push RTSP stream with ffmpeg by python

readme

I have not found information on the Internet to implement the python push RTSP stream, so I try it.







I think RTMP can get more way to make it. 

:)

main.py

import cv2
import subprocess as sp
if __name__ == "__main__":
    rtsp_server = 'rtsp://example.org:554/...' # push server (output server)
    
    #pull rtsp data, or your cv cap.  (input server)
    cap = cv2.VideoCapture(
        'rtsp://example.org:554/pull from me ')
    
    
    sizeStr = str(int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))) + \
        'x' + str(int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)))
    fps = int(cap.get(cv2.CAP_PROP_FPS))
    
    command = ['ffmpeg',
               '-re',
               '-s', sizeStr,
               '-r', str(fps),  # rtsp fps (from input server)
               '-i', '-',
               
               # You can change ffmpeg parameter after this item.
               '-pix_fmt', 'yuv420p',
               '-r', '30',  # output fps
               '-g', '50',
               '-c:v', 'libx264',
               '-b:v', '2M',
               '-bufsize', '64M',
               '-maxrate', "4M",
               '-preset', 'veryfast',
               '-rtsp_transport', 'tcp',
               '-segment_times', '5',
               '-f', 'rtsp',
               rtsp_server]

    process = sp.Popen(command, stdin=sp.PIPE)

    while(cap.isOpened()):
        ret, frame = cap.read()
        ret2, frame2 = cv2.imencode('.png', frame)
        process.stdin.write(frame2.tobytes())

what is the error??

ffmpeg version 2021-08-04-git-3b298640e1-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. 4.100 / 59. 4.100
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, png_pipe, from 'pipe:':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: png, rgb24(pc), 240x160, 25 fps, 25 tbr, 25 tbn
Stream mapping:
Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
[libx264 @ 0000026773ecab00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000026773ecab00] profile High, level 4.1, 4:2:0, 8-bit
[libx264 @ 0000026773ecab00] 264 - core 164 r3065 ae03d92 - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=5 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=50 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=abr mbtree=1 bitrate=2000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=4000 vbv_bufsize=64000 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00

Hi,
It seems you have to pass a source video as argument in line 7.
You can specify a device as follow:
cap = cv2.VideoCapture(0) #This is for devices like webcams
Or
cap = cv2.VideoCapture("~/videos/stream.mp4")

Hi,
It seems you have to pass a source video as argument in line 7.
You can specify a device as follow:
cap = cv2.VideoCapture(0) #This is for devices like webcams
Or
cap = cv2.VideoCapture("~/videos/stream.mp4")

Yes, you can use any source to push RTSP stream.

This gist just push RTSP stream, any input source is available.

Hi,
It seems you have to pass a source video as argument in line 7.
You can specify a device as follow:
cap = cv2.VideoCapture(0) #This is for devices like webcams
Or
cap = cv2.VideoCapture("~/videos/stream.mp4")

Yes, you can use any source to push RTSP stream.

This gist just push RTSP stream, any input source is available.

Is there any documentation about using ffmpeg command in the format you posted above? For example, for changing the size video to a minor quality