0000123: SP2 encoded stream with incorrect chrominance

ID	Project	Category	View Status	Date Submitted	Last Update

0000123	JVT JM H.264/AVC reference software	encoder	public	2008-08-18 16:38	2008-09-02 16:03

Reporter	-	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Product Version	JM-14.1

Summary	0000123: SP2 encoded stream with incorrect chrominance
Description	First I encoded a low_quality and high_quality SP stream using following SP settings. Everything's good so far. ### SPPicturePeriodicity = 1 QPSPSlice = 20 QPSP2Slice = 20 SI_FRAMES = 0 SP_output = 1 SP_output_name = "low_quality.dat" # 1st time, 2nd "high_quality.dat" SP2_FRAMES = 0 SP2_input_name1 = "high_quality.dat" SP2_input_name2 = "low_quality.dat" ### Then I tried the following: ### SPPicturePeriodicity = 1 QPSPSlice = 20 QPSP2Slice = 20 SI_FRAMES = 0 SP_output = 0 SP_output_name = "low_quality.dat" SP2_FRAMES = 1 SP2_input_name1 = "high_quality.dat" SP2_input_name2 = "low_quality.dat" ### I thougt it would give a stream encoded out of the informations from low_quality.dat and high_quality.dat. Result: The listed SNR values are bad for U and V component. Decoding the stream shows: Liminance is okay, Chrominance is incorrect, the whole video stream is green (exclusive the first frame - IDR). It's a video of type YUV 4:2:0. I only changed the listed parameters. My fault? Encoder problem?
Tags	No tags attached.

Date Modified	Username	Field	Change
2008-08-18 16:38	-	New Issue
2008-09-02 11:17	-	Note Added: 0000226
2008-09-02 16:03	Karsten Suehring	Relationship added	duplicate of 0000061

- 2008-09-02 11:17 reporter ~0000226	For addition: It's not exclusive the first frame, it's excluding the first frame. All SP2 (and only these) frames are affected by the incorrect chrominiance. When using I or P frames between the SP2 these frame (I and P) are correct. I tried with different QP, everytime the same.