Yüksek akım çıkışlı 5V güç kaynağı

Bu da burda dursun bakalım...

Kaynak: https://www.george-smart.co.uk/scrapbook/high_current_5v_regulator/

How can I get high quality/low size MP4s like the LOL release group?

Release group LOL does an excellent job at encoding their releases on The Vampire Diaries (on other shows like How I Met Your Mother the bitrate is higher, so doesn't seem this effective).

About 200 MB each ~45mins MP4 file, amazing quality considering.

I just wonder what settings and what software they use. I've tried to get info from these files using MediaInfo, then use the settings in HandBrake, but I didn't really succeed.

Could anyone please help me? I don't have much knowledge about encoding/compressing.

Answer

The guidelines for encoding (pirated) video are called "scene guides". They are signed by various release groups who will make sure their videos comply to the guide, LOL being one of these groups.

You can find a list of scene guides scenerules.org. The standard you're looking for is—if I'm not mistaken—the SD x264 TV Releasing Standard, assuming that your video is 1280×780. If you have HD video, you're probably not going to get really good quality at 200 MB for 45 minutes. That'd translate to roughly 600 kBit/s and would be enough for 720p though.

As for encoding tools, you can get pretty far with FFmpeg (which Handbrake is based on). The only culprit is that the use of FFmpeg and FAAC audio is banned for that scene guide, but unless you're actually contributing, that won't matter.

If you have no prior experience with video encoding and all of these keywords don't mean anything to you, please have a look at the following blog articles / Super User questions:

• What is a Codec (e.g. DivX?), and how does it differ from a File Format (e.g. MPG)?
• FFmpeg: The ultimate Video and Audio Manipulation Tool

Basically, the rules say you have to use the x264 encoder with a Constant Rate Factor quality setting. What it does is quite different than setting a constant bitrate: you can set the CRF to have x264 encode the video with a constant quality.

Typical CRF levels are between 18 and 28, and the release group recommends 19–20 for high quality encoding of material that is easy to compress. You're not going to know the final file size in advance when doing that, but that's the whole point of doing CRF encoding: You don't care about the actual file size—you just want good quality.

Once you set up ffmpeg, and you have your input video ready, encoding is actually quite simple. Note however that your source video must be of high quality, otherwise re-encoding will only deteriorate its quality much more.

Here are the key parameters:

• x264 video with:
  • CRF 19–20
  • slow profile (better compression efficiency at the expense of encoding time)
  • H.264 level 3.1, which sets a few constraints
  • Downscaling has to be done with any resizer other than bicubic (which is the FFmpeg-default). Lanczos can be used, for example.
  • A tune setting for the source (e.g. film for film-like content)
• AAC audio with:
  • Variable bit rate encoding
  • Bit rate between 96 and 160 kBit/s

In ffmpeg, this translates to the following:

ffmpeg -i input.mp4 \
-c:v libx264 -crf 19 -level 3.1 -preset slow -tune film \
-filter:v scale=-1:720 -sws_flags lanczos \
-c:a libfdk_aac -vbr 5 \
output.mp4

In FFmpeg, your choices for AAC encoding are a bit limited. See here for your AAC choices and also refer to the FFmpeg and AAC Encoding Guide for more information.

If your video ends up being too large, you may adjust the CRF. Values ±6 will result in half/double the bit rate, so if you start with 19 and go to 25, you'd end up with half the bitrate. The scene rules don't allow CRF above 24, but you probably won't mind.

Answer2

Can't speak to the release group you mentioned since you didn't post the mediainfo. But here's a guide to making compact encodes, which means striking a good quality/size balance.

You should start with HandBrake and the best available source. In the Source section, select a short but difficult to encode segment (with both action and fine detail). In the Destination section, select libmkv. In the Video tab, uncheck use advanced options (you can still add those options case by case in more settings), select --rc=crf ratecontrol, the highest --preset your computer can bear (slower or veryslow), a --tune that matches the source (film or animation should cover it), and set the profile and level to auto/auto. Then play with the resolution (only if the source is HD; in picture settings, set anamorphic to loose and vary one of the axes, from the next highres resolution and down) and the --crf until you find a good compromise between quality and bitrate for your short segment. Note that the crf is tied to the rest of your encoding settings, which is why it should be the last video setting you change. In Audio, go with Vorbis at 160kbps (this will use AoTuV -q5, achieving transparency without further tuning). In the other tabs, check that everything you might need is preserved (chapter marks, subtitle tracks, metadata, etc). When you're satisfied, you can use these settings to encode the rest of the episode; the average bitrate should end up much lower than on the difficult segment. When you're confident in your settings, you can use them to encode whole seasons.

