Unable to do 'rtsp stream' when 'rtsp_flags listen'

[Dinesh Gupta]

Summary of the bug:

FFmpeg will not streaming a RSTP stream. I want to FFmpeg work as server and stream desktop. Also, I am generating '.sdp' file so that client may connect. But '.sdp' file not being generated.
It hangs and must be terminated with Ctrl+C(press twice).

After issuing a Ctrl+C twice, it displays the error: Could not write header for output file #0 (incorrect codec parameters ?): Immediate exit requested
Error initializing output stream 0:0 --

How to reproduce:

D:\small\ffmpeg-4.1-win32-shared\bin>ffmpeg -sdp_file stream1.sdp -f gdigrab -i desktop -rtsp_flags listen -f rtsp rtsp://100.64.129.179:15450

ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers

built with gcc 8.2.1 (GCC) 20181017
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --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. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100

[gdigrab @ 05aed680] Capturing whole desktop as 1366x768x32 at (0,0)
[gdigrab @ 05aed680] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, gdigrab, from 'desktop':

Duration: N/A, start: 1545836929.667861, bitrate: 1006131 kb/s

Stream #0:0: Video: bmp, bgra, 1366x768, 1006131 kb/s, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc

Stream mapping:

Stream #0:0 -> #0:0 (bmp (native) -> mpeg4 (native))

Press [q] to stop, ? for help
Could not write header for output file #0 (incorrect codec parameters ?): Immediate exit requested
Error initializing output stream 0:0 --
Exiting normally, received signal 2.

[Carl Eugen Hoyos]

Is the issue reproducible with current FFmpeg git head? Please test an artificial video source like testsrc2 unless you want to report an issue with screen grabbing. And please move sdp_file behind the input stream.

[Dinesh Gupta]

yes It is reproducible with current git head.

I followed your suggestion but getting the same result as previous. I placed the

sdp_file

after the input and not getting the desire result.

[Dinesh Gupta]

I downloaded latest nightly build run the below command

C:\ffmpeg_latest>ffmpeg -loglevel trace -f gdigrab -i desktop -sdp_file stream1.sdp -rtsp_flags listen -f rtsp rtsp://10.0.0.30:15450
ffmpeg version N-92833-gfccba32b4c Copyright (c) 2000-2018 the FFmpeg developers

built with gcc 8.2.1 (GCC) 20181201
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --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 --enable-libopenmpt
libavutil 56. 25.100 / 56. 25.100
libavcodec 58. 42.104 / 58. 42.104
libavformat 58. 25.100 / 58. 25.100
libavdevice 58. 6.101 / 58. 6.101
libavfilter 7. 46.101 / 7. 46.101
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100

Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'trace'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'gdigrab'.
Reading option '-i' ... matched as input url with argument 'desktop'.
Reading option '-sdp_file' ... matched as option 'sdp_file' (specify a file in which to print sdp information) with argument 'stream1.sdp'.
Reading option '-rtsp_flags' ... matched as AVOption 'rtsp_flags' with argument 'listen'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'rtsp'.
Reading option 'rtsp://10.0.0.30:15450' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument trace.
Applying option sdp_file (specify a file in which to print sdp information) with argument stream1.sdp.
Successfully parsed a group of options.
Parsing a group of options: input url desktop.
Applying option f (force format) with argument gdigrab.
Successfully parsed a group of options.
Opening an input file: desktop.
[gdigrab @ 0437db40] Capturing whole desktop as 1366x768x32 at (0,0)
[gdigrab @ 0437db40] Cursor pos (1363,51) -> (1363,51)

Last message repeated 1 times

[gdigrab @ 0437db40] Probe buffer size limit of 5000000 bytes reached
[gdigrab @ 0437db40] Stream #0: not enough frames to estimate rate; consider increasing probesize
[gdigrab @ 0437db40] stream 0: start_time: 1546151393.403 duration: -9223372036854.775
[gdigrab @ 0437db40] format: start_time: 1546151393.403 duration: -9223372036854.775 bitrate=1006131 kb/s
Input #0, gdigrab, from 'desktop':

Duration: N/A, start: 1546151393.403101, bitrate: 1006131 kb/s

Stream #0:0, 2, 1/1000000: Video: bmp, 1 reference frame, bgra, 1366x768, 0/1, 1006131 kb/s, 29.97 fps, 1000k tbr, 1000k tbn, 1000k tbc

Successfully opened the file.
Parsing a group of options: output url rtsp://10.0.0.30:15450.
Applying option f (force format) with argument rtsp.
Successfully parsed a group of options.
Opening an output file: rtsp://10.0.0.30:15450.
Successfully opened the file.
Stream mapping:

Stream #0:0 -> #0:0 (bmp (native) -> mpeg4 (native))

Press [q] to stop, ? for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
detected 4 logical cores
[graph 0 input from stream 0:0 @ 0428b480] Setting 'video_size' to value '1366x768'
[graph 0 input from stream 0:0 @ 0428b480] Setting 'pix_fmt' to value '28'
[graph 0 input from stream 0:0 @ 0428b480] Setting 'time_base' to value '1/1000000'
[graph 0 input from stream 0:0 @ 0428b480] Setting 'pixel_aspect' to value '0/1'
[graph 0 input from stream 0:0 @ 0428b480] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0428b480] Setting 'frame_rate' to value '30000/1001'
[graph 0 input from stream 0:0 @ 0428b480] w:1366 h:768 pixfmt:bgra tb:1/1000000 fr:30000/1001 sar:0/1 sws_param:flags=2
[format @ 0428b9c0] Setting 'pix_fmts' to value 'yuv420p'
[auto_scaler_0 @ 0428be80] Setting 'flags' to value 'bicubic'
[auto_scaler_0 @ 0428be80] w:iw h:ih flags:'bicubic' interl:0
[format @ 0428b9c0] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_null_0' and the filter 'format'
[AVFilterGraph @ 04277200] query_formats: 4 queried, 2 merged, 1 already done, 0 delayed
[auto_scaler_0 @ 0428be80] w:1366 h:768 fmt:bgra sar:0/1 -> w:1366 h:768 fmt:yuv420p sar:0/1 flags:0x4
[mpeg4 @ 04285e00] intra_quant_bias = 0 inter_quant_bias = -64
[tcp @ 042a9940] No default whitelist set
[tcp @ 042a9940] Original list of addresses:
[tcp @ 042a9940] Address 10.0.0.30 port 15450
[tcp @ 042a9940] Interleaved list of addresses:
[tcp @ 042a9940] Address 10.0.0.30 port 15450
[tcp @ 042a9940] Starting connection attempt to 10.0.0.30 port 15450

---

And tried to connect from VLC player then received error:

VLC is unable to open the MRL 'rtsp://10.0.0.30/15450'

So basically it is not waiting for client to connect the ffmepg rtsp.

[Jun Li]

try this,
terminal one: ./ffplay -rtsp_flags listen rtsp://localhost:15450
terminal two: ./ffmpeg -f gdigrab -i desktop -f rtsp rtsp://localhost:15450

rtsp client(ffmpeg here) send Announce->Setup->Record request to listener(ffplay here), and then send packets through RTP.

So you can use ffplay as a server to listen, and ffmpeg as client to push from your local camera to server. I tried on my mac and works find. here is my cmd :
terminal one : sudo ./ffplay -rtsp_flags listen rtsp://localhost:554
terminal two: ffmpeg -f avfoundation -video_size 320x240 -framerate 30 -pixel_format bgr0 -i "FaceTime HD Camera" -f rtsp rtsp://localhost:554