For the record

For the record:

  • I am married and not looking, so don’t bother emailing me with dating requests.
  • I am not looking for business opportunities.
  • If you have a large sum of money burning a hole in your pocket, feel free to send me some of it, without the silly kerfuffle about expecting me to pay a large fee for your kindness before I get to see any of it.
  • I’m a bloke. My handle “Lisati” is a bad transliteration of “Richard” into the Samoan language, so WATCH IT! Behave yourself!
  • I’ve been using computers of one sort or another for nearly forty years, so don’t try to pull a fast one with what you think you know.
  • If you send me unwanted email, you will be reported. You might even be named and shamed.
  • If you believe your email to me was bounced in error, I can still be contacted.
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VHS to DVD/Blu-Ray

If you’re like me, and you have a lot of video footage on video tape that you want to have on DVD, you might want to take a look at tinkering with the soundtrack to bring it more in line with the soundtrack options available with newer technology. Some cleanup options are available, and, depending on the source material and the amount of time and effort you’re prepared to invest, it’s sometimes even possible to make a simulated 5.1 sound track.

I’d suggest that you take care of making a digital¬† copy of your source material first, and make a backup. Tapes wear out, and sourcing good quality devices to play them on is getting harder – VHS recorders/players haven’t been manufactured for a couple of years now, so you’ll have to do the best you can with what you can find. I have two VHS machines in reasonable working order, both of which are plugged into DVD recorders. You might not be so lucky.

The next step, once you’ve created a digital copy of your source material and a backup, and imported it to your computer, is to make a working copy of your source material.

I find it easier to work on the video first. A minimalist approach works well for initial editing and cleanup, particularly if you’re just starting out with conversion. The goal is to preserve the memories, without necessarily showing off your video production skills, and without losing anything you might want to refer to later. Because I had a habit of reusing camera tapes, I sometimes find short bursts of unrelated material mixed into the footage I review – now is a good time to remove this material from my working copy.

The next step is consider your options for producing a quality soundtrack. At the very least, you should keep a copy of the original soundtrack. The number of people I know with a full home theatre system complete with surround sound are in the minority – many rely on the speakers in their TV, laptop, or phone. As well as this, nearly all of the footage that I recorded prior to 2004 is mono, making it harder to craft a convincing 5.1 soundtrack.

With a 2.0 stereo sound source, it is possible to use the differences between the left and right channels to create a simulation of a 5.1 surround soundtrack. I have described one such process elsewhere.

Converting 2.0 stereo to 5.1 surround

Background

Over the years, I’ve recorded a number of events on my camcorder for other people. In recent months, I’ve made a 5.1 surround sound audio track available on several DVDs I’ve made. Although not as accurate as making a proper mix of material from multiple sound sources, it is possible to create a passable simulation of full surround sound from 2.0 stereo source – this relies on the two stereo channels not being identical, and making use of the differences between the two channels.

Important note: the results you get depends on the quality and nature of your source material and how much effort you are prepared to make. The following notes assume that your source material has a regular two channel stereo soundtrack, as commonly found on CDs and MP3 files. Making an acceptable 5.1 sound mix from a mono source requires a modified approach.

Software

I use Audacity as the basic framework for manipulating the soundtrack on my video files. I have the channel mixer plugin installed, to assist in the remixing process. This is available as a Nyquist Effect Plugin. Depending on the file format you export your remixed soundtrack, you might need to install the ffmpeg import/export library. – don’t forget to set Audacity to export use a custom mix instead of stereo or mono.

Basic procedure

  1. Open Audacity
  2. Import/open your video files – this should give you a two soundtracks organized as as a stereo pair
  3. Normalize your soundtrack with the Effect->Normalize
  4. Duplicate your stereo source so that you four stereo pairs of soundtracks. The first will become the front left and front right channels, the second pair will become the centre channel, the third pair will become your bass/LFE channel, and the fourth pair will become your left rear and right rear channels.
  5. [Optional] Select the first stereo pair, and select the Effect->Vocal Reduction and Isolation effect. For the action, choose remove center. Click on OK. Be patient, this can take a while for longer clips.
  6. Select the second stereo pair, and select the Effect->Vocal Reduction and Isolation effect. For the action, choose isolate center. Click on OK. Be patient, this can take a while for longer clips. Then choose mix->mix tracks to mono.
  7. Select the next stereo pair. Use mix->mix tracks to mono. Then use Effect->Low pass filter. Keep in mind that the LFE channel is commonly designed for freuencies of 120Hz and lower, so you might want to check the setting before clicking OK.
  8. Select the last stereo pair. Lately I’ve been using the channel mixer plugin for this stage of processing. The decoding matrixes described on Wikipedia might be a useful starting place for choosing the values to use. Because Audacity’s plugin uses percentages, you’ll have to multiply the figures on Wikipedia by 100.
  9. You should now have the following: 1 stereo pair, 2 mono tracks, and 1 stereo pair.
  10. Export the resultant mix into your preferred format.

 

D’oh!

My ISP seems to be having a hard time understanding why I’m complaining to them that their spam filter is allowing spam into my inbox but blocking my efforts to report it to places like Spamcop and New Zealand’s Department of Internal Affairs. They also seem to be having a hard time accepting that I am unable to forward copies of legitimate email that has been rejected by their spam filter – I don’t have copies of email that never arrived. My sister and I have pretty much given up trying to communicate by email – she’s a customer of the same provider, and, like me, has discovered that family chit-chat is also being blocked for allegedly being spam.

I am thankful the amount of unwanted emails coming my way has dropped significantly in recent months. I am also thankful that I still have ways of forwarding samples of what I receive to interested parties without resorting to major technical trickery or serious deviousness. I have noticed on the provider’s Facbook page that other customers are being bothered by significantly more spam than myself.

One way of reporting spam when your provider blocks the outgoing spam reports is to have multiple accounts with multiple providers loaded up into your email software, and to send the reports from an account where outgoing reports aren’t blocked, this is easily done with Thunderbird. (Don’t ask me how to do it with the Outlook email client – I haven’t used it regularly for several years.)

Further reading can be found on another blog here: voogdnz.wordpress.com/2017/11/02/what-is-spam/ – while you’re there, you might want to do keyword searches for Spark and SMX.

Coding

The term “Coding” and “computer code” can mean different things to different people. Here are some examples:

  • Source code is a description of how a computer should do a task,¬† in a form that suits being read by people. It usually cannot be directly used by the computer or device, but will normally need to be translated into a form that the computer can use.
  • Escape codes are, in effect, signals sent to a device, such as a screen or printer, to control the device’s settings.

Something that is typed in to the computer isn’t necessarily a code, even though it might seem to be written in code. If you’re typing it on the command line (via cmd.exe on Windows systems, through the terminal on linux machines), it is a command, not a code.

Microcode is another beast altogether. Sometimes the term corresponds to what used to be referred to as BIOS, sometimes it corresponds to device drivers, sometimes it refers to some machine-level stuff that allows a computer’s processor to process machine language stuff properly. In short, the meaning can vary according to context.

Some tech-support forums ask you to use Code Tags around portions of what you submit. This is usually because the forum software will format the information better that way. It does not automatically follow that what you’re submitting is code, it’s more of an aesthetic thing.

Spam spam spam spammity spam…..

It is with some relief that I am pleased to report that Spark has responded to customer complaints and organized a “mark as spam” option for their webmail users. The incarnation I have seen seems to be available only for individual emails that are opened in their webmail, which is a start. Some other ideas for dealing with unwanted email can be found elsewhere.