From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id DA58C158020 for ; Sun, 11 Dec 2022 04:45:37 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 48683E08FB; Sun, 11 Dec 2022 04:45:33 +0000 (UTC) Received: from mail-lf1-x129.google.com (mail-lf1-x129.google.com [IPv6:2a00:1450:4864:20::129]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 0DCB3E08E0 for ; Sun, 11 Dec 2022 04:45:32 +0000 (UTC) Received: by mail-lf1-x129.google.com with SMTP id c1so13265398lfi.7 for ; Sat, 10 Dec 2022 20:45:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :from:to:cc:subject:date:message-id:reply-to; bh=k/4B7aNLOfcg5+th/6mFyLexJ8e8FmLP+SJqKfQfKc8=; b=aLa4k8in0vfSjRgFP5HjIBZVDTChIKPVjmvMdCPbZEz8alRc9r7IzVSCT9TkZTcfJ6 pZubO5GMSYNtBEJlvLdvY2orU4KDjCrBHNOdoKNXbG7/SFyqH89X3fn7XzmBzu+3xsF4 IijUrJdQxG5rpzR/jWKy2ZURX2Nlpqk1tmchU88m1gsBhfE8eLKWEaYXUZf/687w7xtV cOJ8xM5p5ZGmckY3OZp/F7oNcTke+ksmCdFkUzHo5Lz4Kylqf28ejPzRrCwWo2RF2wGO 5S6ALmbKgKarVJy8H4eA8LK9FcWLq37kOm4Fkz/wbyxiksijU1khLtRKLvSBkXZBFGTO 3JKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=k/4B7aNLOfcg5+th/6mFyLexJ8e8FmLP+SJqKfQfKc8=; b=CM5x+2wBDScDKbJ82neSvX2IBC/MhkWiKCCQhu4H1+617VKS4IuUzNbHVcgliUWGiR unTyqJrdDvNA4OpS1GVwy1wngey1KQ+ly6chIxKpFoHN/hKRJ0k6cNeYTgZC76LRha53 AEyv9LEYSsnIXIuQ6DDWJllAOVHkKwbcKSGoT9tLPXQu6eLDh9CYhdrEJZnfGdjaFZ92 1ZkiI1nmrYMOgpPZgx+UibN4ykfzLBmYG2cyd8FuZCXa8AsdLXsemwGqVHuW6oX26u70 q6LuObfx0PKjNM4pkBtQuPtpd0qpGfC9PeIYAhDnxS0cVAp9N4ayUX9gYPN4ZnS5HDjx eFlw== X-Gm-Message-State: ANoB5plQuEIv6gDOFO2ge9SPzgypoxRB3b2B7urz1UEdVz/Mt6c+k5/J AbJpHJiDUnRNh/Zit/RgKThD9PBuXHRU3udRFK99HNDbmXI= X-Google-Smtp-Source: AA0mqf5lbwfHdlVSAkYfJjnBDA8YGhfR1b5KSHA4JPv8oGnHmD5icc3hJ7N+Fad/zwoYWIR0NHfM/iA+ArMahugXh/k= X-Received: by 2002:a05:6512:2820:b0:4b5:88f0:72d1 with SMTP id cf32-20020a056512282000b004b588f072d1mr3767918lfb.446.1670733931399; Sat, 10 Dec 2022 20:45:31 -0800 (PST) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply MIME-Version: 1.0 References: <9407e524-2226-6ba9-dd7f-bac635d083e3@gmail.com> <2398014.jE0xQCEvom@lenovo.localdomain> <73aa65e5-5384-be5c-d545-91dfc4d73095@youngman.org.uk> In-Reply-To: From: David Rosenbaum Date: Sat, 10 Dec 2022 23:45:20 -0500 Message-ID: Subject: Re: [gentoo-user] NAS and replacing with larger drives To: gentoo-user@lists.gentoo.org Content-Type: multipart/alternative; boundary="0000000000007eccfc05ef860e5f" X-Archives-Salt: d55069a9-d635-4793-8898-82a595e33b77 X-Archives-Hash: 9667faabce653c60eac36a5a367e5f48 --0000000000007eccfc05ef860e5f Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks Dave On Sat, Dec 10, 2022, 11:19 AM Frank Steinmetzger wrote: > Am Sat, Dec 10, 2022 at 09:20:17AM +0000 schrieb Wols Lists: > > > > > Depending on the PVR make/model I've seen 1080p resolution > recordings with > > > > .m2ts and .ts file extensions, while the codecs inside them are the > same. > -------------------------------------^^^^^^^^^^^^^^^^^^^^^^^ > > > > > I wasn=E2=80=99t aware that ts could contain h264. But then again=E2= =80=94I never > really > ---------------------------------^^^^^^^ > > > bothered with live TV recordings in recent years. > > > I think this is confusing CONTAINER and CODEC. > > Where do we confuse those two? We specifically talked of codecs and > =E2=80=9Ccontain=E2=80=9D. > > > .ts is a container format, h264 is a codec. I don't understand it mysel= f, > > either but think of ts as your directory structure and h264 as your fil= e > > structure. > > Now you are confusing me. You say you don=E2=80=99t understand it, but th= en explain > it. TS is like AVI and MKV: a file structure for the payload data. And > payload data can be all kinds of stuff, from ASS plaintext subtitles, ove= r > opus audio to mpeg2 or h264 video. > > > Incidentally, sticking this stuff in a .tar is probably okay - that's > just > > another container, but sticking it in a .tar.gz is not, the gz is your > codec > > and will make the file BIGGER in all probability. > > Tar does not compress, it simply puts all inputs in a 1:1 stream. It does > add some metadata (filename and so on). Packers reduce data volume by > increasing information-per-byte. So if the total information stays the sa= me > (for lossless coding), the number of bytes decreases. Encoded video data > ideally has even entropy. It is indistinguishable from random noise. That= =E2=80=99s > why compressing it again does not yield anything, or even adds some volum= e > again. > > -- > Gr=C3=BC=C3=9Fe | Greetings | Salut | Qapla=E2=80=99 > Please do not share anything from, with or about me on any social network= . > > =E2=80=9CMankind must put an end to war or war will put an end to mankind= .=E2=80=9D > =E2=80=93 John F. Kennedy > --0000000000007eccfc05ef860e5f Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thanks

