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Detailed explanation of the principle:
The principle of the video player based on FFmpeg, OpenGL, SDL and Qt is as follows:
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FFmpeg library: FFmpeg is an open source multimedia processing library that provides a set of powerful audio and video codecs, format converters and tools. By using the FFmpeg library, audio and video data can be decoded from video files.
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GPU Hard Solution: Modern GPUs (Graphics Processing Units) often have integrated hardware acceleration to efficiently decode video data. By leveraging the hardware decoding capabilities of the GPU, the efficiency and performance of video decoding can be improved.
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OpenGL rendering: OpenGL is a cross-platform graphics rendering API that can utilize the GPU for accelerated graphics rendering. By using OpenGL, the decoded video frames can be rendered to the screen, providing a smooth video playback experience.
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Audio decoding: In addition to video decoding, the audio part also needs to be decoded. The FFmpeg library provides an audio decoder that can decode audio data into raw audio samples.
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SDL library: SDL (Simple DirectMedia Layer) is a cross-platform multimedia development library that provides low-level access to audio, video, input devices, etc. In the video player, the SDL library is used to create windows, handle events and render audio