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• Audio video duration matching for infinite dash loop pseudo live

  19 janvier 2020, par Massimo Vantaggio

  May I ask help to understand how to match audio and video duration during ffmpeg encoding for a concatenation of videos destined to an infinite loop mpeg dash transmission (mp4box).

  My issue happen during ffmpeg encoding :

  first step for audio encoding and timebase uniformity of each video before the concat/encode process :

  ffmpeg -y -i "$f" -c copy -video_track_timescale 90k -c:a aac -b:a 384k -ar 44100 -ac 2 -shortest -af aresample=async=1 ../buffer/${NAME}_buffer.mp4

  Then concat/encode process in order to get total duration in seconds multiple of closed GOP
  for example : cutting 373.5 duration to obtain 372.000 duration :

  ffmpeg -f concat -safe 0 -y -i list.txt -loop 1 -i ../logo/logo.png -c:a copy -c:v libx264 -x264opts keyint=$GOP:min-keyint=$GOP:no-scenecut -bf 0 -r $FPSC -b:v 4800k -maxrate 9600k -bufsize 19200k -profile:v main -crf 22 -filter_complex "[0:v][1:v]overlay=main_w-overlay_w-10:10,scale=1920:1080,setsar=1" -t $TOTDUR 1080set.mp4 

  the result

  VIDEO FORMAT CONTAINER DURATION:
  
  372.000000
  
  VIDEO STREAM DURATION:
  
  372.000000
  
  AUDIO FORMAT CONTAINER DURATION:
  
  372.006000

  I need help to understand why the audio duration counts 6 ms more than video duration and how to fix it.
  I read about loop_stream should help ?
  Thanks a lot !

  Below the videos info :

  Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isomavc1
  
      creation_time   : 2007-05-09T07:55:25.000000Z
  
    Duration: 00:01:29.22, start: 0.000000, bitrate: 7490 kb/s
  
      Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1920x816, 7403 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2007-05-09T07:55:25.000000Z
  
        handler_name    : GPAC ISO Video Handler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 94 kb/s (default)
  
      Metadata:
  
        creation_time   : 2007-05-09T07:55:29.000000Z
  
        handler_name    : GPAC ISO Audio Handler
  
  
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 1
  
      compatible_brands: isomavc1
  
      creation_time   : 2007-07-17T09:18:37.000000Z
  
      genre           : Trailer
  
      artist          : Fox
  
      title           : The Simpsons Movie
  
      date            : 2007
  
    Duration: 00:02:17.25, start: 0.000000, bitrate: 8591 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x800, 8486 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2007-07-17T09:18:37.000000Z
  
        handler_name    : GPAC ISO Video Handler
  
      Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, 5.1, fltp, 107 kb/s (default)
  
      Metadata:
  
        creation_time   : 2007-07-17T09:18:45.000000Z
  
        handler_name    : GPAC ISO Audio Handler
  
      Stream #0:2: Video: mjpeg (Progressive), yuvj420p(pc, bt470bg/unknown/unknown), 101x150 [SAR 72:72 DAR 101:150], 90k tbr, 90k tbn, 90k tbc (attached pic)
  
  
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 0
  
      compatible_brands: mp42isomavc1
  
      creation_time   : 2013-12-01T03:59:56.000000Z
  
      genre           : Trailer
  
      artist          : Warner Bros.
  
      title           : Gravity - 2K Trailer
  
      encoder         : HandBrake 0.9.9 2013051800
  
      date            : 2013
  
    Duration: 00:02:27.07, start: 0.000000, bitrate: 20296 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 2048x858, 20149 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
  
      Metadata:
  
        creation_time   : 2013-12-01T03:59:56.000000Z
  
        encoder         : JVT/AVC Coding
  
      Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 153 kb/s (default)
  
      Metadata:
  
        creation_time   : 2013-12-01T03:59:56.000000Z
  
      Stream #0:2: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 102x150 [SAR 72:72 DAR 17:25], 90k tbr, 90k tbn, 90k tbc (attached pic)

• H264 ByteStream to Image Files

  10 février 2020, par Tzah Mazuz

  first time here so be gentle.

