你好，我可以使用 VLC 通过以下 URL 从我的 IP 摄像头成功传输视频：rtsp://192.168.0.6:554/cam/realmonitor
当尝试使用 FFMPEG 时，出现以下错误：我已附加成功的 VLC 通信以及失败的 FFMPEG 通信的对话。
我怎样才能使 FFMPEG 像 VLC 一样成功捕获流？
提前感谢您的任何帮助
C:\ffmpeg-20150415-git-fbdaebb-win64-static\ffmpeg-20150415-git-fbdaebb-win64-static\bin>ffmpeg -i rtsp://admin:[email protected]:554/cam/realmonitor -rtsp_transport tcp -f image2 -threads 4 -t 14400 -async 1 -r 1/5 -q 1.5 -vcodec mjpeg c:\Test.jpg
ffmpeg version N-71455-gfbdaebb Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --e
nable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
--enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-l
ibx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
libavutil 54. 22.101 / 54. 22.101
libavcodec 56. 34.100 / 56. 34.100
libavformat 56. 30.100 / 56. 30.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 14.100 / 5. 14.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Invalid interval end specification ''
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[mjpeg @ 0000000000312fa0] RTP: missed 14 packets
[rtsp @ 0000000000330c40] Received packet without a start chunk; dropping frame.
[rtsp @ 0000000000330c40] Could not find codec parameters for stream 0 (Video: mjpeg, none(bt470bg/unknown/unknown)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://admin:[email protected]:554/cam/realmonitor':
Metadata:
title : RTSP Session of ZheJiang Dahua Technology CO.,LTD.
Duration: -187967:-4:-22.-32, start: 676681462.328875, bitrate: N/A
Stream #0:0: Video: mjpeg, none(bt470bg/unknown/unknown), 90k tbr, 90k tbn, 90k tbc
Stream #0:1: Audio: pcm_alaw, 8000 Hz, 1 channels, s16, 64 kb/s
Codec AVOption threads () specified for output file #0 (c:\Test.jpg) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video str
eams) or that it is a private option of some encoder which was not actually used for any stream.
Output #0, image2, to 'c:\Test.jpg':
Metadata:
title : RTSP Session of ZheJiang Dahua Technology CO.,LTD.
Output file #0 does not contain any stream
Received signal 2: terminating.
FFMPEG wireshark 对话：
OPTIONS rtsp://192.168.0.6:554/cam/realmonitor RTSP/1.0
CSeq: 1
User-Agent: Lavf56.30.100
RTSP/1.0 401 Unauthorized
WWW-Authenticate: Basic realm="Dahua"
Server: Dahua Rtsp Server
Content-Length: 0
CSeq: 1
OPTIONS rtsp://192.168.0.6:554/cam/realmonitor RTSP/1.0
CSeq: 2
User-Agent: Lavf56.30.100
Authorization: Basic YWRtaW46YWRtaW4=
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
Content-Length: 0
CSeq: 2
Public: OPTIONS,DESCRIBE,SETUP,PLAY,PAUSE,TEARDOWN,SET_PARAMETER
DESCRIBE rtsp://192.168.0.6:554/cam/realmonitor RTSP/1.0
Accept: application/sdp
CSeq: 3
User-Agent: Lavf56.30.100
Authorization: Basic YWRtaW46YWRtaW4=
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
CSeq: 3
Content-Base: rtsp://192.168.0.6:554/cam/realmonitor/
Content-Type: application/sdp
Content-Length: 339
Cache-Control: must-revalidate
x-Accept-Dynamic-Rate: 1
v=0
o=- 2251938208 2251938208 IN IP4 0.0.0.0
s=RTSP Session of ZheJiang Dahua Technology CO.,LTD.
