-0000_00_1b.0.analog-stereo.monitor

  


  with this command :

  


  /usr/bin/ffmpeg -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor -c:a aac -b:a 128k /roee_files/test.wav


  


  i get this output with those warnings, and there is an audio delay :

  


  ffmpeg version 3.4.7 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --disable-encoder=libopus --enable-libpulse --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzvbi --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  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
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, pulse, from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor':
  Duration: N/A, start: 1594460535.507972, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
File '/roee_files/test.wav' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, wav, to '/roee_files/test.wav':
  Metadata:
    ISFT            : Lavf57.83.100
    Stream #0:0: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc57.107.100 aac
[aac @ 0x1aec1a0] Queue input is backward in time
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 116419; changing to 120076. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 117443; changing to 120076. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 118467; changing to 120076. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 119491; changing to 120076. This may result in incorrect timestamps in the output file.
[aac @ 0x1aec1a0] Queue input is backward in time
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 123587, current: 118096; changing to 123587. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 123587, current: 119120; changing to 123587. This may result in incorrect timestamps in the output file.


  


  but,
when i am trying to capture my pulse input device with the same command :

  


  /usr/bin/ffmpeg -f pulse -i alsa_input.pci-0000_00_1b.0.analog-stereo -c:a aac -b:a 128k /roee_files/test.wav


  


  everything works fine without any warning or delay as you can see in this output :

  


  ffmpeg version 3.4.7 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --disable-encoder=libopus --enable-libpulse --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzvbi --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  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
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, pulse, from 'alsa_input.pci-0000_00_1b.0.analog-stereo':
  Duration: N/A, start: 1594460998.540483, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
File '/roee_files/test.wav' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, wav, to '/roee_files/test.wav':
  Metadata:
    ISFT            : Lavf57.83.100
    Stream #0:0: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc57.107.100 aac
size=     822kB time=00:00:52.45 bitrate= 128.4kbits/s speed=1.07x


  


  i tried what someone suggest here- to uncomment and change the line, default-sample-rate = 44100 , to default-sample-rate = 48000. (in /etc/pulse/daemon.conf file, and restart PA/computer) withot success.

  


  this is my whole section in this file after changing :

  


  ; default-sample-format = s16le
 default-sample-rate = 48000
; alternate-sample-rate = 48000
; default-sample-channels = 2
; default-channel-map = front-left,front-right

; default-fragments = 4
; default-fragment-size-msec = 25

; enable-deferred-volume = yes
; deferred-volume-safety-margin-usec = 8000
; deferred-volume-extra-delay-usec = 0


  


  Does someone can help me solve this issue PLEASE...

  


  does it relate to sample rate, or maybe other problem ?

  


  thank you all...!

  


• ffmpeg zero latency webcam streaming

  9 août 2022, par SimpleSimon

  I'm trying to use ffmpeg to stream a webcam with as close to zero latency as possible.

  


  My test environment is streaming from localhost to localhost, on a macOS machine.

  


  I've tried every parameter switch that I can understand - and many suggestions found both here and elsewhere. But, the latency is persistently just about one second. And to be honest, none of the options that I've tried appear to make any difference at all.

  


  I've read that it should be possible to get the latency down to a couple of hundred milliseconds - or even as low as a single video frame (in these ideal test conditions). Can anyone help me with the magic ffmpeg settings ?

  


  Here's my base ffmpeg call. Note that I've deliberately not included here any of the exotic options that might help me. I want to start fresh with this question :

  


  ffmpeg -f avfoundation -i "1:none" -vcodec libx264 -preset ultrafast -tune zerolatency -x264-params "" -f mpegts udp://127.0.0.1:9090

  


  I monitor the stream on the same machine using ffplay, with this :

  


  ffplay udp://127.0.0.1:9090

  


  My belief is that ffmpeg (and X264) are somehow buffering the input stream from the webcam during the encoding process. I know why this can be necessary. But, for the purposes of this requirement, I'm prepared to sacrifice everything in the pursuit of low latency. Quality and stability are less important.

  


  I acknowledge that there might be latency in my ffplay monitoring. I'm not so sure though - because I have tested with other monitors, with pretty much the same results. However, I'd be happy to receive advice regarding low latency monitoring.

  


  I'm assuming I'm looking for options that will encode with all i-frames, no lookahead, and no buffering. Am I right ? And if I am, how do I achieve that ?

  


  Thanks !

