clip.SetClipProperty() sometimes does not work

Hi!

I'm using the following script to automatically set the timecode of my clips in DaVinci Resolve. Because the "date modified" of the clips of my Sony (A7S III, A7 IV) cameras is actually the end of the clip, I calculate the Start TC by subtracting the duration.

Code: Select all

from datetime import datetime

pm = resolve.GetProjectManager()
proj = pm.GetCurrentProject()
mp = proj.GetMediaPool()
bin = mp.GetCurrentFolder()
clips = bin.GetClipList()

for clip in clips:
    clipEnd = datetime.strptime(clip.GetClipProperty('Date Modified').split()[3], '%H:%M:%S')
    duration = datetime.strptime(clip.GetClipProperty('Duration')[0:8], '%H:%M:%S')
    clipStart = "{:0>8}".format(str(clipEnd - duration)) + ":00"

    if clip.SetClipProperty('Start TC', clipStart):
        result = '*success*'
    else:
        result = '!failed!'

    actualClipStart = clip.GetClipProperty('Start TC')
    print(result,
          clip.GetClipProperty('File Name'),
          actualClipStart,
          clipStart,
          duration.time(),
          clipEnd.time(),
          'match' if clipStart == (actualClipStart).replace(";", ":") else '!!!mismatch!!!')


This script works on almost all clips, but on a few, it doesn't and I it's replicable. Here's a sample output:

