Dwarf Fortress Bug Tracker - Dwarf Fortress
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IDProjectCategoryView StatusDate SubmittedLast Update
0008373Dwarf FortressMovies -- Playbackpublic2014-09-28 15:302016-01-02 16:36
ReporterBenLubar 
Assigned Tolethosor 
PrioritynormalSeverityminorReproducibilityalways
StatusconfirmedResolutionopen 
Platformx86_64OSWindowsOS Version8.1
Product Version0.40.13 
Target VersionFixed in Version 
Summary0008373: large cmv flashes black-on-red @ for large areas of the screen
DescriptionThis is probably easiest to explain visually:

dwarf fortress output (recorded from screen): http://youtu.be/IGxq3ZUqHD8 [^]
expected output (encoded directly from cmv data): http://youtu.be/wux1pZH4WJE [^]
Steps To Reproduce1. download this file and place it in the data/movies folder: https://docs.google.com/file/d/0B5-zDODl1jqDcTNKNERCWloxWGc/edit [^]
2. Type ;l
3. select the file you just downloaded
4. Type p
Additional Information
TagsNo tags attached.
Relationships
related to 0003654new  Movies recorded in SDL version flash during playback 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2014-09-28 15:30BenLubarNew Issue
2014-09-28 15:32BenLubarIssue Monitored: BenLubar
2014-09-28 15:45BenLubarNote Added: 0030433
2014-09-28 17:51QuietustNote Added: 0030435
2014-09-28 18:23QuietustNote Edited: 0030435bug_revision_view_page.php?bugnote_id=0030435#r11895
2014-09-28 18:23QuietustNote Edited: 0030435bug_revision_view_page.php?bugnote_id=0030435#r11896
2014-09-28 22:36BenLubarNote Added: 0030442
2014-09-29 06:47FootkerchiefRelationship addedrelated to 0003654
2014-12-21 12:35BenLubarNote Added: 0031415
2014-12-25 18:19lethosorNote Added: 0031475
2014-12-25 18:19lethosorAssigned To => lethosor
2014-12-25 18:19lethosorStatusnew => confirmed
2015-12-28 18:33BenLubarNote Added: 0034247
2015-12-28 18:48BenLubarNote Edited: 0034247bug_revision_view_page.php?bugnote_id=0034247#r13809
2015-12-28 20:11BenLubarNote Added: 0034250
2016-01-02 16:36BenLubarNote Added: 0034277

Notes
(0030433)
BenLubar   
2014-09-28 15:45   
Observation:

@ is CP437 0x40
red is the 4th color in Dwarf Fortress (ignoring intensities)
black is the 0th color in Dwarf Fortress

There's probably some uninitialized data being read somewhere.
(0030435)
Quietust   
2014-09-28 17:51   
(edited on: 2014-09-28 18:23)
If you single-step through the movie, the frames with black-on-red-@ are all misaligned, drawing from some point in the middle of the screen and corrupting anything that would've been off the right edge (and with everything past the bottom edge shifted to the left). The bug described in 0003654 sounds similar to this.
(0030442)
BenLubar   
2014-09-28 22:36   
I wonder if it has to do with how the file is compressed...

The file (and also pretty much every other Dwarf Fortress file) is compressed in chunks, with each chunk's uncompressed size being more or less constant. Maybe all the broken frames go over chunk boundaries.
(0031415)
BenLubar   
2014-12-21 12:35   
screen capture of dwarf fortress: https://www.youtube.com/watch?v=fBVATWnlw1Y [^]
external encoder using the same cmv file: https://www.youtube.com/watch?v=c5CUZhpRryA [^]
(0031475)
lethosor   
2014-12-25 18:19   
You mentioned that this occurs with "large" movies in the title - does it occur with 80x25 movies at all? Have you noticed a minimum resolution where this occurs?
(0034247)
BenLubar   
2015-12-28 18:33   
(edited on: 2015-12-28 18:48)
Okay, it seems I deleted the original repro when I was cleaning out some old stuff, so here's a new repro:

http://dffd.bay12games.com/file.php?id=6190 [^]

Pick any of the three files. They're all 91x34 and they all exibit the same behavior.

I've modified a UI experiment I was working on to play those CMVs and output a recording to last_record.cmv: http://dffd.bay12games.com/file.php?id=11574 [^]

The UI experiment can demonstrate that the CMV files are not corrupted.
(0034250)
BenLubar   
2015-12-28 20:11   
Ok, looks like the third CMV file is actually corrupt, possibly from the screen size changing while it was recording, but I'm not sure. The first two are fine, though.
(0034277)
BenLubar   
2016-01-02 16:36   
Here's a fixed version of the third CMV: http://dffd.bay12games.com/file.php?id=11577 [^] (it was indeed corrupted by screen size changing)