Another test: I've aligned the MLV header at 512 bytes.
5D3, 1920x1080, 30 fps, global draw on. 32M-MLV.MO is the one from reply #42 (30bb06a), and HDR512.MO is the one with header aligned at 512 bytes (b658401).
Filtered log, with grep -E "(Recorded|version)":
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
Recorded frames : 632,475,772,726,659,702,642,754
Raw_rec version : ML/MODULES/RAW_REC/HDR512.MO
Recorded frames : 793,1019,976,944,1114,1017,714,577
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
Recorded frames : 688,724,559,786,863,786,785,867
Raw_rec version : ML/MODULES/RAW_REC/HDR512.MO
Recorded frames : 1032,1053,927,1139,939,1055,754,659
Raw_rec version : ML/MODULES/RAW_REC/HDR512.MO
Recorded frames : 689,890,921,802,1101,1049,918,1133
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
Recorded frames : 422,721,762,778,879,869,706,868
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
Recorded frames : 797,780,847,679,577,847,768,799
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
Recorded frames : 629,793,770,754,751,845,783,835
Full log:
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:15:20
===============================================================================
[12:15:25] Recording test clip 1 of 8...
[12:15:51] Recording stopped.
[12:16:11] Recording test clip 2 of 8...
[12:16:32] Recording stopped.
[12:16:52] Recording test clip 3 of 8...
[12:17:23] Recording stopped.
[12:17:43] Recording test clip 4 of 8...
[12:18:14] Recording stopped.
[12:18:34] Recording test clip 5 of 8...
[12:19:05] Recording stopped.
[12:19:25] Recording test clip 6 of 8...
[12:19:56] Recording stopped.
[12:20:16] Recording test clip 7 of 8...
[12:20:42] Recording stopped.
[12:21:02] Recording test clip 8 of 8...
[12:21:32] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:23:29
===============================================================================
A:/DCIM/100EOS5D/M20-1215.MLV: 632 frames, 2.136047 GB
A:/DCIM/100EOS5D/M20-1216.MLV: 475 frames, 1.605415 GB
A:/DCIM/100EOS5D/M20-1217.MLV: 772 frames, 2.609222 GB
A:/DCIM/100EOS5D/M20-1218.MLV: 726 frames, 2.453751 GB
A:/DCIM/100EOS5D/M20-1219.MLV: 659 frames, 2.227303 GB
A:/DCIM/100EOS5D/M20-1220.MLV: 702 frames, 2.372635 GB
A:/DCIM/100EOS5D/M20-1221.MLV: 642 frames, 2.169846 GB
A:/DCIM/100EOS5D/M20-1222.MLV: 754 frames, 2.548386 GB
Recorded frames : 632,475,772,726,659,702,642,754
Quartile summary: 680.5 frames (637...740)
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/HDR512.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:25:14
===============================================================================
[12:25:19] Recording test clip 1 of 8...
[12:25:50] Recording stopped.
[12:26:10] Recording test clip 2 of 8...
[12:26:51] Recording stopped.
[12:27:11] Recording test clip 3 of 8...
[12:27:52] Recording stopped.
[12:28:12] Recording test clip 4 of 8...
[12:28:48] Recording stopped.
[12:29:08] Recording test clip 5 of 8...
[12:29:53] Recording stopped.
[12:30:14] Recording test clip 6 of 8...
[12:30:54] Recording stopped.
[12:31:14] Recording test clip 7 of 8...
[12:31:45] Recording stopped.
[12:32:05] Recording test clip 8 of 8...
[12:32:31] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:34:28
===============================================================================
A:/DCIM/100EOS5D/M20-1225.MLV: 793 frames, 2.680199 GB
A:/DCIM/100EOS5D/M20-1226.MLV: 1019 frames, 3.444039 GB
A:/DCIM/100EOS5D/M20-1227.MLV: 976 frames, 3.298707 GB
A:/DCIM/100EOS5D/M20-1228.MLV: 944 frames, 3.190552 GB
A:/DCIM/100EOS5D/M20-1229.MLV: 1114 frames, 3.765122 GB
A:/DCIM/100EOS5D/M20-1230.MLV: 1017 frames, 3.437279 GB
A:/DCIM/100EOS5D/M20-1231.MLV: 714 frames, 2.413193 GB
A:/DCIM/100EOS5D/M20-1232.MLV: 577 frames, 1.950158 GB
Recorded frames : 793,1019,976,944,1114,1017,714,577
Quartile summary: 960 frames (753.5...1018)
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:36:12
===============================================================================
[12:36:17] Recording test clip 1 of 8...
[12:36:48] Recording stopped.
[12:37:08] Recording test clip 2 of 8...
[12:37:39] Recording stopped.
[12:37:59] Recording test clip 3 of 8...
[12:38:25] Recording stopped.
[12:38:45] Recording test clip 4 of 8...
[12:39:16] Recording stopped.
[12:39:36] Recording test clip 5 of 8...
[12:40:11] Recording stopped.
