希望你们能帮助我,因为我已经陷入困境,无法自己找到这个问题的解决方案。 我正在尝试使用ffmpeg + ffserver将视频从网络摄像头传输到用户。但我遇到了一个问题:
ffmpeg gets stream from camera and pushes it to feed of ffserver:
ffmpeg -rtsp_transport tcp -i rtsp://admin:admin@192.168.10.76:80 -y -vcodec libvpx http://127.0.0.1:8090/1.ffm
ffserver流选项:
<Stream 1.webm>
Feed 1.ffm
Format webm
NoAudio
#VideoCodec libvpx
#VideoSize 480x320
VideoFrameRate 24
AVOptionVideo flags +global_header
AVOptionVideo cpu-used 0
AVOptionVideo qmin 1
AVOptionVideo qmax 31
AVOptionVideo quality good
PreRoll 0
StartSendOnKey
VideoBitRate 128
</Stream>
(注意,注释了videoSize选项)。但即使使用默认的VideoSize(160x128),ffserver也不会响应每个请求。浏览器总是得到:
HTTP/1.0 200 OK
Pragma: no-cache
Content-Type: video/webm
但有时视频内容不会发送。
如果我取消注释VideoSize选项 - 同样的问题,但与默认视频大小相比,成功请求要少得多。
ffserver日志看起来很正常,没有错误。但正如您所看到的,有时它只向客户端发送标头:
Thu Nov 27 12:49:11 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
Thu Nov 27 12:49:25 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
Thu Nov 27 12:49:36 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
Thu Nov 27 12:50:52 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
Thu Nov 27 12:53:54 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 459
Thu Nov 27 13:30:19 2014 127.0.0.1 - - [GET] "/1.ffm HTTP/1.1" 200 4175
Thu Nov 27 13:30:34 2014 127.0.0.1 - - [GET] "/1.webm HTTP/1.1" 200 385731
Thu Nov 27 13:30:34 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 458752
Thu Nov 27 13:30:36 2014 127.0.0.1 - - [GET] "/1.ffm HTTP/1.1" 200 4175
Thu Nov 27 13:30:58 2014 127.0.0.1 - - [GET] "/1.webm HTTP/1.1" 200 493
Thu Nov 27 13:30:58 2014 127.0.0.1 - - [POST] "/1.ffm HTTP/1.1" 200 622592
有人知道它会是什么吗?实际上我需要保存原始的VideoSize for stream。我试图用ffmpeg使用命令覆盖ffserver流选项(传递与ffserver流中相同的参数):
ffmpeg -re -override_ffserver -rtsp_transport tcp -i rtsp://admin:admin@192.168.10.76:80 -an -r 24 -qmin 1 -qmax 31 -cpu-used 0 -quality good -flags:v +global_header -b:v 128 -vcodec libvpx -f webm -y http://127.0.0.1:8090/1.ffm
但是在我的情况下,我仍然有错误消息'输出文件为空,没有编码'。这是ffmpeg的输出:
ffmpeg version 2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Oct 6 2014 17:33:05 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --prefix=/opt/ffmpeg --libdir=/opt/ffmpeg/lib/ --enable-shared --enable-avresample --disable-stripping --enable-gpl --enable-version3 --enable-runtime-cpudetect --build-suffix=.ffmpeg --enable-postproc --enable-x11grab --enable-libcdio --enable-vaapi --enable-vdpau --enable-bzlib --enable-gnutls --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libfaac --enable-libvo-aacenc --enable-nonfree --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfdk_aac --enable-libopus --enable-pthreads --enable-zlib --enable-libvpx --enable-libfreetype --enable-libpulse --enable-debug=3
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, rtsp, from 'rtsp://admin:admin@192.168.10.76:80':
Metadata:
title : RTSP Session/2.0
Duration: N/A, start: 0.000000, bitrate: 128 kb/s
Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 100 tbr, 90k tbn, 50 tbc
Stream #0:1: Audio: pcm_alaw, 16000 Hz, 1 channels, s16, 128 kb/s
[swscaler @ 0x197f7a0] deprecated pixel format used, make sure you did set range correctly
[libvpx @ 0x1a0c080] Bitrate 128 is extremely low, maybe you mean 128k
[libvpx @ 0x1a0c080] v1.3.0
The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s
Output #0, webm, to 'http://127.0.0.1:8090/1.ffm':
Metadata:
title : RTSP Session/2.0
encoder : Lavf56.4.101
Stream #0:0: Video: vp8 (libvpx), yuv420p, 480x320 [SAR 32:27 DAR 16:9], q=1-31, 0 kb/s, 24 fps, 1k tbn, 24 tbc
Metadata:
encoder : Lavc56.1.100 libvpx
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> vp8 (libvpx))
Press [q] to stop, [?] for help
frame= 33 fps= 22 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=0 droframe= 43 fps= 22 q=0.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A dup=0 drop=1
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
Received signal 2: terminating.
提前致谢。
答案 0 :(得分:0)
据我了解你想:
要做到这一点,你需要:
您的案件需要:
在ffmpeg命令中启动服务器类型后:
ffmpeg -i rtsp:// admin:admin@192.168.10.76:80 -c:v libvpx -b:v 800 -an htt_p://xxx.xx.xxx.xxx:SERVER_HTTP_PORT / feed1.ffm
[从http中删除'_']
请注意,如果您的相机支持多种分辨率,如果您未指定所需的分辨率,ffmpeg将选择最差的分辨率。您可以通过键入ffmpeg -f v4l2 -list_formats all -i /dev/video0
来检查网络摄像头中支持的分辨率。如果您将/dev/video0
替换为rtsp://admin:admin@192.168.10.76:80
,这也适用于ip cam。
还要记住视频比特率(-b:v)取决于帧大小。