Saturday, February 18, 2023

如何制作LOGO

1. 用相关软件制作初步模版。如 www.canva.cn

2. 用 Google Slides 加工, 如叠加别的图片,二维码等等。

    Google Slides 可以把图片 crop 成圆形或其它形状。

3. 用 Photoshop 或 GIMP 制作透明背景,方便把 logo 放别的图上。

    https://itsfoss.com/remove-image-background-gimp/

一般来说,应该有黑色和白色两个版本,用于浅色背景和深色背景。黑色和白色是中性色,搭配别的颜色一般都不错。

Monday, October 25, 2021

ffmpeg commands

Check file info:

- ffmpeg -i <input>
- ffprobe <input>

Output file:

ffmpeg -i <input> -filter:v fps=fps=30 <output>

ffmpeg -i <input> -filter:v fps=fps=30 -b:v 20080k -b:a 201k <output>
ffmpeg -i <input> -filter:v fps=fps=30 -b:v 10040k -b:a 201k <output>

ffmpeg -i 20210113_2_24fps.mp4 -filter:v fps=fps=30 -b:v 20080k -b:a 201k 20210113_3_30fps_2.mp4

ffmpeg -i 20210113_2_bg1.mp4 -filter:v fps=fps=30 -b:v 10040k -b:a 201k 20210113_2_bg1_30fps_tbr10M.mp4

ffmpeg -i love.mp4 -filter:v fps=fps=30 -b:v 20M -b:a 127k love_30fps_tbr20M.mp4


Saturday, June 12, 2021

Sound Interface (声卡)

Sound Interface

Software Mixer

电子钢琴内录

  •  USB-MIDI cable,连接Mac,用garageband录音
  • USB-C -MIDI cable,连iPhone,用garageband录音

声卡

  • Microphon: XLR cable 
  • Piano: aux cable

Wednesday, October 28, 2020

Virtual Camera Software

Webcam driver that uses an image or video file as the video source.

  • Open Broadcaster Studio 
    • Allows you to stream and record many sources layed out in a virtual canvas: you can define sources such as : Images, Video, Your Live Desktop, your microphone, Audio Files, your speaker output.
  • OBS-VirtualCam 
    • Provides a directshow Output as a virtual webcam of the virtual canvas which you have defined from the selected sources. (分辨率640x360,帧率15/second)
  • SplitCamera should work for what you need - Free alternative of ManyCam
  • Other possibilities: fakewebcam.com, altercam

音乐制作软件

  •  Logic Pro X
    • 专业编曲软件 
    • Logic Pro is a digital audio workstation and MIDI sequencer software application for the macOS platform. It was originally created in the early 1990s as Notator Logic, or Logic, by German software developer C-Lab which later went by Emagic. 
    • Wikipedia
    • $199.99
  • Vocaloid Editor (version 5 as of 2020)
    • Vocaloid is a singing voice synthesizer software product. Its signal processing part was developed through a joint research project led by Kenmochi Hideki at the Pompeu Fabra University in Barcelona, Spain, in 2000 and was not originally intended to be a full commercial project. 
    • Wikipedia
    • Standard: $225, Premium: $360