我有一个 mediasoup 服务器设置，现在我需要录制功能。为此，我正在执行以下操作 -
在让事件开始录制时，我调用此函数：
async handleStartRecording(peer, router)
{
let transports = [],
consumers = [],
ffmpegInput = {};
for(let entry of peer.producers.entries())
{
const rtpTransport = await router.createPlainTransport({
comedia: false,
rtcpMux: false,
listenIp: { ip: '127.0.0.1', announcedIp: null }
});
transports.push(rtpTransport);
const port = (entry[1].kind === 'audio') ? 8994 : 8996;
const rtcpPort = port+1;
await rtpTransport.connect({
ip: '127.0.0.1',
port: port,
rtcpPort: rtcpPort,
rtcpMux: false
});
peer.addTransport(rtpTransport.id, rtpTransport);
const rtpConsumer = await rtpTransport.consume({
producerId: entry[0],
rtpCapabilities: router.rtpCapabilities,
paused: true,
});
consumers.push(rtpConsumer);
const codecs = [];
const routerCodec = router.rtpCapabilities.codecs.find(
codec => codec.kind === entry[1].kind
);
codecs.push(routerCodec);
const rtpCapabilities = {
codecs,
rtcpFeedback: []
};
ffmpegInput[entry[1].kind] = {
port,
rtcpPort,
localRtcpPort: rtpTransport.rtcpTuple ? rtpTransport.rtcpTuple.localPort : undefined,
rtpCapabilities,
rtpParameters: rtpConsumer.rtpParameters,
preferredPayloadType: routerCodec.payloadType
};
}
ffmpegInput.fileName = Date.now().toString();
peer._process = new FFmpeg(ffmpegInput, consumers);
}
ffmpeg 类是：
class FFmpeg {
constructor(rtpParameters, consumers) {
this._rtpParameters = rtpParameters;
this._consumers = consumers;
this._process = undefined;
this._createProcess();
}
_createProcess() {
this._process = child_process.spawn('ffmpeg', this._commandArgs);
consumers.forEach((consumer) =>
{
consumer.resume();
});
}
get _commandArgs() {
let commandArgs = [
'-loglevel',
'debug',
'-protocol_whitelist',
'file,crypto,pipe,udp,rtp',
'-fflags',
'+genpts',
'-i',
'/recording/input-h264.sdp', //path to sdp file has full path this is sample
'-map', // video
'0:v:0',
'-c:v',
'copy',
'-map', //audio
'0:a:0',
'-strict',
'-2',
'-c:a',
'copy',
'-f',
'webm',
'-flags',
'+global_header',
'-y',
`/files/${this._rtpParameters.fileName}.webm`
]);
return commandArgs;
}
}
sdp文件：
v=0
o=- 0 0 IN IP4 127.0.0.1
s=FFmpeg
c=IN IP4 127.0.0.1
t=0 0
m=video 8996 RTP/AVPF 101
a=rtcp:8997
a=rtpmap:101 VP8/90000
a=fmtp:101 level-asymmetry-allowed=1
m=audio 8994 RTP/AVPF 100
a=rtcp:8995
a=rtpmap:111 opus/48000/2
a=fmtp:111 minptime=10;useinbandfec=1
现在，我得到一个未找到流 0 错误的编解码器参数。
createProcess() [sdpString:v=0
o=- 0 0 IN IP4 127.0.0.1
s=FFmpeg
c=IN IP4 127.0.0.1
t=0 0
m=video 8996 RTP/AVP 101
a=rtpmap:101 VP8/90000
a=sendonly
m=audio 8994 RTP/AVP 100
a=rtpmap:100 opus/48000/2
a=sendonly
]
commandArgs:[ '-analyzeduration',
'2147483647',
'-probesize',
'2147483647',
'-loglevel',
'debug',
'-protocol_whitelist',
'file,crypto,pipe,udp,rtp',
'-fflags',
'+genpts',
'-i',
'/recording/input-h264.sdp',
'-map',
'0:v:0',
'-c:v',
'copy',
'-map',
'0:a:0',
'-strict',
'-2',
'-c:a',
'copy',
'-f',
'webm',
'-flags',
'+global_header',
'-y',
'/files/1623939179824.webm',
[length]: 28 ]
ffmpeg::process::data(err) [data:ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
]
ffmpeg::process::data(err) [data: configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
]
ffmpeg::process::data(err) [data: libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libavresample 4. 0. 0 / 4. 0. 0
]
ffmpeg::process::data(err) [data: libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Splitting the commandline.