[12:40:32] Recording test clip 6 of 8...
[12:41:02] Recording stopped.
[12:41:23] Recording test clip 7 of 8...
[12:41:54] Recording stopped.
[12:42:14] Recording test clip 8 of 8...
[12:42:49] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:44:46
===============================================================================
A:/DCIM/100EOS5D/M20-1236.MLV: 688 frames, 2.325317 GB
A:/DCIM/100EOS5D/M20-1237.MLV: 724 frames, 2.446991 GB
A:/DCIM/100EOS5D/M20-1238.MLV: 559 frames, 1.88932 GB
A:/DCIM/100EOS5D/M20-1239.MLV: 786 frames, 2.65654 GB
A:/DCIM/100EOS5D/M20-1240.MLV: 863 frames, 2.916786 GB
A:/DCIM/100EOS5D/M20-1241.MLV: 786 frames, 2.65654 GB
A:/DCIM/100EOS5D/M20-1242.MLV: 785 frames, 2.65316 GB
A:/DCIM/100EOS5D/M20-1243.MLV: 867 frames, 2.930305 GB
Recorded frames : 688,724,559,786,863,786,785,867
Quartile summary: 785.5 frames (706...824.5)
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/HDR512.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:46:32
===============================================================================
[12:46:38] Recording test clip 1 of 8...
[12:47:19] Recording stopped.
[12:47:39] Recording test clip 2 of 8...
[12:48:19] Recording stopped.
[12:48:40] Recording test clip 3 of 8...
[12:49:15] Recording stopped.
[12:49:35] Recording test clip 4 of 8...
[12:50:21] Recording stopped.
[12:50:41] Recording test clip 5 of 8...
[12:51:17] Recording stopped.
[12:51:37] Recording test clip 6 of 8...
[12:52:18] Recording stopped.
[12:52:38] Recording test clip 7 of 8...
[12:53:09] Recording stopped.
[12:53:29] Recording test clip 8 of 8...
[12:54:00] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:55:56
===============================================================================
A:/DCIM/100EOS5D/M20-1246.MLV: 1032 frames, 3.487977 GB
A:/DCIM/100EOS5D/M20-1247.MLV: 1053 frames, 3.558953 GB
A:/DCIM/100EOS5D/M20-1248.MLV: 927 frames, 3.133095 GB
A:/DCIM/100EOS5D/M20-1249.MLV: 1139 frames, 3.849617 GB
A:/DCIM/100EOS5D/M20-1250.MLV: 939 frames, 3.173653 GB
A:/DCIM/100EOS5D/M20-1251.MLV: 1055 frames, 3.565712 GB
A:/DCIM/100EOS5D/M20-1252.MLV: 754 frames, 2.548386 GB
A:/DCIM/100EOS5D/M20-1253.MLV: 659 frames, 2.227303 GB
Recorded frames : 1032,1053,927,1139,939,1055,754,659
Quartile summary: 985.5 frames (840.5...1054)
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/HDR512.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 12:57:41
===============================================================================
[12:57:46] Recording test clip 1 of 8...
[12:58:17] Recording stopped.
[12:58:37] Recording test clip 2 of 8...
[12:59:13] Recording stopped.
[12:59:33] Recording test clip 3 of 8...
[13:00:09] Recording stopped.
[13:00:29] Recording test clip 4 of 8...
[13:01:05] Recording stopped.
[13:01:25] Recording test clip 5 of 8...
[13:02:10] Recording stopped.
[13:02:30] Recording test clip 6 of 8...
[13:03:11] Recording stopped.
[13:03:31] Recording test clip 7 of 8...
[13:04:07] Recording stopped.
[13:04:27] Recording test clip 8 of 8...
[13:05:13] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 13:07:10
===============================================================================
A:/DCIM/100EOS5D/M20-1257.MLV: 689 frames, 2.328698 GB
A:/DCIM/100EOS5D/M20-1258.MLV: 890 frames, 3.008042 GB
A:/DCIM/100EOS5D/M20-1259.MLV: 921 frames, 3.112816 GB
A:/DCIM/100EOS5D/M20-1300.MLV: 802 frames, 2.710618 GB
A:/DCIM/100EOS5D/M20-1301.MLV: 1101 frames, 3.721184 GB
A:/DCIM/100EOS5D/M20-1302.MLV: 1049 frames, 3.545433 GB
A:/DCIM/100EOS5D/M20-1303.MLV: 918 frames, 3.102677 GB
A:/DCIM/100EOS5D/M20-1304.MLV: 1133 frames, 3.829339 GB
Recorded frames : 689,890,921,802,1101,1049,918,1133
Quartile summary: 919.5 frames (846...1075)
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 13:08:54
===============================================================================
[13:08:59] Recording test clip 1 of 8...
[13:09:20] Recording stopped.
[13:09:40] Recording test clip 2 of 8...
[13:10:11] Recording stopped.
[13:10:31] Recording test clip 3 of 8...
[13:11:02] Recording stopped.
