For clear lecture delivery Videos must be free of errors in both screen and audio. Please create your lectures with attention to the following points.
When text is difficult to read
Point subtitles, handwriting, and other text appearing on screen should use appropriate fonts and handwriting to be clearly readable.
Recommended fonts
Download the compressed file below to install the Pretendard font.
When adding speech subtitles to videos
In the CLASS101 webpage learning environment, speech subtitles are automatically inserted at the bottom of the screen. Please do not insert them directly into the video to avoid overlapping subtitles.
When the UI is small
Please make the UI size larger to clearly deliver the lecture and ensure there are no inconveniences in learning.
When there are black borders or lines in the video
To help classmates focus on the class content, please fix any unintended black borders or lines on the learning screen.
When CLASS101 is mispronounced or misspelled
CLASS101 should be pronounced as Class One Oh One and written as CLASS101 without spaces.
When lip movements and audio are out of sync
Please ensure that lip movements on screen match the timing of the spoken words.
When audio comes from only one side
Sound should come from both speakers, not just one side.
When audio cuts out
Audio should not cut out in the middle and make the lecture delivery unclear.
Please edit so that speech doesn't suddenly cut off in the middle.
When audio volume is uneven
Sound levels should be consistent across all lecture videos, with no specific parts being too loud or too quiet.
If the sound is too loud or too quiet, adjust it using an audio mixer device.
Especially when the sound is loud, adjust it so it doesn't reach the peak (red indicator).
When there is excessive noise, sound interference, or echo in the audio
Noise, sound interference, echo, etc. should not interfere with lecture delivery.
When there is excessive noise, sound interference, echo, etc., improve the audio using the following methods.
For Premiere, 'Effects' → 'Audio Effects' → 'Noise Reduction/Restoration' → 'DeNoise or DeReverb'
When background music is inserted
Background music is not used in all classes except for trailers, to ensure accurate delivery of the lesson.
Please make sure to check if commercial use is allowed before using it.