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Help using Handbrake to compress blu ray files?
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By +TRS-80 · Posted
Friday Windows 11 preview builds are here. Insiders in the Experimental (formerly Dev) and Beta Channel can download builds 26300.8697 and 26220.8690. My Windows11 device on the Preview Channel just got 26220.8728. My guess is this build is a nightly update from 26220.8690. -
By hellowalkman · Posted
Traffic has a surprisingly unexpected impact on your surroundings by Sayan Sen Image by Radik 2707 via Pexels A collaborative study by researchers from several Israeli institutions found that everyday pollution from traffic and industrial activity measurably changed the atmospheric electric field over the Tel Aviv metropolitan area, providing new evidence of how human activity can influence the lower atmosphere. The research was led by Dr. Roy Yaniv of the Hebrew University of Jerusalem and the Gertner Institute at Sheba Medical Center, Dr. Assaf Hochman of the Fredy & Nadine Herrmann Institute of Earth Sciences at the Hebrew University, and Prof. Yoav Yair of Reichman University. The study also involved Itay Froomer, a student from Hadera High School and the Israeli Museum of Medicine and Science (Technoda), who carried out the work as part of the Ministry of Education's 5-unit physics research track. The researchers focused on the atmospheric electric field under fair-weather conditions. Even in the absence of storms, a weak electric field naturally exists between Earth's surface and the atmosphere. One of the main ways scientists measure this field is through the Potential Gradient (PG), which is the inverse of the vertical component of the electric field. PG is a key part of the global electric circuit, a planet-wide system of electrical currents maintained by thunderstorms and electrified clouds around the world. Scientists have long known that the atmospheric electric field can be influenced by factors ranging from large-scale atmospheric processes to local weather conditions such as dust, fog and clouds. Human-made pollution is also known to play a role, but understanding exactly how urban emissions affect the electric field close to the ground has remained an area of ongoing research. To investigate this relationship, the team analyzed measurements from a newly installed electric field mill, an instrument used to continuously monitor the strength of the atmospheric electric field. The instrument was installed at the Center for Technological Education (Roter House) in Holon and became operational in August 2024. It was funded by Israel's Ministry of Education and the Holon municipality. The electric field mill forms part of a broader monitoring network that includes nearby meteorological stations and air-quality monitoring sites. This allowed researchers to compare electric field measurements with detailed weather data and pollution records to better understand what was driving changes in the Potential Gradient. The study focused on two major urban pollutants: fine particulate matter (PM2.5) and nitrogen oxides (NOx), both commonly produced by vehicle traffic and industrial activity. PM2.5 refers to microscopic airborne particles small enough to remain suspended in the atmosphere for extended periods, while NOx is a group of gases released during fuel combustion. Researchers examined daily, weekly and seasonal patterns in the atmospheric electric field and compared them with changes in pollutant concentrations. Their analysis revealed a clear relationship between NOx levels and changes in the Potential Gradient, particularly during morning and evening rush hours when traffic emissions were at their highest. “What we observe is a direct physical link between emission peaks and electrical variability,” explained Dr. Roy Yaniv. “NOx reduces atmospheric conductivity very quickly, so the electric field responds almost instantaneously during traffic rush hours.” Atmospheric conductivity describes how easily electrical charges move through the air. According to the researchers, nitrogen oxides rapidly alter this conductivity, causing a near-immediate response in the electric field. PM2.5, however, was associated with a delayed response. The researchers attributed this difference to the particles' longer atmospheric residence time, meaning they remain in the atmosphere for longer periods, as well as their different microphysical interactions with surrounding air and atmospheric components. The study also identified a pronounced "weekend effect." In Israel, traffic volumes and some industrial activity decline significantly on Fridays and Saturdays. During these periods, concentrations of both NOx and PM2.5 dropped, and corresponding changes were observed in the atmospheric electric field. “The weekend signal demonstrates just how sensitive the electric field is to changes in human activity,” the researchers noted. “When emissions decline, the electrical environment adjusts at once, providing a high-resolution indicator of urban atmospheric conditions.” The findings showed that pollution levels can influence not only the chemical composition of the atmosphere but also its electrical properties. Researchers said the results strengthened the case for using atmospheric electricity as an additional tool for environmental monitoring, particularly in densely populated urban areas where anthropogenic, or human-caused, influences are most pronounced. The study also pointed to potential public health applications. By combining air-quality measurements with observations of atmospheric electricity, researchers said they could gain a more complete picture of how urban atmospheric conditions change over time. “Integrating air-quality data with electric-field measurements gives us a clearer picture of how the lower atmosphere evolves moment by moment,” the researchers added. “It’s a framework that can support both scientific insight and practical environmental decision-making.” Beyond the scientific findings, the project highlighted a collaboration between universities, public institutions and secondary education. Researchers said the work demonstrated how students could take part in real-world environmental research while contributing to studies of air quality, atmospheric processes and their potential effects on society. Source: Hebrew University, ScienceDirect This article was generated with some help from AI and reviewed by an editor. Under Section 107 of the Copyright Act 1976, this material is used for the purpose of news reporting. Fair use is a use permitted by copyright statute that might otherwise be infringing -
By +TRS-80 · Posted
We aren't even at the all-star game and Microsoft is talking about an update that will most likely be released during the World Series if not after. A lot can happen in the world between now and the 2026 World Series, including the 2026 FIFA Cup. Tell me about it again after the FIFA Cup is concluded. That should allow plenty of time to prepare for it. -
By Jdoe25 · Posted
Great, tell me when I have a "Bad Pool Caller" elsewhere not in Windoze. -
By +TRS-80 · Posted
The first improvement they need to make to audio in W11 is to add an equalizer that actually works.
