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• Fixing A/V sync issues with RTP/RTCP sent from mediasoup

  10 décembre 2017, par artushin

  A little background : I’m attempting to record a webrtc call being made through the mediasoup v2 SFU. I’m using mediasoup’s room.createRtpStreamer() method to generate a stream which mirrors RTP/RTCP to ffmpeg. Two streamers are created for audio and video within 30ms of each other and begin broadcasting. FFmpeg then spins up and starts accepting. Pretty sure RTCP is working since ffmpeg is always starting with a keyframe despite being started after the streamer begins broadcasting.

  The problem is that I encounter audio/video desynchronization with seemingly random offsets. My current theory is that this offset is based on how old the last keyframe is that RTCP requests to start the stream. See below for ffmpeg configuration and output but my question is : what ffmpeg arguments can I use to adjust the video frame timestamps to match the audio frame timestamps or vice versa ? I’ve messed around with -map 0:0,0:1 -map 0:1,0:1 but it doesn’t seem to do what I’m looking for.

  ffmpeg flags :

  '-y',
  
  '-loglevel',
  
  'debug',
  
  '-dump',
  
  '-protocol_whitelist',
  
  'file,crypto,udp,rtp,data',
  
  '-analyzeduration',
  
  '20M',
  
  '-probesize',
  
  '20M',
  
  '-i',
  
  `data:text/plain;base64,${sdp.toString('base64')}`,
  
  '-fflags',
  
  '+genpts',
  
  '-vcodec',
  
  'copy',
  
  '-acodec',
  
  'aac',
  
  '-bsf:v',
  
  'h264_mp4toannexb',
  
  '-start_number',
  
  '0',
  
  '-hls_list_size',
  
  '2147480000',
  
  '-hls_wrap',
  
  '0',
  
  '-hls_time',
  
  '10',

  SDP used for input (template) :

  v=0
  
  o=- 0 0 IN IP4 <%=ip %>
  
  s=title
  
  c=IN IP4 <%=ip %>
  
  m=audio <%=audioPort %> RTP/AVPF <%=audioPayload %>
  
  a=sendrecv
  
  a=rtcp-mux
  
  a=rtpmap:<%=audioPayload %> opus/48000/2
  
  a=fmtp:<%=audioPayload %> minptime=10; useinbandfec=1
  
  m=video <%=videoPort %> RTP/AVPF <%=videoPayload %>
  
  a=sendrecv
  
  a=rtcp-mux
  
  a=rtpmap:<%=videoPayload %> H264/90000
  
  a=rtcp-fb:<%=videoPayload %> ccm fir
  
  a=rtcp-fb:<%=videoPayload %> nack
  
  a=rtcp-fb:<%=videoPayload %> nack pli
  
  a=rtcp-fb:<%=videoPayload %> goog-remb
  
  a=rtcp-fb:<%=videoPayload %> transport-cc
  
  a=fmtp:<%=videoPayload %> level-asymmetry-allowed=1;packetization-mode=1

  ffmpeg output - garbled with some timestamps

  1512775954585 - stderr: ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.38)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-libmp3lame --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
  1512775954587 - stderr:   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
  
  1512775954587 - stderr:   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
  
  Splitting the commandline.
  
  Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
  
  Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
  
  Reading option '-dump' ... matched as option 'dump' (dump each input packet) with argument '1'.
  
  Reading option '-protocol_whitelist' ...1512775954589 - stderr:  matched as AVOption 'protocol_whitelist' with argument 'file,crypto,udp,rtp,data'.
  
  Reading option '-analyzeduration' ...1512775954590 - stderr:  matched as AVOption 'analyzeduration' with argument '20M'.
  
  Reading option '-probesize' ...1512775954590 - stderr:  matched as AVOption 'probesize' with argument '20M'.
  
  Reading option '-i' ... matched as input url with argument 'data:text/plain;base64,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'.
  
  Reading option '-fflags' ...1512775954591 - stderr:  matched as AVOption 'fflags' with argument '+genpts'.
  
  Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'copy'.
  
  Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'aac'.
  
  Reading option '-vsync' ... matched as option 'vsync' (video sync method) with argument '0'.
  
  Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:0,0:1'.
  
  Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:1,0:1'.
  
  Reading option '-bsf:v' ... matched as option 'bsf' (A comma-separated list of bitstream filters) with argument 'h264_mp4toannexb'.
  
  Reading option '-start_number' ...1512775954591 - stderr:  matched as AVOption 'start_number' with argument '0'.
  
  Reading option '-hls_list_size' ...1512775954591 - stderr:  matched as AVOption 'hls_list_size' with argument '2147480000'.
  
  Reading option '-hls_wrap' ... matched as AVOption 'hls_wrap' with argument '0'.
  
  Reading option '-hls_time' ...1512775954591 - stderr:  matched as AVOption 'hls_time' with argument '10'.
  
  Reading option '/tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8' ... matched as output url.
  
  Finished splitting the commandline.
  
  Parsing a group of options: global .
  
  Applying option y (overwrite output files) with argument 1.
  
  1512775954592 - stderr: Applying option loglevel (set logging level) with argument debug.
  
  Applying option dump (dump each input packet) with argument 1.
  
  Applying option vsync (video sync method) with argument 0.
  
  Successfully parsed a group of options.
  
  Parsing a group of options: input url data:text/plain;base64,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.
  
