How does Resolve decode h.264 for timeline edit (create missing frames)? In an effort to improve my understanding, a couple of more questions please. The general flow of OpenGL drawing looks like this:ĬGLLockContext() CGLContextObj () // Set the current OpenGL operation context // clear the screen glClearColor(0.0, 0.The dark and mysterious world of codecs can be confusing. The hardware types supported in FFMPEG are defined as follows: enum AVHWDeviceType ] Copy the code 2. Understand the difference between FFMPEG hard decoding and soft decoding Understand the OpenGL rendering process.Understand the difference between FFMPEG hard decoding and soft decoding.The final effect of this section is shown below: ✅ section 1 - Hello FFmpeg ✅ section 2 - Soft unclip video stream, render RGB24 ✅ section 3 - understand YUV ? section 4 - hard decoding,OpenGL render YUV Disk section 5 - Metal render YUV disk section 6 - Decode audio, play with AudioQueue ? section 7 - audio and video synchronization ? Section 8 - Perfect playback control ? Section 9 - double speed play ? section 10 - increase video filtering effect section 11 - audio changesĭemo address of this section: /czqasngit/f.Įxample code is provided Objective-Cwith SwiftTwo implementations, cited for convenience, are Objective-CCode because SwiftCode Pointers don't look neat. For example, iOS/macOS platform supports hardware decoding of H264 and H265, using VideoToolbox to complete QSV based on Intel chip, CUDA based on NVIDA. Hard decoding takes advantage of gPU-specific circuit design, so the number of hard decoding formats supported by gpus on different platforms is limited. Using GPU to complete the decoding of video frames will reduce CPU usage. On the other hand, GPU focuses on the processor with large computation but relatively single task, which has strong parallel computing capability. The CPU is designed to be a functional processor with high flexibility and portability. Hard decoding basically (and here can also refer to specific hardware) refers to the GPU to do the decoding. This section is the fourth section of ffMPEG development player learning notes "Hard Decoding,OpenGL Rendering YUV"
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