ffmpeg输入rtsp错误

Question

我从相机成功播放了 url rtsp://admin:admin@camera-ip:4455 这个链接。
但是当我通过ffmpeg得到它时。

ffmpeg -i rtsp://admin:admin@camera-ip:4455 -codec copy -f rtmp:/streaming-ip:1935/RTMP/test

我得到了错误:

[rtsp @ 0x241f0e0] UDP timeout, retrying with TCP
[rtsp @ 0x241f0e0] method PAUSE failed: 455 Method Not Valid in This State
[rtsp @ 0x241f0e0] Could not find codec parameters for stream 0 (Video: h264, none): 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:admin@camera-ip:4446':
  Metadata:
    title           : RTSP Session/2.0
  Duration: N/A, bitrate: 64 kb/s
    Stream #0:0: Video: h264, none, 90k tbr, 90k tbn, 180k tbc
    Stream #0:1: Audio: pcm_alaw, 8000 Hz, 1 channels, s16, 64 kb/s
Output #0, flv, to 'rtmp://streaming-ip:1935/RTMP/test':
  Metadata:
    title           : RTSP Session/2.0
    encoder         : Lavf56.15.102
    Stream #0:0: Audio: pcm_alaw ([7][0][0][0] / 0x0007), 8000 Hz, mono, 64 kb/s
Stream mapping:
  Stream #0:1 -> #0:0 (copy)
Press [q] to stop, [?] for help
[rtsp @ 0x241f0e0] UDP timeout, retrying with TCP
rtsp://admin:admin@camera-ip:4446: Operation not permitted
[flv @ 0x250ca00] Failed to update header with correct duration.
[flv @ 0x250ca00] Failed to update header with correct filesize.
size=       0kB time=00:00:00.00 bitrate=N/A
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)

是什么原因？我能做些什么来解决这个问题。

感谢您的帮助。

Answer 1

看起来您正在尝试将 RTSP 流转换为 RTMP。要将您的问题分成几部分，我建议确保您能够成功接收 RTSP 流，一旦您确认可以尝试将其转换为 RTMP。

使用 ffplay 可以验证 ffmpeg 是否可以正常接收 RTSP 流。您也可以使用 Wireshark 来捕获 RTSP 通信。

RTMP 使用 1935 端口，请确保您有权在该端口上打开 TCP 套接字。使用 sudo 以防万一。希望这可以帮助。