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My favourite is when the motion sickness enhancer is turned up to max and the entire backlight is dimming up and down because of dynamic contrast poo poo so they can put a bigger number on the box. Last time I went to a movie before they switched to digital they played the movie at like 48 Hz instead of 72 so it was dim as gently caress and flickering all over.
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Jan 4, 2013 21:29
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pagancow posted:if you give anybody interlaced video to put on the web buy a camera that can shoot progressive jees. I used to have media people give me 1 GB .mov files with 50i DV-codec and some kind of PCM soundtrack for a 5 minute video, it was literally impossible to play back in anything but the mac version of quicktime, we had to use VLC for the projection system we had also it still looked like poo poo despite being nearly uncompressed
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Jan 10, 2013 14:25
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Most TVs scale up and crop the picture 5-10% because TV standards are dumb as gently caress and flat screens had to emulate overscanning like CRTs did naturally since they had lovely HT regulation and it kept the picture from visibly moving around. For some horrible reason they always enable this on digital inputs too, so to compensate PCs letterbox your precious pixels so the TV can blow them up again because it hates you. It was a bad idea in the first place (let's just throw out 10% of our already terrible resolution picture and stretch it all over the place) and there is literally no reason to do it now except dumb people thinking it looks different. These are the same people who want to stretch 4:3 to 16:9 so they can get their money's worth.
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Jan 17, 2013 07:51
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yeah you know how a CRT monitor might make the picture a little larger when you go from all dark to all bright picture? TVs are like that but a million times worse, so instead of regulating the high tension supply they just adjusted them to make the picture bigger than the screen. if you adjust a normal TV to not overscan then it looks like poo poo since the width of the picture will be uneven as the brightness of each line changes, unless you are a huge geometry sperg like me and manually tune the HT regulation adjust
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Jan 17, 2013 08:29
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the best thing about computer video is that unless you're a huge sperg all your video will be displayed at 60 Hz so even when you've hand tweaked the decoder chain to handle the million different formats it'll still be jerky poo poo playing 24/25 fps content most computer grade LCDs only work at 60, 59 and maybe 50 Hz basically get a DLP projector, runs at anything from 50 to 80 Hz
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Feb 28, 2013 15:52
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MPC-HC supports resolution switching, and you can install Reclock if you like audio track switching not working. it speeds up or down playback to match the monitor as best as it can, and then does something to correct the pitch. still better than NTSC judder but not as great as actually having the right refresh rate
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Feb 28, 2013 17:38
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THC posted:my display supports 24hz but my movies looked jerky as gently caress when I tried them in that mode. what gives probably inverse telecine not being applied if it was a DVD with my lovely intel graphics laptop htpc moving from internal monitor to external HDMI makes it play video all jerky until I reboot with it already connected also I literally had to make a custom inf to make custom resolutions over HDMI with Intel's lovely drivers, custom resolutions only work over VGA wtf intel
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Feb 28, 2013 22:15
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Jim Silly-Balls posted:https://www.youtube.com/watch?v=JQokTc8D0P8  who would look at that and say "yup looks good"
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Mar 1, 2013 14:15
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Our OTA is DVB-T, the raw bit rate is like 6-8 Mbps 720p H.264 with AAC audio at 50p. Turns out it looks pretty good when it's not displayed on a POS TV with ~*post processing*~ that seems to consist of saturation to 150%, lovely noise reduction filter that blurs everything to poo poo followed by a sharpening filter to make up for the lovely noise reduction.
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Mar 4, 2013 22:36
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IIRC they said they do internal processing at 720i50 and then deinterlace for output, it looks really good though, literally never seen a macroblock on digital TV. Also works well for recording and watching on a PC with a USB dongle.
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Mar 4, 2013 22:47
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Install Gentoo posted:everything should be at least 60 imo I seriously doubt a normal person can tell the difference between a 50 Hz and a 60 Hz signal on an LCD.
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Mar 4, 2013 23:09
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like I know 50 Hz CRTs are loving poo poo but I have never heard anyone say 50p is not enough for silky smooth video
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Mar 4, 2013 23:15
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30 / 29.97 is a pretty scrubby problem to have in the first place
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Mar 10, 2013 01:34
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like almost every single thing about video and TV is a lovely backwards compatibility hack I'm astounded we even broke compatibility with nipkow discs
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Mar 10, 2013 01:38
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lol @ non-square pixels
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Mar 16, 2013 00:50
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ahmeni posted:film grain owns
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Mar 19, 2013 11:02
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BSGs film grain and style in the first season (super high contrast grainy) used to annoy me enough that I didn't watch the show before I could watch it on Blu-Ray and see something that wasn't just macroblocks where the grain should have been.
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Mar 19, 2013 16:54
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echinopsis posted:yeah that thing at the end was a joke but who knows how amazing poo poo will be in the future? perhaps there will be an algorithm that denoises before compression to achieve mean as gently caress compression but uses a totally differenet way to actually store the noise itself and adds it back at the other end?
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Mar 22, 2013 10:36
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I actually quite liked Pro Logic surround, it's a pretty good way to downmix surround to stereo too.
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Apr 5, 2013 10:24
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flyboi posted:Overlay is such a cool/weird thing. When I was a kid I was always so confused when my screenshots ended up neon green blank screens i liked it when i had video behind the browser and random bits of video would show up in photos where the colour matched
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Apr 14, 2013 09:24
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isn't Dolby Digital/DTS like actually a compressed format put into a PCM container so lovely players can just output it unaltered over S/PDIF?
