Update readme for anime video models; add video demo (#181)
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docs/anime_video_model.md
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docs/anime_video_model.md
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# Anime Video Models
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:white_check_mark: We add small models that are optimized for anime videos :-)
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| Models | Scale | Description |
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| ---------------------------------------------------------------------------------------------------------------------------------- | :---- | :----------------------------- |
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| [RealESRGANv2-animevideo-xsx2](https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.3.0/RealESRGANv2-animevideo-xsx2.pth) | X2 | Anime video model with XS size |
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| [RealESRGANv2-animevideo-xsx4](https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.3.0/RealESRGANv2-animevideo-xsx4.pth) | X4 | Anime video model with XS size |
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- [Anime Video Models](#anime-video-models)
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- [How to Use](#how-to-use)
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- [PyTorch Inference](#pytorch-inference)
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- [ncnn Executable File](#ncnn-executable-file)
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- [Step 1: Use ffmpeg to extract frames from video](#step-1-use-ffmpeg-to-extract-frames-from-video)
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- [Step 2: Inference with Real-ESRGAN executable file](#step-2-inference-with-real-esrgan-executable-file)
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- [Step 3: Merge the enhanced frames back into a video](#step-3-merge-the-enhanced-frames-back-into-a-video)
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- [More Demos](#more-demos)
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---
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The following are some demos (best view in the full screen mode).
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https://user-images.githubusercontent.com/17445847/145706977-98bc64a4-af27-481c-8abe-c475e15db7ff.MP4
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https://user-images.githubusercontent.com/17445847/145707055-6a4b79cb-3d9d-477f-8610-c6be43797133.MP4
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https://user-images.githubusercontent.com/17445847/145707046-8702a17c-a194-4471-8a53-a4cc44c9594c.MP4
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## How to Use
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### PyTorch Inference
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```bash
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# download model
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wget https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.3.0/RealESRGANv2-animevideo-xsx2.pth -P experiments/pretrained_models
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# inference
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python inference_realesrgan_video.py -i inputs/video/onepiece_demo.mp4 -n RealESRGANv2-animevideo-xsx2 -s 2 -v -a --half --suffix outx2
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```
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### ncnn Executable File
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#### Step 1: Use ffmpeg to extract frames from video
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```bash
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ffmpeg -i onepiece_demo.mp4 -qscale:v 1 -qmin 1 -qmax 1 -vsync 0 tmp_frames/frame%08d.png
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```
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- Remember to create the folder `tmp_frames` ahead
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#### Step 2: Inference with Real-ESRGAN executable file
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1. Download the latest portable [Windows](https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.3.0/realesrgan-ncnn-vulkan-20211212-windows.zip) / [Linux](https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.3.0/realesrgan-ncnn-vulkan-20211212-ubuntu.zip) / [MacOS](https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.3.0/realesrgan-ncnn-vulkan-20211212-macos.zip) **executable files for Intel/AMD/Nvidia GPU**
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1. Taking the Windows as example, run:
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```bash
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./realesrgan-ncnn-vulkan.exe -i tmp_frames -o out_frames -n RealESRGANv2-animevideo-xsx2 -s 2 -f jpg
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```
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- Remember to create the folder `out_frames` ahead
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#### Step 3: Merge the enhanced frames back into a video
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1. First obtain fps from input videos by
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```bash
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ffmpeg -i onepiece_demo.mp4
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```
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```console
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Usage:
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-i input video path
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```
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You will get the output similar to the following screenshot.
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<p align="center">
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<img src="https://user-images.githubusercontent.com/17445847/145710145-c4f3accf-b82f-4307-9f20-3803a2c73f57.png">
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</p>
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2. Merge frames
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```bash
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ffmpeg -i out_frames/frame%08d.jpg -c:v libx264 -r 23.98 -pix_fmt yuv420p output.mp4
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```
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```console
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Usage:
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-i input video path
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-c:v video encoder (usually we use libx264)
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-r fps, remember to modify it to meet your needs
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-pix_fmt pixel format in video
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```
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If you also want to copy audio from the input videos, run:
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```bash
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ffmpeg -i out_frames/frame%08d.jpg -i onepiece_demo.mp4 -map 0:v:0 -map 1:a:0 -c:a copy -c:v libx264 -r 23.98 -pix_fmt yuv420p output_w_audio.mp4
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```
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```console
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Usage:
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-i input video path, here we use two input streams
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-c:v video encoder (usually we use libx264)
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-r fps, remember to modify it to meet your needs
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-pix_fmt pixel format in video
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```
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## More Demos
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- Input video for One Piece:
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https://user-images.githubusercontent.com/17445847/145706822-0e83d9c4-78ef-40ee-b2a4-d8b8c3692d17.mp4
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- Out video for One Piece
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https://user-images.githubusercontent.com/17445847/145706827-384108c0-78f6-4aa7-9621-99d1aaf65682.mp4
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**More comparisons**
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https://user-images.githubusercontent.com/17445847/145707458-04a5e9b9-2edd-4d1f-b400-380a72e5f5e6.MP4
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