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Re: H.263

Cross-posted to 2 groups.

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On Fri, 3 Apr 2026 23:05:23 -0000 (UTC), Lawrence D’Oliveiro wrote:
> On Fri, 3 Apr 2026 18:49:43 +0200, Siard wrote:
> 
> > Video codec H.263, like H.265, is not supported by browsers, so only
> > audio can be played. Here is such a video:
> >
> >   https://www.tanchazheerenveen.nl/media/test_h263.mp4
> 
> I can do
> 
>     ffplay https://www.tanchazheerenveen.nl/media/test_h263.mp4
> 
> and that plays, but shows the video as too narrow.

Yes, H.263 videos can be played with media players.
But browsers do not support it.

> > resulting in this video:
> >
> >   https://www.tanchazheerenveen.nl/media/test4.mp4
> >
> > The video is now displayed correctly in Firefox! However! In Chrome
> > and Chrome-based browsers it's still too narrow. Is there perhaps
> > something I can do to correct this?
> 
> I notice that ffplay displays this among the playback messages:
> 
>     SAR 48:35 DAR 16:9
> 
> There is a “setsar” filter you could use with ffmpeg to try changing
> the SAR to 1:1, and see if that helps.

I have been experimenting a lot with setsar and setdar, but in
Chrome(-based) browsers the video remained narrow.
However, I finally found something else, namely, change the resolution:

    ffmpeg -i test4.mp4 -filter:v scale=1920:1080 -c:a copy test5.mp4

And at last, Chrome browsers also show the video correctly.
Anyway, thank you for putting me on the right track!

As you may have noticed, the site I manage belongs to a local folk
dance group. The video shows the rehearsal of a Norwegian folk dance,
Ut på Vegum.
Members need to log in to access it. I would like to show the whole
end result, but I guess they don't like the idea that it is publicly
available.
So let me show just the first 10 seconds of the end result:

    https://www.tanchazheerenveen.nl/media/test5.mp4

Thanks again!

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Re: H.263 Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-04-03 23:05 +0000
  Re: H.263 Siard <saylor259@mailbox.org> - 2026-04-04 14:22 +0200

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