How the above steps improve compactness: libmkv gives you access to more codecs, profile and version to auto means there won't be any playback constraints to hold back the encoder. A short segment (a few seconds) gives you a lot more time to tweak things and look at the results. Tune optimises psychovisual (perceived) quality for what the source is supposed to look like. Higher presets improve compactness at the expense of encode time (this may not be noticeable on your difficult segment, but will improve the bitrate in most other scenes). CRF ratecontrol means that your encode will vary the bitrate to target a given quality, with more demanding episodes getting more space.

A denoising filter can also be very useful if you're keeping the original resolution. You'll want to keep it light because the goal isn't to clean up a perceptible source defect, but to improve compressibility without noticeably degrading quality. Here is a guide to using HandBrake's HQDN3D denoiser, which is in between x264's --nr and state of the art denoisers for quality.

Answer3

FFmpeg TV

Based on slhck answer I built this simple Python solution to call the right ffmpeg parameters. Based on the latest scenerules 2016 TV standards.

python3 ffmpeg-tv.py input.mp4 output.mkv

Described you can find all the parameters, and a brief description on why they were set this way by default.

  # 1.3) Providers which downscale 1080i to 720p (e.g. BellTV) are not allowed.
  # 5.10) Resized video must be within 0.5% of the original aspect ratio.
  scale="-1:-1" # <width>:<height>; -1 maintain ratio.

  # 4.1) Video must be H.264/MPEG-4 AVC encoded with x264 8-bit.
  video_encoder="libx264"

  # 4.4) Constant Rate Factor (--crf) must be used.
  # 4.4.1) CRF values below 18 and above 23 are never allowed.
  # http://slhck.info/video/2017/02/24/crf-guide.html
  # (lossless) 0 <- (better) 23 <- (worst) 51
  # ┌─────────────────┬───────┬───────────────────────────────────────────┐
  # │ Compressibility      │  CRF    │ General Examples                                      │
  # ├─────────────────┼───────┼───────────────────────────────────────────┤
  # │ High                 │ 18-19   │ Scripted, Talk Shows, Animation, Stand-Up             │
  # │ Medium               │ 20-21   │ Documentary, Reality, Variety, Poker                  │
  # │ Low                  │ 22-23   │ Sports, Awards, Live Events                           │
  # └─────────────────┴───────┴───────────────────────────────────────────┘
  crf="19"

  # 4.6) Settings cannot go below what is specified by preset (--preset) 'slow'.
  preset="slow"

  # 4.7) Level (--level) must be '4.1'.
  level="4.1"

  # 6.4) Only sharp resizers, such as Spline36Resize, BlackmanResize or LanczosResize/Lanczos4Resize,
  # must be used.
  # 6.4.1) Simple resizers, such as Bicubic, PointResize or Simple, are not allowed. 
  resizer="lanczos"

  # 4.17) Optional tuning (--tune) parameters allowed are: 'film', 'grain' or 'animation'. 
  # https://superuser.com/questions/564402/explanation-of-x264-tune
  # film – intended for high-bitrate/high-quality movie content. Lower deblocking is used here.
  tune="film"

  # 8.1) Audio must be in the original format provided.
  # 8.1.1) Transcoding audio is not allowed.
  # 8.2) Multiple language audio tracks are allowed.
  # Since we cannot ensure that the external content is in an acceptable TV format, we'll recode
  # it into aac. We're just playing safe here.
  # 
  # FFmpeg supports two AAC-LC encoders (aac and libfdk_aac) and one HE-AAC (v1/2) encoder
  # (libfdk_aac). The license of libfdk_aac is not compatible with GPL, so the GPL does not permit
  # distribution of binaries containing incompatible code when GPL-licensed code is also included.
  # libfdk_aac is "non-free", and requires ffmpeg to be compiled manually.
  # Second best encoder is the native FFmpeg AAC encoder. (aac)
  audio_encoder="aac"

