[FFmpeg-trac] #1098(undetermined:open): ass subtitle are stretched
FFmpeg
trac at avcodec.org
Mon Mar 19 14:19:16 CET 2012
#1098: ass subtitle are stretched
-------------------------------------+-------------------------------------
Reporter: fate | Owner:
Type: defect | Status: open
Priority: normal | Component:
Version: git-master | undetermined
Keywords: ass | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 1 | Reproduced by developer: 1
-------------------------------------+-------------------------------------
Changes (by saste):
* analyzed: 0 => 1
* status: new => open
* reproduced: 0 => 1
Comment:
Confirm the problem:
{{{
ffplay -vf ass=/home/stefano/s/Rocket_04.ass -f lavfi testsrc=s=720x480
}}}
The problem depends on the fact that vf_ass.c uses the same DAR of input
for rendering the subtitles, which is indeed a rather arbitrary behavior
(see line in vf_ass.c: ass_set_aspect_ratio(ass->renderer, dar, sar)).
Possible fixes:
set the DAR to 1.0, or allow the user to specify the DAR through an
option.
In the second case I ask: does it make sense to be able to set such value,
or should be rather set in the ass file itself (assuming it is possible)?
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1098#comment:7>
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