[Android Software/Hacking General [Developers Only]] CXZa:
Seems to do the splitting fine. Below is the the log. The times are for just splitting

using my really old PC. Partitions still must be unpacked and some of them joined too.

The batch script does them but I still have to create some sort of menu into it...

14:23:10,22 PrimaryGPT gpt_main0.bin_0
14:23:12,70 persist persist.img_15368
14:23:15,22 ftm ftm.img_23816
14:23:17,68 vendor_a vendor_1.img_91784
14:23:20,38 vendor_a vendor_2.img_92371
14:23:23,22 vendor_a vendor_3.img_124658
14:23:26,58 vendor_a vendor_4.img_125139
14:23:29,86 vendor_a vendor_5.img_157801
14:23:34,23 vendor_a vendor_6.img_190194
14:23:37,73 vendor_a vendor_7.img_190675
14:23:40,98 vendor_a vendor_8.img_223337
14:23:44,89 vendor_a vendor_9.img_255730
14:23:48,04 vendor_a vendor_10.img_256211
14:23:51,11 vendor_a vendor_11.img_288873
14:23:53,99 vendor_a vendor_12.img_321266
14:23:56,66 vendor_a vendor_13.img_321747
14:23:59,50 vendor_a vendor_14.img_354409
14:24:02,28 vendor_a vendor_15.img_386696
14:24:04,99 vendor_a vendor_16.img_386802
14:24:07,78 vendor_a vendor_17.img_517768
14:24:10,42 vendor_a vendor_18.img_520096
14:24:13,19 vendor_a vendor_19.img_526983
14:24:15,58 vendor_b factory_cache.img_526984
14:24:18,10 system_a system_1.img_962184
14:24:20,71 system_a system_2.img_962951
14:24:23,58 system_a system_3.img_995208
14:24:26,21 system_a system_4.img_995719
14:24:29,26 system_a system_5.img_1028231
14:24:32,19 system_a system_6.img_1060744
14:24:34,93 system_a system_7.img_1061255
14:24:37,71 system_a system_8.img_1093767
14:24:40,59 system_a system_9.img_1126280
14:24:43,42 system_a system_10.img_1126791
14:24:46,69 system_a system_11.img_1159303
14:24:49,87 system_a system_12.img_1191816
14:24:52,95 system_a system_13.img_1192327
14:24:55,85 system_a system_14.img_1224839
14:24:58,70 system_a system_15.img_1257352
14:25:01,58 system_a system_16.img_1257863
14:25:04,59 system_a system_17.img_1290375
14:25:07,46 system_a system_18.img_1323143
14:25:10,35 system_a system_19.img_1355911
14:25:13,20 system_a system_20.img_1388679
14:25:16,12 system_a system_21.img_1421447
14:25:19,11 system_a system_22.img_1454215
14:25:21,93 system_a system_23.img_1486983
14:25:24,84 system_a system_24.img_1519751
14:25:28,26 system_a system_25.img_1552519
14:25:31,68 system_a system_26.img_1585287
14:25:34,66 system_a system_27.img_1618055
14:25:37,58 system_a system_28.img_1650823
14:25:40,66 system_a system_29.img_1781384
14:25:43,39 system_a system_30.img_1781640
14:25:46,32 system_a system_31.img_1846920
14:25:49,13 system_a system_32.img_1847176
14:25:52,18 system_a system_33.img_1977992
14:25:54,98 system_a system_34.img_2004272
14:25:57,98 system_a system_35.img_2020999
14:26:00,65 system_b system_other_OPEN_KR_0.img_2021000
14:26:03,55 system_b system_other_OPEN_KR_767.img_2021767
14:26:06,70 system_b system_other_OPEN_KR_33024.img_2054024
14:26:09,65 system_b system_other_OPEN_KR_33535.img_2054535
14:26:12,65 system_b system_other_OPEN_KR_66047.img_2087047
14:26:15,65 system_b system_other_OPEN_KR_98560.img_2119560
14:26:18,60 system_b system_other_OPEN_KR_99071.img_2120071
14:26:21,63 system_b system_other_OPEN_KR_131583.img_2152583
14:26:24,66 system_b system_other_OPEN_KR_163840.img_2184840
14:26:27,50 system_b system_other_OPEN_KR_164096.img_2185096
14:26:30,40 system_b system_other_OPEN_KR_229376.img_2250376
14:26:33,30 system_b system_other_OPEN_KR_229632.img_2250632
14:26:36,25 system_b system_other_OPEN_KR_294912.img_2315912
14:26:39,09 system_b system_other_OPEN_KR_295168.img_2316168
14:26:42,15 system_b system_other_OPEN_KR_819200.img_2840200
14:26:45,08 system_b system_other_OPEN_KR_819456.img_2840456
14:26:48,56 system_b system_other_OPEN_KR_884736.img_2905736
14:26:52,95 system_b system_other_OPEN_KR_884992.img_2905992
14:26:57,20 system_b system_other_OPEN_KR_1015808.img_3036808
14:27:00,18 system_b system_other_OPEN_KR_1042088.img_3063088
14:27:03,31 system_b system_other_OPEN_KR_1058815.img_3079815
14:27:06,24 product_a product_1.img_3079816
14:27:09,55 product_a product_2.img_3080449
