JPEG to PNG (via CLI)

Is there any command-line utility for amiga that converts a jpeg image into a png image ?

[daxb]

PNGTool

[kriz]

Short: Converts any type of image to PNG (1.4)
Author: Stephan Rupprecht <stephan.rupprecht@gmx.net>
Uploader: stephan rupprecht gmx net
Type: gfx/conv
Architecture: m68k-amigaos; ppc-warpup

HISTORY
1.0 first public release.
1.0a added PPC version for WarpUP.
1.1 requires asyncio.library v40, now. This increases the speed
of both versions by 3% It also lessens the 68k load when
using the ppc version even though the ppc load has increased.
The ppc version now uses a more recent release of libpng
and zlib making the executable ~30kb smaller. added SCALE/N/K
option (requires pictdt v45) and TRANSPARENT/N/K. added
spanish translation of the doc by D.Dominguez.
1.2 added A=ALPHAMASK/K option due to heavy demand (two users.
1.3 handling of HAM images was broken <Philippe Bovier>.
1.4 linked with latest release of libpng and zlib.


============================= Archive contents =============================

Original Packed Ratio Date Time Name
-------- ------- ----- --------- -------- -------------
86380 47126 45.4% 29-Oct-02 21:46:18 +pngtool
4021 2055 48.8% 29-Oct-02 21:38:20 +PNGTool.doc
122564 54287 55.7% 29-Oct-02 21:47:06 +pngtoolPPC
5568 2638 52.6% 17-May-02 16:26:42 +PNGTool_español.doc
-------- ------- ----- --------- --------
218533 106106 51.4% 29-Oct-02 21:47:58 4 files

http://aminet.net/gfx/conv/PNGTool.lha

thanks