#11566(ffmpeg:new): Arabic subtitles rendering artifact BUG
#11566: Arabic subtitles rendering artifact BUG -----------------------------------+-------------------------------------- Reporter: ellat | Type: defect Status: new | Priority: normal Component: ffmpeg | Version: git-master Keywords: subtitles | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -----------------------------------+-------------------------------------- Summary of the bug: How to reproduce: Create the file a.srt: {{{ 1 00:00:00,000 --> 00:00:15,000 الأسد }}} Use a random input video and run this command to burn subtitles: `%./ffmpeg -i input_video.mp4 -vf subtitles=a.srt:force_style='FontName=Arial' out.mp4` A box outline will appear in the middle of the arabic word. {{{ ffmpeg version N-119396-g48c0dba23b-20250430 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 14.2.0 (crosstool-NG 1.27.0.18_7458341) }}} According to: https://bugs.kde.org/show_bug.cgi?id=502725 this issue has existed for 2 years. -- Ticket URL: <https://trac.ffmpeg.org/ticket/11566> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker
#11566: Arabic subtitles rendering artifact BUG ------------------------------------+---------------------------------- Reporter: ellat | Owner: (none) Type: defect | Status: new Priority: normal | Component: ffmpeg Version: git-master | Resolution: Keywords: subtitles | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ------------------------------------+---------------------------------- Description changed by ellat: Old description:
Summary of the bug: How to reproduce: Create the file a.srt:
{{{ 1 00:00:00,000 --> 00:00:15,000 الأسد }}}
Use a random input video and run this command to burn subtitles:
`%./ffmpeg -i input_video.mp4 -vf subtitles=a.srt:force_style='FontName=Arial' out.mp4`
A box outline will appear in the middle of the arabic word.
{{{ ffmpeg version N-119396-g48c0dba23b-20250430 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 14.2.0 (crosstool-NG 1.27.0.18_7458341) }}}
According to: https://bugs.kde.org/show_bug.cgi?id=502725 this issue has existed for 2 years.
New description: Summary of the bug: How to reproduce: Create the file `sub.srt`: {{{ 1 00:00:00,000 --> 00:00:15,000 الأسد }}} Use a random input video and run this command to burn subtitles: `%./ffmpeg -i input_video.mp4 -vf subtitles=sub.srt:force_style='FontName=Arial' out.mp4` A box outline will appear in the middle of the arabic word. {{{ ffmpeg version N-119396-g48c0dba23b-20250430 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 14.2.0 (crosstool-NG 1.27.0.18_7458341) }}} According to: https://bugs.kde.org/show_bug.cgi?id=502725 this issue has existed for 2 years. -- -- Ticket URL: <https://trac.ffmpeg.org/ticket/11566#comment:1> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker
#11566: Arabic subtitles rendering artifact for lacking font support ------------------------------------+----------------------------------- Reporter: ellat | Owner: (none) Type: defect | Status: closed Priority: normal | Component: ffmpeg Version: git-master | Resolution: wontfix Keywords: subtitles | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 1 | ------------------------------------+----------------------------------- Changes (by MasterQuestionable): * analyzed: 0 => 1 * cc: MasterQuestionable (added) * resolution: => wontfix * status: new => closed * summary: Arabic subtitles rendering artifact BUG => Arabic subtitles rendering artifact for lacking font support Comment: ͏ Such square box is fundamentally fonts issue. ͏ https://invent.kde.org/-/project/19/uploads/1fcc483f909f20539836dc25b857dd24... ͏ . ͏ As you've reckoned: ͏ https://bugs.kde.org/show_bug.cgi?id=502725#c3 ͏ Characters maybe unsupported by the font. ͏ Nothing FFmpeg can help. -- Ticket URL: <https://trac.ffmpeg.org/ticket/11566#comment:2> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker
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