Скачать или смотреть Resolving the Python not playing Omxplayer video Issue on Raspberry Pi

Discover the solution to the frustrating problem of Omxplayer not playing video in Python on Raspberry Pi. Learn how to fix process hanging issues effectively!
---
This video is based on the question https://stackoverflow.com/q/65567794/ asked by the user 'cool_person_271' ( https://stackoverflow.com/u/14520871/ ) and on the answer https://stackoverflow.com/a/65569404/ provided by the user 'cool_person_271' ( https://stackoverflow.com/u/14520871/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Python not playing Omxplayer video

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Resolving the Python not playing Omxplayer video Issue on Raspberry Pi

Are you struggling to get your Raspberry Pi to play YouTube videos through Omxplayer while using Python? You're not alone! Many developers face challenges when trying to integrate video playback in their applications, especially when using a graphical interface with PyQt. In this guide, we'll explore a common issue that leads to the program hanging and how to resolve it effectively.

The Problem: Omxplayer Not Playing Video

While developing a system where a Raspberry Pi plays a YouTube video inside a PyQt GUI, many users encounter frustrating behaviors where the program just hangs, and the video fails to play. The command that causes this issue is typically something like:

[[See Video to Reveal this Text or Code Snippet]]

This command runs fine when executed manually in the shell but causes the Python script to freeze when initiated with os.system() or similar commands. Let's break down the solution step-by-step.

The Solution: Appending an Ampersand

After experimenting with different methods, such as trying subprocess.Popen() and even creating shell scripts, a simple yet effective solution was suggested by a commenter named Mark. The solution was to append an ampersand (&) at the end of the command. But why does this work? Let's consider the following:

Why Appending & Works

When a command is executed in a terminal with os.system(), it runs the command in the foreground, meaning that the script waits for the command to finish before proceeding. In the case of Omxplayer, it effectively waits for the application to close before continuing, which is the point where many face a hang in their programs.

By adding an ampersand &, you are doing the following:

Run the Command in the Background: This allows the script to continue executing without waiting for Omxplayer to complete.

Avoid Freezing: The parent process (your Python script) doesn’t have to wait for the player to exit, thus preventing the hang.

Implementing the Solution

Here is how you can adjust the block of code to include the ampersand:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes Made:

Ampersand Appended: The critical modification was appending the & to play_command, allowing Omxplayer to run in the background.

Final Thoughts

Utilizing Raspberry Pi for video playback in a Python application can bring numerous challenges, especially when embedding multimedia into user interfaces. However, with simple adjustments such as running commands in the background using an ampersand, these issues can be resolved easily.

Feel free to reach out if you have additional questions or need further clarification about this solution. Happy coding, and enjoy seamless video playback on your Raspberry Pi!