[Libav-user] Missing RTSP protocol?

[Tim Lunt]

I’m trying to stream to an RTSP server but I’m getting a protocol not found error when trying to open the output.

I’ve used the 4.0 builds from https://ffmpeg.zeranoe.com/builds/ and I cant see the RTSP protocol being disabled in the build flags (see below) so not sure what I’m missing – is RTSP still available in 4.0?

Any help really appreciated.

---brief code snippet –

av_dump_format(outAVFormatContext, 0, url, 1);

if (!(outAVFormatContext->flags & AVFMT_NOFILE)) {

    ret = avio_open(&outAVFormatContext->pb, url, AVIO_FLAG_WRITE);


--log output--

Output #0, rtsp, to 'rtsp://172.16.200.4:554/live/test':
True
    Stream #0:0True
, 0, 0/0True
: Unknown: none (mpeg4)True

True

ret = -1330794744 = Protocol not found:

Could not open output file

-------------------------------

I’ve checked the protocols and build flags list for the ffmpeg build I’m using the libs from and I cant see RTSP listed?


.\ffmpeg.exe -protocols
ffmpeg version 4.0.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7.3.1 (GCC) 20180710
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
Supported file protocols:
Input:
  async
  bluray
  cache
  concat
  crypto
  data
  ffrtmpcrypt
  ffrtmphttp
  file
  ftp
  gopher
  hls
  http
  httpproxy
  https
  mmsh
  mmst
  pipe
  rtmp
  rtmpe
  rtmps
  rtmpt
  rtmpte
  rtmpts
  rtp
  srtp
  subfile
  tcp
  tls
  udp
  udplite
Output:
  crypto
  ffrtmpcrypt
  ffrtmphttp
  file
  ftp
  gopher
  http
  httpproxy
  https
  icecast
  md5
  pipe
  prompeg
  rtmp
  rtmpe
  rtmps
  rtmpt
  rtmpte
  rtmpts
  rtp
  srtp
  tee
  tcp
  tls
  udp
  udplite

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