UDP NET_ADMIN error on Android app

[Gregoire Gentil]

Hello,

I have added udp-buffer-size=262144 to my pipeline and the net_admin 
permission problem disappears. But now, I'm getting:

PermissionCache: checking android.permission.ACCESS_SURFACE_FLINGER for 
uid=10075 => denied (2263 us)

It's like Android wants to get a system app to do video via GStreamer on 
Android TV. Any clue what's going on?

Grégoire




On 3/22/21 6:29 PM, Gregoire Gentil wrote:
> Hello,
> 
> I'm using gstreamer 1.16.2 in an Android app built with API version 29 
> and NDK 21.1. I'm running that app on Android TV 9 with kernel 4.1.
> 
> I get the strange error message:
> 
> 03-21 19:10:46.896  9080  9223 W GStreamer+udpsrc: 0:00:10.827964588 
> 0xd1507750 ../gst/udp/gstudpsrc.c:1447:gst_udpsrc_open:<udpsrc0> 
> warning: Could not create a buffer of requested 524288 bytes (Operation 
> not permitted). Need net.admin privilege?
> 
> 03-21 19:10:46.897  9080  9223 W GStreamer+udpsrc: 0:00:10.828812588 
> 0xd1507750 ../gst/udp/gstudpsrc.c:1457:gst_udpsrc_open:<udpsrc0> have 
> udp buffer of 262144 bytes while 524288 were requested
> 
> 03-21 19:10:51.996  9080  9223 W GStreamer+rtspsrc: 0:00:15.928045518 
> 0xd1507750 
> ../gst/rtsp/gstrtspsrc.c:5771:gst_rtspsrc_reconnect:<rtspsrc0> warning: 
> Could not receive any UDP packets for 5.0000 seconds, maybe your 
> firewall is blocking it. Retrying using a tcp connection.
> 
> 03-21 19:11:13.472  9080  9223 W GStreamer+rtspsrc: 0:00:37.404373634 
> 0xd1507750 
> ../gst/rtsp/gstrtspsrc.c:5560:gst_rtspsrc_loop_interleaved:<rtspsrc0> 
> error: Could not receive message. (System error)
> 
> 03-21 19:11:13.474  9080  9223 W GStreamer+rtspsrc: 0:00:37.406002134 
> 0xd1507750 ../gst/rtsp/gstrtspsrc.c:6056:gst_rtspsrc_loop:<rtspsrc0> 
> error: Internal data stream error.
> 
> 03-21 19:11:13.474  9080  9223 W GStreamer+rtspsrc: 0:00:37.406265426 
> 0xd1507750 ../gst/rtsp/gstrtspsrc.c:6056:gst_rtspsrc_loop:<rtspsrc0> 
> error: streaming stopped, reason error (-5)
> 
> 03-21 19:11:13.495  9080  9223 W GStreamer+default: 0:00:37.427520719 
> 0xd1507750 ../gst-libs/gst/rtsp/gstrtspconnection.c:1234:write_bytes 
> Operation was cancelled
> 
> 03-21 19:11:13.496  9080  9223 W GStreamer+rtspsrc: 0:00:37.427919303 
> 0xd1507750 ../gst/rtsp/gstrtspsrc.c:6402:gst_rtspsrc_try_send:<rtspsrc0> 
> send interrupted
> 
> 03-21 19:11:13.496  9080  9223 W GStreamer+rtspsrc: 0:00:37.428175428 
> 0xd1507750 ../gst/rtsp/gstrtspsrc.c:8650:gst_rtspsrc_pause:<rtspsrc0> 
> PAUSE interrupted
> 
> 03-21 19:11:13.503  9080  9223 W GStreamer+default: 0:00:37.435170178 
> 0xd1507750 ../gst-libs/gst/rtsp/gstrtspconnection.c:1234:write_bytes 
> Error sending data: Broken pipe
> 
> 03-21 19:11:13.503  9080  9223 W GStreamer+rtspsrc: 0:00:37.435540720 
> 0xd1507750 ../gst/rtsp/gstrtspsrc.c:6400:gst_rtspsrc_try_send:<rtspsrc0> 
> error: Could not send message. (System error)
> 
> 03-21 19:11:13.504  9080  9223 W GStreamer+rtspsrc: 0:00:37.436036929 
> 0xd1507750 ../gst/rtsp/gstrtspsrc.c:8075:gst_rtspsrc_close:<rtspsrc0> 
> error: Could not send message. (System error)
> 
> My pipeline is:
> 
> rtspsrc latency=250 location=rtsp://10.10.10.1:81 ! rtph264depay ! queue 
> ! h264parse ! mpegpsmux ! filesink
> 
> NET_ADMIN privilege is only for system app. Obviously, the device is not 
> rooted. I'm confused why I get such udpsrc error. Note that the second 
> line of the log indicates that it can't get a 512kB buffer but it can 
> get a 256kB. Has anyone got an idea?
> 
> Grégoire