  Successfully parsed a group of options.
  
  Opening an input file: data:text/plain;base64,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.
  
  1512775954592 - stderr: [NULL @ 0x7f81fd000000] Opening 'data:text/plain;base64,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' for reading
  
  1512775954593 - stderr: [data @ 0x7f81fca001a0] Content-type: text/plain
  
  {"level":"info","time":"Dec 8, 2017 11:32 PM","message":"ffmpeg started"}
  
  1512775954595 - stderr: [sdp @ 0x7f81fd000000] Format sdp probed with size=2048 and score=50
  
  1512775954598 - stderr: [sdp @ 0x7f81fd000000] audio codec set to: opus
  
  [sdp @ 0x7f81fd000000] audio samplerate set to: 48000
  
  [sdp @ 0x7f81fd000000] audio channels set to: 2
  
  1512775954639 - stderr: [sdp @ 0x7f81fd000000] video codec set to: h264
  
  [sdp @ 0x7f81fd000000] RTP Packetization Mode: 1
  
  [sdp @ 0x7f81fd000000] RTP Profile IDC: 42 Profile IOP: e0 Level: 1f
  
  [udp @ 0x7f81fcb007e0] end receive buffer size reported is 65536
  
  [udp @ 0x7f81fbe00180] end receive buffer size reported is 65536
  
  [sdp @ 0x7f81fd000000] setting jitter buffer size to 500
  
  [udp @ 0x7f81fbe00680] end receive buffer size reported is 65536
  
  [udp @ 0x7f81fbe00740] end receive buffer size reported is 65536
  
  [sdp @ 0x7f81fd000000] setting jitter buffer size to 500
  
  [sdp @ 0x7f81fd000000] Before avformat_find_stream_info() pos: 479 bytes read:479 seeks:0 nb_streams:2
  
  {"level":"info","time":"Dec 8, 2017 11:32 PM","message":"new active speaker","activePeer":"9f05d96a-9641-4c63-8f0e-486b98e48eb5"}
  
  1512775954773 - stderr: [AVBSFContext @ 0x7f81fc8018e0] nal_unit_type: 7, nal_ref_idc: 3
  
  [AVBSFContext @ 0x7f81fc8018e0] nal_unit_type: 8, nal_ref_idc: 3
  
  [AVBSFContext @ 0x7f81fc8018e0] nal_unit_type: 5, nal_ref_idc: 3
  
  1512775954774 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 7, nal_ref_idc: 3
  
  1512775954774 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 8, nal_ref_idc: 3
  
  1512775954774 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 5, nal_ref_idc: 3
  
  1512775954774 - stderr: [h264 @ 0x7f8200000c00] Reinit context to 640x480, pix_fmt: yuv420p
  
  1512775954801 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 1, nal_ref_idc: 3
  
  1512775954939 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 7, nal_ref_idc: 3
  
  1512775954939 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 8, nal_ref_idc: 3
  
  1512775954940 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 5, nal_ref_idc: 3
  
  1512775955003 - stderr: [h264 @ 0x7f8200000c00] nal_unit_type: 1, nal_ref_idc: 3
  
  1512775955999 - stderr:     Last message repeated 3 times
  
  [sdp @ 0x7f81fd000000] All info found
  
  1512775955999 - stderr: [sdp @ 0x7f81fd000000] rfps: 29.750000 0.019566
  
  [sdp @ 0x7f81fd000000] rfps: 29.833333 0.015263
  
  [sdp @ 0x7f81fd000000] rfps: 29.916667 0.011503
  
  1512775955999 - stderr: [sdp @ 0x7f81fd000000] rfps: 30.000000 0.008285
  
  [sdp @ 0x7f81fd000000] rfps: 31.000000 0.011990
  
      Last message repeated 1 times
  
  [sdp @ 0x7f81fd000000] rfps: 29.970030 0.009380
  
  [sdp @ 0x7f81fd000000] After avformat_find_stream_info() pos: 479 bytes read:479 seeks:0 frames:98
  
  1512775956000 - stderr: Input #0, sdp, from 'data:text/plain;base64,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':
  
  1512775956000 - stderr:   Metadata:
  
      title           : e0c92fa0-dad5-11e7-8687-090dda95b1a4 fooboar
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0, 70, 1/48000: Audio: opus, 48000 Hz, stereo, fltp1512775956000 - stderr:
  
      Stream #0:1, 28, 1/90000: Video: h264 (Constrained Baseline), 1 reference frame, yuv420p(progressive, left), 640x480, 0/1, 30 tbr, 90k tbn, 180k tbc
  
  1512775956000 - stderr: Successfully opened the file.
  
  Parsing a group of options: output url /tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8.
  
  Applying option vcodec (force video codec ('copy' to copy stream)) with argument copy.
  
  Applying option acodec (force audio codec ('copy' to copy stream)) with argument aac.
  
  Applying option map (set input stream mapping) with argument 0:0,0:1.
  
  Applying option map (set input stream mapping) with argument 0:1,0:1.
  
  Applying option bsf:v (A comma-separated list of bitstream filters) with argument h264_mp4toannexb.
  
  Successfully parsed a group of options.
  
  1512775956000 - stderr: Opening an output file: /tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8.
  
  1512775956000 - stderr: Successfully opened the file.
  
