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IDProjectCategoryView StatusLast Update
0000124JVT JM H.264/AVC reference softwareencoder and decoderpublic2008-12-15 15:04
Reportertetzlaff Assigned ToKarsten Suehring  
PrioritynormalSeveritymajorReproducibilityalways
Status resolvedResolutionfixed 
Product VersionJM-14.1 
Fixed in VersionJM 15.0 
Summary0000124: lossless transform bypass and 4:4:4 does not work
DescriptionAttempting to encode a simple 1 macroblock 4:4:4 YUV file at Qp=0 and using lossless transform bypass.
The test_rec.yuv produced by the encoder does not match the inp.yuv file
The decoder is unable to decode the test.264 file.
inp.yuv and encoder.cfg file attached.

If the bypass flag is turned off, encoder and decoder results are OK.
TagsNo tags attached.

Activities

2008-08-20 23:58

 

lossless.bug.tar.gz (10,053 bytes)

Wige, Eugen

2008-12-01 13:39

reporter   ~0000252

Last edited: 2008-12-01 13:43

In the attached encoder.cfg the Intra 16x16 modes are disabled (DisableIntra16x16 =1). If you use a newer version (e.g. jm14.2) of the reference software, this problem occurs. If you use an older version (e.g. jm12.4) this problem does not occur.

In the new version (e.g. jm14.2) of the reference software the Intra 4x4 as well as the Inter prediction do not work when using the lossless encoding. So if you disable the Intra 16x16 mode the encoder does not work. Also if you enable the DisableIntraInInter flag the inter frames will not be coded.

Karsten Suehring

2008-12-15 15:04

administrator   ~0000262

Fixed in the upcoming release.

Issue History

Date Modified Username Field Change
2008-08-20 23:58 tetzlaff New Issue
2008-08-20 23:58 tetzlaff File Added: lossless.bug.tar.gz
2008-12-01 13:39 Wige, Eugen Note Added: 0000252
2008-12-01 13:39 Wige, Eugen Note Edited: 0000252
2008-12-01 13:43 Wige, Eugen Note Edited: 0000252
2008-12-15 15:04 Karsten Suehring Note Added: 0000262
2008-12-15 15:04 Karsten Suehring Status new => resolved
2008-12-15 15:04 Karsten Suehring Fixed in Version => JM 14.2-dev
2008-12-15 15:04 Karsten Suehring Resolution open => fixed
2008-12-15 15:04 Karsten Suehring Assigned To => Karsten Suehring