Why Avidemux changed scan type in MPEG file (stream copy)?

[cord-factor]

Hello, I need to cut video from frame X to frame Y. When I done it with ffmpeg it is all ok. For example frame 360 to frame 1317

Code Select Expand


$ ffmpeg -timecode_frame_start 360 -i uncut.mpg -vframes 957 -vcodec copy -acodec copy cut.mpg

scantype info for result file

Code Select Expand


***
Scan type                                : Interlaced
Scan order                               : Top Field First
***


But, If I do this in Avidemux (using copy option) it changes scantype to progressive, but scan order is present too 
mediainfo

Code Select Expand


Scan type                                : Progressive
Scan order                               : Top Field First

Why it is happens?

[cord-factor]

Source file to reproduce
http://dl.dropbox.com/u/59413997/1.mpg

[Agent_007]

IIRC there was/is ticket for this, I will check it during weekend.

[Agent_007]

Seems to be fixed in 2.6

[cord-factor]

Seems to be fixed in 2.6

Thanks. Will wait till 2.6 becomes "less-more" stable.