  I’ve been working for a few weeks on a given H.264 byte stream :

  General notes :

  1. The Byte Stream is not from a file, it is being fed live to me from an external source.
  2. The Byte Stream is encoded with Android’s Media Codec.
  3. When writing the stream into a file with a .H264 extension, VLC is able to play it properly.

  What I’m trying to achieve ? One of the following :

  1. Converting the frames of the H264 stream to a saveable picture file (png/jpeg etc’)

  2. Converting the H264 raw bytes into a MP4 stream that can be played as source by a browser.

  I tried already using JavaCV (FFmpegFrameGrabber) without any success, my main problem is that i have no idea how to parse the byte stream or what each "packet" means

  So, I’ve attached a text file with some of the packets I’m getting from the stream
  H264 Packets

• FFMPEG profile-level-id size is invalid

  18 février 2020, par Mulham Aryan

  I’m trying to record a RTSP streaming from JVC KY-PZ 100.
  So for that i’m using ffmpeg with some parameters like segmentation, hls, ts, m3u8 etc ...
  i’m always getting an error The profile-level-id field size is invalid (41) and Error parsing AU headers

  This is the output of FFPROBE to debug the RTSP

  ffprobe -loglevel verbose  -i rtsp://jvc:0000@192.168.0.124:554/stream
  
  
  
  ffprobe version 4.2.2 Copyright (c) 2007-2019 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 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.0.1.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-13.0.1.jdk/Contents/Home/include/darwin' --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-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
  
  [tcp @ 0x7fa99ee001c0] Starting connection attempt to 192.168.0.124 port 554
  
  [tcp @ 0x7fa99ee001c0] Successfully connected to 192.168.0.124 port 554
  
  [rtsp @ 0x7fa99f807200] SDP:
  
  v=0
  
  o=- 1581949225269357 1 IN IP4 192.168.0.124
  
  s=KY-PZ100
  
  i=KY-PZ100
  
  t=0 0
  
  a=tool:LIVE555 Streaming Media v2013.10.03
  
  a=type:broadcast
  
  a=control:*
  
  a=range:npt=0-
  
  a=x-qt-text-nam:KY-PZ100
  
  a=x-qt-text-inf:KY-PZ100
  
  m=audio 0 RTP/AVP 96
  
  c=IN IP4 0.0.0.0
  
  b=AS:96
  
  a=rtpmap:96 mpeg4-generic/48000/2
  
  a=fmtp:96 streamtype=5;profile-level-id=41;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1190
  
  a=control:track1
  
  m=video 0 RTP/AVP 97
  
  c=IN IP4 0.0.0.0
  
  b=AS:1500
  
  a=rtpmap:97 H264/90000
  
  a=fmtp:97 packetization-mode=1;profile-level-id=4D401E;sprop-parameter-sets=Z01AHqtgUBf8uAqQEBAUAAAPpAADqYOlABksDcoUQDuLFIs=,aM48gA==
  
  a=control:track2
  
  
  
  [rtsp @ 0x7fa99f807200] The profile-level-id field size is invalid (41)
  
  [rtsp @ 0x7fa99f807200] setting jitter buffer size to 500
  
      Last message repeated 1 times
  
  [rtsp @ 0x7fa99f807200] Error parsing AU headers
  
      Last message repeated 4 times
  
  [h264 @ 0x7fa9a0806600] Reinit context to 640x368, pix_fmt: yuv420p
  
  [rtsp @ 0x7fa99f807200] Error parsing AU headers
  
      Last message repeated 235 times
  
  [rtsp @ 0x7fa99f807200] max_analyze_duration 5000000 reached at 5005000 microseconds st:1
  
  Input #0, rtsp, from 'rtsp://jvc:0000@192.168.0.124:554/stream':
  
    Metadata:
  
      title           : KY-PZ100
  
      comment         : KY-PZ100
  
    Duration: N/A, start: 0.066733, bitrate: N/A
  
      Stream #0:0: Audio: aac, 48000 Hz, stereo, fltp
  
      Stream #0:1: Video: h264 (Main), 1 reference frame, yuv420p(tv, bt709, progressive, left), 640x360 (640x368) [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc