SCC format subtitles, basically a raw closed caption bitstreams.
After building the first version of the closed-caption decoder, I realized that SCC format would be a more useful format to output in. There are many tools to convert SCC format subtitles into other formats. Additionally SCC captures more of the presentation details of closed captions.
Enjoy.
25 May 2014 Update: An improved version is available see here.
I’ve been backing up my Laserdiscs after the problems I had with my players a month or so back, one thing I frequently noticed was the flicker of closed captions at the very top of the captured video file. This greatly intrigued me, as it would be useful to have subtitles these films. I began investigating software options for decoding the captions embedded in the video image area, but was unable to find anything that worked with video file embedded captions, or was cheap enough to justify spending the money on. Having been intending to do some video-processing work in Python this seemed like an ideal warm-up exercise.
CLV Smear is often mentioned when discussing laserdisc players. I’m currently in the process of writing an enormous article comparing various NTSC comb filters. As part of that I’ve been comparing my various Laserdisc players. After reading about CLV smear I wanted to explore it a bit more and confirm a few facts. I can best describe CLV smear as a tendency for high contrast areas to faintly smear to the right during playback of CLV discs on most Laserdisc players. I’ve seen this being attributed to high frequency boosting applied to the signal from CLV discs by players to increase high frequency response. This boosting is generally not applied to CAV discs (except at the very start) since the high frequency response is generally much better. So – Is CLV Smear real ? Does the player make a difference ? Is it baked into the disc ? Read on… Continue reading