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Troubleshooting

This page is frozen. Please use Github > Issues instead.

Security Restriction

Binary signature

Since the binary of ArrowDL is not signed, Windows SmartScreen might scream at runtime.

Just ignore it.

Secure Sockets Layer (SSL)

To download resources through HTTPS (Secured HTTP) protocol, The Qt5's QtNetwork requires access to a SSL (Secure Sockets Layer) library.

However Qt doesn't publish the OpenSSL libraries due to legal restrictions in some countries. Then, at runtime, when Qt doesn't find the libraries, it generates SSH Protocol errors when trying to connect to HTTPS servers.

To solve the problem, copy your OpenSSH libraries in the same directory as your ArrowDL executable. You can also add the path to your OpenSSH libraries to your system environment path variable (PATH).

Firewall ports

ArrowDL downloads resources using HTTP and HTTPS protocols.

To do it, configure your Firewall to allow ArrowDL to use the following TCP ports:

  • TCP/80 (used for HTTP protocol)
  • TCP/443 (used for HTTPS protocol)

Fatal crash when starting the Wizard on MSVC builds (Windows only)

Issue

ArrowDL built with MSVC 2019 and Qt 5.13 (MSVC version) crashes when opening the web site downloader wizard.

Rem: ArrowDL built with MinGW doesn't have this issue.

Explanation

Appveyor-CI doesn't deploy all the required DLLs for Chromium.

Solution 1

In ./qt.conf, set Prefix with the full path to your local Qt5 directory:

[Paths]
Prefix=./

Example:

[Paths]
Prefix=C:/Qt/Qt5.13.2/5.13.2/msvc2017_64/

Solution 2

Add the missing DLLs, EXE and qt.conf, in the app directory, as explained here:

https://doc.qt.io/qt-5/qtwebengine-deploying.html

Can't launch: "system lookup error" (Linux only)

Error occuring:

./ArrowDL
$ ./ArrowDL: system lookup error: ./ArrowDL undefined symbol _ZN8QSysInfo8buildAbiEv

The executable can't find some shared libraries, or the shared libraries (used for build) are different than the shared libraries called at runtime.

For example, you build with Qt 5.4.1 (/opt/Qt5.4.1/5.4/gcc/lib) but the runtime finds Qt 5.2.0 (/usr/lib/i386-linux-gnu/libQt5Core.so.5).

Look for the Runtime Search Path (RPATH):

readelf -d ./ArrowDL | grep NEEDED
$ 0x00000001 (NEEDED)   Shared Library: [libQt5Widgets.so.5]
$ 0x00000001 (NEEDED)   Shared Library: [libQt5Network.so.5]
$ 0x00000001 (NEEDED)   Shared Library: [libQt5Gui.so.5]
$ 0x00000001 (NEEDED)   Shared Library: [libQt5Core.so.5]
$ 0x00000001 (NEEDED)   Shared Library: [libstdc++.so.6]
$ 0x00000001 (NEEDED)   Shared Library: [libm.so.6]
$ 0x00000001 (NEEDED)   Shared Library: [libgcc_s.so.1]
$ 0x00000001 (NEEDED)   Shared Library: [libc.so.6]

readelf -d ./ArrowDL | grep RPATH
$ 0x0000000f (RPATH)    Library rpath: [$ORIGIN]

ldd ./ArrowDL | grep "not found"
$ libQt5Widgets.so.5 => not found

Solution 1

Set the correct runtime path with LD_LIBRARY_PATH:

LD_LIBRARY_PATH=/opt/Qt5.4.1/5.4/gcc/lib ./ArrowDL

Create a ArrowDL.launcher to set the correct path, or a script:

```bash
#!/bin/bash
LD_LIBRARY_PATH=/opt/Qt5.4.1/5.4/gcc/lib
export LD_LIBRARY_PATH
./ArrowDL
```bash

Solution 2

Build with the same Qt version as installed.

source: Understanding Dynamic Loading

Can't download streams (Linux only)

Issue

When clicking "Help" > "About YT-DLP...", the box shows:

Error:
The process has encountered an unknown error.

Open a terminal, go to the application directory and run:

./yt-dlp --version
$ /usr/bin/env: 'python': No such file or directory

Explanation

On Linux, yt-dlp requires the Python libraries to run.

Check that:

which python
$ /usr/bin/python

If the command returns an empty line, it means the package python (Python2) is not installed, or Python3 only is installed.

Solution 1

Install Python 2.

Solution 2

If you want to use Python 3 instead of Python 2, and have Python3 installed:

which python3
$ /usr/bin/python3

Open yt-dlp with a text editor and replace the first line #!/usr/bin/env python by #!/usr/bin/env python3 (note the '3'):

head -n 1 ./yt-dlp
$ #!/usr/bin/env python
                 ^^^^^^

cp ./yt-dlp ./yt-dlp-OLD
sed -i 's/python/python3/' ./yt-dlp

head -n 1 ./yt-dlp
$ #!/usr/bin/env python3
                 ^^^^^^^