[FFmpeg-trac] #11594(avcodec:new): Hardcoding subtitles broken with libx265 since 20241205

[FFmpeg]

#11594: Hardcoding subtitles broken with libx265 since 20241205
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             Reporter:  SubJunk     |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by SubJunk):

 Hi Gyan, thanks for the quick response.

 The input file it uses is
 https://github.com/UniversalMediaServer/UniversalMediaServer/blob/7065d765dac8acdc57d13a5628d15b891b3b1fdf/src/test/resources/net/pms/parsers
 /video-h265_dolbyvision_p08.06-eac3_dolby_surround_ex-srt.mkv

 The output is:
 {{{
 Input #0, matroska,webm, from
 'D:\a\UniversalMediaServer\UniversalMediaServer\target\test-
 classes\net\pms\parsers\video-h265_dolbyvision_p08.06
 -eac3_dolby_surround_ex-srt.mkv':
 Metadata:
 encoder         : libebml v1.4.5 + libmatroska v1.7.1
 creation_time   : 2025-05-17T05:48:07.000000Z
 Duration: 00:02:12.90, start: 0.000000, bitrate: 1151 kb/s
 Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv,
 bt2020nc/bt2020/smpte2084), 3840x1608, SAR 1:1 DAR 160:67, 23.98 fps,
 23.98 tbr, 1k tbn (default)
 Metadata:
 BPS             : 12605646
 DURATION        : 00:00:10.427000000
 NUMBER_OF_FRAMES: 250
 NUMBER_OF_BYTES : 16429884
 _STATISTICS_WRITING_APP: mkvmerge v92.0 ('Everglow') 64-bit
 _STATISTICS_WRITING_DATE_UTC: 2025-05-17 05:48:07
 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Side data:
 DOVI configuration record: version: 1.0, profile: 8, level: 6, rpu flag:
 1, el flag: 0, bl flag: 1, compatibility id: 1, compression: 0
 Stream #0:1(eng): Audio: eac3, 48000 Hz, 7.1, fltp, 1536 kb/s (default)
 Metadata:
 title           : DDP 7.1
 BPS             : 1536000
 DURATION        : 00:00:10.432000000
 NUMBER_OF_FRAMES: 326
 NUMBER_OF_BYTES : 2002944
 _STATISTICS_WRITING_APP: mkvmerge v92.0 ('Everglow') 64-bit
 _STATISTICS_WRITING_DATE_UTC: 2025-05-17 05:48:07
 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:2(eng): Subtitle: subrip (srt) (default)
 Metadata:
 BPS             : 85
 DURATION        : 00:02:10.794000000
 NUMBER_OF_FRAMES: 44
 NUMBER_OF_BYTES : 1406
 _STATISTICS_WRITING_APP: mkvmerge v92.0 ('Everglow') 64-bit
 _STATISTICS_WRITING_DATE_UTC: 2025-05-17 05:48:07
 _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
 Stream #0:3: Video: png, rgb24(pc, gbr/unknown/unknown), 608x759 [SAR
 3780:3780 DAR 608:759], 90k tbr, 90k tbn (attached pic)
 Metadata:
 filename        : Knock at the Cabin 2023 4K DV BiTOR.PNG
 mimetype        : image/png
 Stream mapping:
 Stream #0:0 (hevc) -> overlay
 Stream #0:2 (srt) -> overlay
 overlay:default -> Stream #0:0 (libx265)
 Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 [libx265 @ 000001d173492880] Loaded libx265 does not support alpha layer
 encoding.
 [vost#0:0/libx265 @ 000001d173492640] [enc:libx265 @ 000001d1733b97c0]
 Error while opening encoder - maybe incorrect parameters such as bit_rate,
 rate, width or height.
 [fc#0 @ 000001d1731e5840] Error sending frames to consumers: Error number
 -129 occurred
 [fc#0 @ 000001d1731e5840] Task finished with error code: -129 (Error
 number -129 occurred)
 [fc#0 @ 000001d1731e5840] Terminating thread with return code -129 (Error
 number -129 occurred)
 [vost#0:0/libx265 @ 000001d173492640] [enc:libx265 @ 000001d1733b97c0]
 Could not open encoder before EOF
 [vost#0:0/libx265 @ 000001d173492640] Task finished with error code: -22
 (Invalid argument)
 [vost#0:0/libx265 @ 000001d173492640] Terminating thread with return code
 -22 (Invalid argument)
 [out#0/mpegts @ 000001d1732aef00] Nothing was written into output file,
 because at least one of its streams received no packets.
 frame=    0 fps=0.0 q=0.0 Lsize=       0KiB time=N/A bitrate=N/A speed=N/A
 elapsed=0:00:00.52
 Conversion failed!
 }}}

 That file is just one I muxed together to demonstrate the problem, but
 this happens on a lot of real world files too


 The test runs on GitHub Actions so the output for your latest build is
 here
 https://github.com/UniversalMediaServer/UniversalMediaServer/actions/runs/15091954469/job/42421723488#step:5:7501
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11594#comment:2>
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