  1512775956001 - stderr: [AVBSFContext @ 0x7f81fcb020a0] The input looks like it is Annex B already
  
  Stream mapping:
  
  1512775956001 - stderr:   Stream #0:0 -> #0:0 [sync #0:1] (opus (native) -> aac (native))
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.000  pts=0.000
  
    size=82
  
  1512775956001 - stderr: [SWR @ 0x7f820001e600] Using fltp internally between filters
  
  1512775956002 - stderr: detected 8 logical cores
  
  1512775956003 - stderr: [graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'time_base' to value '1/48000'
  
  [graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'sample_rate' to value '48000'
  
  1512775956003 - stderr: [graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'sample_fmt' to value 'fltp'
  
  [graph_0_in_0_0 @ 0x7f81fc90dfc0] Setting 'channel_layout' to value '0x3'
  
  [graph_0_in_0_0 @ 0x7f81fc90dfc0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
  
  [format_out_0_0 @ 0x7f81fc914da0] Setting 'sample_fmts' to value 'fltp'
  
  [format_out_0_0 @ 0x7f81fc914da0] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
  
  1512775956004 - stderr: [AVFilterGraph @ 0x7f81fbd02200] query_formats: 4 queried, 9 merged, 0 already done, 0 delayed
  
  1512775956007 - stderr: [hls @ 0x7f81fd80f000] Opening '/tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/15127759544650.ts' for writing
  
  [file @ 0x7f81fbf01ee0] Setting default whitelist 'file,crypto'
  
  1512775956007 - stderr: [mpegts @ 0x7f81fd877800] muxrate VBR, pcr every 9000 pkts, sdt every 2147483647, pat/pmt every 2147483647 pkts
  
  Output #0, hls, to '/tmp/archive/e0c92fa0-dad5-11e7-8687-090dda95b1a4_10e1c990-dc70-11e7-888d-9f39ca0c79bc/1512775954465.m3u8':
  
    Metadata:
  
      title           : e0c92fa0-dad5-11e7-8687-090dda95b1a4 fooboar
  
      encoder         : Lavf57.83.100
  
  1512775956007 - stderr:     Stream #0:0, 0, 1/90000: Audio: aac (LC), 48000 Hz, stereo, fltp, delay 1024, 128 kb/s
  
      Metadata:
  
        encoder         : Lavc57.107.100 aac
  
      Stream #0:1, 0, 1/90000: Video: h264 (Constrained Baseline), 1 reference frame, yuv420p(progressive, left), 640x480 (0x0), 0/1, q=2-31, 30 tbr, 90k tbn, 90k tbc
  
  cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  1512775956007 - stderr:     Last message repeated 1 times
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.020  pts=0.020
  
    size=79
  
  1512775956007 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
      Last message repeated 1 times
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
  1512775956007 - stderr:   dts=0.040  pts=0.040
  
    size=75
  
  1512775956014 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.0601512775956014 - stderr:   pts=0.060
  
    size=81
  
  1512775956017 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.080  pts=0.080
  
    size=76
  
  1512775956022 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.1001512775956022 - stderr:   pts=0.100
  
    size=79
  
  1512775956023 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  stream #0:
  
    keyframe=1
  
  1512775956023 - stderr:   duration=0.000
  
    dts=0.120  pts=0.120
  
    size=95
  
  1512775956024 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  1512775956024 - stderr: stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.140  pts=0.140
  
    size=93
  
  1512775956025 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  stream #0:
  
    keyframe=1
  
  1512775956025 - stderr:   duration=0.000
  
    dts=0.160  pts=0.160
  
    size=94
  
  1512775956026 - stderr: cur_dts is invalid (this is harmless if it occurs once at the start per stream)
  
  stream #1:
  
    keyframe=1
  
  1512775956026 - stderr:   duration=0.000
  
    dts=N/A  pts=N/A
  
    size=992
  
  [hls @ 0x7f81fd80f000] Timestamps are unset in a packet for stream 1. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly
  
  1512775956026 - stderr: stream #0:
  
    keyframe=1
  
    duration=0.000
  
  1512775956026 - stderr:   dts=0.180  pts=0.180
  
    size=108
  
  1512775956027 - stderr: stream #1:
  
    keyframe=0
  
    duration=0.000
  
  1512775956027 - stderr:   dts=0.002  pts=0.002
  
    size=3047
  
  [hls @ 0x7f81fd80f000] pkt->duration = 0, maybe the hls segment duration will not precise
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.200  pts=0.200
  
    size=89
  
  1512775956060 - stderr: stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.220  pts=0.220
  
    size=73
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.240  pts=0.240
  
    size=78
  
  stream #0:
  
    keyframe=1
  
    duration=0.000
  
    dts=0.260  pts=0.260

  Notice how the first frame for stream #1 (video) starts after a number of audio frames ? Specifically, it starts at stream #0 dts/pts 0.18. In this situation, the a/v sync issue is pretty much unnoticeable, but with a bunch of repros, I’ve determined that the a/v sync offset is always the duration of however long audio frames were sent before the first video frame (sometimes seconds). I’m consistently starting the RTP streams only tens of ms apart, so I can’t control for this variance on the input side.

  After the initial audio frames come in, the first video frame has a dts/pts around 0. What ffmpeg setting would I use to adjust the timestamps accordingly ? I don’t care about losing the starting audio that doesn’t have video, so any solution that would adjust the timestamps works.