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Apr 19, 2013 20:00
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problem is low loss low capacitance teflon dielectric double silver shielded multi-strand core RG-214 video cables actually makes sense for SDI since it's basically a RF signal it probably doesn't make a lot of sense but it would improve signal transfer for long runs
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May 2, 2013 20:16
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Yeah, RG-214 is enough except it's not teflon dielectric (silver coated is true though) but RG-214 is mostly used for commercial VHF radio installations, to run uncompressed HD-SDI it would take a hell of a lot of bandwidth and it's a video standard so it's 75 ohms, looks like they use high quality RG6 cabling for that, and the associated properly impedance matched 75 ohm BNCs. They're both heaps better than RG58/59 which is probably what would be installed for old SD video cabling.
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May 2, 2013 22:42
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Miyamotos RGB NES posted:ok so mpeg2 is here to say until 2035 minimum can't have those pirates ripping our blu-rays over component now can we? plus you can put a slightly cheaper video ADC in there
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May 12, 2013 20:21
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I think they added 1080p component to the spec a few years ago but it's probably still considered optional. It's still a pretty good standard since it can do 1080i/p pretty far over normal Cat 5 with a balun that's much cheaper than a HDMI one. They did that in school though and the picture is super soft, looks kind of nice actually.
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May 13, 2013 09:50
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is it just me or did VC-1 have a pretty nice compression artifact structure compared to x264?
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May 30, 2013 21:45
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spankmeister posted:RCA connectors are an abomination unto the lord and if you want the one true 75 ohm connector you use BNC 75 ohm BNCs are another abomination
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Jun 3, 2013 08:00
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pagancow posted:
I'd say SMA has better performance at super high frequencies but lol @ using SMA for a production environment with that screw-type mount N-connector is good but loving huge and also screw mount BNC and bayonette mount connectors in general supremacy
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Jun 3, 2013 18:05
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Nomnom Cookie posted:its probably something really gay and terrible to be backwards compatible with graphics cards from 1991 i think it's like 1 pin for CGA, one for VGA or some arcane bullshit like that, but then they implemented EDID on top of that too probably some serial protocol on one of the pins, I think one is just the detect-pin from the graphics card still though
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Jun 3, 2013 20:48
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spankmeister posted:much like ur posting the real abomination is the european standard TV connector http://en.wikipedia.org/wiki/TV_aerial_plug every single TV in europe uses it, it is loving poo poo by any measure, even the pretty horrible UHF connector is better, it's used for 75 ohms but is literally a 50 ohm connector from the 1920s
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Jun 3, 2013 21:33
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even the F connector - which is pretty terrible in general - is better for decades the standard for F connectors was to just strip some wire and shove it into the plug, then hope the cable doesn't just fall out still better than that piece of poo poo
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Jun 3, 2013 21:39
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Miyamotos RGB NES posted:american tvs had some pretty shameful plugs That's actually a decent way of connecting a dipole/folded dipole (i.e. a wire antenna) since I'm pretty sure that's a balanced input. Makes building antennas really easy, and those plugs are supposed to use that flat ladder line cable which is actually pretty low loss. It's awful for connecting anything like cable tv etc though
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Jun 4, 2013 10:40
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Detroit Q. Spider posted:http://en.wikipedia.org/wiki/File:F_Connector_Side.jpg It's barely even a connector, it's just a crude shell+thread loosely wrapped around a stripped bit of coax, any amount of force will pull it off unless you're a cable janitor with the compression fit versions it's like someone with no RF design ability saw a SMA connector
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Jun 4, 2013 23:00
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about_face posted:how should I mux two audio tracks together, one being a MP3 commentary the other being AC3 passthru? should i just transcode the ac3 to mp3 and then just merge the tracks in audacity or would it be better to leave it as AC3 you're hosed either way, I'd decode to wave, mix then encode to AAC
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Jun 6, 2013 23:27
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lol vorbis seriously? I guess if you're uploading it to wikipedia it's ok
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Jun 6, 2013 23:49
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it just works (like poo poo)
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Jun 10, 2013 17:23
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I like how the eye is much more sensitive to horizontal resolution than vertical resolution. On time I tried watching a tube TV with my head to the side and I spent a few minutes wondering why it suddenly looked like this, then I remembered: oh, kell factor, nevermind.
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Jun 14, 2013 23:39
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http://www.pembers.freeserve.co.uk/World-TV-Standards/Line-Standards.html here's another site with lots of spergy details about old TV standards
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Jul 10, 2013 09:02
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you could do something silly like build a dedicated read-out for each pixel with a phototransistor and record it to tape (one tape track per pixel) and then like a custom LED panel to display it, it would have no frame-rate and you could sample each pixel at maybe a few kHz/16-bit and get perfect reproduction but it would be crazy complicated and there would be no way to display it properly on a computer or edit it with conventional software/hardware and the bandwidth to transfer it would be ridiculous.
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Aug 28, 2013 13:31
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| # ¿ May 21, 2024 23:59 |
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Detroit Q. Spider posted:records are bandlimited to ~17 khz as i understand it because any oscillaton higher than that will throw the stylus from the groove. also stereo records use mid-side coding so they lose a lot of spatial information. they're like analog mp3s!! they used to make quadrophonic LPs that used funky "FM-PM-SSBFM (frequency modulation-phase modulation-single sideband frequency modulation)" encoding extending to 45 kHz analog bw, they used bigger tracks to do it but LP has no problem covering the full ultrasonic audio range. I think they used to wear out a lot quicker though. there's a lower limit at 20 Hz and they use the RIAA equalizer to lower the bass levels before making the vinyl since otherwise the tracks would have to be physically wider
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Nov 9, 2013 20:49
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