Re-authoring DVDs with Line21 Closed Captioning
Problem: When ripping video from DVD and re-authoring it, the Line21 Closed Captioning (CC2) data is lost.
Solution: Demux to “Headed M2V.”
Notes: With a same-day shipment deadline looming on the clock, I had to remove hissy noise from a DVD and re-burn it before duplicating and sending it out the door. I used MPEG Streamclip to “Demux to M2V and AIFF,” cleaned up the audio in Soundtrack Pro (very handy), and used Toast 8 to re-burn the DVD. The Closed Captioning, however, was gone. After some frantic Googling and guesswork, we tried re-ripping the video using the “Demux to Headed M2V” option as this seems to include more of the original header data from the source. I also noticed that when re-burning in Toast, it merely re-multiplexed the tracks before burning (rather than re-encoding as it had the first time, which I had chalked up to it doing more muxing). This time, the captioning was present.