0000181: when using foreground with left-over, encoder always crash in case of qcif sequences

ID	Project	Category	View Status	Date Submitted	Last Update

0000181	JVT JM H.264/AVC reference software	encoder	public	2009-07-15 11:19	2009-07-15 14:29

Reporter	dannierzhong	Assigned To	Karsten Suehring
Priority	normal	Severity	crash	Reproducibility	always
Status	resolved	Resolution	fixed
Product Version	JM 16.0
Fixed in Version	JM 16.1

Summary	0000181: when using foreground with left-over, encoder always crash in case of qcif sequences
Description	with the same encoder.cfg, cif sequences can be successfully encoded when using FMO type2 ( foreground with left-over), while qcif sequences always can't. maybe there is some problem with sg2conf.cfg? Because there are only 99 MBs in qcif sequences. sg2conf.cfg is as follows: ------------------------------------------------------------------------- 24 122 58 108 odd number of rows: top left mapunit number even number of rows: bottom right of mapunit number ------------------------------------------------------------------------- Attached please find our encoder.cfg, lencode.exe and two qcif sequences.
Tags	No tags attached.

Date Modified	Username	Field	Change
2009-07-15 11:19	dannierzhong	New Issue
2009-07-15 14:29	Karsten Suehring	Note Added: 0000324
2009-07-15 14:29	Karsten Suehring	Status	new => resolved
2009-07-15 14:29	Karsten Suehring	Fixed in Version	=> JM 16.0-dev
2009-07-15 14:29	Karsten Suehring	Resolution	open => fixed
2009-07-15 14:29	Karsten Suehring	Assigned To	=> Karsten Suehring

Karsten Suehring 2009-07-15 14:29 administrator ~0000324	Yes, the map unit numbers were not clipped to the picture size which resulted in uninitialized memory access. I have added a check in my development version. Make sure the number in your config file do not exceed the number of macroblocks (or half that number if interlace is used) and the FMO type 2 should work without problems.