• How to add chapters into mp4/mkv file using ffmpeg ?

  28 août 2018, par Alex Zubkov

  Currently i’m using MKVToolNix for my needs which is fine but i would prefer some CLI also.
  As far as i know ffmpeg supports chapters management.

• How to get .mp4 videos from motion on a Raspberry Pi ?

  3 novembre 2017, par Maarti

  I use motion on my laptop and it works perfectly in any format. But when I use it on my Raspberry Pi 3 (Raspbian Jessie) with the Raspberry Camera V2, the only formats that work are : .avi and .swf.

  When I choose any other format, the output video is a "0 sec video" that is played and closed instantly.

  I would like to have .mp4 or .ogg output so I can read it easily with HTML5.

  Here is the motion codec documentation.

  Here is my config file :

  ############################################################
  
  # Daemon
  
  ############################################################
  
  
  
  # Start in daemon (background) mode and release terminal (default: off)
  
  daemon on
  
  
  
  # File to store the process ID, also called pid file. (default: not defined)
  
  process_id_file /var/run/motion/motion.pid
  
  
  
  ############################################################
  
  # Basic Setup Mode
  
  ############################################################
  
  
  
  # Start in Setup-Mode, daemon disabled. (default: off)
  
  setup_mode off
  
  
  
  
  
  # Use a file to save logs messages, if not defined stderr and syslog is used. (default: not defined)
  
  #logfile /mnt/camshare/Cam1/motion.log
  
  logfile /tmp/motion.log
  
  
  
  # Level of log messages [1..9] (EMR, ALR, CRT, ERR, WRN, NTC, INF, DBG, ALL). (default: 6 / NTC)
  
  log_level 2
  
  
  
  # Filter to log messages by type (COR, STR, ENC, NET, DBL, EVT, TRK, VID, ALL). (default: ALL)
  
  log_type all
  
  
  
  ###########################################################
  
  # Capture device options
  
  ############################################################
  
  
  
  # Videodevice to be used for capturing  (default /dev/video0)
  
  # for FreeBSD default is /dev/bktr0
  
  #videodevice /dev/video0
  
  
  
  # v4l2_palette allows to choose preferable palette to be use by motion
  
  # to capture from those supported by your videodevice. (default: 17)
  
  # E.g. if your videodevice supports both V4L2_PIX_FMT_SBGGR8 and
  
  # V4L2_PIX_FMT_MJPEG then motion will by default use V4L2_PIX_FMT_MJPEG.
  
  # Setting v4l2_palette to 2 forces motion to use V4L2_PIX_FMT_SBGGR8
  
  # instead.
  
  #
  
  # Values :
  
  # V4L2_PIX_FMT_SN9C10X : 0  'S910'
  
  # V4L2_PIX_FMT_SBGGR16 : 1  'BYR2'
  
  # V4L2_PIX_FMT_SBGGR8  : 2  'BA81'
  
  # V4L2_PIX_FMT_SPCA561 : 3  'S561'
  
  # V4L2_PIX_FMT_SGBRG8  : 4  'GBRG'
  
  # V4L2_PIX_FMT_SGRBG8  : 5  'GRBG'
  
  # V4L2_PIX_FMT_PAC207  : 6  'P207'
  
  # V4L2_PIX_FMT_PJPG    : 7  'PJPG'
  
  # V4L2_PIX_FMT_MJPEG   : 8  'MJPEG'
  
  # V4L2_PIX_FMT_JPEG    : 9  'JPEG'
  
  # V4L2_PIX_FMT_RGB24   : 10 'RGB3'
  
  # V4L2_PIX_FMT_SPCA501 : 11 'S501'
  
  # V4L2_PIX_FMT_SPCA505 : 12 'S505'
  
  # V4L2_PIX_FMT_SPCA508 : 13 'S508'
  
  # V4L2_PIX_FMT_UYVY    : 14 'UYVY'
  
  # V4L2_PIX_FMT_YUYV    : 15 'YUYV'
  
  # V4L2_PIX_FMT_YUV422P : 16 '422P'
  
  # V4L2_PIX_FMT_YUV420  : 17 'YU12'
  
  #
  
  v4l2_palette 7
  
  
  
  # Tuner device to be used for capturing using tuner as source (default /dev/tuner0)
  
  # This is ONLY used for FreeBSD. Leave it commented out for Linux
  
  ; tunerdevice /dev/tuner0
  
  
  
  # The video input to be used (default: -1)
  
  # Should normally be set to 0 or 1 for video/TV cards, and -1 for USB cameras
  
  input -1
  
  
  
  # The video norm to use (only for video capture and TV tuner cards)
  
  # Values: 0 (PAL), 1 (NTSC), 2 (SECAM), 3 (PAL NC no colour). Default: 0 (PAL)
  
  norm 0
  
  
  
  # The frequency to set the tuner to (kHz) (only for TV tuner cards) (default: 0)
  
  frequency 0
  
  
  
  # Rotate image this number of degrees. The rotation affects all saved images as
  
  # well as movies. Valid values: 0 (default = no rotation), 90, 180 and 270.
  
  rotate 0
  
  
  
  # Image width (pixels). Valid range: Camera dependent, default: 352
  
  #width 1024
  
  width 640
  
  
  
  # Image height (pixels). Valid range: Camera dependent, default: 288
  
  #height 576
  
  height 480
  
  
  
