[Xia Caojun] C++Practical FFmpeg Audio Video Coding Practical Screen Recorder Video Course - based on QT5 and ffmpeg sdk

2-1

Create an mp4 to mov project and call the SDK to open the mp4 file Create vs Project

2-2

Create the context of mov encapsulation format Create and configure audio and video stream information Create and configure AVFormatContext and AVStream

2-3

Write mov video file format header information Avformat_write_header writes mov video file format header information

2-4

Write the video and audio frame data and calculate pts according to the timebase Recalculate pts according to the changed timebase

2-5

The SDK interfaces and structures used for re encapsulation are summarized in the flow chart Explain the relationship between various structures through the flow chart

Click "Only for paying users" to download "mp4_to_mov.zip"

3-1

Explain RGB and YUV Explain RGB storage format and YUV storage format

3-2

Create video encoding project settings and open video encoder Set various parameters of video encoder and explain them in detail

3-3

Complete the creation of video encoding encapsulation context and the addition of video stream information Complete the creation of video encoding encapsulation context and the addition of video stream AVStream information

3-4

Convert video pixel format from rgb to yuv Sws_scale video pixel format conversion from rgb to yuv

3-5

Encoding of video frame written in the head and tail of video encapsulation Av_write_trailer Video encapsulation header and tail write video frame encoding

3-6

Complete video write cleaning and solve AVPacket space leakage Complete the video write cleaning, call av_interleaved_write_frame to write and clean the AVPacket space

Click "Only for paying users" to download "rgb_to_mp4. zip"

4-1

Detailed explanation of audio parameters Detailed audio parameter sampling rate, channel, sample format

4-2

Create and configure an audio encoder Create and configure parameters of audio encoder

4-3

Create the output context of audio encapsulation and write it to the audio file header Avformat_write_header Create the output context of the audio encapsulation Write the audio file header