Code: Select all

*success* C0522.MP4 10:34:30:00 10:34:30:00 00:00:00 10:34:30 match
*success* C0526.MP4 18:12:46;00 18:12:46:00 00:00:05 18:12:51 match
*success* C0527.MP4 18:13:02;00 18:13:02:00 00:00:34 18:13:36 match
*success* C0525.MP4 18:11:25;00 18:11:25:00 00:00:56 18:12:21 match
*success* C0528.MP4 18:13:41;00 18:13:41:00 00:01:20 18:15:01 match
*success* C0530.MP4 18:21:19;00 18:21:19:00 00:00:06 18:21:25 match
*success* C0521.MP4 08:30:30;11 08:32:18:00 00:02:14 08:34:32 !!!mismatch!!!
*success* C0529.MP4 18:17:01;00 18:17:01:00 00:00:12 18:17:13 match
*success* C0524.MP4 17:49:31;00 17:49:31:00 00:03:07 17:52:38 match
*success* C0532.MP4 18:25:44;00 18:25:44:00 00:00:47 18:26:31 match
*success* C0531.MP4 18:24:43;00 18:24:43:00 00:00:55 18:25:38 match
*success* C0533.MP4 18:26:40;00 18:26:40:00 00:00:58 18:27:38 match
*success* C0535.MP4 18:32:51;00 18:32:51:00 00:00:11 18:33:02 match
*success* C0536.MP4 18:38:19;00 18:38:19:00 00:00:10 18:38:29 match
*success* C0537.MP4 18:40:08;00 18:40:08:00 00:00:15 18:40:23 match
*success* C0539.MP4 18:42:15;00 18:42:15:00 00:00:04 18:42:19 match
*success* C0538.MP4 18:40:37;00 18:40:37:00 00:00:33 18:41:10 match
*success* C0534.MP4 18:31:04;00 18:31:04:00 00:01:07 18:32:11 match
*success* C0543.MP4 19:54:52;00 19:54:52:00 00:00:05 19:54:57 match
*success* C0544.MP4 19:55:27;00 19:55:27:00 00:00:08 19:55:35 match
*success* C0541.MP4 19:42:03;00 19:42:03:00 00:00:53 19:42:56 match
*success* C0546.MP4 20:18:08;00 20:18:08:00 00:00:43 20:18:51 match
*success* C0548.MP4 20:20:05;00 20:20:05:00 00:00:08 20:20:13 match
*success* C0547.MP4 20:19:07;00 20:19:07:00 00:00:34 20:19:41 match
*success* C0549.MP4 20:20:22;00 20:20:22:00 00:00:13 20:20:35 match
*success* C0550.MP4 20:20:50;00 20:20:50:00 00:00:21 20:21:11 match
*success* C0552.MP4 20:22:23;00 20:22:23:00 00:00:15 20:22:38 match
*success* C0551.MP4 20:21:40;00 20:21:40:00 00:00:28 20:22:08 match
*success* C0553.MP4 20:23:30;00 20:23:30:00 00:00:19 20:23:49 match
*success* C0540.MP4 19:10:38;00 19:10:38:00 00:04:02 19:14:40 match
*success* C0555.MP4 20:34:36;00 20:34:36:00 00:00:12 20:34:48 match
*success* C0556.MP4 20:34:54;00 20:34:54:00 00:00:11 20:35:05 match
*success* C0557.MP4 20:35:12;00 20:35:12:00 00:00:30 20:35:42 match
*success* C0554.MP4 20:33:01;00 20:33:01:00 00:01:23 20:34:24 match
*success* C0558.MP4 20:36:13;00 20:36:13:00 00:00:24 20:36:37 match
*success* C0559.MP4 20:38:27;00 20:38:27:00 00:00:30 20:38:57 match
*success* C0562.MP4 21:18:23;00 21:18:23:00 00:00:09 21:18:32 match
*success* C0561.MP4 21:16:56;00 21:16:56:00 00:00:03 21:16:59 match
*success* C0545.MP4 20:10:50;00 20:10:50:00 00:06:35 20:17:25 match
*success* C0560.MP4 21:14:41;00 21:14:41:00 00:01:22 21:16:03 match
*success* C0564.MP4 21:27:36;00 21:27:36:00 00:00:05 21:27:41 match
*success* C0563.MP4 21:25:56;00 21:25:56:00 00:01:25 21:27:21 match
*success* C0565.MP4 21:28:15;00 21:28:15:00 00:00:10 21:28:25 match
*success* C0566.MP4 21:28:45;00 21:28:45:00 00:00:15 21:29:00 match
*success* C0567.MP4 21:29:29;00 21:29:29:00 00:00:29 21:29:58 match
*success* C0568.MP4 21:31:08;00 21:31:08:00 00:00:12 21:31:20 match
*success* C0569.MP4 21:33:21;00 21:33:21:00 00:00:17 21:33:38 match
*success* C0571.MP4 21:36:13;00 21:36:13:00 00:00:19 21:36:32 match
*success* C0542.MP4 19:43:06;00 19:43:06:00 00:11:37 19:54:43 match
*success* C0572.MP4 21:38:01;00 21:38:01:00 00:00:12 21:38:13 match
*success* C0574.MP4 21:44:34;00 21:44:34:00 00:00:04 21:44:38 match
*success* C0573.MP4 21:42:40;00 21:42:40:00 00:00:36 21:43:16 match
*success* C0570.MP4 21:34:08;00 21:34:08:00 00:00:44 21:34:52 match
*success* C0575.MP4 21:46:06;00 21:46:06:00 00:00:21 21:46:27 match
*success* C0576.MP4 21:47:54;00 21:47:54:00 00:00:20 21:48:14 match
*success* C0580.MP4 22:06:10;00 22:06:10:00 00:00:06 22:06:16 match
*success* C0578.MP4 21:54:39;00 21:54:39:00 00:00:10 21:54:49 match
*success* C0577.MP4 21:53:44;00 21:53:44:00 00:00:21 21:54:05 match
*success* C0581.MP4 22:06:38;00 22:06:38:00 00:00:07 22:06:45 match
*success* C0582.MP4 22:12:55;00 22:12:55:00 00:00:11 22:13:06 match
*success* C0579.MP4 22:05:00;04 22:05:00:00 00:00:32 22:05:32 !!!mismatch!!!
*success* C0583.MP4 22:15:16;00 22:15:16:00 00:00:03 22:15:19 match
*success* C0585.MP4 22:18:00;04 22:18:00:00 00:00:08 22:18:08 !!!mismatch!!!
*success* C0584.MP4 22:16:07;00 22:16:07:00 00:00:04 22:16:11 match
*success* C0586.MP4 22:18:23;00 22:18:23:00 00:00:21 22:18:44 match
*success* C0588.MP4 22:22:12;00 22:22:12:00 00:00:25 22:22:37 match
*success* C0590.MP4 22:32:24;00 22:32:24:00 00:00:06 22:32:30 match
*success* C0587.MP4 22:19:13;00 22:19:13:00 00:00:52 22:20:05 match
*success* C0589.MP4 22:30:29;00 22:30:29:00 00:01:05 22:31:34 match
*success* C0592.MP4 22:42:51;00 22:42:51:00 00:00:07 22:42:58 match
*success* C0591.MP4 22:38:41;00 22:38:41:00 00:00:26 22:39:07 match
*success* C0593.MP4 22:43:28;00 22:43:28:00 00:00:15 22:43:43 match
*success* C0594.MP4 22:45:08;00 22:45:08:00 00:00:23 22:45:31 match
*success* C0523.MP4 13:05:05:00 13:05:05:00 01:17:06 14:22:11 match


As you can see, on clip C0521.MP4 as an example the actual value for Start TC is 08:30:30;11, although I set it to 08:32:18:00 using clip.SetClipProperty().

I can't even set it correctly by using the UI. I added a screenshot as an attachment, where you can see, that the value in the list differs from the value in the Clip Attributes.

Screenshot 2023-01-30 200748.png (116.67 KiB) Viewed 264 times

What's the matter and how can I fix it?

Thank you so much in advance!

Can you try the same test on non-MP4 files and see if it fails?