  # Maximum number of frames to be captured per second.
  
  # Valid range: 2-100. Default: 100 (almost no limit).
  
  framerate 15
  
  
  
  # Minimum time in seconds between capturing picture frames from the camera.
  
  # Default: 0 = disabled - the capture rate is given by the camera framerate.
  
  # This option is used when you want to capture images at a rate lower than 2 per second.
  
  minimum_frame_time 0
  
  
  
  # URL to use if you are using a network camera, size will be autodetected (incl http:// ftp:// mjpg:// or file:///)
  
  # Must be a URL that returns single jpeg pictures or a raw mjpeg stream. Default: Not defined
  
  ;netcam_url http://127.0.0.1/cgi-bin/raspicam.sh
  
  
  
  # Username and password for network camera (only if required). Default: not defined
  
  # Syntax is user:password
  
  ; netcam_userpass value
  
  
  
  # The setting for keep-alive of network socket, should improve performance on compatible net cameras.
  
  # off:   The historical implementation using HTTP/1.0, closing the socket after each http request.
  
  # force: Use HTTP/1.0 requests with keep alive header to reuse the same connection.
  
  # on:    Use HTTP/1.1 requests that support keep alive as default.
  
  # Default: off
  
  netcam_keepalive off
  
  
  
  # URL to use for a netcam proxy server, if required, e.g. "http://myproxy".
  
  # If a port number other than 80 is needed, use "http://myproxy:1234".
  
  # Default: not defined
  
  ; netcam_proxy value
  
  
  
  # Set less strict jpeg checks for network cameras with a poor/buggy firmware.
  
  # Default: off
  
  netcam_tolerant_check off
  
  
  
  # Let motion regulate the brightness of a video device (default: off).
  
  # The auto_brightness feature uses the brightness option as its target value.
  
  # If brightness is zero auto_brightness will adjust to average brightness value 128.
  
  # Only recommended for cameras without auto brightness
  
  auto_brightness off
  
  
  
  # Set the initial brightness of a video device.
  
  # If auto_brightness is enabled, this value defines the average brightness level
  
  # which Motion will try and adjust to.
  
  # Valid range 0-255, default 0 = disabled
  
  brightness 0
  
  
  
  # Set the contrast of a video device.
  
  # Valid range 0-255, default 0 = disabled
  
  contrast 0
  
  
  
  # Set the saturation of a video device.
  
  # Valid range 0-255, default 0 = disabled
  
  saturation 0
  
  
  
  # Set the hue of a video device (NTSC feature).
  
  # Valid range 0-255, default 0 = disabled
  
  hue 0
  
  
  
  ############################################################
  
  # File "camera" support - read raw YUV data from a file
  
  ############################################################
  
  #filecam_path /home/pi/test-cap/motion-mmal.capture
  
  
  
  ############################################################
  
  # OpenMax/MMAL camera support for Raspberry Pi
  
  ############################################################
  
  mmalcam_name vc.ril.camera
  
  #mmalcam_control_params
  
  #mmalcam_raw_capture_file /home/pi/motion-mmal.capture
  
  
  
  # Switch this setting to "on" to use the still image mode of the Pi's camera
  
  # instead of video. This gives a wider field of view, but requires
  
  # a much slower frame-rate to achieve exposure stability
  
  # (e.g. 0.25 fps or slower). You can use the minimum_frame_time
  
  # parameter above to achieve this
  
  
  
  mmalcam_use_still off
  
  
  
  
  
  ############################################################
  
  # Round Robin (multiple inputs on same video device name)
  
  ############################################################
  
  
  
  # Number of frames to capture in each roundrobin step (default: 1)
  
  roundrobin_frames 1
  
  
  
  # Number of frames to skip before each roundrobin step (default: 1)
  
  roundrobin_skip 1
  
  
  
  # Try to filter out noise generated by roundrobin (default: off)
  
  switchfilter off
  
  
  
  
  
  ############################################################
  
  # Motion Detection Settings:
  
  ############################################################
  
  
  
  # Threshold for number of changed pixels in an image that
  
  # triggers motion detection (default: 1500)
  
  threshold 1500
  
  
  
  # Automatically tune the threshold down if possible (default: off)
  
  threshold_tune off
  
  
  
  # Noise threshold for the motion detection (default: 32)
  
  noise_level 32
  
  
  
  # Automatically tune the noise threshold (default: on)
  
  noise_tune on
  
  
  
  # Despeckle motion image using (e)rode or (d)ilate or (l)abel (Default: not defined)
  
  # Recommended value is EedDl. Any combination (and number of) of E, e, d, and D is valid.
  
  # (l)abeling must only be used once and the 'l' must be the last letter.
  
  # Comment out to disable
  
  despeckle_filter EedDl
  
  
  
  # Detect motion in predefined areas (1 - 9). Areas are numbered like that:  1 2 3
  
  # A script (on_area_detected) is started immediately when motion is         4 5 6
  
  # detected in one of the given areas, but only once during an event.        7 8 9
  
  # One or more areas can be specified with this option. Take care: This option
  
  # does NOT restrict detection to these areas! (Default: not defined)
  
  ; area_detect value
  
  
  
  # PGM file to use as a sensitivity mask.
  
  # Full path name to. (Default: not defined)
  
  ; mask_file value
  
  
  
