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• .MKV Video File not playing on Azure Kinect Viewer

  17 avril 2023, par Ashutosh Singla

  I have a video file that contains 4 streams, 3 videos streams and one steam for metadata. I want to extract these streams first with metadata and then want to combine them together with metadata. I would like to play the video on Azure Kinect Viewer so that I can see if I am doing anything wrong while extracting and copying the stream.

  


  Original Stream Info :

  


  Input #0, matroska,webm, from 'output_master.mkv':
Metadata:
title           : Azure Kinect
encoder         : libmatroska-1.4.9
creation_time   : 2021-05-20T12:11:15.000000Z
K4A_DEPTH_DELAY_NS: 0
K4A_WIRED_SYNC_MODE: MASTER
K4A_COLOR_FIRMWARE_VERSION: 1.6.110
K4A_DEPTH_FIRMWARE_VERSION: 1.6.79
K4A_DEVICE_SERIAL_NUMBER: 000123102712
K4A_START_OFFSET_NS: 298800000
Duration: 00:00:40.03, start: 0.000000, bitrate: 480934 kb/s

Stream #0:0(eng): Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 2048x1536, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1000k tbn (default)
Metadata:
  title           : COLOR
  K4A_COLOR_TRACK : 14499183330009048
  K4A_COLOR_MODE  : MJPG_1536P
Stream #0:1(eng): Video: rawvideo (b16g / 0x67363162), gray16be, 640x576, SAR 1:1 DAR 10:9, 30 fps, 30 tbr, 1000k tbn (default)
Metadata:
  title           : DEPTH
  K4A_DEPTH_TRACK : 429408169412322196
  K4A_DEPTH_MODE  : NFOV_UNBINNED
Stream #0:2(eng): Video: rawvideo (b16g / 0x67363162), gray16be, 640x576, SAR 1:1 DAR 10:9, 30 fps, 30 tbr, 1000k tbn (default)
Metadata:
  title           : IR
  K4A_IR_TRACK    : 194324406376800992
  K4A_IR_MODE     : ACTIVE
Stream #0:3: Attachment: none
Metadata:
  filename        : calibration.json
  mimetype        : application/octet-stream
  K4A_CALIBRATION_FILE: calibration.json


  


  I am using the below command to extract Stream #0:0, Stream #0:1, and Stream #0:2 by changing map 0:X.

  


  ffmpeg -i output_master.mkv -c copy -allow_raw_vfw 1 -map 0:0 temp_0.mkv 


  


  To extract the configuration file from the video and store them in calibration.json, I am using the command below :

  


  ffmpeg -dump_attachment:3 calibration.json -i output_master.mkv


  


  To combine the streams with configuration file using FFmpeg, I am using the command below :

  


  ffmpeg -i temp_0.mkv -i temp_1.mkv -i temp_2.mkv -c copy -map 0:0 -map 1:0 -map 2:0 -allow_raw_vfw 1 -attach calibration.json -metadata:s:3 mimetype=application/octet-stream out.mkv


  


  Reconstrcuted Stream Info :

  


    Could not find codec parameters for stream 3 (Attachment: none): unknown codec
  Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options

  Input #0, matroska,webm, from '.\out.mkv':
  Metadata:
  title           : Azure Kinect
  K4A_COLOR_FIRMWARE_VERSION: 1.6.110
  K4A_DEPTH_FIRMWARE_VERSION: 1.6.79
  K4A_DEVICE_SERIAL_NUMBER: 000123102712
  K4A_START_OFFSET_NS: 298800000
  K4A_DEPTH_DELAY_NS: 0
  K4A_WIRED_SYNC_MODE: MASTER
  ENCODER         : Lavf60.3.100
  Duration: 00:00:40.06, start: 0.000000, bitrate: 480559 kb/s

  Stream #0:0(eng): Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 2048x1536, SAR 1:1 DAR 4:3, 30 fps, 30 tbr, 1k tbn (default)
  Metadata:
  title           : COLOR
  K4A_COLOR_TRACK : 14499183330009048
  K4A_COLOR_MODE  : MJPG_1536P
  DURATION        : 00:00:40.029000000

