RTMP2RTC: Transcode AAC to Opus failed using GoPro Hero12 Black. about srs

[bencyjiang]

Stream from GoPro Hero12 Black using RTMP to an Nginx server, and then utilize FFmpeg to relay the stream to an SRS (Simple Real-time Streaming) server successfully.

ffmpeg -i rtmp://192.168.1.106:19350/live/abc -c copy -f flv rtmp://192.168.1.134:1935/live/abc

ffmpeg version 2021-08-01-git-1f58503013-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 10.3.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      57.  3.100 / 57.  3.100
  libavcodec     59.  3.102 / 59.  3.102
  libavformat    59.  4.101 / 59.  4.101
  libavdevice    59.  0.100 / 59.  0.100
  libavfilter     8.  1.103 /  8.  1.103
  libswscale      6.  0.100 /  6.  0.100
  libswresample   4.  0.100 /  4.  0.100
  libpostproc    56.  0.100 / 56.  0.100
Input #0, flv, from 'rtmp://192.168.1.106:19350/live/abc':
  Metadata:
    |RtmpSampleAccess: true
    Server          : NGINX HTTP-FLV (https://github.com/winshining/nginx-http-flv-module)
    displayWidth    : 1920
    displayHeight   : 1080
    fps             : 0
    profile         :
    level           :
  Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 2560 kb/s, 29.97 fps, 29.97 tbr, 1k tbn
  Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp, 131 kb/s
Output #0, flv, to 'rtmp://192.168.1.134:1935/live/abc':
  Metadata:
    |RtmpSampleAccess: true
    Server          : NGINX HTTP-FLV (https://github.com/winshining/nginx-http-flv-module)
    displayWidth    : 1920
    displayHeight   : 1080
    fps             : 0
    profile         :
    level           :
    encoder         : Lavf59.4.101
  Stream #0:0: Video: h264 (High) ([7][0][0][0] / 0x0007), yuvj420p(pc, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 2560 kb/s, 29.97 fps, 29.97 tbr, 1k tbn
  Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 48000 Hz, stereo, fltp, 131 kb/s

TRANS_BY_GPT4

[suzp1984]

Error happened when transcode AAC to opus, so the original media sources are need to help target the problem. You can recored the rtmp stream to video file by this cmd: (use the original rtmp stream, not the stream transformed by nginx-rtmp-module.

ffmpeg -i rtmp://your_srs_server/live/abc -c copy -f flv video.flv

Post the recorded video file here, then I can check whether this issue can be reproduced or not.

[bencyjiang]

@suzp1984
Disable the RTMP to WebRTC conversion, and use only RTMP.
ffmpeg -i rtmp://192.168.1.134:1935/live/abc -c copy -f flv video.flv

get file:

video.mp4

TRANS_BY_GPT4

[suzp1984]

@suzp1984 Disable the RTMP to WebRTC conversion, and use only RTMP. ffmpeg -i rtmp://192.168.1.134:1935/live/abc -c copy -f flv video.flv

get file:

video.mp4
TRANS_BY_GPT4

this video seems unable to download, above ffmpeg record a flv file, why this is a mp4 one.

[bencyjiang]

@suzp1984
I changed the file extension of "video.flv" to "video.mp4" because this platform does not allow the upload of FLV files. The original file is indeed a FLV file. I will send a compressed version of the file.
video.zip

TRANS_BY_GPT4

[suzp1984]

@suzp1984 I changed the file extension of "video.flv" to "video.mp4" because this platform does not allow the upload of FLV files. The original file is indeed a FLV file. I will send a compressed version of the file. video.zip

TRANS_BY_GPT4

I click the video.zip, it said Not found.
I once used 3rd cloud storage service like google drive to share.

[bencyjiang]

video.zip

@suzp1984

[suzp1984]

the video.zip can be download now, but I can't reproduce this problem by using the srs config at the top.

Here is my ffprobe output: ffprobe video.flv

ffprobe output

Input #0, flv, from 'video.flv':
Metadata:
|RtmpSampleAccess: true
creator : GoPro Hero
server : SRS/5.0.210(Bee)
server_version : 5.0.210
encoder : Lavf59.4.101
Duration: 00:00:19.89, start: 0.032000, bitrate: 2574 kb/s
Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1280x720 [SAR 1:1 DAR 16:9], 2560 kb/s, 29.97 fps, 29.97 tbr, 1k tbn
Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp, 131 kb/s

So the recorded flv can't reproduce it, so maybe a Gopro hardware needed to reproduce it.