Simple x264 Launcher

Simple x264/x265 Launcher is a graphical interface developed with the Qt toolkit for the x264 (H.264/AVC) and x265 (H.265/HEVC) video encoders. The program acts as a front-end that manages and executes encoding processes, facilitating the configuration of complex parameters through a compact and standalone application. It supports frameservers and batch processing.

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• Support for x264 and x265 codecs. The application integrates the x264 and x265 command-line encoders, allowing the generation of video files in H.264/AVC and H.265/HEVC formats. It is possible to select 32-bit and 64-bit versions of the encoders, as well as high bit-depth variants for x265.
• Standalone execution without external dependencies. The program includes all necessary libraries and components in its distribution. It does not require the installation of additional system codecs or plugins for basic operation with supported input files.
• System of predefined profiles and adjustments. It implements the Preset system (ultrafast, fast, medium, slow) and Tuning (film, animation, grain) specific to x264/x265 encoders. This standardizes the configuration of the quality-compression-speed ratio.
• Management of custom configuration templates. Users can save specific sets of encoder parameters as named templates. These templates allow reusing complex configurations without needing to rewrite them manually for each task.
• Support for batch processing with a job queue. It allows creating a list of encoding tasks (jobs) and executing them sequentially. The job queue is maintained between sessions, enabling pausing, resuming, or removing tasks from the list.
• Concurrent execution of multiple encodings. Optionally, several jobs from the queue can be run simultaneously, utilizing the system's hardware resources (CPU) to reduce the total processing time of the queue.
• Integration with Avisynth and VapourSynth. It accepts Avisynth (.avs) and VapourSynth (.vpy) scripts as a video input source. This feature allows advanced video pre-processing (filtering, scaling, correction) before the encoding stage.
• Mixed compatibility of bit architectures. Possibility of using a 32-bit Avisynth or VapourSynth script together with the 64-bit x264 or x265 encoder, and vice versa. This overcomes compatibility limitations of specific plugins.
• Command-line interface for adding jobs. New jobs can be added to the processing queue from the system console or from external automation scripts, by passing specific arguments and parameters to the executable.
• Advanced custom parameters for the encoder. In addition to the graphical interface controls, there is a field to add direct command-line options to the encoder. This enables access to experimental functions or parameters not exposed in the GUI.
• Cross-platform graphical interface with Qt. The application uses the Qt toolkit for its user interface, which ensures consistent appearance and behavior across different operating systems (Windows, Linux) and facilitates its maintenance.
• Monitoring of the encoding process. During the execution of a task, the main window displays real-time information: completion percentage, frames per second (FPS), estimated file size, elapsed time, and remaining time.
• Detailed audio and container configuration. It allows specifying audio encoding parameters (for example, using AAC or copying the original stream) and selecting the output container format (MP4, MKV, FLV, MPEG-TS).

The development of Simple x264/x265 Launcher began around the year 2010. The program was initially created by the developer known as LoRd_MuldeR, who maintains the MulderSoft website. The application is primarily written in the C++ programming language, using the Qt framework for the implementation of the graphical user interface (GUI).

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