| This is the VP8 Alpha Encoder which can produce VP8 videos with alpha channel |
| from raw AYUV videos. |
| |
| To convert an avi/vp6a video with alpha into raw ayuv video, use: |
| ffmpeg -i <input_file> -f rawvideo -c:v rawvideo -an -pix_fmt yuva420p raw.out |
| |
| Make sure to note the width and height in the output. |
| |
| Then, you can encode the raw file with VP8 along with the alpha using: |
| ./alpha_encoder -w <width> -h <height> -i raw.out -o vp8alpha.webm |
| |
| Various supported options can be found by running: |
| ./alpha_encoder -? |
| |
| The design doc of how this works can be found here: http://goo.gl/wCP1y |
