rtsp source ERR: Content-Length exceeds 4096

[zhaibin18]

Which version are you using?

v0.12.1

Which operating system are you using?

Linux

Describe the problem

2020/11/27 13:36:54 [0/0/0] rtsp-simple-server v0.12.1
2020/11/27 13:36:54 [0/0/0] [UDP/RTP server] opened on :8002
2020/11/27 13:36:54 [0/0/0] [UDP/RTCP server] opened on :8003
2020/11/27 13:36:54 [0/0/0] [TCP server] opened on :8554
2020/11/27 13:36:54 [0/0/0] [path tv01] rtsp source started
2020/11/27 13:36:54 [0/0/0] [path tv01] connecting to rtsp source
2020/11/27 13:36:54 [0/0/0] [path tv01] rtsp source ERR: Content-Length exceeds 4096

Did you attach a network dump?

yes
4k_rtsp.zip

[aler9]

Hello, thanks for reporting the issue, the maximum length of content of RTSP requests/responses has been increased from 4k to 128k - the fix will be included in the next release.
Meanwhile, you can use this nightly release

(removed)

[zhaibin18]

thanks！there is no error about ‘Content-Length exceeds 4096’ but with error
’rtsp source ERR: sdp: invalid syntax b=RS:0 (b=RS:0)‘
rtsp_4k_02.zip

[aler9]

Hello, your SDP is now supported, please try this nightly release

(removed)

[zhaibin18]

there is another error:
2020/12/01 08:44:35 [0/0/0] rtsp-simple-server v0.12.2-4-g716e2ed
2020/12/01 08:44:35 [0/0/0] [UDP/RTP server] opened on :8002
2020/12/01 08:44:35 [0/0/0] [UDP/RTCP server] opened on :8003
2020/12/01 08:44:35 [0/0/0] [TCP server] opened on :8554
2020/12/01 08:44:35 [0/0/0] [path tv01] rtsp source started
2020/12/01 08:44:35 [0/0/0] [path tv01] connecting to rtsp source
2020/12/01 08:44:35 [0/0/0] [path tv01] rtsp source ERR: transport header: invalid ports (8052)
2020/12/01 08:44:40 [0/0/0] [path tv01] connecting to rtsp source
2020/12/01 08:44:40 [0/0/0] [path tv01] rtsp source ERR: transport header: invalid ports (8052)
rtsp_4k_03.zip

[aler9]

@zhaibin18 i've fixed that too :)
rtsp-simple-server and the underlying libraries gortsplib and pion/sdp are implemented by following the official RFC specifications, it seems like your TV (is it a TV?) is using a highly irregular syntax. Never mind. Let's see if this is the final fix or more are required.

(removed)

[zhaibin18]

@aler9 many thank for your update,the input is IPTV from my ISP, I use the latest build and there are still errors:
2020/12/07 11:58:32 [0/0/0] rtsp-simple-server v0.12.2-18-ga6c06d3
2020/12/07 11:58:32 [0/0/0] [UDP/RTP server] opened on :8002
2020/12/07 11:58:32 [0/0/0] [UDP/RTCP server] opened on :8003
2020/12/07 11:58:32 [0/0/0] [TCP server] opened on :8554
2020/12/07 11:58:32 [0/0/0] [path tv01] rtsp source started
2020/12/07 11:58:32 [0/0/0] [path tv01] connecting to rtsp source
2020/12/07 11:58:32 [0/0/0] [path tv01] rtsp source ERR: bad status code: 405 (Method Not Allowed)
rtst_4k_04.zip

[aler9]

Hello, the client (rtsp-simple-server) is able to correctly setup the stream, but when it calls PLAY, the server (IPTV) suddenly replies with 405.

Here's what happens:

[client] DESCRIBE rtsp://61.135.88.174:554/PLTV/88888892/224/3221225968/10000100000000060000000000157831_0.smil?playseek=20201206090000-20201206100000 RTSP/1.0
[server] the stream has been moved to rtsp://61.135.88.174:554/refuse/unavailable_media.wmv
[client] DESCRIBE rtsp://61.135.88.174:554/refuse/unavailable_media.wmv
[server] ok, the path contains two tracks, one video, one application
[client] SETUP video
[server] ok
[client] SETUP application
[server] ok
[client] PLAY rtsp://61.135.88.174:554/refuse/unavailable_media.wmv
[server] 405 not allowed

Therefore, i have two hypothesis (which i can't verify since i don't have access to your IPTV):

• since the server redirects the client to a path that ends with "refuse/unavailable_media.wmv", it means that the stream is not available at the moment or the client did a wrong setup
• the client tries to setup both a video track and an application track, which contains a proprietary protocol; maybe it shouldn't setup the application track

Does the stream work with VLC? if this is the case, try attaching a network dump of 30 seconds of communication between the IPTV and VLC. Thanks

[zhaibin18]

maybe something wrong with the ISP,I can not play the video from VLC, So please close the issue.

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