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more documentation on FFMPEG and PNG support and some corrections

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This commit is contained in:
Axel Kohlmeyer
2013-11-03 03:37:21 +01:00
parent fad1de3501
commit fe944a93da
2 changed files with 23 additions and 10 deletions
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14
doc/Section_start.txt
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@ -183,6 +183,7 @@ within the LAMMPS code. The options that are currently recogized are:
-DLAMMPS_GZIP
-DLAMMPS_JPEG
-DLAMMPS_PNG
-DLAMMPS_FFMPEG
-DLAMMPS_MEMALIGN
-DLAMMPS_XDR
-DLAMMPS_SMALLBIG
@ -194,8 +195,9 @@ within the LAMMPS code. The options that are currently recogized are:
-DPACK_MEMCPY :ul
The read_data and dump commands will read/write gzipped files if you
compile with -DLAMMPS_GZIP. It requires that your Unix support the
"popen" command.
compile with -DLAMMPS_GZIP. It requires that your machine supports the
"popen" function in the standard runtime library and that a gzip executable
can be found by LAMMPS during a run.
If you use -DLAMMPS_JPEG, the "dump image"_dump.html command will be
able to write out JPEG image files. For JPEG files, you must also link
@ -203,9 +205,15 @@ LAMMPS with a JPEG library, as described below. If you use
-DLAMMPS_PNG, the "dump image"_dump.html command will be able to write
out PNG image files. For PNG files, you must also link LAMMPS with a
PNG library, as described below. If neither of those two defines are
used, LAMMPS will only be able to write out text-based PPM image
used, LAMMPS will only be able to write out uncompressed PPM image
files.
If you use -DLAMMPS_FFMPEG, the "dump movie"_dump.html command will
be available to support on-the-fly generation of rendered movies
the need to store intermediate image files. It requires that your
machines supports the "popen" function in the standard runtime library
and that an FFmpeg executable can be found by LAMMPS during the run.
Using -DLAMMPS_MEMALIGN=<bytes> enables the use of the
posix_memalign() call instead of malloc() when large chunks or memory
are allocated by LAMMPS. This can help to make more efficient use of

19
doc/dump_image.txt
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@ -373,9 +373,10 @@ shading is performed.
:line
A series of JPG or PPM images can be converted into a movie file and
then played as a movie using commonly available tools. Using the
movie dump style skips this intermediate step
A series of JPG, PNG, or PPM images can be converted into a movie file
and then played as a movie using commonly available tools. Using the
movie dump style skips this intermediate step, but requires LAMMPS to
be compiled with -DLAMMPS_FFMPEG and an FFmpeg executable installed.
Convert JPG or PPM files into an animated GIF or MPEG or other movie
file:
@ -427,10 +428,14 @@ per-atom quantities which could then be output into dump files.
[Restrictions:]
To write JPG images, you must use a -DLAMMPS_JPEG switch when building
LAMMPS and link with a JPEG library. See the "Making
LAMMPS"_Section_start.html#start_2_4 section of the documentation for
details.
To write JPG images, you must use the -DLAMMPS_JPEG switch when building
LAMMPS and link with a JPEG library. To write PNG images, you must
use the -DLAMMPS_PNG switch when building LAMMPS and link with a PNG library.
To write {movie} dumps, you must use the -DLAMMPS_FFMPEG switch when
building LAMMPS and have the FFmpeg executable available on the machine
where LAMMPS is being run. See the
"Making LAMMPS"_Section_start.html#start_2_4 section of the documentation
for details.
[Related commands:]