[13:11:22] Recording test clip 4 of 8...
[13:11:53] Recording stopped.
[13:12:13] Recording test clip 5 of 8...
[13:12:49] Recording stopped.
[13:13:09] Recording test clip 6 of 8...
[13:13:45] Recording stopped.
[13:14:05] Recording test clip 7 of 8...
[13:14:36] Recording stopped.
[13:14:56] Recording test clip 8 of 8...
[13:15:32] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 13:17:28
===============================================================================
A:/DCIM/100EOS5D/M20-1309.MLV: 422 frames, 1.426285 GB
A:/DCIM/100EOS5D/M20-1310.MLV: 721 frames, 2.436851 GB
A:/DCIM/100EOS5D/M20-1311.MLV: 762 frames, 2.575424 GB
A:/DCIM/100EOS5D/M20-1312.MLV: 778 frames, 2.629501 GB
A:/DCIM/100EOS5D/M20-1313.MLV: 879 frames, 2.970863 GB
A:/DCIM/100EOS5D/M20-1314.MLV: 869 frames, 2.937065 GB
A:/DCIM/100EOS5D/M20-1315.MLV: 706 frames, 2.386154 GB
A:/DCIM/100EOS5D/M20-1316.MLV: 868 frames, 2.933685 GB
Recorded frames : 422,721,762,778,879,869,706,868
Quartile summary: 770 frames (713.5...868.5)
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 13:19:15
===============================================================================
[13:19:20] Recording test clip 1 of 8...
[13:19:51] Recording stopped.
[13:20:11] Recording test clip 2 of 8...
[13:20:42] Recording stopped.
[13:21:02] Recording test clip 3 of 8...
[13:21:38] Recording stopped.
[13:21:58] Recording test clip 4 of 8...
[13:22:29] Recording stopped.
[13:22:49] Recording test clip 5 of 8...
[13:23:15] Recording stopped.
[13:23:35] Recording test clip 6 of 8...
[13:24:11] Recording stopped.
[13:24:31] Recording test clip 7 of 8...
[13:25:02] Recording stopped.
[13:25:22] Recording test clip 8 of 8...
[13:25:53] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 13:27:49
===============================================================================
A:/DCIM/100EOS5D/M20-1319.MLV: 797 frames, 2.693718 GB
A:/DCIM/100EOS5D/M20-1320.MLV: 780 frames, 2.636261 GB
A:/DCIM/100EOS5D/M20-1321.MLV: 847 frames, 2.862709 GB
A:/DCIM/100EOS5D/M20-1322.MLV: 679 frames, 2.294899 GB
A:/DCIM/100EOS5D/M20-1323.MLV: 577 frames, 1.950157 GB
A:/DCIM/100EOS5D/M20-1324.MLV: 847 frames, 2.862709 GB
A:/DCIM/100EOS5D/M20-1325.MLV: 768 frames, 2.595703 GB
A:/DCIM/100EOS5D/M20-1326.MLV: 799 frames, 2.700478 GB
Recorded frames : 797,780,847,679,577,847,768,799
Quartile summary: 788.5 frames (723.5...823)
For next experiment
===================
Raw_rec version : ML/MODULES/RAW_REC/32M-MLV.MO
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 13:29:36
===============================================================================
[13:29:41] Recording test clip 1 of 8...
[13:30:07] Recording stopped.
[13:30:27] Recording test clip 2 of 8...
[13:30:58] Recording stopped.
[13:31:18] Recording test clip 3 of 8...
[13:31:49] Recording stopped.
[13:32:09] Recording test clip 4 of 8...
[13:32:40] Recording stopped.
[13:33:00] Recording test clip 5 of 8...
[13:33:31] Recording stopped.
[13:33:51] Recording test clip 6 of 8...
[13:34:27] Recording stopped.
[13:34:47] Recording test clip 7 of 8...
[13:35:18] Recording stopped.
[13:35:38] Recording test clip 8 of 8...
[13:36:14] Recording stopped.
===============================================================================
ML/SCRIPTS/RAWBENCH.LUA - 2016-4-20 13:38:10
===============================================================================
A:/DCIM/100EOS5D/M20-1329.MLV: 629 frames, 2.125908 GB
A:/DCIM/100EOS5D/M20-1330.MLV: 793 frames, 2.680199 GB
A:/DCIM/100EOS5D/M20-1331.MLV: 770 frames, 2.602463 GB
A:/DCIM/100EOS5D/M20-1332.MLV: 754 frames, 2.548386 GB
A:/DCIM/100EOS5D/M20-1333.MLV: 751 frames, 2.538246 GB
A:/DCIM/100EOS5D/M20-1334.MLV: 845 frames, 2.855949 GB
A:/DCIM/100EOS5D/M20-1335.MLV: 783 frames, 2.6464 GB
A:/DCIM/100EOS5D/M20-1336.MLV: 835 frames, 2.822151 GB
Recorded frames : 629,793,770,754,751,845,783,835
Quartile summary: 776.5 frames (752.5...814)