Once you have all of your footage from the lectures you need to begin the capture and edit process. This may seem simple, but it can be the most difficult part of whole process. If you have multiple angles for each presentation then you will need to set one video as the base, and then cut over to the other angles throughout. This base clip should be the one you recorded the master audio to, which was done either through a special microphone or by being connected directly into the live sound mixing. Input that clip into the editing program and lay it down into a sequence. Then place each other angle over that base clip, matching up the audio tracks. Once they are matched up you delete the audio track from the alternate angle because you are only going to be using the single audio track that was recorded with more attention. Once all the other angles are laid over you need to go through every segment of the lecture or presentation and choose the correct angle for the moment. Try to include reactions from the audience, as well as visuals around the room. Make sure to maintain continuity as much as possible with the speakers. Once you have done this you can decide whether or not you would like to include title cards for the speakers, outside footage, or transitions at the beginning and end of the presentation. It is advisable to put audio transitions at the beginning and end because there will most likely be quite a bit of room noise and it is best to ease the audience into this kind of sound environment.