benzea/gnome-network-displays

Black screen with error "no session"

b1oki opened this issue · 3 comments

b1oki commented

From comment #105 (comment)

Error description from comments

MiraScreen dongle writes "Do RTSP connection", than black screen. After about one minute disconnect.

gnome-network-displays window message "starting streaming": image

Last output from gnome-network-displays debug:

0:00:45.110326545 162143 0x560571fd0b00 INFO         GST_REFCOUNTING gstelement.c:3333:gst_element_finalize:<wfd-encoder-bin> 0x5605721ac930 finalize parent
0:00:45.110356366 162143 0x560571fd0b00 ERROR             rtspclient rtsp-client.c:2692:handle_setup_request: client 0x560571f8f420: media '/wfd1.0/streamid=0' not found
0:00:45.279725247 162143 0x560571fd0b00 INFO              rtspclient rtsp-client.c:3533:handle_request: client 0x560571f8f420: received a request PLAY rtsp://10.42.0.1:7236/wfd1.0/streamid=0 1.0
0:00:45.279773016 162143 0x560571fd0b00 ERROR             rtspclient rtsp-client.c:1870:handle_play_request: client 0x560571f8f420: no session

Wireshark capture screenshot: image

File from Wireshark: miracast_no_session.pcapng.gz

Hardware

wifi adapter

description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 01
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.6.11-050611-generic firmware=N/A ip=192.168.43.92 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:16 memory:f4000000-f400ffff

p2p interface

p2p-wlp2s0-13: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.42.0.1  netmask 255.255.255.0  broadcast 10.42.0.255
        inet6 fe80::122c:5200:a073:706  prefixlen 64  scopeid 0x20<link>
        ether 1a:f4:6a:15:dd:6f  txqueuelen 1000  (Ethernet)
        RX packets 68  bytes 12978 (12.9 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 134  bytes 28020 (28.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Answer

@benzea #105 (comment)

The problem seems to be:

0:00:52.851053205 148156 0x7fa2a0062760 ERROR             rtspclient rtsp-client.c:2692:handle_setup_request: client 0x5580233e33f0: media '/wfd1.0/streamid=0' not found

But I can't see why that would happen. Comparing with an example that works, the only difference seems to be that your client includes the port number, which seems sane.

Though … there is this thing message:

0:00:52.850991823 148156 0x7fa2a0062760 INFO         GST_REFCOUNTING gstelement.c:3333:gst_element_finalize:<wfd-encoder-bin> 0x5580235cb840 finalize parent

Which I find rather suspicious. So maybe something else goes wrong earlier an the media simply disappears. And then it is correct that GStreamer cannot find the media.

b1oki commented

My plan:

  • Attach debug output and wireshark capture file when "no session"
  • Attach debug output and wireshark capture file when successful streaming
benzea commented

I would like to see the full log using G_MESSAGES_DEBUG=all from the start. This still doesn't make any sense to me, and I feel like I might be missing some important piece in the puzzle.

It looks like the pipeline just falls apart directly after prerolling. But I have no idea why that might be happening.

b1oki commented

I would like to see the full log using G_MESSAGES_DEBUG=all from the start. This still doesn't make any sense to me, and I feel like I might be missing some important piece in the puzz

gnome-network-displays_failure.log.gz

gnome-network-displays_failure.pcapng.gz

gnome-network-displays_success_0.log.gz

gnome-network-displays_success.log.gz

gnome-network-displays_success.pcap.gz