Reading option '-analyzeduration' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'analyzeduration' with argument '2147483647'.
Reading option '-probesize' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'probesize' with argument '2147483647'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-protocol_whitelist' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'protocol_whitelist' with argument 'file,crypto,pipe,udp,rtp'.
Reading option '-fflags' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'fflags' with argument '+genpts'.
Reading option '-i' ... matched as input url with argument '/recording/input-h264.sdp'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0:v:0'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-map' ...]
ffmpeg::process::data(err) [data: matched as option 'map' (set input stream mapping) with argument '0:a:0'.
Reading option '-strict' ...]
ffmpeg::process::data(err) [data:Routing option strict to both codec and muxer layer
matched as AVOption 'strict' with argument '-2'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'webm'.
Reading option '-flags' ...]
ffmpeg::process::data(err) [data: matched as AVOption 'flags' with argument '+global_header'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '/files/1623939179824.webm' ... matched as output url.
Finished splitting the commandline.
]
ffmpeg::process::data(err) [data:Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url /recording/input-h264.sdp.
Successfully parsed a group of options.
Opening an input file: /recording/input-h264.sdp.
]
ffmpeg::process::data(err) [data:[NULL @ 0x55b7141c1a80] Opening '/recording/input-h264.sdp' for reading
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] Format sdp probed with size=2048 and score=50
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] video codec set to: vp8
[sdp @ 0x55b7141c1a80] audio codec set to: opus
[sdp @ 0x55b7141c1a80] audio samplerate set to: 48000
[sdp @ 0x55b7141c1a80] audio channels set to: 2
]
ffmpeg::process::data(err) [data:[udp @ 0x55b7141c4d40] end receive buffer size reported is 131072
[udp @ 0x55b7141cac00] end receive buffer size reported is 131072
[sdp @ 0x55b7141c1a80] setting jitter buffer size to 500
]
ffmpeg::process::data(err) [data:[udp @ 0x55b7141c5d40] end receive buffer size reported is 131072
]
ffmpeg::process::data(err) [data:[udp @ 0x55b7141c5e00] end receive buffer size reported is 131072
[sdp @ 0x55b7141c1a80] setting jitter buffer size to 500
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] Before avformat_find_stream_info() pos: 262 bytes read:262 seeks:0 nb_streams:2
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] Could not find codec parameters for stream 0 (Video: vp8, 1 reference frame, yuv420p): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
]
ffmpeg::process::data(err) [data:[sdp @ 0x55b7141c1a80] After avformat_find_stream_info() pos: 262 bytes read:262 seeks:0 frames:0
Input #0, sdp, from '/recording/input-h264.sdp':
Metadata:
title : FFmpeg
Duration: N/A, bitrate: N/A
Stream #0:0, 0, 1/90000: Video: vp8, 1 reference frame, yuv420p, 90k tbr, 90k tbn, 90k tbc
Stream #0:1, 0, 1/48000: Audio: opus, 48000 Hz, stereo, fltp
Successfully opened the file.
Parsing a group of options: output url /files/1623939179824.webm.
Applying option map (set input stream mapping) with argument 0:v:0.
Applying option c:v (codec name) with argument copy.
Applying option map (set input stream mapping) with argument 0:a:0.
]
ffmpeg::process::data(err) [data:Applying option c:a (codec name) with argument copy.
Applying option f (force format) with argument webm.
Successfully parsed a group of options.
Opening an output file: /files/1623939179824.webm.
]
ffmpeg::process::data(err) [data:[file @ 0x55b714243880] Setting default whitelist 'file,crypto'
]
ffmpeg::process::data(err) [data:Successfully opened the file.
]
ffmpeg::process::data(err) [data:[webm @ 0x55b71423e100] dimensions not set
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Last message repeated 1 times
[AVIOContext @ 0x55b714243b00] Statistics: 0 seeks, 0 writeouts
[AVIOContext @ 0x55b7141cacc0] Statistics: 262 bytes read, 0 seeks
]
ffmpeg::process::close
我已经做了好几天了，我什至不知道如何调试这个问题。我尝试使用 vlc 的流选项和服务器的 url 来检查传输是否正常工作，但它没有在该端口的 localhost 上检测到任何内容。
如果有人对此问题或调试方法有任何想法，请告诉我..