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I have a video file that contains 4 streams, 3 videos streams and one steam for metadata.

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 this command to extract the first stream:

ffmpeg -i output_master.mkv -c copy  -map 0:v:0 out_1.mkv

For the other two streams, I am using this command:

ffmpeg -i output_master.mkv -c:v ffv1 -pix_fmt gray16be -allow_raw_vfw 1 -map 0:v:1 out_2.mkv
ffmpeg -i output_master.mkv -c:v ffv1 -pix_fmt gray16be -allow_raw_vfw 1 -map 0:v:2 out_3.mkv

I do not know if I am using the right commands to extracting the video streams.

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  • It seems that you extracted correct video streams (you may omit the v: part as the all 3 first streams are video streams). What's your problem?
    – MarianD
    Apr 23, 2023 at 4:08
  • When I am extracting the stream, the stream information gets changed for all the streams. For example, Original Stream #1 info: Stream #0:1(eng): Video: rawvideo (b16g / 0x67363162), gray16be....., and after extracting the stream, it changes to Stream #0:1(eng): Video: rawvideo, rgb555le, 640x576,... I do not want to change anything. Apr 23, 2023 at 12:38
  • It would be nice from you to append your comment directly to your question. The stream properties are changed because it will be transcoded (i.e. decoded and then encoded with ffv1 codec, as you specified in -c:v ffv1 option). Use -c:v copy instead, but without other options for changing the stream's properties.
    – MarianD
    Apr 23, 2023 at 22:17

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