ffmpeg을 이용한 Point to Point 스트리밍
2020, Nov 21
특정 사용자간 실시간 영상 스트리밍 전송 기능을 시험하기 위해 수신 PC에서 ffplay로 서버를 구성하고 전송 PC에서 ffmpeg을 이용하여 실시간 영상을 스트리밍하는 방법을 알아본다.
ffplay RTSP LISTEN 모드로 실행. (Server Mode)
ffplay를 “RTSP LISTEN” 모드로 실행하고 영상이 인입되면 1024x720 해상도로 변경하여 재생한다.
❯ ffplay -rtsp_flags listen rtsp://localhost:8888/live.sdp?tcp -x 1024 -y 720
[rtsp @ 00000230e3a59c00] WARNING: Path /live.sdp differs from expected /live.sdp?tcp
Last message repeated 1 times
[rtsp @ 00000230e3a59c00] Updating control URI to rtsp://localhost:8888/live.sdp
Input #0, rtsp, from 'rtsp://localhost:8888/live.sdp?tcp':B f=0/0
Metadata:
title : No Name
Duration: N/A, start: -0.470998, bitrate: N/A
Stream #0:0: Video: h264 (High), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 24 fps, 24 tbr, 90k tbn, 48 tbc
Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp
3.83 A-V: 0.000 fd= 0 aq= 19KB vq= 282KB sq= 0B f=1/1
ffmpeg RTSP Restream (Client Mode)
ffplay를 RTSP Server모드로 구동한 후 ffmpeg로 인코딩된 mp4 파일을 열어 8888 포트로 전송한다.
❯ ffmpeg.exe -re -i .\BigBuckBunny.mp4 -c copy -f rtsp -rtsp_transport tcp rtsp://localhost:8888/live.sdp
ffmpeg version 4.3.1-2020-10-01-full_build-www.gyan.dev Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 10.2.0 (Rev3, Built by MSYS2 project)
. . . 컴파일정보 생략
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '.\BigBuckBunny.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isomavc1mp42
creation_time : 2010-01-10T08:29:06.000000Z
Duration: 00:09:56.47, start: 0.000000, bitrate: 2119 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2010-01-10T08:29:06.000000Z
handler_name : (C) 2007 Google Inc. v08.13.2007.
Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1991 kb/s, 24 fps, 24 tbr, 24k tbn, 48 tbc (default)
Metadata:
creation_time : 2010-01-10T08:29:06.000000Z
handler_name : (C) 2007 Google Inc. v08.13.2007.
Output #0, rtsp, to 'rtsp://localhost:8888/live.sdp':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isomavc1mp42
encoder : Lavf58.45.100
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=2-31, 1991 kb/s, 24 fps, 24 tbr, 90k tbn, 24 tbc (default)
Metadata:
creation_time : 2010-01-10T08:29:06.000000Z
handler_name : (C) 2007 Google Inc. v08.13.2007.
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2010-01-10T08:29:06.000000Z
handler_name : (C) 2007 Google Inc. v08.13.2007.
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Stream #0:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
av_interleaved_write_frame(): Broken pipe00:00:06.15 bitrate=N/A speed=1.01x
Error writing trailer of rtsp://localhost:8888/live.sdp: Broken pipe
frame= 148 fps= 23 q=-1.0 Lsize=N/A time=00:00:06.61 bitrate=N/A speed=1.01x
video:1834kB audio:102kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
RTSP 트랜잭션
ffplay에서 유입되는 RTSP 트랜잭션을 보면 아래와 같다.
OPTIONS rtsp://192.168.0.19:8888/live.sdp RTSP/1.0
CSeq: 1
User-Agent: Lavf58.45.100
RTSP/1.0 200 OK
CSeq: 1
Server: Lavf58.45.100
Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD
ANNOUNCE rtsp://192.168.0.19:8888/live.sdp RTSP/1.0
Content-Type: application/sdp
CSeq: 2
User-Agent: Lavf58.45.100
Content-Length: 498
v=0
o=- 0 0 IN IP4 127.0.0.1
s=No Name
c=IN IP4 192.168.0.19
t=0 0
a=tool:libavformat 58.45.100
m=video 0 RTP/AVP 96
b=AS:1991
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; sprop-parameter-sets=Z2QAH6wkhAFAFuwEQAAAAwBAAAAMI8YMkg==,aO4yyLA=; profile-level-id=64001F
a=control:streamid=0
m=audio 0 RTP/AVP 97
b=AS:125
a=rtpmap:97 MPEG4-GENERIC/44100/2
a=fmtp:97 profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3; config=1210
a=control:streamid=1
RTSP/1.0 200 OK
CSeq: 2
Server: Lavf58.45.100
SETUP rtsp://192.168.0.19:8888/live.sdp/streamid=0 RTSP/1.0
Transport: RTP/AVP/TCP;unicast;interleaved=0-1;mode=record
CSeq: 3
User-Agent: Lavf58.45.100
RTSP/1.0 200 OK
CSeq: 3
Server: Lavf58.45.100
Transport: RTP/AVP/TCP;unicast;mode=receive;interleaved=0-1
Session: 1455181266
SETUP rtsp://192.168.0.19:8888/live.sdp/streamid=1 RTSP/1.0
Transport: RTP/AVP/TCP;unicast;interleaved=2-3;mode=record
CSeq: 4
User-Agent: Lavf58.45.100
Session: 1455181266
RTSP/1.0 200 OK
CSeq: 4
Server: Lavf58.45.100
Transport: RTP/AVP/TCP;unicast;mode=receive;interleaved=2-3
Session: 1455181266
RECORD rtsp://192.168.0.19:8888/live.sdp RTSP/1.0
Range: npt=0.000-
CSeq: 5
User-Agent: Lavf58.45.100
Session: 1455181266
RTSP/1.0 200 OK
CSeq: 5
Server: Lavf58.45.100
Session: 1455181266
. . . (skip)
PT=DynamicRTP-Type-96, SSRC=0x73150015, Seq=2784, Time=40284601, Mark
. . . (skip)
TEARDOWN rtsp://192.168.0.19:8888/live.sdp RTSP/1.0
CSeq: 6
User-Agent: Lavf58.45.100
Session: 1455181266