Hello, and thanks in advance for your help on the following.
I'm in the process of digitizing some Hi8 tapes. Here are my questions:1. Picture Noise -- DV vs Huffyuv
After passing the analog signal (S-video) through a Canon GL2 Mini-DV camcorder and capturing the resulting dv-avi via firewire, I noticed that the resulting picture appears somewhat "noisy." That is, areas of solid color appear somewhat "noisy" rather than "smooth." Is this due to the DV intra-frame compression? Would I be better off buying a high-quality capture card (e.g. PDI Deluxe
or please suggest one) and encoding the capture using a lossless codec such as Huffyuv? How much cpu power does it take to encode to Huffyuv (i.e. what are the minimum processing requirements)?2. Which dv-avi filetype?
Assume I plan to capture the video as dv-avi for archival and dvd-authoring (or possible editing), using yet-unknown editing software. Which dv-avi type (Type 1 or Type 2) is recommended for this purpose? That is, which is most universal? Is there any advantage to the "raw dv" format offered by dvgrab?
Is it just as easy to rejoin segmented video (i.e. assuming the capture software outputs 1GB chuncks, say) of either type? Is it necessary to rejoin the files before DVD authoring (assuming no editing is desired)? Are there free software tools capable of rejoining either type of dv-avi?
Also, what's the reason that dv-avi type 2 plays back fine on Windows VLC, but on Linux (in both mplayer and VLC), the aspect ratio is wrong (i.e. there are thicker black bars at the top and bottom, and the picture is squashed)? Note that this does not happen with dv-avi type 1.3. Which capture software?
I've used both WinDV and dvgrab, and I'm satisfied with either (no plans to use anything else unless there's a quality advantage). If WinDV doesn't have a particular advantage over dvgrab, I'll probably just stick to linux and use dvgrab. Is there any reason why I should use WinDV over dvgrab? I noticed that WinDV reports "dropped frames," whereas dvgrab reports "damaged frames." What's the difference? Also, what does either of these tools do upon encountering a blank spot (unrecorded spot) on the Hi8 tape?4. Problem with Hi8 Playback
I noticed that when I stop playback on my Hi8 camcorder in the middle of a tape, and then rewind the tape a bit before starting playback again, there sometimes appears a horizontal line disturbance in the picture, that slowly moves up and out of the screen. This disturbance seems to have become part of the tape, as it now always appears in the same place on the tape. Has anyone ever heard of this before? Suggestions?5. Writing and Reading from Hard Drive Simultaneously
I'm using an old computer to conduct these Hi8 digitizations. My hard drive tends to fill up with dv-avi chunks during video capture via FireWire. Is it OK if I dump some of these chunks (i.e. chunks that are already completed) to an external hard drive via USB 1.1 as more data is being captured through the FireWire? (I realize the dumping will be much slower than the gathering, but I figured it will work out as long as I started dumping early in the process.) Is there any danger that the new data coming in through FireWire could be messed up due to the hard drive sending stuff out via USB at the same time?