Doom9's Forum - View Single Post - BDSup2Sub - convert and tweak bitmap subtitle streams (VobSub,BD-SUP,BDN XML,HD-SUP)

r0lZ · 10th December 2015, 10:04

Yes, the timecodes in the XML are in the form HH:MM:SS:FF, where FF is a number of frames, not a fraction of a second. There is no way to be more precise than that.

However, the timecodes displayed in the GUI, are in the form HH:MM:SS.sss, where SS.sss is a floating point. And IMO it is extremely difficult to understand what BDSup2Sub does when it converts the input frame rate to the frame rate displayed in the GUI. Usually, they do not match at all. And it's not simply a precision problem. There is obviously a bug here, but increasing the precision will not fix it.

For example, if the XML timecode is 01:27:38:11 at 23.976fps, the frame number is 5258 seconds * (24/1.001) + 11 = 126077. Converted back to a timecode, still at 23.976fps, that gives 126077 / (24/1.001) = 5258.4617 seconds = approximately 01:27:38.462. But in the GUI, the time code displayed is 01:27:43.716 !!! It is obviously completely wrong ! It seems that BDSup2Sub does ALWAYS a framerate conversion, even when that option is not enabled.

Anyway, we have to live with that terrible bug, since BDSup2Sub is not developed any more.

10th December 2015, 10:04	#1323 \| Link
r0lZ PgcEdit daemon Join Date: Jul 2003 Posts: 7,469	Yes, the timecodes in the XML are in the form HH:MM:SS:FF, where FF is a number of frames, not a fraction of a second. There is no way to be more precise than that. However, the timecodes displayed in the GUI, are in the form HH:MM:SS.sss, where SS.sss is a floating point. And IMO it is extremely difficult to understand what BDSup2Sub does when it converts the input frame rate to the frame rate displayed in the GUI. Usually, they do not match at all. And it's not simply a precision problem. There is obviously a bug here, but increasing the precision will not fix it. For example, if the XML timecode is 01:27:38:11 at 23.976fps, the frame number is 5258 seconds * (24/1.001) + 11 = 126077. Converted back to a timecode, still at 23.976fps, that gives 126077 / (24/1.001) = 5258.4617 seconds = approximately 01:27:38.462. But in the GUI, the time code displayed is 01:27:43.716 !!! It is obviously completely wrong ! It seems that BDSup2Sub does ALWAYS a framerate conversion, even when that option is not enabled. Anyway, we have to live with that terrible bug, since BDSup2Sub is not developed any more. __________________ r0lZ PgcEdit homepage (hosted by VideoHelp) BD3D2MK3D A tool to convert 3D blu-rays to SBS, T&B or FS MKV Last edited by r0lZ; 25th December 2016 at 11:36. Reason: missing dots (1001 instead of 1.001)