  


  ---

  


  Output from ffmpeg request, as per Gyan :

  


  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[avfoundation @ 0x7ffbc2008a00] Selected pixel format (yuv420p) is not supported by the input device.
[avfoundation @ 0x7ffbc2008a00] Supported pixel formats:
[avfoundation @ 0x7ffbc2008a00]   uyvy422
[avfoundation @ 0x7ffbc2008a00]   yuyv422
[avfoundation @ 0x7ffbc2008a00]   nv12
[avfoundation @ 0x7ffbc2008a00]   0rgb
[avfoundation @ 0x7ffbc2008a00]   bgr0
[avfoundation @ 0x7ffbc2008a00] Overriding selected pixel format to use uyvy422 instead.
Input #0, avfoundation, from '1:none':
  Duration: N/A, start: 51270.672067, bitrate: N/A
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 17 tbr, 1000k tbn, 1000k tbc
At least one output file must be specified```


---------------------

Second output, as per second request from Gyan:

ffmpeg -f avfoundation -analyzeduration 200k -probesize 6M -pixel_format uyvy422 -i "1:none" -vcodec libx264 -preset ultrafast -tune zerolatency -x264-params "" -f mpegts udp://127.0.0.1:9090
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, avfoundation, from '1:none':
  Duration: N/A, start: 319.565533, bitrate: N/A
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 15 fps, 15 tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7feda5093200] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x7feda5093200] profile High 4:2:2, level 3.1, 4:2:2 8-bit
Output #0, mpegts, to 'udp://127.0.0.1:9090':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: h264 (libx264), yuv422p, 1280x720, q=-1--1, 15 fps, 90k tbn, 15 tbc
    Metadata:
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame= 1209 fps= 14 q=22.0 Lsize=   65771kB time=00:01:24.13 bitrate=6404.1kbits/s speed=   1x    
video:60873kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 8.047672%
[libx264 @ 0x7feda5093200] frame I:5     Avg QP:17.80  size:142658
[libx264 @ 0x7feda5093200] frame P:1204  Avg QP:19.99  size: 51180
[libx264 @ 0x7feda5093200] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x7feda5093200] mb P  I16..4:  5.9%  0.0%  0.0%  P16..4: 71.8%  0.0%  0.0%  0.0%  0.0%    skip:22.3%
[libx264 @ 0x7feda5093200] coded y,uvDC,uvAC intra: 17.4% 87.8% 49.8% inter: 29.4% 74.5% 38.3%
[libx264 @ 0x7feda5093200] i16 v,h,dc,p: 57% 20% 11% 12%
[libx264 @ 0x7feda5093200] i8c dc,h,v,p: 43% 18% 27% 12%
[libx264 @ 0x7feda5093200] kb/s:6186.95
Exiting normally, received signal 2.
slartibartfast:~ simon$ ffmpeg -f avfoundation -analyzeduration 200k -probesize 6M -pixel_format uyvy422 -i "1:none" 
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.2.2_2 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, avfoundation, from '1:none':
  Duration: N/A, start: 421.525767, bitrate: N/A
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 14.25 tbr, 1000k tbn, 1000k tbc
At least one output file must be specified


  


• Taking care of silent priming frames converting mp4 to ts ?

  13 février 2019, par keepitterron

  videoOutputSettings = [
  
    AVVideoCodecKey: AVVideoCodecH264,
  
    AVVideoWidthKey: width,
  
    AVVideoHeightKey: height,
  
    AVVideoCompressionPropertiesKey: [
  
      AVVideoAverageBitRateKey: avgBitRate,
  
      AVVideoExpectedSourceFrameRateKey: fps,
  
      AVVideoProfileLevelKey: AVVideoProfileLevelH264BaselineAutoLevel
  
    ]
  
  ]
  
  audioOutputSettings = [
  
    AVFormatIDKey: kAudioFormatMPEG4AAC,
  
    AVSampleRateKey: 44100,
  
    AVNumberOfChannelsKey: 2
  
  ]

  I record a video + audio with AVCaptureSession (screen, camera and mic in OSX) and i encode it with AVAssetWriter (AVFileType.mp4), swapping the writers every 6 seconds.
  Every time a new part is written, a nodeJS app will be notified and using ffmpeg will convert it to ts with

  ffmpeg -y -i generatedFile.mp4 -c copy -copyts -muxdelay 0 -muxpreload 0 outputFile.ts

  I’ll manually write a m3u8 looking like :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:7
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXTINF:6.140227,
  