14:27:12,89 product_a product_3.img_3112711
14:27:15,96 product_a product_4.img_3113217
14:27:19,17 product_a product_5.img_3145858
14:27:22,57 product_a product_6.img_3178247
14:27:25,60 product_a product_7.img_3178753
14:27:28,76 product_a product_8.img_3211394
14:27:33,40 product_a product_9.img_3243783
14:27:36,88 product_a product_10.img_3244289
14:27:40,35 product_a product_11.img_3276930
14:27:44,01 product_a product_12.img_3309319
14:27:47,43 product_a product_13.img_3309825
14:27:51,45 product_a product_14.img_3342466
14:27:55,49 product_a product_15.img_3374855
14:28:00,04 product_a product_16.img_3375361
14:28:03,82 product_a product_17.img_3408002
14:28:07,84 product_a product_18.img_3440770
14:28:11,34 product_a product_19.img_3571336
14:28:15,17 product_a product_20.img_3595811
14:28:18,50 product_a product_21.img_3604103
14:28:21,77 OP_S OP_OPEN_KR.img_4128392
14:28:24,89 OP_S OP_OPEN_KR.img_4193928
14:28:28,30 OP_S OP_OPEN_KR.img_4259464
14:28:31,62 userdata userdata_1.img_5439240
14:28:35,16 userdata userdata_2.img_5439883
14:28:38,34 userdata userdata_3.img_5472008
14:28:42,31 userdata userdata_4.img_5472137
14:28:45,93 userdata userdata_5.img_5537544
14:28:49,29 userdata userdata_6.img_5537673
14:28:52,36 userdata userdata_7.img_5603080
14:28:55,51 userdata userdata_8.img_5603209
14:28:58,70 userdata userdata_9.img_5668616
14:29:03,47 userdata userdata_10.img_5668745
14:29:07,36 userdata userdata_11.img_5701384
14:29:10,90 userdata userdata_12.img_5701898
14:29:14,08 userdata userdata_13.img_5734152
14:29:17,41 userdata userdata_14.img_5734281
14:29:20,76 userdata userdata_15.img_5930760
14:29:24,08 BackupGPT gpt_backup0.bin_7103483
14:29:27,12 PrimaryGPT gpt_main1.bin_0
14:29:30,22 xbl_a xbl.elf_6
14:29:33,12 xbl_config_a xbl_config.elf_902
14:29:36,15 BackupGPT gpt_backup1.bin_2043
14:29:39,05 PrimaryGPT gpt_main2.bin_0
14:29:42,21 xbl_b xbl.elf_6
14:29:45,19 xbl_config_b xbl_config.elf_902
14:29:48,51 BackupGPT gpt_backup2.bin_2043
14:29:51,97 PrimaryGPT gpt_main3.bin_0
14:29:55,19 mdmddr mdmddr.mbn_320
14:29:58,92 BackupGPT gpt_backup3.bin_2043
14:30:02,52 PrimaryGPT gpt_main4.bin_0
14:30:06,35 aop_a aop.mbn_6
14:30:10,54 tz_a tz.mbn_134
14:30:13,78 hyp_a hyp.mbn_1158
14:30:36,33 modem_a NON-HLOS.bin_1290
14:30:39,40 abl_a abl.elf_101642
14:30:45,85 dsp_a dspso.bin_101898
14:30:48,96 keymaster_a km4.mbn_118282
14:30:52,06 akmu_a akmu.mbn_118410
14:31:00,29 boot_a boot.img_118538
14:31:03,33 cmnlib_a cmnlib.mbn_143114
14:31:06,42 cmnlib64_a cmnlib64.mbn_143242
14:31:09,68 devcfg_a devcfg.mbn_143370
14:31:12,79 qupfw_a qupv3fw.elf_143402
14:31:18,81 laf_a laf.img_143422
14:31:21,91 vbmeta_a vbmeta_OPEN_KR.img_155710
14:31:25,53 dtbo_a dtbo.img_155726
14:31:28,72 uefisecapp_a uefi_sec.mbn_161870
14:31:31,99 imagefv_a imagefv.elf_162382
14:31:35,44 raw_resources_a raw_resources.img_162894
14:31:38,51 sid_a imeiprot.mbn_208462
14:31:41,50 aop_b aop.mbn_208590
14:31:44,88 tz_b tz.mbn_208718
14:31:48,11 hyp_b hyp.mbn_209742
14:32:09,53 modem_b NON-HLOS.bin_209874
14:32:12,82 abl_b abl.elf_310226
14:32:19,19 dsp_b dspso.bin_310482
14:32:22,42 keymaster_b km4.mbn_326866
14:32:25,72 akmu_b akmu.mbn_326994
14:32:34,38 boot_b boot.img_327122
14:32:37,65 cmnlib_b cmnlib.mbn_351698
14:32:41,04 cmnlib64_b cmnlib64.mbn_351826
14:32:44,40 devcfg_b devcfg.mbn_351954
14:32:47,64 qupfw_b qupv3fw.elf_351986
14:32:53,77 laf_b laf.img_352006
14:32:57,36 vbmeta_b vbmeta_OPEN_KR.img_364294
14:33:01,42 dtbo_b dtbo.img_364310
14:33:04,76 uefisecapp_b uefi_sec.mbn_370454
14:33:08,12 imagefv_b imagefv.elf_370966
14:33:11,74 raw_resources_b raw_resources.img_371478
14:33:15,13 sid_b imeiprot.mbn_417046
14:33:18,44 secdata sec.elf_417174
14:33:21,87 apdp apdp.mbn_417438
14:33:25,19 msadp msadp.mbn_417502
14:33:28,48 logfs logfs_ufs_8mb.bin_428227
14:33:32,47 storsec storsec.mbn_447171
14:33:36,05 multiimgoem multi_image.mbn_447203
14:33:39,37 BackupGPT gpt_backup4.bin_452603
14:33:42,93 PrimaryGPT gpt_main5.bin_0
14:33:46,90 BackupGPT gpt_backup5.bin_3067
14:33:50,36 PrimaryGPT gpt_main6.bin_0
14:33:54,05 BackupGPT gpt_backup6.bin_1019