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comment by Devac
Devac  ·  257 days ago  ·  link  ·    ·  parent  ·  post: 0.2078795763

    h.264, which is the protocol most cameras record to, isn't even synchronous. There's no mandated field length within the codec. Which means for those of us who record audio, h.264 will drift by at least a frame after less than 5 minutes of recording. More than ten minutes and you can be off by three frames or more. After that it's all kinda wooly; the video recording is dumping data where it fits and speeding up or slowing down to make the audio work.

Thanks! I was vaguely aware of that, but never really noticed. As I said earlier, my recordings are usually under fifteen minutes. Plus I'm not recording my face, so it's not like I can realistically estimate how much my mouth and voice desync. Few frames here or there aren't much when discussing physics. But if what you say is true, forty minutes would probably look like complete shit. Hundred millisecond difference is probably bearable in my wannabe Khan Academy format, but extrapolating from your numbers it would get to be around full second(s) by the end. That's indeed too much.

    Meanwhile it's spitting out a secondary path for monitoring which Windows is playing with asynchronously as well. Linux is no better.

Hah. I know, codecs and their standards don't really depend on the OS (to my knowledge at least, I'll gladly be corrected). They can be harder to implement or port, but it's largely independent. That's, again, my annoyance showing.

But I'm not gonna lie, after years of people telling me that you can't do anything with video on Linux and the second ever recording that I made on Windows went tits up (and first wasn't really a success either)… I felt a kind of a vicarious pleasure at this failing. Lizard brain of sorts, I guess. Bit shame that at my expense though ;).

    If you're using a webcam it doesn't much matter because we accept that webcams are going to be shit. But if you're recording, you're in for a bad time.

If that's the case, are there any affordable solutions? Baring in mind that I live quite comfortably while making about 480-500 USD per month in total (that is stipends + tutoring) and the fact that in Poland most of the specialist electronics are about 10-30% more expensive on average. Would a mid-tier camera on a tripod recording on memory card cut it, or am I in a wrong ballpark?

No rush. I'm mainly just curious. It's not like I'm recording more than maybe two or three hours per month. That said, if I would get some sensible job for my senior year it wouldn't hurt me to get at least acquainted with quality video work and editing.

Thank you in advace!




kleinbl00  ·  257 days ago  ·  link  ·  

The cheapest thing to do is learn to cut every minute or so. Next time you watch a show on television, pay attention to how often they switch angles or change scenes. It's actually pretty atypical to go longer than six or seven seconds without cutting to a different angle.

I recognize that this approach doesn't work for streaming screencasts but if you can find places to stop and start it'll improve your flow and save you money.