H264Experiment

This repo contains several application or tools related to H264 standard

Hello264.c

This maybe the smallest H264 encoder sample in the world.

You can visit here for details.

How to

1. Build the code

   gcc -Wall -ansi Hello264.c -o hello264

2. Perpare the necessary input(YUV rawdata)

   ffmpeg -i <input_compressed_clip> -s sqcif -pix_fmt yuv420p angel.yuv

   For a convenient, I already upload a yuv pic with 16 sqcif frames.

3. Run it

   hello264 < angel.yuv > angel.264

Result

After step 3, you can got your encoded file angle.264 which is larger than the input. Cause in this Encoder, we don't compress anything at all.

RoundTo.c

This is a simple method to calculate the aligned width/height

How to

1. Build the code

   gcc RoundTo.c -o RoundTo

2. Run the binary

   ./RounTo

    Please input the parameters as: ori_width ori_height width_alignment height_alignment 
    <User Input>176 144 64 32
    <Output>aligned_width = 192 aligned_height = 160