Is it “bad”? I always try to download the biggest possible files to get the best possible quality on my 4K TV, focusing on highest bitrate in particular. I wasn’t prepared for these “lines” :D
It isn’t necessarily bad, it’s just an old way to handle low bandwidth. It sucks when video editing, but aside from when we see them when pausing (like your images), it’s very rare we actually notice (from personal experience, at least).
Ahh to be young(er), lots of old TV and media was in ntsc and pal format for broadcast, so it’s interlaced cause bandwidth and storage media cost (you only need to refresh half the crt each pass). There used to be so many threads on doom 9 on the best pipeline for virtualdub(mod) to deintelace and make progressive encodes to divx etc
Actually, interlaced video in NTSC signal was because the NTSC signal was what we used on old school televisions. An old school televisions used an interlaced scan to display the images. Displayed half the image in one scan and then another display the other one and it displayed both of them so fast it appeared to be one image. That’s why TV screens flicker.
Not exactly. It’s true that interlaced signals are good at low bandwidth, but the televisions themselves had an interlaced scan picture, so that’s the main reason why NTSC is broadcast interlaced. For the televisions themselves. When we moved away from analog video to digital video, even television signals in the United States began to transition to a progressive scan, especially when we moved to HD and HDTVs
It can be noticeable during regular playback on a modern display, under the right conditions. Anime is one of those due to the high contrast in the picture.
It was also weird to pause an interlaced video on VHS and watch it alternate between frames. Any objects in motion would jump back and forth.
Most video playing apps have an option for this, I know VLC does.
It was a way of setting up video to save size while not sacrificing visual quality on old CRT TVs. Got left behind as it looks like this on more modern TVs.
So there are some exceptions to size being quality, and you’ve found the most obvious one. .ISO files are full copies of discs, including blank space or filler garbage data. So a DVD might only have a 1GB game on it, but the disc is 4GB, so the ISO is 4GB. Video discs are usually filled more “fully”, but then there are also limitations with how the video can be encoded for DVD that tends to make the video files larger than they would be using more modern formats.
All that to say, if you aren’t interested in the special features on a DVD, or the experience of switching virtuap discs, you’re probably better off looking for the video files outside of an ISO file, if the ISO is of a DVD.
Blu-ray ISOs are closer to space effective, but it’s still most effective to get just the video files.
Woa! Thanks for sharing this! Didn’t know that DVD and Blu-ray have efficiency problems. When I don’t grab .ISO images, I usually go for Blu-ray remuxes with the highest bitrate I can find. Am I right to assume that higher bitrates helps with banding? I hate banding… XD sorry for sounding childish. It’s my day off. :)
Haha! Welcome to the world of interlaced video my friend.
LOL record quick reply :D
I’ll look it up. Thanks! :)
Is it “bad”? I always try to download the biggest possible files to get the best possible quality on my 4K TV, focusing on highest bitrate in particular. I wasn’t prepared for these “lines” :D
It isn’t necessarily bad, it’s just an old way to handle low bandwidth. It sucks when video editing, but aside from when we see them when pausing (like your images), it’s very rare we actually notice (from personal experience, at least).
Ah, I see. I just read the Wikipedia entry on interlaced video and learned that it’s called “combing”.
I was actually just continuously taking a lot of images until the combing was visible. Didn’t pause. ^^
Hail
mpv. It does an AMAZING job at deinterlacing, as an other commenter just taught me. No more combing. :)Ahh to be young(er), lots of old TV and media was in ntsc and pal format for broadcast, so it’s interlaced cause bandwidth and storage media cost (you only need to refresh half the crt each pass). There used to be so many threads on doom 9 on the best pipeline for virtualdub(mod) to deintelace and make progressive encodes to divx etc
Actually, interlaced video in NTSC signal was because the NTSC signal was what we used on old school televisions. An old school televisions used an interlaced scan to display the images. Displayed half the image in one scan and then another display the other one and it displayed both of them so fast it appeared to be one image. That’s why TV screens flicker.
We are saying the same thing aren’t we?
Not exactly. It’s true that interlaced signals are good at low bandwidth, but the televisions themselves had an interlaced scan picture, so that’s the main reason why NTSC is broadcast interlaced. For the televisions themselves. When we moved away from analog video to digital video, even television signals in the United States began to transition to a progressive scan, especially when we moved to HD and HDTVs
It can be noticeable during regular playback on a modern display, under the right conditions. Anime is one of those due to the high contrast in the picture.
It was also weird to pause an interlaced video on VHS and watch it alternate between frames. Any objects in motion would jump back and forth.
Most video playing apps have an option for this, I know VLC does.
It was a way of setting up video to save size while not sacrificing visual quality on old CRT TVs. Got left behind as it looks like this on more modern TVs.
So there are some exceptions to size being quality, and you’ve found the most obvious one. .ISO files are full copies of discs, including blank space or filler garbage data. So a DVD might only have a 1GB game on it, but the disc is 4GB, so the ISO is 4GB. Video discs are usually filled more “fully”, but then there are also limitations with how the video can be encoded for DVD that tends to make the video files larger than they would be using more modern formats.
All that to say, if you aren’t interested in the special features on a DVD, or the experience of switching virtuap discs, you’re probably better off looking for the video files outside of an ISO file, if the ISO is of a DVD.
Blu-ray ISOs are closer to space effective, but it’s still most effective to get just the video files.
Woa! Thanks for sharing this! Didn’t know that DVD and Blu-ray have efficiency problems. When I don’t grab .ISO images, I usually go for Blu-ray remuxes with the highest bitrate I can find. Am I right to assume that higher bitrates helps with banding? I hate banding… XD sorry for sounding childish. It’s my day off. :)