FFmpeg: Live streaming using RSTP C++ -

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i want receive video stream camera, process using opencv (for tests - draw red rectangle) , live stream result.

i can read camera frames, convert opencv mat , change them avframe.

from console im starting rtsp server using: ffplay -rtsp_flags listen -i rtsp://127.0.0.1:8765/live.sdp problem shows when im trying call avio_open();

av_register_all(); avformat_network_init(); avcodec_register_all(); (...) avformat_alloc_output_context2(&outputcontext, null, "rtsp", outputpath.c_str()); outputformat = outputcontext->oformat;  cout << "codec = " << avcodec_get_name(outputformat->video_codec) << endl;  if (outputformat->video_codec != av_codec_id_none) {     videostream = add_stream(outputcontext, &outputvideocodec, outputformat->video_codec); } char errorbuff[80]; int k = avio_open(&outputcontext->pb, outputpath.c_str(), avio_flag_write); if (k < 0) {     cout << "code: " << k << endl;     fprintf(stderr, "%s \n", av_make_error_string(errorbuff, 80, k)); }  if (avformat_write_header(outputcontext, null) < 0) {     fprintf(stderr, "error occurred when writing header"); }

}

where outputpath = "rtsp://127.0.0.1:8765/live.sdp" avformat_alloc_output_context2 returns 0, avio_open < 0 app prints:

code: -1330794744

protocol not found

i have no idea wrong. using ffmpeg build https://ffmpeg.zeranoe.com/builds/ 64-bit dev

enable file protocol doing:

--enable-protocol=file

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