Convert to AV1 format using ab-av1

Kevin4fm

@MrMazda Thanks for the detailed explanation. To be honest, though, I still don't understand if an .mkv is considered a different format to an .mp4.

Assuming they're otherwise the same, but one torrent contains a single .mkv file with soft coded English and French subs, while the other torrent contains three files - 1 x .mp4, 1x .en.srt, and 1x .fr.srt, are they duplicates?

I get that if the .mkv contains four set of subs - English, French, Chinese and Thai - then it isn't, but that it's the responsibility of the uploader to make any differences clear in the description to help mods, but if in the former case they're considered duplicates, I feel this should be made clear in the "rules". I'm sure I'm not alone in simply assuming - until now - that if the file type is different, it's a different format.

MrMazda

@Kevin4fm In this case, it would not be a dupe, as the subs in a way are built into a single file, along with the video. It is only when the files are separate that it becomes a dupe.

john32123666

@Kevin4fm said:

I still don't understand if an .mkv is considered a different format to an .mp4.

MKV Format
MKV, short for Matroska Video, is an open-source container format that was developed with flexibility and extensibility in mind. Unlike proprietary formats, MKV allows developers to freely use it without licensing fees, making it popular in open-source projects and media preservation.

MP4 File Format
MP4, short for MPEG-4 Part 14, is one of the most widely adopted video container formats, developed based on the QuickTime File Format. It is the industry-standard container for video, particularly for web streaming and distribution due to its widespread support across devices, platforms, and browsers.

OVERVIEW :

The Most Common Video Formats

MP4 (MPEG-4): The most popular video format in the world. It is universally supported by almost all devices, web browsers, and social media platforms like YouTube and Facebook.
MOV (QuickTime Movie): Developed by Apple for QuickTime. It is a high-quality format primarily used by video editors working in macOS and iOS environments.
MKV (Matroska): A highly flexible, open-source format ideal for archiving movies and TV shows. It can hold unlimited video, audio, and subtitle tracks in a single file but isn't as universally supported by mobile devices.WebM: Developed by Google, this format is specifically designed for
HTML5 web streaming. It yields excellent quality at small file sizes, making it a favorite for web developers.
AVI (Audio Video Interleave): One of the oldest formats, developed by Microsoft. It can provide high-quality uncompressed video but results in very large file sizes.
WMV (Windows Media Video): Created by Microsoft, this format is highly optimized for the Windows ecosystem. It is generally less compatible with Apple or mobile devices without third-party converters.

Containers vs. Codecs
When discussing video formats, it is also essential to know the difference between a container and a codec:

Container: The file extension (e.g., .mp4, .mov, .mkv) that acts as a wrapper holding your data together.
Codec: The compression/decompression algorithm used to shrink and encode the actual video and audio data inside the container (e.g., H.264, H.265/HEVC, AV1).

So the rules should be :
A file is considered a duplicate if an existing torrent has the different (same) format and similar size (<10% difference) and has at least one seeder.

john32123666

In these case : let's consider
Dell, HP, Lenovo, Apple, ASUS, Alienware, MSI are all they same SMH

(Even if different type of company, manufacturer, distributor, retailer, product, vendor and brands etc... ) ...

Kevin4fm

@john32123666 OK. These are technical differences, and very well explained. Thank you. But I'm specifically talking about / asking about how they're considered here. In your explanation, you state

The Most Common Video Formats...
MP4 (MPEG-4): The most popular video format in the world. I...
MOV (QuickTime Movie): Developed by Apple fo...
MKV (Matroska): A highly flexible, open-source format....

So a surface read of this says that .mkv files ARE a different format to .mp4, as are .avi, .wmv, .mov, etc.

Yet my experience is that they're treated here as being the same as .mp4, unlike the other formats. A 1080p .mkv video file with hard coded English subs will be considered a duplicate of a similarly sized 1080p .mp4 file that also has hard coded English subs. This doesn't seem to be the case with other formats, such as .wmv or .avi.

Perhaps different people have different understanding of what is meant by "format", which I've assumed to be file type, as opposed to 1080p/720p/480p, which I understand as "resolution".

What it comes down to is whether a .mkv file that's identical in every other way to a .mp4 file is a duplicate. And, if it is, why doesn't the same hold true for .avi, .wmv, etc.? Or does it, and I've not yet come across an example of it? In which case, the guide note for duplicates should read "resolution", not "format", or have an explanatory qualifier "...format (i.e. 1080p, 720p, etc.)".

john32123666

@Kevin4fm IDK I think they evaluate different format with resolution type not on format container ...

john32123666

Topic is wrong : Convert to AV1 format using ab-av1
shoulde be codec ...

AV1 is a codec, not a file format. It stands for AOMedia Video 1 and is a highly efficient, royalty-free video compression algorithm developed by the Alliance for Open Media to stream high-quality video over the internet.

Kevin4fm

IDK I think they evaluate different format with resolution type not on format container ...

@john32123666 Nope, not in my experience. And that's my point. Clear advice / guidelines are needed, not ambiguity or the possibility of different interpretations depending on who is making the decision.

john32123666

@Kevin4fm that's kind of stubborn answer ...
They are MOD and staff and we are only users ...
So the they have the rights to evaluate things ...

john32123666

@Kevin4fm so @ work you listen to your co-workers instead of your supervisors and if they tell you to jump you will also jump ...

Kevin4fm

@john32123666 I'm not sure I get you point but, sticking with your analogy, I'm asking that the supervisors / decision makers give clearer, more explicit guidelines.

john32123666

@Kevin4fm so you're not sure ,,, SEE

john32123666

These is getting way too far Kevin, all yours ...

ianfontinell

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john32123666

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john32123666

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Kevin4fm

@ianfontinell said:

get the hell out of here with that stupid ass off-topic discussion please

Given that the very first sentence that started this thread was "what are these? its a reupload of same file but little smaller. whats the point of this? [Convert to AV1 format using ab-av1]", I don't believe a discussion of what is, and is not, considered a duplicate and why that is, is "off-topic".

raphjd

Back on topic, please.

john32123666

About the subject relating to conversion and re-en/coding ...

There is no rules against re-encoding video/clips into other file format container, large or small size ...
however other file formats (avi, wmv, mpeg, mp4, etc) which were converted into DVD Video. are forbidden ...

Kevin4fm

@john32123666

"2. DUPLICATE files are not allowed and will be removed. You are expected to run a search for duplicates prior to submitting a torrent. Duplicates may be accepted when part of a themed collection.A file is considered a duplicate if an existing torrent has the same format and similar size (<10% difference) and has at least one seeder."

Still doesn't answer the question of whether .mkv are considered the same format as .mp4. I've had torrents deleted because they are. Yet other file types - "formats" - seem unaffected. Which seems inconsistent.

I'm mainly seeking clarity so that I can correctly follow the rules and, believe that it should be stated in "The Rules", to which people look for guidance, and not buried somewhere in a topic thread or two.