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JWG Design

6502
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    http://www.jwgdesign.com

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  • Location
    Massachusetts, USA
  • Interests
    Music, Hockey, Computers, Videography, Photography
  1. I feel like a complete dufus. It's been a while since I've posted anything on bulletin boards, and now I've managed to do it wrong. I messed up the italics BBCode in my previous post and now phpBB won't let me edit the post to make the correction. Very frustrating. I must be missing something obvious. Is it because the thread is a Sticky?
  2. Thanks for the info about problematic caps. I've got a Duo 280c that needs inspection for this problem. The full Dock had the clicking problem a long time ago, but I never replaced the PSU caps. I did not think it was an operation I could handle myself. More recently, I recapped the PSU in my TiVo DVR, and that was rather easy. The Powerbook disassembly is a bit more intimidating, but I can handle it if I can find a clean surface to work on. Can someone tell me if these issues are symptoms of the bad caps? The Duo runs fine when the battery is inserted and the power supply is connect
  3. Hi, Jim. I'm glad you enjoyed the article. Yes indeed, I have been running GB2 on my Pismo 500. I recently upgraded the internal drive to a 100GB Western Digital Scorpio, and that seemed to make a nice speed improvement in overal system performance. I am also now running Tiger. The Pismo shouldn't have any trouble recording multiple tracks at the same time, as long as there are no real-time effects being applied. I have used my Pismo (and also a Sawtooth G4/400 and a Sawtooth G4/450) to record two guitars at the same time. My setup included each guitar plugged into an amp, with a
  4. I've only done a direct serial connection with a terminal program like Z-Term or the Communications mode of ClarisWorks. In that situation, you'd need to select Null Modem Cable from the list of modems. If you are using PPP, then you would also have to select Null Modem Cable. The "server" computer would have to have some software running to accept the connection and assign the client an IP address. I'm not sure how that would be done.
  5. I don't have any experience with HDV, but I think it uses the same 25Mbps data rate as regular DV. The trouble with HDV is that it uses heavier MPEG compression instead of the simpler compression used in DV. I have had success capturing and editing DV with iMovie 1 (2?) on a Powermac 8500/120. I will say that my Pismo and Sawtooth are much better at editing DV. I think the extension referenced earlier might be called the PCI Timing Extension.
  6. The accepted desktop video resolutions have been NTSC at 640x480 or PAL at 768x576. Other resolutions simply divided one (or both) of the dimensions in half to reduce data size. Television standards do not have a resolution of 800x600. Your computer would have to create extra pixels. The results would be bad - slow frame rate and jagged image. If you had a HDV camera and a FireWire card in your Powermac, then you shouldn't have any trouble transferring 720p or 1080i High-Def video into your Mac. Editing it would be a different story. Apple recommends a 1GHz G4 for HDV editing in i
  7. Congrats on getting the Duo on the net. That is a rather clever solution. Perhaps it isn't as fast as ethernet, but it could still be quite fast. Back when I first got DSL (and before hardware routers were affordable), I ran IPNetRouter on my Quadra 840av to share the DSL between several Macs and a PC. Most of the computers were on ethernet, but my Powerbook Duo 280c was on LocalTalk. The Quadra must have been able to pump up the serial port speed past what was normal for the Duo, because the Duo could download files via FTP at around 80KB/sec. That is equal to 640kbps, which is mu
  8. From what I can surmise from this discossion about Li-Ion batteries, there are the cells, which can have between 0-100% charge, and then there is the circuitry that allows something like a 10-100% charge. (I'm just guessing that 10% might be the safe bottom figure here, as TomLee mentioned that Li-Ion cells should never be fully discharged.) So if the circuitry thinks that the battery is at 10%, it will turn off the Powerbook -- regardless of the actual charge left in the cells. If you plug in the 'book, then the battery will begin to charge, but probably stop when the cell charge reache
  9. I just created a new thread for the Cinepak vs. Motion-JPEG discussion, since it seems better categorized as a Software topic. > http://68kmla.org/forums/viewtopic.php?p=11816 John
  10. I'm fairly certain that the version Apple includes in Quicktime has not changed. Apple licensed the technology from Supermac, the makers of VideoSpigot capture cards. I guess Supermac was aquired by Radius, which subsequently went out of business. At some point CTI must have purchased the rights to Cinepak, either from Supermac or Radius. About seven years ago, I tested the CinepakPro Toolkit (the only way to use the CinepakPro codec), but I wasn't too impressed. I thought that MovieCleaner (now Cleaner) had better features. Furthermore, the sample videos are not even appropriate for
  11. I don't think the Cinepak codec has changed at all since Quicktime 2.5. MoviePlayer is just the front-end. If you use MoviePak or Cleaner, it still uses Quicktime's Cinepak encoder, but gives you some additional options for changing the video before sending it to the encoder. Some options are variable frame rate (dropping duplicate frames) and adaptive noise reduction. From my experience, using QuickTime Player with QuickTime 7 Pro produces identical results as using MoviePlayer with Quicktime 2.5. The biggest differences come with changing the data rate. Also, the consensus from long
  12. Cinepak's motion estimation was best at camera panning, or linear motion. Things like camera zooming do not fair well with Cinepak at low data rates. Tomlee, you have gotten me curious about this strange phenomenon. I don't understand why Cinepak is performing poorly compared to Motion JPEG (MJPEG). Cinepak is ideally suited for 320x240 at 15fps and roughly 100-300 KB/sec. (video only), although it performs fairly well with some slight variations. For instance, I like to use 320x180, 10fps, 80 KB/sec for my 16x9 web videos. MPEG-1 is well suited for 352x240 at 30fps, and will produ
  13. To clear things up and avoid confusion... I am not Mark White. I did help Mark with the MpegDec project, but only in small ways -- beta testing, icon design, and web design/hosting. It's too bad MpegDec has that MP2 bug. (There were screeches and other noises in the AIFF, when I tested it yesterday on my G4 in Classic.) MpegDec seems to be much faster at conversion than MPEG Audio Coder. I had forgotten that SoundApp will do the conversion on 68k Macs -- and quickly, IIRC. Thanks, Norman Franke. The big trick to Cinepak is keyframes. With MJPEG, every frame is a keyframe and is
  14. If you're going to do the conversion on the LC, this is the procedure: 1. Use MPEG Splitter to split the audio and video into separate files. 2. Open the video file (.m1v) with Sparkle. 3a. File>Save As... to export the video to Quicktime 3b. Set the frame rate to 10 or 15. 3c. Set the codec to None, Component, or PhotoJPEG 4. Use MPEG Audio Coder to decode the audio file (.m1a) to AIFF. 5. Open your QT video file with MoviePlayer. 6. Select all the video then Copy. 7. Open your AIFF file with MoviePlayer. 8. Hold Option, and choose Edit>Add 9. File>Save As... a referenc
  15. Alk is correct in that 68k Macs cannot decode MPEG-1 video in real-time without a hardware decoder. There is a software decoder that allows conversion from MPEG-1 to Quicktime. It is called Sparkle. It also comes with an MPEG splitter and an MPEG-2 decoder. > http://www.umich.edu/~archive/mac/graphics/graphicsutil/sparkle2.45.sit.hqx The conversion won't be fast on an LC, but it should work. MPEG decoding is very processor intensive, and so is Cinepak encoding. If the video is in color, then leave Cinepak's settings at Millions of Colors (24-bit). Cinepak will not be any m
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