[FFmpeg-trac] #8026(ffmpeg:new): Subtitles

FFmpeg trac at avcodec.org
Tue Jul 16 19:21:01 EEST 2019


#8026: Subtitles
--------------------------------+---------------------------------------
             Reporter:  hmmh    |                     Type:  defect
               Status:  new     |                 Priority:  normal
            Component:  ffmpeg  |                  Version:  unspecified
             Keywords:          |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
--------------------------------+---------------------------------------
 If I add three subtitles I get a error "Starting new cluster due to
 timestamp".
 If I add less than three subtitles, it doesn't.
 This error has existed for several years.
 Some TVs have trouble playing the video with this error.

 Test files:
 https://www110.zippyshare.com/v/bJoDzEbV/file.html


 Another bug:
 During encoding of video the time on the screen freezes when the video has
 subtitles.

 frame = 57064 fps = 8057 q = -1.0 size = 530086kB '''time = 01:12:09.99'''
 bitrate = 1002.9kbits / s speed = 611x
 ______________________________


 e:\>ffmpeg -report -y -i test.mp4 -i tit1.srt -i tit2.srt -i tit3.srt -map
 0:v -map 0:a -map 1:s -map 2:
 s -map 3:s -c copy -c:s srt out.mkv
 ffmpeg started on 2019-07-11 at 19:43:44
 Report written to "ffmpeg-20190711-194344.log"
 ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers
   built with gcc 7.3.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 bzlib --enable-fontconfig --enable-gnutls --enabl
 e-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-
 libmp3lame --enable-libopencore-amrnb --enable-
 libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine
 --enable-libsnappy --enable-libsoxr --enable-l
 ibtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-
 libwebp --enable-libx264 --enable-libx265 --en
 able-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
 --enable-libvidstab --enable-libvorbis --enable-l
 ibvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid
 --enable-libmfx --enable-cuda --enable-cuvid --enabl
 e-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
   libavutil      55. 78.100 / 55. 78.100
   libavcodec     57.107.100 / 57.107.100
   libavformat    57. 83.100 / 57. 83.100
   libavdevice    57. 10.100 / 57. 10.100
   libavfilter     6.107.100 /  6.107.100
   libswscale      4.  8.100 /  4.  8.100
   libswresample   2.  9.100 /  2.  9.100
   libpostproc    54.  7.100 / 54.  7.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf57.83.100
   Duration: 00:02:00.05, start: 0.000000, bitrate: 255 kb/s
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 640x360 [SAR 1:1 DAR 16:9], 182 kb/s, 29.97 fps,
 29.97 tbr, 30k tbn, 59.94 tbc (default)
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
 stereo, fltp, 64 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
 Input #1, srt, from 'tit1.srt':
   Duration: N/A, bitrate: N/A
     Stream #1:0: Subtitle: subrip
 Input #2, srt, from 'tit2.srt':
   Duration: N/A, bitrate: N/A
     Stream #2:0: Subtitle: subrip
 Input #3, srt, from 'tit3.srt':
   Duration: N/A, bitrate: N/A
     Stream #3:0: Subtitle: subrip
 Output #0, matroska, to 'out.mkv':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf57.83.100
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
 640x360 [SAR 1:1 DAR 16:9], q=2-31, 182 kb/s, 29.
 97 fps, 29.97 tbr, 1k tbn, 30k tbc (default)
     Metadata:
       handler_name    : VideoHandler
     Stream #0:1(und): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 44100 Hz,
 stereo, fltp, 64 kb/s (default)
     Metadata:
       handler_name    : SoundHandler
     Stream #0:2: Subtitle: subrip (srt)
     Metadata:
       encoder         : Lavc57.107.100 srt
     Stream #0:3: Subtitle: subrip (srt)
     Metadata:
       encoder         : Lavc57.107.100 srt
     Stream #0:4: Subtitle: subrip (srt)
     Metadata:
       encoder         : Lavc57.107.100 srt
 Stream mapping:
   Stream #0:0 -> #0:0 (copy)
   Stream #0:1 -> #0:1 (copy)
   Stream #1:0 -> #0:2 (subrip (srt) -> subrip (srt))
   Stream #2:0 -> #0:3 (subrip (srt) -> subrip (srt))
   Stream #3:0 -> #0:4 (subrip (srt) -> subrip (srt))
 Press [q] to stop, [?] for help
 '''[matroska @ 00000000003eaf00] Starting new cluster due to timestamp'''
 frame= 3597 fps=0.0 q=-1.0 Lsize=    3681kB time=00:02:00.00 bitrate=
 251.3kbits/s speed= 513x
 video:2675kB audio:943kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 1.730430%

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8026>
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