Introduction
What you need?
Step 1: Add files before HD to SD conversion.
Step 2: Choose profile, destination and settings.
Step 3: Convert HD video to SD.
Next part 1: How to trim, crop, edit video, and capture picture?
This detailed tutorial below is designed to help you get started using 4Videosoft HD Converter to accomplish conversion from HD to SD, from SD to HD, or between almost all popular video formats even high definition video for playback on your portable multimedia players. This software not only performs as a conversion tool but also as powerful editor. How to perform these functions is included in the following 2 parts.
Knowledge: What's HD
High-definition video or HD video refers to any video system of higher resolution than standard-definition (SD) video, and most commonly involves display resolutions of 1280×720 pixels (720p) or 1920×1080 pixels (1080i/1080p).
Software: 4Videosoft HD Converter
OS Supported: Windows NT4/2000/2003/XP and Windows Vista, Windows 7
Hardware Requirements: 800MHz Intel or AMD CPU, or above; 512MB RAM or more
First, it is necessary to download, install and run the software.

After launching the HD Video Converter, click button "Add File" on the toolbar, a dialog pops up for choosing video files to the program. Almost all kinds of videos are supported including high definition videos.
If you want to delete some video files which have been added, just select the video and click button Remove.
Step 2: Choose profile, destination and settings
4Videosoft HD Converter can convert to HD videos to various formats and play on different devices. Under “Profile”, click the drop down arrow and choose what you want format from the list. Click “Browse” and find a folder to place your converted files.

Tip:
You can choose audio track and subtitle
Go to Settings panel and do some settings for video conversion. You may also do some other settings like video Encoder, frame rate, audio Channels and more parameters before you convert HD video.

Step 3: Convert HD video to SD
Click
button on the toolbar to start HD to SD or HD to HD conversion process.
4Videosoft HD Converter also provides you to trim video, crop play area, capture the picture, you can learn it from How to trim, crop, edit video, and capture picture?