[MPlayer-users] Is this an mencoder bug? (was: help w/ encoding an avi file from sequence of .png files)
Dean S. Messing
deanm at sharplabs.com
Mon Jan 27 07:56:58 CET 2003
Frederick Bruckman wrote:
:: On Sat, 25 Jan 2003, Dean S. Messing wrote:
::
:: > Frederick Bruckman wrote:
:: > :: On Fri, 24 Jan 2003, Dean S. Messing wrote:
:: > ::
:: > :: > => mencoder *.png -mf on:w=325:h=407:fps=15:type=png -ovc rawrgb -o output.avi
::
:: > But I can't get it to play either with MPlayer or with Windoze Media
:: > player. The latter is (unfortunately) more important because I must
:: > send this experimental sequence to my counterparts in Corporate
:: > Headquarters. They are all Windoze Weenies.
::
:: I just tried some quick tests with -mf on:type=png, and the resulting
:: files were unplayable for me, too. I seem to remember now, from the
:: last time I managed to create a "slideshow" with mplayer, that it only
:: works with jpegs. Also, you need to make sure all the input files have
:: exactly the same dimensions, or it runs off the rails. What I ended up
:: doing was re-scaling with ImageMagick to very high quality (and very
:: large) jpegs, and encoding with "mplayer ... -ovc lavc" and the
:: resulting avi came out looking pretty good -- the paused mplayer
:: window is essentially indistinguishable from the original jpegs,
:: as viewed with ImageMagick.
::
:: I built against png-1.2.5, so maybe that works for someone else.
:: ("mplayer -vo png" works fine.)
Thanks for trying this on your side. I compiled against png-1.2.4
which I got off the Mandrake Cooker site as of Jan. 16th.
The image seq. files are all the same size and format.
Jpeg is _not_ an option for me. These are visual
experimental data with a lot of high
frequency content, including zoneplates; jpeg will wreak havoc
with them. The .avi needs to be uncompressed.
Is this a bug? Surely Mencoder ought to be able to put simple
rgb files (in png format) into an .avi ?
By the way, I tried -ovc copy and mplayer _would_ play the
resulting .avi but windows media play would not. It
doesn't know what an "mpng" file is. These _must_
be playable under Windows (unfortunately).
I hope the Big Guns can chime in here and tell me what
to do. Seems like a bug to me.
Dean S. Messing
Display Algorithms & Visual Optimization Lab
Information Systems Technologies Dept.
Sharp Laboratories of America
E-Mail: deanm at sharplabs.com
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