c=IN IP4 0.0.0.0
t=0 0
a=control:*
a=range:now-
a=packetization-supported:DH
m=video 0 RTP/AVP 26
a=control:trackID=0
a=framerate:25.000000
a=rtpmap:26 JPEG/90000
m=audio 0 RTP/AVP 8
a=control:trackID=1
a=rtpmap:8 PCMA/8000
SETUP rtsp://192.168.0.6:554/cam/realmonitor/trackID=0 RTSP/1.0
Transport: RTP/AVP/UDP;unicast;client_port=19420-19421
x-Dynamic-Rate: 0
CSeq: 4
User-Agent: Lavf56.30.100
Authorization: Basic YWRtaW46YWRtaW4=
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
Content-Length: 0
CSeq: 4
Transport: RTP/AVP;unicast;client_port=19420-19421;server_port=20004-20005;ssrc=4BC14B3E
x-dynamic-rate: 1
Session: 1429257645838106;timeout=90
SETUP rtsp://192.168.0.6:554/cam/realmonitor/trackID=1 RTSP/1.0
Transport: RTP/AVP/UDP;unicast;client_port=19422-19423
x-Dynamic-Rate: 0
CSeq: 5
User-Agent: Lavf56.30.100
Session: 1429257645838106
Authorization: Basic YWRtaW46YWRtaW4=
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
Content-Length: 0
CSeq: 5
Transport: RTP/AVP;unicast;client_port=19422-19423;server_port=20006-20007;ssrc=4BC14B29
x-dynamic-rate: 1
Session: 1429257645838106;timeout=90
PLAY rtsp://192.168.0.6:554/cam/realmonitor/ RTSP/1.0
Range: npt=0.000-
CSeq: 6
User-Agent: Lavf56.30.100
Session: 1429257645838106
Authorization: Basic YWRtaW46YWRtaW4=
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
RTP-Info: url=trackID=0;seq=26201;rtptime=253800,url=trackID=1;seq=25939;rtptime=22560
Range: npt=0.000000-
Content-Length: 0
CSeq: 6
Session: 1429257645838106
在 Wireshark 中我可以看到 VLC 和 IP 摄像机之间的成功对话。
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
Content-Length: 0
CSeq: 5
Public: OPTIONS,DESCRIBE,SETUP,PLAY,PAUSE,TEARDOWN,SET_PARAMETER
DESCRIBE rtsp://192.168.0.6:554/cam/realmonitor RTSP/1.0
CSeq: 6
Authorization: Basic YWRtaW46YWRtaW4=
User-Agent: LibVLC/2.1.5 (LIVE555 Streaming Media v2014.05.27)
Accept: application/sdp
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
CSeq: 6
Content-Base: rtsp://192.168.0.6:554/cam/realmonitor/
Content-Type: application/sdp
Content-Length: 339
Cache-Control: must-revalidate
x-Accept-Dynamic-Rate: 1
v=0
o=- 2251938209 2251938209 IN IP4 0.0.0.0
s=RTSP Session of ZheJiang Dahua Technology CO.,LTD.
c=IN IP4 0.0.0.0
t=0 0
a=control:*
a=range:now-
a=packetization-supported:DH
m=video 0 RTP/AVP 26
a=control:trackID=0
a=framerate:25.000000
a=rtpmap:26 JPEG/90000
m=audio 0 RTP/AVP 8
a=control:trackID=1
a=rtpmap:8 PCMA/8000
SETUP rtsp://192.168.0.6:554/cam/realmonitor/trackID=0 RTSP/1.0
CSeq: 7
Authorization: Basic YWRtaW46YWRtaW4=
User-Agent: LibVLC/2.1.5 (LIVE555 Streaming Media v2014.05.27)
Transport: RTP/AVP/TCP;unicast;interleaved=0-1
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
Content-Length: 0
CSeq: 7
Transport: RTP/AVP/TCP;unicast;interleaved=0-1;ssrc=00AED19E
x-dynamic-rate: 1
Session: 1429217292541559;timeout=90
SETUP rtsp://192.168.0.6:554/cam/realmonitor/trackID=1 RTSP/1.0
CSeq: 8
Authorization: Basic YWRtaW46YWRtaW4=
User-Agent: LibVLC/2.1.5 (LIVE555 Streaming Media v2014.05.27)
Transport: RTP/AVP/TCP;unicast;interleaved=2-3
Session: 1429217292541559
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
Content-Length: 0
CSeq: 8
Transport: RTP/AVP/TCP;unicast;interleaved=2-3;ssrc=00AED189
x-dynamic-rate: 1
Session: 1429217292541559;timeout=90
PLAY rtsp://192.168.0.6:554/cam/realmonitor/ RTSP/1.0
CSeq: 9
Authorization: Basic YWRtaW46YWRtaW4=
User-Agent: LibVLC/2.1.5 (LIVE555 Streaming Media v2014.05.27)
Session: 1429217292541559
Range: npt=0.000-
RTSP/1.0 200 OK
Server: Dahua Rtsp Server
RTP-Info: url=trackID=0;seq=47727;rtptime=253800,url=trackID=1;seq=5395;rtptime=22560
Range: npt=0.000000-
Content-Length: 0
CSeq: 9
Session: 1429217292541559
$......o...h........A..Z............. <BEGINING OF JPEG DATA FRAMES>