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Technique
So i've damn near filled my 6TB hard drive and i've still plenty more to do ... that means some videos are going to need compressing (all these files are blu-ray MakeMKV rips).
My computer isn't the fastest at doing this which isn't a major issue because i can just set it up to do the job through the night.
To help advise as best as you can you'll probably need to know what i want to achieve and what i'm going to do with the file. If i miss anything out then just ask...
MY GOAL:
* I want to compress the file down from the original 20GB-40GB that it is. Not to a specific size but smaller without any noticeable loss in image & sound quality.
* I want subtitles to remain in the video file - finally figured out how to do this after some trial & error
* AUDIO - the audio currently comes through my TV speakers. It may well forever stay like that, i don't know. I've been looking in to soundbars for a while now and i hope to get one (but have other issues there - off topic) but it's no certainty. I may well move house in the future and have a 5.1 or a 7.1 setup. The latter two (5.1 & 7.1) are very unlikely but not impossible. The soundbar option is the one that there's actually a good chance of ........ my point is .......... i want to future proof the compressed file so that if i ever do get a soundbar (or indeed 5.1/7.1 setup) I can relax in the knowledge that my movie files can make the most of it rather than being like - damn i wish i'd converted those 300 video files that took me months a little differently.
Problem is ... i don't really understand the audio settings on the audio tab in Handbrake.
* The video files are stored on a specific hard drive on my PC and they are played on my TV in my living room via Plex.
So 3 key things really...
* Image quality - but i think my settings are suitable for my goal? So i'm not particularly worried here. Would just like someone to check.
* Audio quality & future proofing - i honestly don't have a clue.
* Image dimensions (we'll get on to that in a sec)
SUMMARY:
Fairly confident i'm right here. I've selected HQ on the right as a best of both worlds kind of thing - good quality without taking forever and creating a bigger file.
I note the size says 1920x800. More on that on the next screenshot.
DIMENSIONS:
I see the source as 1920x1080 yet the entered numbers by default are less. What is correct here? 1920x1080 or 1920x800?
In this example i actually changed the 800 to 1080 simply based on the reasoning i've heard of 1920x1080 but not 1920x800, that's all.
FILTERS:
I left these as default as i don't really know what they do.
VIDEO:
Now i actually left this as default when i converted my file in this example, however where the red arrow is, i've since read that i should change from Peak Framerate to Constant Framerate.
Correct? Or leave as Peak?
AUDIO:
Here's the problem where i've no clue. I don't really know what to select to achieve my goals. I don't know what codec, what bitrate, what mixdown.
I did a little reading but still don't really understand it. Based on this i changed the mixdown for one of the defaults to 5.1 channels.
Most my movies are English but some are in foreign language (Chinese martial arts movies). So not really sure what to select. I used this as an example since most are total English.
The reason there'll be so many options in that dropdown is because when ripping from MakeMKV i don't know which audio/subs to select as there's often many 'English' options. Based on this i just select them ALL. As a result as you'll know - i sometimes end up with that pointless audio of like the director talking over the movie.
SUBTITLES:
Confident i've got this down now...
So with those options i just mentioned to you (such as changing the image dimensions & not really understanding it) i ended up with this...
ORIGINAL MAKEMKV RIP:
CONVERTED HANDBRAKE FILE with altered 1920x1080 (instead of the default 1920x800):
As you can see, it is a wider file than the original. Leave as 1920x800?
I also noticed though that the audio files are different:
ORIGINAL MAKEMKV RIP:
CONVERTED HANDBRAKE FILE:
Sorry for the long post but wanted to give as much info as possible so that we don't have to play tennis before you're able to advise.
Oh and a final one before i finish. Nothing major but while i'm asking the others i just wondered about this one - on my PC many of the video files have like 'poster thumbnails' for the movie, yet the converted by Handbrake files do not.
Is there a way of changing this so that the converted files have the same thumbnail? If so, how? Like i said, nothing major, just me being picky.
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