MPEG Encoder

NTU CSIE ITCT 2017 Spring Final Project

Benchmark Video

To create and playback a raw video, we use ffmpeg and ffplay.

ffmpeg -i input.mp4 -vcodec rawvideo -pix_fmt rgb24 output.rgb  # generate raw video

ffplay -f rawvideo -pix_fmt rgb24 -video_size 720x480 -i raw.rgb  # playback raw video

To convert from RGB file to H.264 format file, we use ffmpeg again.

ffmpeg -f rawvideo -pix_fmt rgb24 -s:v 854x480 -r 25 -i input.yuv -c:v libx264 -f rawvideo output.264

RGB File

A file with extension .rgb is an RGB file. It does not contain any header. For example, snoopy.rgb is a RGB file with resolution 854x480, and each pixels contains 1 byte of red followed by 1 byte of green and followed by 1 byte of blue.

Intra Prediction

There are 2 sets of intra prediction modes, one is 16x16 luma prediction modes, and the other is 8x8 chroma prediction modes.

Reference:

• H.264/AVC Intra Prediction
• Fast Intra-Prediction Mode Selection for H.264

Core Transform & Quantization

Reference:

• H.264/AVC 4x4 Transform and Quantization
• H.264 學習筆記（四）—— 變換與量化(ZT)
• H.264 中整數DCT變換，量化，反量化，反DCT究竟是如何實現的？
• Hadamard 變換中的歸一化問題

CAVLC

Reference:

• CAVLC Encoding Tutorial - The Wobbly Cucumber

Book Reference

• Next-Generation Video Coding and Streaming
• Next-Generation Video Coding and Streaming -- Wiley Online Library
• 新一代視頻壓縮編碼標準H.264