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I've been trying to use mencoder under Linux to generate MPEG
animations, with only partial success. I can get a mostly-working
animation, but the image is squashed into a square on the left side, and
it won't play properly in Quicktime. And there's a huge number of
options, the documentation is mixed in with a bunch of other junk, and I
can't find any tutorials...any suggestions?
Alternatively, maybe someone can suggest another encoder...
--
Christopher James Huff <cja### [at] earthlink net>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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Christopher James Huff schrieb:
> I've been trying to use mencoder under Linux to generate MPEG
> animations, with only partial success.
> I can't find any tutorials...any suggestions?
Have you looked at "Chapter 7. Encoding with MEncoder" in the documentation?
http://www.mplayerhq.hu/DOCS/HTML/en/mencoder.html
The first two subchapters are about encoding MPEG animations.
There is also a file with encoding tips:
http://www.mplayerhq.hu/DOCS/tech/encoding-tips.txt
Just my 2 eurocents,
Bonsai
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From: Wolfgang Wieser
Subject: Re: Tips for using mencoder (or other encoders)?
Date: 3 Dec 2003 12:58:29
Message: <3fce2444@news.povray.org>
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Christopher James Huff wrote:
> I've been trying to use mencoder under Linux to generate MPEG
> animations, with only partial success. I can get a mostly-working
> animation, but the image is squashed into a square on the left side, and
> it won't play properly in Quicktime. And there's a huge number of
> options, the documentation is mixed in with a bunch of other junk, and I
> can't find any tutorials...any suggestions?
>
If the image disortion is 1/4 black, it may be a 4-byte RBG versus
3-byte RGB problem, notably when encoding from non-YUV sources (i.e.
not jpeg). I once wrote a very dirty patch to make PNG -> MPEG encoding
work but it will not apply to recent versions.
Hard to tell more from your unspecific description "won't play properly".
Ah, and don't use too many fancy flags with MPEG1, a lot of them
need higher versions (mpeg4).
Just what came to my mind...
Wolfgang
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In article <3fce2444@news.povray.org>, Wolfgang Wieser <wwi### [at] gmxde>
wrote:
> If the image disortion is 1/4 black, it may be a 4-byte RBG versus
> 3-byte RGB problem, notably when encoding from non-YUV sources (i.e.
> not jpeg). I once wrote a very dirty patch to make PNG -> MPEG encoding
> work but it will not apply to recent versions.
Great...I've been trying to encode from PNG.
> Hard to tell more from your unspecific description "won't play properly".
Starts playing ok, except that the right 1/4 of the image is black and
the actual contents of the movie are squashed into a square on the left
side, and about 1/4 of the way into the movie it sometimes stops
playing. Playback is jerkier than it should be.
> Ah, and don't use too many fancy flags with MPEG1, a lot of them
> need higher versions (mpeg4).
I don't even know any "fancy flags". I'm just trying to get something to
work. And the error messages are incredibly unhelpful...
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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In article <3fcd957d$1@news.povray.org>, Bonsai <bon### [at] b0n541net>
wrote:
> Have you looked at "Chapter 7. Encoding with MEncoder" in the documentation?
>
> http://www.mplayerhq.hu/DOCS/HTML/en/mencoder.html
>
> The first two subchapters are about encoding MPEG animations.
The command lines options they give don't work. They sometimes give
errors (something about parsing the command line...no more information
given), and sometimes just don't do anything (program starts, writes
some info to the screen, and quits without giving any reason). That
documentation seems to be out of date as well...I get a message that -mf
is deprecated, but no information about what to do instead.
I'm now trying with TGA format images, hopefully this will work...
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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In article <cja### [at] netplexaussieorg>,
Christopher James Huff <cja### [at] earthlinknet> wrote:
> I'm now trying with TGA format images, hopefully this will work...
It did: http://home.earthlink.net/~cjameshuff/files/test.mpeg
(A test image from some patches I've been working on...can you guess
what I did?)
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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On Wed, 03 Dec 2003 15:59:48 -0500, Christopher James Huff
<cja### [at] earthlinknet> wrote:
> can you guess what I did?
Like typical newbie you started from sphere over plane but I noticed
strange distortions in reflectivity and in checkered pattern ;-)
ABX
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In article <taltsv8rnthtb66fh9jd2ftvhnbtp9nge0@4ax.com>,
ABX <abx### [at] abxartpl> wrote:
> On Wed, 03 Dec 2003 15:59:48 -0500, Christopher James Huff
> <cja### [at] earthlinknet> wrote:
> > can you guess what I did?
>
> Like typical newbie you started from sphere over plane but I noticed
> strange distortions in reflectivity and in checkered pattern ;-)
No reflectivity. No normal either...just a pigment. And the pigment is
constant, it doesn't change with time. ;-)
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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From: Wolfgang Wieser
Subject: Re: Tips for using mencoder (or other encoders)?
Date: 4 Dec 2003 16:04:24
Message: <3fcfa157@news.povray.org>
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Christopher James Huff wrote:
> In article <3fce2444@news.povray.org>, Wolfgang Wieser <wwi### [at] gmxde>
> wrote:
>
>> If the image disortion is 1/4 black, it may be a 4-byte RBG versus
>> 3-byte RGB problem, notably when encoding from non-YUV sources (i.e.
>> not jpeg). I once wrote a very dirty patch to make PNG -> MPEG encoding
>> work but it will not apply to recent versions.
>
> Great...I've been trying to encode from PNG.
>
Try encoding from multiple jpegs. If the problem persists, it is not
related to the mentioned colorspace convention bug. Otherwise it
probably is.
I'm sorry for not testing myself but I currently lack a recent version
and am just too busy with other things.
>> Hard to tell more from your unspecific description "won't play properly".
>
> Starts playing ok, except that the right 1/4 of the image is black and
> the actual contents of the movie are squashed into a square on the left
> side, and about 1/4 of the way into the movie it sometimes stops
> playing. Playback is jerkier than it should be.
>
Reminds me of the color conv problem.
I had color disortion in addition to the 1/4 screen problem.
Maybe I can look into that at the weekend; stay tuned :)
Wolfgang
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In article <3fcfa157@news.povray.org>, Wolfgang Wieser <wwi### [at] gmxde>
wrote:
> Try encoding from multiple jpegs. If the problem persists, it is not
> related to the mentioned colorspace convention bug. Otherwise it
> probably is.
You're a bit behind...I successfully did it with TGA files. Which means
I'll have to convert to PNG if I want to archive an animation, and
convert back to TGA to make another movie...but I probably won't be
doing that kind of thing much anyway.
--
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/
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