  # Dynamically create a mask file during operation (default: 0)
  
  # Adjust speed of mask changes from 0 (off) to 10 (fast)
  
  smart_mask_speed 0
  
  
  
  # Ignore sudden massive light intensity changes given as a percentage of the picture
  
  # area that changed intensity. Valid range: 0 - 100 , default: 0 = disabled
  
  lightswitch 0
  
  
  
  # Picture frames must contain motion at least the specified number of frames
  
  # in a row before they are detected as true motion. At the default of 1, all
  
  # motion is detected. Valid range: 1 to thousands, recommended 1-5
  
  minimum_motion_frames 1
  
  
  
  # Specifies the number of pre-captured (buffered) pictures from before motion
  
  # was detected that will be output at motion detection.
  
  # Recommended range: 0 to 5 (default: 0)
  
  # Do not use large values! Large values will cause Motion to skip video frames and
  
  # cause unsmooth movies. To smooth movies use larger values of post_capture instead.
  
  pre_capture 2
  
  
  
  # Number of frames to capture after motion is no longer detected (default: 0)
  
  post_capture 2
  
  
  
  # Event Gap is the seconds of no motion detection that triggers the end of an event.
  
  # An event is defined as a series of motion images taken within a short timeframe.
  
  # Recommended value is 60 seconds (Default). The value -1 is allowed and disables
  
  # events causing all Motion to be written to one single movie file and no pre_capture.
  
  # If set to 0, motion is running in gapless mode. Movies don't have gaps anymore. An
  
  # event ends right after no more motion is detected and post_capture is over.
  
  event_gap 60
  
  
  
  # Maximum length in seconds of an mpeg movie
  
  # When value is exceeded a new movie file is created. (Default: 0 = infinite)
  
  # ATTENTION: when you're not using the motion build from the tutorial, it might fail with error 'Unknown config option "max_mpeg_time"'
  
  # the use this line instead:
  
  # max_movie_time 60
  
  max_movie_time 60
  
  
  
  # Always save images even if there was no motion (default: off)
  
  emulate_motion off
  
  
  
  
  
  ############################################################
  
  # Image File Output
  
  ############################################################
  
  
  
  # Output 'normal' pictures when motion is detected (default: on)
  
  # Valid values: on, off, first, best, center
  
  # When set to 'first', only the first picture of an event is saved.
  
  # Picture with most motion of an event is saved when set to 'best'.
  
  # Picture with motion nearest center of picture is saved when set to 'center'.
  
  # Can be used as preview shot for the corresponding movie.
  
  output_pictures best
  
  
  
  # Output pictures with only the pixels moving object (ghost images) (default: off)
  
  output_debug_pictures off
  
  
  
  # The quality (in percent) to be used by the jpeg compression (default: 75)
  
  quality 75
  
  
  
  # Type of output images
  
  # Valid values: jpeg, ppm (default: jpeg)
  
  picture_type jpeg
  
  
  
  ############################################################
  
  # FFMPEG related options
  
  # Film (movies) file output, and deinterlacing of the video input
  
  # The options movie_filename and timelapse_filename are also used
  
  # by the ffmpeg feature
  
  ############################################################
  
  
  
  # Use ffmpeg to encode movies in realtime (default: off)
  
  ffmpeg_output_movies on
  
  
  
  # Use ffmpeg to make movies with only the pixels moving
  
  # object (ghost images) (default: off)
  
  ffmpeg_output_debug_movies off
  
  
  
  # Use ffmpeg to encode a timelapse movie
  
  # Default value 0 = off - else save frame every Nth second
  
  ffmpeg_timelapse 0
  
  
  
  # The file rollover mode of the timelapse video
  
  # Valid values: hourly, daily (default), weekly-sunday, weekly-monday, monthly, manual
  
  ffmpeg_timelapse_mode daily
  
  
  
  # Bitrate to be used by the ffmpeg encoder (default: 400000)
  
  # This option is ignored if ffmpeg_variable_bitrate is not 0 (disabled)
  
  ffmpeg_bps 500000
  
  
  
  # Enables and defines variable bitrate for the ffmpeg encoder.
  
  # ffmpeg_bps is ignored if variable bitrate is enabled.
  
  # Valid values: 0 (default) = fixed bitrate defined by ffmpeg_bps,
  
  # or the range 2 - 31 where 2 means best quality and 31 is worst.
  
  ffmpeg_variable_bitrate 5
  
  
  
  # Codec to used by ffmpeg for the video compression.
  
  # Timelapse mpegs are always made in mpeg1 format independent from this option.
  
  # Supported formats are: mpeg1 (ffmpeg-0.4.8 only), mpeg4 (default), and msmpeg4.
  
  # mpeg1 - gives you files with extension .mpg
  
  # mpeg4 or msmpeg4 - gives you files with extension .avi
  
  # msmpeg4 is recommended for use with Windows Media Player because
  
  # it requires no installation of codec on the Windows client.
  
  # swf - gives you a flash film with extension .swf
  
  # flv - gives you a flash video with extension .flv
  
  # ffv1 - FF video codec 1 for Lossless Encoding ( experimental )
  
  # mov - QuickTime ( testing )
  
  # ogg - Ogg/Theora ( testing )
  
  #ffmpeg_video_codec msmpeg4
  
  ffmpeg_video_codec mp4
  
  
  