  # Audio quality (bit rate).
  # Use either VBR or CBR. VBR is the easiest.
  # https://trac.ffmpeg.org/wiki/Encode/AAC#fdk_vbr
  # VBR: Target a quality, rather than a specific bit rate. 1 is lowest quality and 5 is highest
  # quality.
  # https://trac.ffmpeg.org/wiki/Encode/AAC#fdk_cbr
  # http://wiki.hydrogenaud.io/index.php?title=Fraunhofer_FDK_AAC#Bitrate_Modes
  # CBR: kbps
  vbr="5"
  cbr=None

  # 8.2) Multiple language audio tracks are allowed.
  # 8.2.1) The default audio track must be the language intended for release (e.g. An English release
  # containing English, German and Russian audio tracks, must have the default flag set on the English
  # track).
  # https://trac.ffmpeg.org/wiki/Map
  # Include "all" inputs to the output: -map 0
  map="0"

See ffmpeg-tv.py for the complete source code.

Kayak / Source: https://superuser.com/questions/582198/how-can-i-get-high-quality-low-size-mp4s-like-the-lol-release-group

Meta Bileşeninde Wordpress.org linkini kaldırmak

Aşağıdaki Bilgiler İşe Yarıyor...

...chil(1) işe yaradı bende



Use custom CSS...

.widget_meta > ul > li:nth-last-child(1) {
     display: none;
}

.widget_meta > ul > li:nth-last-child(2) {
     display: none;
}
The answer by Oscar Silván is actually to remove the RSS links. To remove the WordPress link use:

.widget_meta > ul > li:nth-last-child(0) {
     display: none;
}
The numbers work backwards from the end. I have been trying to solve this problem for a couple of days now, and the answers given in the WordPress forum don't work.

Using the plugins suggested to stop the RSS feeds from working, but the links are still displayed. Since WordPress is now being used for static websites and not just blogs it is time they offered this in customization. Anyway it works fine for me now, and I only have the sign-on link for the administrators. I still have "powered by WordPress" at the bottom, but that is fine.

kaynak: https://wordpress.stackexchange.com/questions/38234/remove-wordpress-org-meta-link

Filtering YouTube with Bind9 Using a Response Policy Zone - Response Policy Zone kullanarak Bind ile Youtube'u engellemek

Filtering YouTube with Bind9 Using a Response Policy Zone

September 23, 2015 in Blog, Ed-Tech

In the educational world, YouTube has been considered a ‘bad’ word.  This is a bit troubling considering the wealth of information that is available on YouTube which could be used for educational purposes.  Many school districts are unaware of the tools they have to filter YouTube which may reduce the likelihood of a student stumbling across content that may be objectionable.  One of the best tools currently available is the ability to force filtering of YouTube by using a Response Policy Zone, or RPZ.  By using a RPZ you can force filtering of all devices on your network given they are using your DNS server.  In this article, we’ll focus on the configuration on an existing Bind9 server running on *nix.  The setup is pretty simple and should take about 10 minutes to complete if you are already using Bind as your name server and have a familiarity with *nix.
The first thing we will need to do is to add a response-policy to the global options area.  Some Linux distributions will put the global options in their own file (ie:  /etc/bin/named.conf.options). Your options should look like this…

options {
 // All your existing setting should be here...
 response-policy { zone "rpz"; };
};

Next we need to define the zone for the RPZ, it is typically best to place the zone definition in your *.local file (ie: /etc/bind/named.conf.local)

zone "rpz" IN {
 type master;
 file "/etc/bind/rpdb.zone";
 allow-query {none;};
};

Lastly we need to create and define the /etc/rpdb.zone file.  This file should look something like this…

$ORIGIN rpz.
$TTL 1H
@       IN       SOA       dns1.yourdomain.com. root.yourdomain.com. (
                           7
                           1H
                           15m
                           30d
                           2h )
                           NS LOCALHOST.

www.youtube.com           IN CNAME restrict.youtube.com.
m.youtube.com             IN CNAME restrict.youtube.com.
youtubei.googleapis.com   IN CNAME restrict.youtube.com.
youtube.googleapis.com    IN CNAME restrict.youtube.com.
www.youtube-nocookie.com  IN CNAME restrict.youtube.com.
// These are for safe search and have nothing to do with youtube, but 
// you might be interested in implementing these as well.
google.com                IN CNAME forcesafesearch.google.com.
www.google.com            IN CNAME forcesafesearch.google.com.

