Handbrake Version: 1.9.0 (2024120700) [21:03:52] gtkgui: Modified Custom Preset: /General/Default 4K [21:03:52] Starting work at: Mon Dec 16 21:03:52 2024 [21:03:52] 1 job(s) to process [21:03:52] json job: { "Audio": { "AudioList": [ { "Bitrate": 160, "DRC": 0.0, "Encoder": "copy:truehd", "Gain": 0.0, "Mixdown": "none", "Quality": -3.0, "Samplerate": 0, "Track": 2 }, { "Bitrate": 160, "DRC": 0.0, "Encoder": "copy:ac3", "Gain": 0.0, "Mixdown": "none", "Quality": -3.0, "Samplerate": 0, "Track": 3 }, { "Bitrate": 160, "DRC": 0.0, "Encoder": "copy:ac3", "Gain": 0.0, "Mixdown": "none", "Quality": -3.0, "Samplerate": 0, "Track": 5 }, { "Bitrate": 160, "DRC": 0.0, "Encoder": "copy:ac3", "Gain": 0.0, "Mixdown": "none", "Quality": -3.0, "Samplerate": 0, "Track": 6 }, { "Bitrate": 160, "DRC": 0.0, "Encoder": "copy:ac3", "Gain": 0.0, "Mixdown": "none", "Quality": -3.0, "Samplerate": 0, "Track": 7 }, { "Bitrate": 160, "DRC": 0.0, "Encoder": "copy:dts", "Gain": 0.0, "Mixdown": "none", "Quality": -3.0, "Samplerate": 0, "Track": 8 } ], "CopyMask": [ "copy:aac" ], "FallbackEncoder": "fdk_aac" }, "Destination": { "AlignAVStart": false, "ChapterList": [ { "Duration": { "Hours": 0, "Minutes": 0, "Seconds": 8, "Ticks": 720720 }, "Name": "Chapter 1" }, { "Duration": { "Hours": 0, "Minutes": 1, "Seconds": 41, "Ticks": 9099090 }, "Name": "Chapter 2" }, { "Duration": { "Hours": 0, "Minutes": 6, "Seconds": 24, "Ticks": 34575790 }, "Name": "Chapter 3" }, { "Duration": { "Hours": 0, "Minutes": 10, "Seconds": 39, "Ticks": 57507450 }, "Name": "Chapter 4" }, { "Duration": { "Hours": 0, "Minutes": 8, "Seconds": 29, "Ticks": 45852056 }, "Name": "Chapter 5" }, { "Duration": { "Hours": 0, "Minutes": 10, "Seconds": 58, "Ticks": 59207900 }, "Name": "Chapter 6" }, { "Duration": { "Hours": 0, "Minutes": 7, "Seconds": 29, "Ticks": 40394104 }, "Name": "Chapter 7" }, { "Duration": { "Hours": 0, "Minutes": 10, "Seconds": 20, "Ticks": 55833276 }, "Name": "Chapter 8" }, { "Duration": { "Hours": 0, "Minutes": 1, "Seconds": 7, "Ticks": 6069814 }, "Name": "Chapter 9" } ], "ChapterMarkers": true, "File": "/output/TV/Game of Thrones/1x03.mkv", "InlineParameterSets": false, "Mux": "mkv", "Options": { "IpodAtom": false, "Optimize": false } }, "Filters": { "FilterList": [ { "ID": 4, "Settings": { "block-height": "16", "block-thresh": "40", "block-width": "16", "filter-mode": "2", "mode": "3", "motion-thresh": "1", "spatial-metric": "2", "spatial-thresh": "1" } }, { "ID": 6, "Settings": { "mode": "7" } }, { "ID": 11, "Settings": { "mode": 2, "rate": "27000000/900000" } }, { "ID": 20, "Settings": { "crop-bottom": 0, "crop-left": 0, "crop-right": 0, "crop-top": 0, "height": 1080, "width": 1920 } } ] }, "Metadata": {}, "PAR": { "Den": 1, "Num": 1 }, "SequenceID": 0, "Source": { "Angle": 0, "HWDecode": 0, "KeepDuplicateTitles": false, "Path": "/storage/FullDisc/GAMEOFTHRONES_S1_D2", "Range": { "End": 9, "Start": 1, "Type": "chapter" }, "Title": 77 }, "Subtitle": { "Search": { "Burn": true, "Default": false, "Enable": false, "Forced": false }, "SubtitleList": [ { "Burn": false, "Default": false, "Forced": false, "Track": 0 }, { "Burn": false, "Default": false, "Forced": false, "Track": 1 }, { "Burn": false, "Default": false, "Forced": false, "Track": 2 }, { "Burn": false, "Default": false, "Forced": false, "Track": 3 }, { "Burn": false, "Default": false, "Forced": false, "Track": 4 }, { "Burn": false, "Default": false, "Forced": false, "Track": 5 }, { "Burn": false, "Default": false, "Forced": false, "Track": 6 }, { "Burn": false, "Default": false, "Forced": false, "Track": 7 }, { "Burn": false, "Default": false, "Forced": false, "Track": 8 }, { "Burn": false, "Default": false, "Forced": false, "Track": 9 }, { "Burn": false, "Default": false, "Forced": false, "Track": 10 }, { "Burn": false, "Default": false, "Forced": false, "Track": 11 }, { "Burn": false, "Default": false, "Forced": false, "Track": 12 }, { "Burn": false, "Default": false, "Forced": false, "Track": 13 }, { "Burn": false, "Default": false, "Forced": false, "Track": 14 } ] }, "Video": { "ChromaLocation": 1, "ColorInputFormat": 0, "ColorMatrix": 1, "ColorOutputFormat": 0, "ColorPrimaries": 1, "ColorRange": 1, "ColorTransfer": 1, "Encoder": "x264", "HardwareDecode": 0, "Level": "4.0", "MultiPass": false, "Options": "", "Preset": "fast", "Profile": "main", "QSV": { "AdapterIndex": 0, "AsyncDepth": 0, "Decode": false }, "Quality": 18.0, "Tune": "", "Turbo": false } } [21:03:52] CPU: AMD Ryzen 9 3900X 12-Core Processor [21:03:52] - logical processor count: 14 [21:03:52] Intel Quick Sync Video support: no [21:03:52] hb_scan: path=/storage/FullDisc/GAMEOFTHRONES_S1_D2, title_index=77 bdj.c:795: BD-J check: Failed to load JVM library bdj.c:795: BD-J check: Failed to load JVM library [21:03:52] scan: BD has 85 title(s) [21:03:52] bd: scanning title 77 [21:03:52] bd: playlist 00822.MPLS [21:03:52] bd: duration is 00:57:16 (3436474 ms) [21:03:52] bd: video id=0x1011, stream type=H.264, format 1080p [21:03:52] bd: aspect = 16:9 [21:03:52] bd: audio id=0x1100, lang=English (AC3), 3cc=eng [21:03:52] bd: audio id=0x761101, lang=English (AC3), 3cc=eng [21:03:52] bd: audio id=0x721101, lang=English (TrueHD), 3cc=eng [21:03:52] bd: audio id=0x1102, lang=Francais (AC3), 3cc=fra [21:03:52] bd: audio id=0x1103, lang=español (AC3), 3cc=spa [21:03:52] bd: audio id=0x1104, lang=español (AC3), 3cc=spa [21:03:52] bd: audio id=0x1105, lang=Deutsch (AC3), 3cc=deu [21:03:52] bd: audio id=0x1106, lang=italiano (AC3), 3cc=ita [21:03:52] bd: audio id=0x1107, lang=Portugues (DTS), 3cc=por [21:03:52] bd: audio id=0x1108, lang=English (AC3), 3cc=eng [21:03:52] bd: audio id=0x1a00, lang=English (Unknown FFmpeg), 3cc=eng [21:03:52] bd: subtitle id=0x1200, lang=English (PGS), 3cc=eng [21:03:52] bd: subtitle id=0x1201, lang=Francais (PGS), 3cc=fra [21:03:52] bd: subtitle id=0x1202, lang=español (PGS), 3cc=spa [21:03:52] bd: subtitle id=0x1203, lang=español (PGS), 3cc=spa [21:03:52] bd: subtitle id=0x1204, lang=Deutsch (PGS), 3cc=deu [21:03:52] bd: subtitle id=0x1205, lang=italiano (PGS), 3cc=ita [21:03:52] bd: subtitle id=0x1206, lang=Portugues (PGS), 3cc=por [21:03:52] bd: subtitle id=0x1207, lang=Nederlands (PGS), 3cc=nld [21:03:52] bd: subtitle id=0x1208, lang=dansk (PGS), 3cc=dan [21:03:52] bd: subtitle id=0x1209, lang=suomi (PGS), 3cc=fin [21:03:52] bd: subtitle id=0x120a, lang=norsk (PGS), 3cc=nor [21:03:52] bd: subtitle id=0x120b, lang=svenska (PGS), 3cc=swe [21:03:52] bd: subtitle id=0x120c, lang=中文 (PGS), 3cc=zho [21:03:52] bd: subtitle id=0x120d, lang=čeština (PGS), 3cc=ces [21:03:52] bd: subtitle id=0x120e, lang=ไทย (PGS), 3cc=tha [21:03:52] bd: chap 1, 8008 ms [21:03:52] bd: chap 2, 101101 ms [21:03:52] bd: chap 3, 384175 ms [21:03:52] bd: chap 4, 638971 ms [21:03:52] bd: chap 5, 509467 ms [21:03:52] bd: chap 6, 657865 ms [21:03:52] bd: chap 7, 448823 ms [21:03:52] bd: chap 8, 620369 ms [21:03:52] bd: chap 9, 67442 ms [21:03:52] bd: chapter 10 too short 309260200, dropping [21:03:52] bd: title 77 has 9 chapters [21:03:52] scan: decoding previews for title 77 [21:03:52] scan: title angle(s) 1 [21:03:52] scan: audio 0x1107: dca, rate=48000Hz, bitrate=768000 Portugues (DTS, 2.0 ch, Lt/Rt), 768 kbps) [21:03:52] scan: audio 0x1a00: eac3, rate=48000Hz, bitrate=192000 English (E-AC3, Secondary, 2.0 ch, 192 kbps) [21:03:52] scan: audio 0x1103: ac3, rate=48000Hz, bitrate=256000 español (AC3, 2.0 ch, Dolby Surround, 256 kbps) [21:03:52] scan: audio 0x1102: ac3, rate=48000Hz, bitrate=448000 Francais (AC3, 5.1 ch, 448 kbps) [21:03:52] scan: audio 0x1104: ac3, rate=48000Hz, bitrate=448000 español (AC3, 5.1 ch, 448 kbps) [21:03:52] scan: audio 0x1105: ac3, rate=48000Hz, bitrate=448000 Deutsch (AC3, 5.1 ch, 448 kbps) [21:03:52] scan: audio 0x1106: ac3, rate=48000Hz, bitrate=448000 italiano (AC3, 5.1 ch, 448 kbps) [21:03:52] scan: audio 0x1108: ac3, rate=48000Hz, bitrate=448000 English (AC3, 5.1 ch, 448 kbps) [21:03:52] scan: audio 0x1100: ac3, rate=48000Hz, bitrate=640000 English (AC3, 5.1 ch, 640 kbps) [21:03:52] scan: audio 0x761101: ac3, rate=48000Hz, bitrate=640000 English (AC3, 5.1 ch, Dolby Digital EX, 640 kbps) [21:03:52] scan: audio 0x721101: truehd, rate=48000Hz, bitrate=1 English (Dolby TrueHD + Dolby Atmos, 7.1 ch) [21:03:55] using container PAR 1:1 [21:03:55] scan: 10 previews, 1920x1080, 23.976 fps, autocrop = 0/0/0/0, aspect 16:9, PAR 1:1, color profile: 1-1-1, chroma location: left [21:03:55] stream: 7 good frames, 0 errors (0%) [21:03:55] libhb: scan thread found 1 valid title(s) [21:03:55] Starting Task: Encoding Pass [21:03:55] work: skipping crop/scale filter [21:03:55] job configuration: [21:03:55] * source [21:03:55] + /storage/FullDisc/GAMEOFTHRONES_S1_D2 [21:03:55] + title 77, chapter(s) 1 to 9 [21:03:55] * destination [21:03:55] + /output/TV/Game of Thrones/1x03.mkv [21:03:55] + container: Matroska (libavformat) [21:03:55] + chapter markers [21:03:55] * video track [21:03:55] + decoder: h264 8-bit (yuv420p) [21:03:55] + bitrate 200 kbps [21:03:55] + filters [21:03:55] + Comb Detect (mode=3:spatial-metric=2:motion-thresh=1:spatial-thresh=1:filter-mode=2:block-thresh=40:block-width=16:block-height=16) [21:03:55] + Decomb (mode=39) [21:03:55] + Framerate Shaper (mode=2:rate=27000000/900000) [21:03:55] + frame rate: 23.976 fps -> peak rate limited to 30.000 fps [21:03:55] + Output geometry [21:03:55] + storage dimensions: 1920 x 1080 [21:03:55] + pixel aspect ratio: 1 : 1 [21:03:55] + display dimensions: 1920 x 1080 [21:03:55] + encoder: H.264 (libx264) [21:03:55] + preset: fast [21:03:55] + profile: main [21:03:55] + level: 4.0 [21:03:55] + quality: 18.00 (RF) [21:03:55] + color profile: 1-1-1 [21:03:55] + color range: tv [21:03:55] + chroma location: left [21:03:55] * subtitle track 1, English (PGS) (track 0, id 0x1200, Picture) -> Passthru [21:03:55] * subtitle track 2, Francais (PGS) (track 1, id 0x1201, Picture) -> Passthru [21:03:55] * subtitle track 3, español (PGS) (track 2, id 0x1202, Picture) -> Passthru [21:03:55] * subtitle track 4, español (PGS) (track 3, id 0x1203, Picture) -> Passthru [21:03:55] * subtitle track 5, Deutsch (PGS) (track 4, id 0x1204, Picture) -> Passthru [21:03:55] * subtitle track 6, italiano (PGS) (track 5, id 0x1205, Picture) -> Passthru [21:03:55] * subtitle track 7, Portugues (PGS) (track 6, id 0x1206, Picture) -> Passthru [21:03:55] * subtitle track 8, Nederlands (PGS) (track 7, id 0x1207, Picture) -> Passthru [21:03:55] * subtitle track 9, dansk (PGS) (track 8, id 0x1208, Picture) -> Passthru [21:03:55] * subtitle track 10, suomi (PGS) (track 9, id 0x1209, Picture) -> Passthru [21:03:55] * subtitle track 11, norsk (PGS) (track 10, id 0x120a, Picture) -> Passthru [21:03:55] * subtitle track 12, svenska (PGS) (track 11, id 0x120b, Picture) -> Passthru [21:03:55] * subtitle track 13, 中文 (PGS) (track 12, id 0x120c, Picture) -> Passthru [21:03:55] * subtitle track 14, čeština (PGS) (track 13, id 0x120d, Picture) -> Passthru [21:03:55] * subtitle track 15, ไทย (PGS) (track 14, id 0x120e, Picture) -> Passthru [21:03:55] * audio track 1 [21:03:55] + decoder: English (Dolby TrueHD + Dolby Atmos, 7.1 ch) (track 3, id 0x721101) [21:03:55] + samplerate: 48000 Hz [21:03:55] + TrueHD Passthru [21:03:55] * audio track 2 [21:03:55] + decoder: Francais (AC3, 5.1 ch, 448 kbps) (track 4, id 0x1102) [21:03:55] + bitrate: 448 kbps, samplerate: 48000 Hz [21:03:55] + AC3 Passthru [21:03:55] * audio track 3 [21:03:55] + decoder: español (AC3, 5.1 ch, 448 kbps) (track 6, id 0x1104) [21:03:55] + bitrate: 448 kbps, samplerate: 48000 Hz [21:03:55] + AC3 Passthru [21:03:55] * audio track 4 [21:03:55] + decoder: Deutsch (AC3, 5.1 ch, 448 kbps) (track 7, id 0x1105) [21:03:55] + bitrate: 448 kbps, samplerate: 48000 Hz [21:03:55] + AC3 Passthru [21:03:55] * audio track 5 [21:03:55] + decoder: italiano (AC3, 5.1 ch, 448 kbps) (track 8, id 0x1106) [21:03:55] + bitrate: 448 kbps, samplerate: 48000 Hz [21:03:55] + AC3 Passthru [21:03:55] * audio track 6 [21:03:55] + decoder: Portugues (DTS, 2.0 ch, Lt/Rt), 768 kbps) (track 9, id 0x1107) [21:03:55] + bitrate: 