[gdal-dev] JPEG compression in TIF doesn't work

[Frank Warmerdam]

Smith, Michael wrote:
> I have an 8-bit tif aerial photo, when I try to compress it with JPEG
> compression in any of the following examples:
> 
> gdal_translate -ot Byte -of GTiff -co "COMPRESS=JPEG" -co
> "JPEG_QUALITY=100" allagash-lake.tif test_jpeg100_tif.tif
> gdal_translate -ot Byte -of GTiff -co "COMPRESS=JPEG" -co
> "JPEG_QUALITY=20" allagash-lake.tif test_jpeg20_tif.tif
> gdal_translate -ot Byte -of GTiff -co "COMPRESS=JPEG" allagash-lake.tif
> test_jpeg_tif.tif
> 
> I get the error message:
> 
> Warning 1: JPEGLib:Application transferred too many scanlines
> 
> And there is a small part at the bottom where the rows are all value 0
> (and they shouldn't be).  Looks like it skips the last 11 rows and sets
> them all to 0 (in an image that is 9728c x 13963r)

Michael,

What is the size of your input image in pixels and lines?

What does the gdalinfo report on the output file look like?

Best regards,
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