A few things to note:

1. You will need to change your SOA addresses, in this case, we used the placeholders of dns1.yourdomain.com. root.yourdomain.com. 
2. Do not add periods after www.youtube.com, m.youtube.com, and youtubei.googleapis.com like you would normally for FQDNs.  You don’t use them in a RPZ file.

After this, restart Bind and let’s test it out!

nslookup www.youtube.com

You should get a non-authoritative answer of restrict.youtube.com
If so, you should be all set, head over to www.youtube.com and type in your favorite naughty search word and you should get a message like…

If your results aren’t filtered, don’t panic, this is where the named-checkconf utility comes to the rescue.

 sudo named-checkconf -z /etc/bind/named.conf

You should not see any errors when running this command, if you do see errors correct them and try again.
YouTube also provides the following page to help troubleshoot any issues you may encounter.
https://www.youtube.com/check_content_restrictions
It should be stated that YouTube filtering isn’t perfect by any means, it involves self-reporting of the content uploaded as well as end-user reporting, so don’t be surprised if something does get through.

Kaynak: https://www.cwssoft.com/?p=1577

VLC player ile bir video dosyasını streaming yayınlarken dikkat edilmesi gereken husus ve ayarlar.

VLC player ile bir video dosyasını streaming yayınlarken dikkat edilmesi gereken husus ve ayarları tecrübelerime binaen şöyle sıralayabilirim. Bu ayarlar herhalde çoğu sistemin oynatabileceği bir stream sağlayacaktır bize...

HTTP şeklinde yayınlayalım,
parametrelerinde isteğe göre 8080 uygundur,
sonraki parametre dosya ismi olacak ona da "/sabit.ts" gibi root dizini olarak değerlendireceği konumda "sabit.ts" isimli dosyayı belirtelim,

Video / audio kodlama ayarlarında yeni bir ayar yaptık "iptv" diye onun da ayarları şöyle;
Kapsülleme için "MPEG-TS",
video codec için "MPEG-2",
audio codec için "MPEG Audio".

Bu şekilde yayınlarsak Next&NextStar minix uydu alıcısının IPTV yazılımında adresi verdiğimizde lokal ağda yayını sesiyle ve görüntüsüyle aldık. Azıcık donmalar olabiliyor fakat bu sanırım uydu alıcısından kaynaklanıyor.

Zyxel P-600 modemi Access Point olarak kullanmak

Arızalı olduğunu bildiğim fakat arızanın neresinde olduğunu anımsamadığım bir modemi wifi büroya wifi AP kazandırmak için ayarlamak istedim. Biraz araştırdım tabii... Bir arkadaşın da yönlendirmesiyle işlem şu şekilde gerçekleşti.

- Modem web arayüzünden wifi ayarlarını yapıyoru (şifre, kanal v.s.)
- DHCP sunucusunu pasif hale getiriyoruz.
- en son olarak modemin WAN ayarlarından çalışma modunu "Bridge" olarak ayarlıyoruz.

Bende çalışıyor gibi göründü ama sıklıkla wifi bağlantısında kopmalar yaşıyorum. Belki modemin arızasından olabilir. Sağlam bir modelle de denersem yazarım.

Virtualbox diskimi 100GBa çıkarmak için yazmam gereken komut

Virtualbox diskimi 100GBa çıkarmak için yazmam gereken komut. Bunun çalışması için anlık görüntüsü olmaması gerekiyor diskin. Buyurun;


C:\Users\nejatumutguner\VirtualBox VMs\7 Kopyası>vboxmanage modifymedium disk "7
 Kopyası-disk1.vdi" --resize 100000