From: Timo Rothenpieler via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Cc: Timo Rothenpieler <timo@rothenpieler.org>
Subject: [FFmpeg-devel] Re: NVENC shows significantly worse compression efficiency than libx264 for MPEG-2 (MPG) + YADIF
Date: Sun, 28 Dec 2025 22:00:03 +0100
Message-ID: <0b26f614-8e2f-4ad3-90ea-afd5c430c4d7@rothenpieler.org> (raw)
In-Reply-To: <CALaz=bpufZNmPmRiB+pxEA-4c8XijENUPXhPL1vCiyfauTwLrA@mail.gmail.com>
[-- Attachment #1.1.1.1: Type: text/plain, Size: 407 bytes --]
I'm not exactly sure I follow.
For one, nvenc CQ values do not in any way relate to x264 crf values.
You need to figure out each individual numbers that works for you.
Also, the input codec and used filters have little to not impact on the
output.
Hardware encoders are worse than software ones at the same bitrate,
quality wise. That's not a bug, but just how things work and are.
Timo
[-- Attachment #1.1.1.2: OpenPGP public key --]
[-- Type: application/pgp-keys, Size: 3203 bytes --]
[-- Attachment #1.2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 840 bytes --]
[-- Attachment #2: Type: text/plain, Size: 163 bytes --]
_______________________________________________
ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org
To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org
prev parent reply other threads:[~2025-12-28 21:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-28 19:20 [FFmpeg-devel] " Sheikh Afnan via ffmpeg-devel
2025-12-28 21:00 ` Timo Rothenpieler via ffmpeg-devel [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=0b26f614-8e2f-4ad3-90ea-afd5c430c4d7@rothenpieler.org \
--to=ffmpeg-devel@ffmpeg.org \
--cc=timo@rothenpieler.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Git Inbox Mirror of the ffmpeg-devel mailing list - see https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
This inbox may be cloned and mirrored by anyone:
git clone --mirror https://master.gitmailbox.com/ffmpegdev/0 ffmpegdev/git/0.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 ffmpegdev ffmpegdev/ https://master.gitmailbox.com/ffmpegdev \
ffmpegdev@gitmailbox.com
public-inbox-index ffmpegdev
Example config snippet for mirrors.
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git