  11214532343c4cae953d45e94a1660ea-0.ts
  
  #EXTINF:6.284218,
  
  11214532343c4cae953d45e94a1660ea-1.ts
  
  #EXTINF:6.099999999999998,
  
  11214532343c4cae953d45e94a1660ea-2.ts
  
  #EXTINF:6.133333,
  
  11214532343c4cae953d45e94a1660ea-3.ts
  
  #EXTINF:6.133333,
  
  11214532343c4cae953d45e94a1660ea-4.ts
  
  #EXTINF:6.100000000000001,
  
  11214532343c4cae953d45e94a1660ea-5.ts
  
  #EXTINF:6.133333,
  
  11214532343c4cae953d45e94a1660ea-6.ts
  
  #EXTINF:6.199999999999996,
  
  11214532343c4cae953d45e94a1660ea-7.ts
  
  #EXTINF:6.0666670000000025,
  
  11214532343c4cae953d45e94a1660ea-8.ts
  
  #EXT-X-ENDLIST

  The issue is : I have audio gaps between parts and I believe is AAC’s priming frames not being handled correctly.
  Am I correct in assuming so ?

  example file

  ❯ afinfo 11.mp4
  
  File:           11.mp4
  
  File type ID:   mp4f
  
  Num Tracks:     1
  
  ----
  
  Data format:     2 ch,  44100 Hz, 'aac ' (0x00000000) 0 bits/channel, 0 bytes/packet, 1024 frames/packet, 0 bytes/frame
  
                  no channel layout.
  
  estimated duration: 6.128617 sec
  
  audio bytes: 87558
  
  audio packets: 266
  
  bit rate: 113407 bits per second
  
  packet size upper bound: 401
  
  maximum packet size: 401
  
  audio data file offset: 577163
  
  optimized
  
  audio 270272 valid frames + 2112 priming + 0 remainder = 272384
  
  format list:
  
  [ 0] format:      2 ch,  44100 Hz, 'aac ' (0x00000000) 0 bits/channel, 0 bytes/packet, 1024 frames/packet, 0 bytes/frame
  
  Channel layout: Stereo (L R)
  
  ----

  example file

  ❯ ffprobe -v error -show_format -show_streams 1.mp4
  
  [STREAM]
  
  index=0
  
  codec_name=h264
  
  codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
  
  profile=Baseline
  
  codec_type=video
  
  codec_time_base=1/60
  
  codec_tag_string=avc1
  
  codec_tag=0x31637661
  
  width=1920
  
  height=1080
  
  coded_width=1920
  
  coded_height=1088
  
  has_b_frames=0
  
  sample_aspect_ratio=1:1
  
  display_aspect_ratio=16:9
  
  pix_fmt=yuv420p
  
  level=40
  
  color_range=tv
  
  color_space=bt709
  
  color_transfer=bt709
  
  color_primaries=bt709
  
  chroma_location=bottom
  
  field_order=unknown
  
  timecode=N/A
  
  refs=1
  
  is_avc=true
  
  nal_length_size=4
  
  id=N/A
  
  r_frame_rate=30/1
  
  avg_frame_rate=30/1
  
  time_base=1/600
  
  start_pts=3600
  
  start_time=6.000000
  
  duration_ts=7260
  
  duration=12.100000
  
  bit_rate=4227137
  
  max_bit_rate=N/A
  
  bits_per_raw_sample=8
  
  nb_frames=183
  
  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=2019-02-13T13:21:51.000000Z
  
  TAG:language=und
  
  TAG:handler_name=Core Media Video
  
  [/STREAM]
  
  [STREAM]
  
  index=1
  
  codec_name=aac
  
  codec_long_name=AAC (Advanced Audio Coding)
  
  profile=LC
  
  codec_type=audio
  
  codec_time_base=1/44100
  
  codec_tag_string=mp4a
  
  codec_tag=0x6134706d
  
  sample_fmt=fltp
  
  sample_rate=44100
  
  channels=2
  
  channel_layout=stereo
  
  bits_per_sample=0
  
  id=N/A
  
  r_frame_rate=0/0
  
  avg_frame_rate=0/0
  
  time_base=1/44100
  
  start_pts=272991
  
  start_time=6.190272
  
  duration_ts=545352
  
  duration=12.366259
  
  bit_rate=115688
  
  max_bit_rate=128000
  
  bits_per_raw_sample=N/A
  
  nb_frames=269
  
  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=2019-02-13T13:21:51.000000Z
  
  TAG:language=und
  
  TAG:handler_name=Core Media Audio
  
  [/STREAM]
  
  [FORMAT]
  
  filename=1.mp4
  
  nb_streams=2
  
  nb_programs=0
  
  format_name=mov,mp4,m4a,3gp,3g2,mj2
  
  format_long_name=QuickTime / MOV
  
  start_time=6.000000
  
  duration=12.366259
  
  size=3317034
  
  bit_rate=2145860
  
  probe_score=100
  
  TAG:major_brand=mp42
  
  TAG:minor_version=1
  
  TAG:compatible_brands=mp41mp42isom
  
  TAG:creation_time=2019-02-13T13:21:51.000000Z
  
  [/FORMAT]

  Is there a way I can generate ts files with the encoder delay being taken care of ?