2004.09.27 18:25 "[Tiff] Re: [Gdal-dev] update TIFF compressed files in place", by Andrey Kiselev

I work with CVS GDAL and play with the new feature "update TIFF compressed files in place" with gdalwarp ; my little tests work well except with a RGB file with JPEG compression:

Warning 1: JPEGLib:Application transferred too many scanlines
ERROR 1: JPEGLib:Improper call to JPEG library in state 101
Warning 1: JPEGLib:Application transferred too many scanlines
ERROR 1: JPEGLib:Improper call to JPEG library in state 101
Warning 1: JPEGLib:Application transferred too many scanlines

and the resulting file is wrong.

If I want to create a pixel interleaved file (-co INTERLEAVE=PIXEL) I have another error:

Warning 1: JPEGLib:Application transferred too many scanlines
gdalwarp: tif_jpeg.c:651: JPEGPreDecode: Assertion `sp->cinfo.comm.is_decompressor' failed.

and the resulting file is all black...

Julien,

I'm not sure that JPEG codec is able to work properly with that feature, but I will look at this.

Andrey

PS. I won't be available until the end of the week.

Andrey V. Kiselev
Home phone: +7 812 5274898 ICQ# 26871517