[Help Needed] scrcpy-server on Android hangs

[r-luo]

• I have read the FAQ.
• I have searched in existing issues.

Environment

• OS: Ubuntu 20.04
• scrcpy version: 1.17
• installation method: linuxbrew
• device model: Huawei Mate 20 Pro (connected to adb wirelessly via atx-agent)
• Android version: 10

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Hi,

I'm trying to stream my phone screen into Python. I found this script https://gist.github.com/Allong12/a752decf49e6c789c2425e35028137a5 from way back in 2019 and tried to modify it. However, the server would freeze whenever I try to receive anything with sock.recv in Python.

Things done in Bash (Not even sure if my arguments for scrcpy-server even make sense..):

wget https://github.com/Genymobile/scrcpy/releases/download/v1.17/scrcpy-server-v1.17
cp scrcpy-server-v1.17 scrcpy-server.jar
adb -s 192.168.50.229:5555 push scrcpy-server.jar /data/local/tmp/
adb -s 192.168.50.229:5555 shell CLASSPATH=/data/local/tmp/scrcpy-server.jar app_process / com.genymobile.scrcpy.Server 1.17 info 960 1073741824 60 -1 true - false true 0 false false - -

The above would hang at

[server] INFO: Device: HUAWEI LYA-L0C (Android 10)

And I had to open another shell process to run

adb -s 192.168.50.229:5555 forward tcp:8080 localabstract:scrcpy

Now in Python:

import socket
import struct
import sys
import subprocess
import io

IP = '127.0.0.1'
PORT = 8080

print("Connecting")
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((IP, PORT))


DUMMYBYTE = sock.recv(1)
if not len(DUMMYBYTE):
    print("Failed to connect!")
    exit()
else:
    print("Connected!")

It'll print "Connected!" as a dummy byte is received. However, any subsequent call to sock.recv would hang in python:

deviceName = sock.recv(64)
print("Device Name:",deviceName.decode("utf-8"))

^ this hangs.

I'm wondering if anyone can help me understand what's going on / help me make it work... Thanks in advance!

[rom1v]

Now, you have to connect 2 sockets (1 for video, 1 for control in both directions): ec71a3f

Refs #129 (comment)

[r-luo]

@rom1v Thanks so much for your response!

Unfortunately I'm pretty illiterate in networking so I'm not sure what I should do to make it work after reading the links you provided... Would you mind offering some possible changes I can make to the code above in order to receive screenshots from scrcpy-server started on the phone?

[Bujuhu]

Hi!

This is probably what you are looking for.

Or you could use use the class provided by py-android-viewer directly if you don't want program the networking bit yourself

[r-luo]

Hi!

This is probably what you are looking for.

Or you could use use the class provided by py-android-viewer directly if you don't want program the networking bit yourself

OMG it works perfectly. Thank you so much!!! You just made my day 😁