[FFmpeg-devel] nuv1 in avi

[Michael Niedermayer]

On Wed, Oct 16, 2024 at 12:39:14AM +0300, Andrew Randrianasulu wrote:
> вс, 13 окт. 2024 г., 14:40 Anton Khirnov <anton at khirnov.net>:
> 
> > Quoting Andrew Randrianasulu (2024-10-08 14:03:13)
> > > I was experimenting with mencoder
> > >
> > > ....
> > >
> > > what do you think? ;)
> >
> > why oh oh god why?
> >
> 
> Because mplayer (and mencoder) was first program I successfully compiled
> many, many years back and I used mencoder on underpowered ~400 Mhz Celeron
> for capturing some video
> 
> https://randrianasulu.livejournal.com/13569.html
> 
> now it may considered obsolete, but underpowered hardware still exist. For
> example, PinePhone I was reading about have some 4*1.1 GHz ARM, so ffmpeg
> was used there via cli anyway, surprisingly no-one showed mpeg2 line? It
> was mjpeg or vp8 (9) or x264 ultrafast ....
> 
> https://www.reddit.com/r/PINE64official/comments/18awye8/pinephone_video_recording/
> 
> now, x86 and ARM surely different, but if something can be scaled back to
> non-MMX Pentium it probably will work on many "obsolete" devices where
> latest SIMD sets not available. I actually used some version of Indeo codec
> back in ~2001 for recording in ... 176*144 ? on exactly Pentium 1 150Mhz.
> Under win 9x, from VirtualDub. I was surprised it worked at all (with
> preview!).
> 
> So, I set my AMD FX to 1400 Mhz, fired up mplayer/mencoder under qemu-i386
> to see how it performs with some binary mjpeg encoder (MainConcept's mjpeg,
> claimed to reach realtime 640*480 on PII 300 Mhz (from settings probably
> one field only)). Found mencoder was doing 25 fps with binary encoder dll,

> ffmpeg 0.5.15 was doing up to 40 fps in mjpeg/i420 if compiled for i486,
> ffmpeg 4.4/latest was doing up to 20 fps. Not sure why, but it was
> interesting!

if you have time you could
git bisect
to identify tha cause, but it could be more than 1 commit
and it could be something boring like a change of quality vs speed settings

thx

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Frequently ignored answer#1 FFmpeg bugs should be sent to our bugtracker. User
questions about the command line tools should be sent to the ffmpeg-user ML.
And questions about how to use libav* should be sent to the libav-user ML.
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