Dav= e

On Sat, Dec 10, 2022, 11:19 AM Frank Steinmetzger <Warp_7@gmx.de> wrote:
Am Sat, Dec 10, 2022 at 09:20:17AM +0000 schrieb Wols Lists:<= br>
> > > Depending on the PVR make/model I've seen 1080p resoluti= on recordings with
> > > .m2ts and .ts file extensions, while the codecs inside them = are the same.
-------------------------------------^^^^^^^^^^^^^^^^^^^^^^^
>
> > I wasn=E2=80=99t aware that ts could contain h264. But then again= =E2=80=94I never really
---------------------------------^^^^^^^
> > bothered with live TV recordings in recent years.

> I think this is confusing CONTAINER and CODEC.

Where do we confuse those two? We specifically talked of codecs and
=E2=80=9Ccontain=E2=80=9D.

> .ts is a container format, h264 is a codec. I don't understand it = myself,
> either but think of ts as your directory structure and h264 as your fi= le
> structure.

Now you are confusing me. You say you don=E2=80=99t understand it, but then= explain
it. TS is like AVI and MKV: a file structure for the payload data. And
payload data can be all kinds of stuff, from ASS plaintext subtitles, over<= br> opus audio to mpeg2 or h264 video.

> Incidentally, sticking this stuff in a .tar is probably okay - that= 9;s just
> another container, but sticking it in a .tar.gz is not, the gz is your= codec
> and will make the file BIGGER in all probability.

Tar does not compress, it simply puts all inputs in a 1:1 stream. It does add some metadata (filename and so on). Packers reduce data volume by
increasing information-per-byte. So if the total information stays the same=
(for lossless coding), the number of bytes decreases. Encoded video data ideally has even entropy. It is indistinguishable from random noise. That= =E2=80=99s
why compressing it again does not yield anything, or even adds some volume<= br> again.

--
Gr=C3=BC=C3=9Fe | Greetings | Salut | Qapla=E2=80=99
Please do not share anything from, with or about me on any social network.<= br>
=E2=80=9CMankind must put an end to war or war will put an end to mankind.= =E2=80=9D
=C2=A0=E2=80=93 John F. Kennedy
--0000000000007eccfc05ef860e5f--