View Bug Details

IDProjectCategoryView StatusLast Update
0000601DCP-o-matic[All Projects] Bugspublic2017-04-21 09:53
ReportercarlAssigned To 
Status acknowledgedResolutionopen 
Product Version 
Target VersionFixed in Version 
Summary0000601: Write bitmap subtitles as PNG to Interop/SMPTE streams


TagsNo tags attached.
Estimated work requiredAverage


related to 0000606 closedcarl Warn if non-burnt-in subs will not work 



2015-06-19 19:27

administrator   ~0000699

This is a fairly significant amount of work, as it means libdcp has to move to a writer-style API for writing subs as well as images and sound. Currently it stores text subtitles in memory and writes them all out at the end, but this isn't possible for bitmaps.

It's not clear how much demand there is for this feature, or how well projection system is tested with image rather than text subs.


2016-07-06 19:01

administrator   ~0001345

It seems that this feature is quite widely used for subs that come in as text to work around unreliability in rendering.


2016-07-07 23:37

administrator   ~0001348

For SMPTE I think this is just reading/writing the PNGs from the ResourceList (like how fonts are read/written already). For Interop I'm not sure.

Bug History

Date Modified Username Field Change
2015-06-12 18:37 carl New Bug
2015-06-15 19:58 carl Relationship added related to 0000606
2015-06-19 19:27 carl Note Added: 0000699
2015-09-01 22:21 carl Priority normal => low
2015-09-01 22:21 carl Status new => acknowledged
2016-07-06 19:01 carl Note Added: 0001345
2016-07-06 19:01 carl Target Version => 2.10.0
2016-07-07 23:37 carl Note Added: 0001348
2016-09-28 09:44 carl Target Version 2.10.0 => 2.11.0
2017-04-21 09:53 carl Target Version 2.11.0 =>