  Stream #0:1(eng): Video: rawvideo, rgb555le, 640x576, SAR 1:1 DAR 10:9, 30 fps, 30 tbr, 1k tbn (default)
  Metadata:
  title           : DEPTH
  K4A_DEPTH_TRACK : 429408169412322196
  K4A_DEPTH_MODE  : NFOV_UNBINNED
  DURATION        : 00:00:40.062000000

  Stream #0:2(eng): Video: rawvideo, rgb555le, 640x576, SAR 1:1 DAR 10:9, 30 fps, 30 tbr, 1k tbn (default)
  Metadata:
  title           : IR
  K4A_IR_TRACK    : 194324406376800992
  K4A_IR_MODE     : ACTIVE
  DURATION        : 00:00:40.062000000

  Stream #0:3: Attachment: none
  Metadata:
  filename        : calibration.json
  mimetype        : application/octet-stream


  


  However, I can not play the video on Azure Kinect Viewer, It displays failed to open recording.

  


  Any help would be appreciated.

  


• ffmpeg Output file #0 does not contain any stream during the extraction of audio from a .webm file

  17 mai 2023, par Leo

  my objective is to extract frames and corresponding audio from a .webm file.

  


  The problem comes when I am extracting the audio from the .webm file.

  


  When I try to extract the audio from the .webm. ffmpeg -i _5rNOD1nsDg.webm -vn -y -ar 44100 -ac 2 output.wav

  


  I get something like below and there is not any .wav file generated.
 ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 11 (Ubuntu 11.2.0-19ubuntu1) configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil      56. 70.100 / 56. 70.100 libavcodec     58.134.100 / 58.134.100 libavformat    58. 76.100 / 58. 76.100 libavdevice    58. 13.100 / 58. 13.100 libavfilter     7.110.100 /  7.110.100 libswscale      5.  9.100 /  5.  9.100 libswresample   3.  9.100 /  3.  9.100 libpostproc    55.  9.100 / 55.  9.100 Input #0, matroska,webm, from '_5rNOD1nsDg.webm': Metadata: encoder         : google/video-file Duration: 00:10:08.96, start: 0.000000, bitrate: 18219 kb/s Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 3840x2160, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn, 1k tbc (default) Output #0, wav, to 'output.wav': Output file #0 does not contain any stream

  


• ffmpeg add an audio to a video using apad, but duration not exactly same [closed]

  27 avril 2023, par Richard

  I am using ffmpeg to add an audio to a silent video, and the audio is shorter than the video, so I want to add silence to the end of the audio and make sure they have same duration. I use below command

  


  ffmpeg -i video.mp4 -i audio.mp3 -filter_complex "[1:0]apad" -c:v copy -shortest output.mp4


  


  but the output durations are not exactly the same

  


  

  1. Am I making any mistake here ?

  


  2. Is there a way to make them exactly same ?

  


  


  ffprobe -v error -show_entries stream=codec_type,duration,start_pts,start_time -sexagesimal output.mp4
[STREAM]
codec_type=audio
start_pts=0
start_time=0:00:00.000000
duration=0:00:03.621995
[/STREAM]
[STREAM]
codec_type=video
start_pts=0
start_time=0:00:00.000000
duration=0:00:03.640000
[/STREAM]


  


  input file info

  


  ▶ ffmpeg -i video.mp4                                                                                   
ffmpeg version 4.4-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.76.100
  Duration: 00:00:03.64, start: 0.000000, bitrate: 394 kb/s
  Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1080x1920, 390 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]


▶ ffmpeg  -i audio.mp3                                                                                     
ffmpeg version 4.4-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, mp3, from 'audio.mp3':
  Metadata:
    TCM             : A
    TT1             : xxx
    title           : yyy
    encoded_by      : ProTranscoderTool (Apple MP3 v1
  Duration: 00:00:02.77, start: 0.000000, bitrate: 271 kb/s
  Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 265 kb/s