768 kbps, samplerate: 48000 Hz [21:03:55] + DTS Passthru bdj.c:795: BD-J check: Failed to load JVM library bdj.c:795: BD-J check: Failed to load JVM library [21:03:55] sync: expecting 82392 video frames [21:03:55] encx264: min-keyint: 24, keyint: 240 [21:03:55] encx264: encoding at constant RF 18.000000 [21:03:55] encx264: unparsed options: level=4.0:ref=2:8x8dct=0:weightp=1:subme=6:vbv-bufsize=25000:vbv-maxrate=20000:rc-lookahead=30 x264 [info]: using SAR=1/1 x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 x264 [info]: profile Main, level 4.0, 4:2:0, 8-bit [21:03:55] sync: first pts audio 0x721101 is 0 [21:03:55] sync: first pts video is 0 [21:03:55] sync: "Chapter 1" (1) at frame 1 time 0 [21:03:55] sync: first pts audio 0x1102 is 0 [21:03:55] sync: first pts audio 0x1104 is 0 [21:03:55] sync: first pts audio 0x1105 is 0 [21:03:55] sync: first pts audio 0x1106 is 0 [21:03:56] sync: first pts audio 0x1107 is 180180 [21:03:58] sync: "Chapter 2" (2) at frame 181 time 675675 [21:04:00] sync: first pts subtitle 0x120c is 1189938 [21:04:51] sync: first pts subtitle 0x120e is 8836327 [21:04:51] sync: first pts subtitle 0x120d is 8851342 [21:04:57] sync: "Chapter 3" (3) at frame 2607 time 9782272 [21:05:07] sync: first pts subtitle 0x1200 is 12271008 [21:05:07] sync: first pts subtitle 0x1201 is 12271008 [21:05:07] sync: first pts subtitle 0x1202 is 12271008 [21:05:07] sync: first pts subtitle 0x1203 is 12271008 [21:05:07] sync: first pts subtitle 0x1204 is 12271008 [21:05:07] sync: first pts subtitle 0x1205 is 12271008 [21:05:07] sync: first pts subtitle 0x1206 is 12271008 [21:05:07] sync: first pts subtitle 0x1207 is 12271008 [21:05:07] sync: first pts subtitle 0x1208 is 12271008 [21:05:07] sync: first pts subtitle 0x1209 is 12271008 [21:05:07] sync: first pts subtitle 0x120a is 12271008 [21:05:07] sync: first pts subtitle 0x120b is 12271008 [21:07:32] sync: "Chapter 4" (4) at frame 11828 time 44395601 [21:11:47] sync: "Chapter 5" (5) at frame 27148 time 101903051 [21:15:15] sync: "Chapter 6" (6) at frame 39363 time 147755107 [21:19:43] sync: "Chapter 7" (7) at frame 55136 time 206963006 [21:22:50] sync: "Chapter 8" (8) at frame 65897 time 247357110 [21:27:08] sync: "Chapter 9" (9) at frame 80767 time 303175372 [21:27:22] reader: end of chapter 9 (media 9) reached at media chapter 10 [21:27:22] reader: done. 1 scr changes [21:27:23] work: average encoding speed for job is 58.528210 fps [21:27:23] comb detect: heavy 36 | light 942 | uncombed 81391 | total 82369 [21:27:23] decomb: deinterlaced 36 | blended 942 | unfiltered 81391 | total 82369 [21:27:24] vfr: 82369 frames output, 0 dropped and 0 duped for CFR/PFR [21:27:24] vfr: lost time: 0 (0 frames) [21:27:24] vfr: gained time: 0 (0 frames) (0 not accounted for) [21:27:24] stream: 82370 good frames, 0 errors (0%) [21:27:24] truehd-decoder done: 4121703 frames, 0 decoder errors [21:27:24] ac3-decoder done: 107340 frames, 0 decoder errors [21:27:24] ac3-decoder done: 107339 frames, 0 decoder errors [21:27:24] ac3-decoder done: 107339 frames, 0 decoder errors [21:27:24] ac3-decoder done: 107339 frames, 0 decoder errors [21:27:24] dca-decoder done: 321842 frames, 0 decoder errors [21:27:24] h264-decoder done: 82369 frames, 0 decoder errors [21:27:24] sync: got 82369 frames, 82392 expected [21:27:24] sync: framerate min 23.976 fps, max 23.976 fps, avg 23.976 fps x264 [info]: frame I:1042 Avg QP:14.64 size:199101 x264 [info]: frame P:22327 Avg QP:18.03 size: 98667 x264 [info]: frame B:59000 Avg QP:19.38 size: 52442 x264 [info]: consecutive B-frames: 3.7% 1.3% 3.8% 91.3% x264 [info]: mb I I16..4: 30.8% 0.0% 69.2% x264 [info]: mb P I16..4: 16.5% 0.0% 15.1% P16..4: 32.9% 21.0% 10.4% 0.0% 0.0% skip: 4.1% x264 [info]: mb B I16..4: 15.0% 0.0% 3.3% B16..8: 28.6% 13.9% 0.9% direct:27.5% skip:10.7% L0:46.7% L1:36.3% BI:17.0% x264 [info]: coded y,uvDC,uvAC intra: 70.0% 87.4% 39.6% inter: 39.7% 63.9% 13.1% x264 [info]: i16 v,h,dc,p: 28% 16% 41% 15% x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 17% 22% 6% 7% 6% 5% 5% 4% x264 [info]: i8c dc,h,v,p: 56% 17% 22% 4% x264 [info]: Weighted P-Frames: Y:4.7% UV:1.7% x264 [info]: ref P L0: 56.8% 43.2% x264 [info]: ref B L0: 73.9% 26.1% x264 [info]: ref B L1: 91.4% 8.6% x264 [info]: kb/s:12818.04 [21:27:24] mux: track 0, 82369 frames, 5504462400 bytes, 12817.79 kbps, fifo 256 [21:27:24] mux: track 1, 4121703 frames, 2055164352 bytes, 4785.69 kbps, fifo 16384 [21:27:24] mux: track 2, 107340 frames, 192353280 bytes, 447.92 kbps, fifo 512 [21:27:24] mux: track 3, 107339 frames, 192351488 bytes, 447.91 kbps, fifo 512 [21:27:24] mux: track 4, 107339 frames, 192351488 bytes, 447.91 kbps, fifo 512 [21:27:24] mux: track 5, 107339 frames, 192351488 bytes, 447.91 kbps, fifo 512 [21:27:24] mux: track 6, 321842 frames, 329566208 bytes, 767.43 kbps, fifo 2048 [21:27:24] mux: track 7, 1572 frames, 21774610 bytes, 50.70 kbps, fifo 16 [21:27:24] mux: track 8, 1466 frames, 20668094 bytes, 48.13 kbps, fifo 16 [21:27:24] mux: track 9, 1466 frames, 21095732 bytes, 49.12 kbps, fifo 16 [21:27:24] mux: track 10, 1466 frames, 21092117 bytes, 49.12 kbps, fifo 16 [21:27:24] mux: track 11, 1466 frames, 24217931 bytes, 56.39 kbps, fifo 16 [21:27:24] mux: track 12, 1572 frames, 21756158 bytes, 50.66 kbps, fifo 16 [21:27:24] mux: track 13, 1466 frames, 20957999 bytes, 48.80 kbps, fifo 16 [21:27:24] mux: track 14, 1436 frames, 17098162 bytes, 39.82 kbps, fifo 16 [21:27:24] mux: track 15, 1466 frames, 20048263 bytes, 46.68 kbps, fifo 16 [21:27:24] mux: track 16, 1466 frames, 17079441 bytes, 39.77 kbps, fifo 16 [21:27:24] mux: track 17, 1466 frames, 18804515 bytes, 43.79 kbps, fifo 16 [21:27:24] mux: track 18, 1464 frames, 20382947 bytes, 47.46 kbps, fifo 16 [21:27:24] mux: track 19, 1492 frames, 12459619 bytes, 29.01 kbps, fifo 16 [21:27:24] mux: track 20, 1212 frames, 15362836 bytes, 35.77 kbps, fifo 16 [21:27:24] mux: track 21, 1468 frames, 12743830 bytes, 29.68 kbps, fifo 16 [21:27:24] Finished work at: Mon Dec 16 21:27:24 2024 [21:27:24] libhb: work result = 0