  # Use ffmpeg to deinterlace video. Necessary if you use an analog camera
  
  # and see horizontal combing on moving objects in video or pictures.
  
  # (default: off)
  
  ffmpeg_deinterlace off
  
  
  
  ############################################################
  
  # SDL Window
  
  ############################################################
  
  
  
  # Number of motion thread to show in SDL Window (default: 0 = disabled)
  
  #sdl_threadnr 0
  
  
  
  ############################################################
  
  # External pipe to video encoder
  
  # Replacement for FFMPEG builtin encoder for ffmpeg_output_movies only.
  
  # The options movie_filename and timelapse_filename are also used
  
  # by the ffmpeg feature
  
  #############################################################
  
  
  
  # Bool to enable or disable extpipe (default: off)
  
  use_extpipe off
  
  
  
  # External program (full path and opts) to pipe raw video to
  
  # Generally, use '-' for STDIN...
  
  ;extpipe mencoder -demuxer rawvideo -rawvideo w=320:h=240:i420 -ovc x264 -x264encopts bframes=4:frameref=1:subq=1:scenecut=-1:nob_adapt:threads=1:keyint=1000:8x8dct:vbv_bufsize=4000:crf=24:partitions=i8x8,i4x4:vbv_maxrate=800:no-chroma-me -vf denoise3d=16:12:48:4,pp=lb -of   avi -o %f.avi - -fps %fps
  
  
  
  
  
  
  
  ############################################################
  
  # Snapshots (Traditional Periodic Webcam File Output)
  
  ############################################################
  
  
  
  # Make automated snapshot every N seconds (default: 0 = disabled)
  
  snapshot_interval 0
  
  
  
  
  
  ############################################################
  
  # Text Display
  
  # %Y = year, %m = month, %d = date,
  
  # %H = hour, %M = minute, %S = second, %T = HH:MM:SS,
  
  # %v = event, %q = frame number, %t = thread (camera) number,
  
  # %D = changed pixels, %N = noise level, \n = new line,
  
  # %i and %J = width and height of motion area,
  
  # %K and %L = X and Y coordinates of motion center
  
  # %C = value defined by text_event - do not use with text_event!
  
  # You can put quotation marks around the text to allow
  
  # leading spaces
  
  ############################################################
  
  
  
  # Locate and draw a box around the moving object.
  
  # Valid values: on, off, preview (default: off)
  
  # Set to 'preview' will only draw a box in preview_shot pictures.
  
  locate_motion_mode off
  
  
  
  # Set the look and style of the locate box if enabled.
  
  # Valid values: box, redbox, cross, redcross (default: box)
  
  # Set to 'box' will draw the traditional box.
  
  # Set to 'redbox' will draw a red box.
  
  # Set to 'cross' will draw a little cross to mark center.
  
  # Set to 'redcross' will draw a little red cross to mark center.
  
  locate_motion_style box
  
  
  
  # Draws the timestamp using same options as C function strftime(3)
  
  # Default: %Y-%m-%d\n%T = date in ISO format and time in 24 hour clock
  
  # Text is placed in lower right corner
  
  text_right %d.%m.%Y\n%T
  
  
  
  # Draw a user defined text on the images using same options as C function strftime(3)
  
  # Default: Not defined = no text
  
  # Text is placed in lower left corner
  
  ; text_left CAMERA %t
  
  text_left HofCam
  
  
  
  # Draw the number of changed pixed on the images (default: off)
  
  # Will normally be set to off except when you setup and adjust the motion settings
  
  # Text is placed in upper right corner
  
  text_changes off
  
  
  
  # This option defines the value of the special event conversion specifier %C
  
  # You can use any conversion specifier in this option except %C. Date and time
  
  # values are from the timestamp of the first image in the current event.
  
  # Default: %Y%m%d%H%M%S
  
  # The idea is that %C can be used filenames and text_left/right for creating
  
  # a unique identifier for each event.
  
  text_event %Y%m%d%H%M%S
  
  
  
  # Draw characters at twice normal size on images. (default: off)
  
  text_double on
  
  
  
  
  
  # Text to include in a JPEG EXIF comment
  
  # May be any text, including conversion specifiers.
  
  # The EXIF timestamp is included independent of this text.
  
  ;exif_text %i%J/%K%L
  
  
  
  ############################################################
  
  # Target Directories and filenames For Images And Films
  
  # For the options snapshot_, picture_, movie_ and timelapse_filename
  
  # you can use conversion specifiers
  
  # %Y = year, %m = month, %d = date,
  
  # %H = hour, %M = minute, %S = second,
  
  # %v = event, %q = frame number, %t = thread (camera) number,
  
  # %D = changed pixels, %N = noise level,
  
  # %i and %J = width and height of motion area,
  
  # %K and %L = X and Y coordinates of motion center
  
  # %C = value defined by text_event
  
  # Quotation marks round string are allowed.
  
  ############################################################
  
  
  
  # Target base directory for pictures and films
  
  # Recommended to use absolute path. (Default: current working directory)
  
  target_dir /home/pi
  
  
  
  # File path for snapshots (jpeg or ppm) relative to target_dir
  
  # Default: %v-%Y%m%d%H%M%S-snapshot
  
  # Default value is equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d/%H/%M/%S-snapshot
  
  # File extension .jpg or .ppm is automatically added so do not include this.
  
  # Note: A symbolic link called lastsnap.jpg created in the target_dir will always
  
  # point to the latest snapshot, unless snapshot_filename is exactly 'lastsnap'
  
  snapshot_filename %v-%Y%m%d%H%M%S-snapshot
  
  
  
