id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc 196,Enc/Dec mismatch for Inter MTS in class F,chollmann,,"Encoder/decoder mismatch for class F random access if MTS is enabled for inter when using parallel encoding. Example: SlideEdit, QP22 When encoding part 7 (33 frames starting at #224) the resulting values for the I-frame #224 are: 653360 bits [Y 50.7612 dB U 48.0983 dB V 48.3139 dB] When running a single thread encoding the resulting values for the same I-frame #224 are: 654320 bits [Y 50.7300 dB U 48.1538 dB V 48.3735 dB] Following frames are affected and differ until the next I-frame (#256) is reached. This frame is identical for both encodings (as well as an encode of only part 8 starting at frame #256) and subsequent frames are identical. Doing a partial encode for parts 6 and 7 (65 frames starting at #192) yields identical results to the corresponding frames of the complete encoding. Similar mismatches can be found in other class F sequences (ArenaOfValor, BasketballDrillText). Binaries are based on VTM-4.0 (commit 20671d8e). Commands: Only part 7: bin/EncoderAppStatic_VTM-4.0 -c cfg/encoder_randomaccess_vtm.cfg -c cfg/per-class/classF.cfg -c cfg/per-sequence/SlideEditing.cfg -i SlideEditing_1280x720_30.yuv -b SlideEdit7.bin -o SlideEdit7_rec.yuv -q 22 --MTS=3 -fs 224 -f 33 Entire sequence: bin/EncoderAppStatic_VTM-4.0 -c cfg/encoder_randomaccess_vtm.cfg -c cfg/per-class/classF.cfg -c cfg/per-sequence/SlideEditing.cfg -i SlideEditing_1280x720_30.yuv -b SlideEdit.bin -o SlideEdit_rec.yuv -q 22 --MTS=3 Attached files: logs for part 7 of SlideEdit and full sequence",defect,closed,minor,VTM-4.0.1,VTM,VTM-4.0,fixed,"MTS, RA",ksuehring XiangLi fbossen jvet@…