Re: Resizing mp4

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From	Eli the Bearded <*@eli.users.panix.com>
Newsgroups	comp.os.linux.misc
Subject	Re: Resizing mp4
Date	Sun, 20 Jul 2025 16:48:01 -0000 (UTC)
Organization	Some absurd concept
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In comp.os.linux.misc, db  <dieterhansbritz@gmail.com> wrote:
> Occasionally I have video files in mp4 format. I tried the online
> service xconvert but this only reduced the resolution so that I get
> the same size on the creen but fuzzy.
> 
> Is there a way to make the equivalent of a thumbnail video? Xconvert
> does not seem to be it.

I use ffmpeg for video scaling. I wrote a blog entry on it, mostly to
collect my own thoughts for future refence:

https://qaz.wtf/qz/blosxom/2025/01/06/on-ffmpeg

Since then I've added an "adjust compression" line to some of my
scaling jobs:

    -c:v libx264 -b:v 2M -c:a aac -b:a 192k 

It goes somewhere after the `-map 0` option and is incompatible
with the `-acodec copy` option. For thumbnail purposes, I suspect
you might want smaller numbers than "2M" video rate and "192k" audio.

Elijah
------
needed a few years to become comfortable with ffmpeg command line

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Resizing mp4 db <dieterhansbritz@gmail.com> - 2025-07-20 13:40 +0000
  Re: Resizing mp4 Mike Scott <usenet.16@scottsonline.org.uk.invalid> - 2025-07-20 15:37 +0100
    Re: Resizing mp4 Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-07-20 11:52 -0400
  Re: Resizing mp4 Eli the Bearded <*@eli.users.panix.com> - 2025-07-20 16:48 +0000
    Re: Resizing mp4 Lawrence D'Oliveiro <ldo@nz.invalid> - 2025-07-21 05:48 +0000
    Re: Resizing mp4 c186282 <c186282@nnada.net> - 2025-07-25 04:00 -0400
  Re: Resizing mp4 not@telling.you.invalid (Computer Nerd Kev) - 2025-07-21 08:41 +1000
  Re: Resizing mp4 c186282 <c186282@nnada.net> - 2025-07-25 00:02 -0400

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