  # File path for motion triggered images (jpeg or ppm) relative to target_dir
  
  # Default: %v-%Y%m%d%H%M%S-%q
  
  # Default value is equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d/%H/%M/%S-%q
  
  # File extension .jpg or .ppm is automatically added so do not include this
  
  # Set to 'preview' together with best-preview feature enables special naming
  
  # convention for preview shots. See motion guide for details
  
  picture_filename %v-%Y%m%d%H%M%S-%q
  
  
  
  # File path for motion triggered ffmpeg films (movies) relative to target_dir
  
  # Default: %v-%Y%m%d%H%M%S
  
  # Default value is equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d/%H%M%S
  
  # File extension .mpg or .avi is automatically added so do not include this
  
  # This option was previously called ffmpeg_filename
  
  movie_filename %v-%Y%m%d%H%M%S
  
  
  
  # File path for timelapse movies relative to target_dir
  
  # Default: %Y%m%d-timelapse
  
  # Default value is near equivalent to legacy oldlayout option
  
  # For Motion 3.0 compatible mode choose: %Y/%m/%d-timelapse
  
  # File extension .mpg is automatically added so do not include this
  
  timelapse_filename %Y%m%d-timelapse
  
  
  
  ############################################################
  
  # Global Network Options
  
  ############################################################
  
  # Enable or disable IPV6 for http control and stream (default: off )
  
  ipv6_enabled off
  
  
  
  ############################################################
  
  # Live Stream Server
  
  ############################################################
  
  
  
  # The mini-http server listens to this port for requests (default: 0 = disabled)
  
  stream_port 8080
  
  
  
  # Quality of the jpeg (in percent) images produced (default: 50)
  
  stream_quality 50
  
  
  
  # Output frames at 1 fps when no motion is detected and increase to the
  
  # rate given by stream_maxrate when motion is detected (default: off)
  
  stream_motion on
  
  
  
  # Maximum framerate for stream streams (default: 1)
  
  stream_maxrate 4
  
  
  
  # Restrict stream connections to localhost only (default: on)
  
  stream_localhost off
  
  
  
  # Limits the number of images per connection (default: 0 = unlimited)
  
  # Number can be defined by multiplying actual stream rate by desired number of seconds
  
  # Actual stream rate is the smallest of the numbers framerate and stream_maxrate
  
  stream_limit 0
  
  
  
  # Set the authentication method (default: 0)
  
  # 0 = disabled
  
  # 1 = Basic authentication
  
  # 2 = MD5 digest (the safer authentication)
  
  stream_auth_method 0
  
  
  
  # Authentication for the stream. Syntax username:password
  
  # Default: not defined (Disabled)
  
  ; stream_authentication username:password
  
  
  
  
  
  ############################################################
  
  # HTTP Based Control
  
  ############################################################
  
  
  
  # TCP/IP port for the http server to listen on (default: 0 = disabled)
  
  webcontrol_port 8081
  
  
  
  # Restrict control connections to localhost only (default: on)
  
  webcontrol_localhost off
  
  
  
  # Output for http server, select off to choose raw text plain (default: on)
  
  webcontrol_html_output on
  
  
  
  # Authentication for the http based control. Syntax username:password
  
  # Default: not defined (Disabled)
  
  ; webcontrol_authentication username:password
  
  
  
  
  
  ############################################################
  
  # Tracking (Pan/Tilt)
  
  #############################################################
  
  
  
  # Type of tracker (0=none (default), 1=stepper, 2=iomojo, 3=pwc, 4=generic, 5=uvcvideo, 6=servo)
  
  # The generic type enables the definition of motion center and motion size to
  
  # be used with the conversion specifiers for options like on_motion_detected
  
  track_type 0
  
  
  
  # Enable auto tracking (default: off)
  
  track_auto off
  
  
  
  # Serial port of motor (default: none)
  
  ;track_port /dev/ttyS0
  
  
  
  # Motor number for x-axis (default: 0)
  
  ;track_motorx 0
  
  
  
  # Set motorx reverse (default: 0)
  
  ;track_motorx_reverse 0
  
  
  
  # Motor number for y-axis (default: 0)
  
  ;track_motory 1
  
  
  
  # Set motory reverse (default: 0)
  
  ;track_motory_reverse 0
  
  
  
  # Maximum value on x-axis (default: 0)
  
  ;track_maxx 200
  
  
  
  # Minimum value on x-axis (default: 0)
  
  ;track_minx 50
  
  
  
  # Maximum value on y-axis (default: 0)
  
  ;track_maxy 200
  
  
  
  # Minimum value on y-axis (default: 0)
  
  ;track_miny 50
  
  
  
  # Center value on x-axis (default: 0)
  
  ;track_homex 128
  
  
  
  # Center value on y-axis (default: 0)
  
  ;track_homey 128
  
  
  
  # ID of an iomojo camera if used (default: 0)
  
  track_iomojo_id 0
  
  
  
  # Angle in degrees the camera moves per step on the X-axis
  
  # with auto-track (default: 10)
  
  # Currently only used with pwc type cameras
  
  track_step_angle_x 10
  
  
  
  [...]