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  • What does profile means in an aac encoded audio

    22 avril 2020, par Ananta Prodhan

    I am trying to concat two video files with ffmpeg concat demuxer for most of the part it works just fine !
But when I try to concat videos which has two different audio profile with same codec, it concats with the resulting video having weird sound problem. And when re-encoding the resulting video it will spit out a lots of error related to audio.

    



    Here is ffprobe output for some audio stream from different video files
Video 1

    



    [STREAM]
index=1
codec_name=aac
codec_long_name=unknown
profile=4
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
sample_fmt=fltp
...
[/STREAM]


    



    Video 2

    



    [STREAM]
index=1
codec_name=aac
codec_long_name=unknown
profile=1
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
sample_fmt=fltp
...
[/STREAM]


    



    Video 3

    



    [STREAM]
index=1
codec_name=aac
codec_long_name=unknown
profile=28
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
sample_fmt=fltp
...
[/STREAM]


    



    Look the different profile= values.I was able to reproduce 28 and 1 but was failed for 4

    



    28 = he_aac_v2 1 = ffmpeg default

    



    So what I want to know the most is, 
What does these different values mean for aac ? 
And how to reproduce them with any aac encode ?

    


  • avformat/movenc : add ICC profile support to colr atom

    23 septembre 2019, par vectronic
    avformat/movenc : add ICC profile support to colr atom

    If 'write_colr' movflag is set, then movflag 'prefer_icc' can
    
be used to first look for an AV_PKT_DATA_ICC_PROFILE entry to
    
encode.
    

    If ICC profile doesn't exist, default behaviour enabled by
    
'write_colr' occurs.
    

    Signed-off-by : vectronic <hello.vectronic@gmail.com>
    • [DH] libavformat/movenc.c
    • [DH] libavformat/movenc.h

  • 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

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