898256d416
This adds a circular buffer to ffmpeg-mux when writing to a file. Output from ffmpeg is buffered so that slow disk I/O does not block ffmpeg writes, as this causes the pipe to become full and OBS stops sending frames with a misleading "Encoding overloaded!" warning. The buffer may grow to 256 MB depending on the rate of data coming in and out, if the buffer is full OBS will start waiting in ffmpeg writes. A separate I/O thread is responsible for processing the contents of the buffer and writing them to the output file. It tries to process 1 MB at a time to minimize small I/O. Complicating things considerably, some formats in ffmpeg require seeking on the output, so we can't just treat everything as a stream of bytes. To handle this, we record offsets of each write and try to buffer as many contiguous writes as possible. This unfortunately makes the code quite complicated, but hopefully well commented.
OBS Studio <https://obsproject.com> =================================== .. image:: https://github.com/obsproject/obs-studio/actions/workflows/main.yml/badge.svg?branch=master&event=push :alt: OBS Studio Build Status - GitHub Actions :target: https://github.com/obsproject/obs-studio/actions/workflows/main.yml?query=event%3Apush+branch%3Amaster .. image:: https://d322cqt584bo4o.cloudfront.net/obs-studio/localized.svg :alt: OBS Studio Translation Project Progress :target: https://crowdin.com/project/obs-studio .. image:: https://img.shields.io/discord/348973006581923840.svg?label=&logo=discord&logoColor=ffffff&color=7389D8&labelColor=6A7EC2 :alt: OBS Studio Discord Server :target: https://obsproject.com/discord What is OBS Studio? ------------------- OBS Studio is software designed for capturing, compositing, encoding, recording, and streaming video content, efficiently. It's distributed under the GNU General Public License v2 (or any later version) - see the accompanying COPYING file for more details. Quick Links ----------- - Website: https://obsproject.com - Help/Documentation/Guides: https://github.com/obsproject/obs-studio/wiki - Forums: https://obsproject.com/forum/ - Build Instructions: https://github.com/obsproject/obs-studio/wiki/Install-Instructions - Developer/API Documentation: https://obsproject.com/docs - Donating/backing/sponsoring: https://obsproject.com/contribute - Bug Tracker: https://github.com/obsproject/obs-studio/issues Contributing ------------ - If you would like to help fund or sponsor the project, you can do so via `Patreon <https://www.patreon.com/obsproject>`_, `OpenCollective <https://opencollective.com/obsproject>`_, or `PayPal <https://www.paypal.me/obsproject>`_. See our `contribute page <https://obsproject.com/contribute>`_ for more information. - If you wish to contribute code to the project, please make sure to read the coding and commit guidelines: https://github.com/obsproject/obs-studio/blob/master/CONTRIBUTING.rst - Developer/API documentation can be found here: https://obsproject.com/docs - If you wish to contribute translations, do not submit pull requests. Instead, please use Crowdin. For more information read this thread: https://obsproject.com/forum/threads/how-to-contribute-translations-for-obs.16327/ - Other ways to contribute are by helping people out with support on our forums or in our community chat. Please limit support to topics you fully understand -- bad advice is worse than no advice. When it comes to something that you don't fully know or understand, please defer to the official help or official channels.