Opened 3 years ago
Closed 3 years ago
#9436 closed defect (invalid)
Strange subtitles "Chapter 01" added when input has chapters and output is mp4
| Reported by: | Andre | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | unspecified | Keywords: | |
| Cc: | Andre | Blocked By: | |
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
I am trying to remux from MKV to MP4.
A tx3g stream containing subtitles keeps appearing out of nowhere.
Same bug is described here: https://www.reddit.com/r/ffmpeg/comments/o0ve8e/when_changing_from_mkv_to_mp4_a_subtitle_tx3g/
Summary of the bug:
When an input video has chapters and the output format is mp4, an undesired subtitles stream is added, containing the texts "Chapter 01", "Chapter 02" etc.
How to reproduce:
ffmpeg -v 9 -loglevel 99 -i /t/chap.mkv -c copy /t/sub.mp4
ffmpeg version 2021-09-22-git-447cf53774-full_build-www.gyan.dev Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 10.3.0 (Rev5, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
libavutil 57. 6.100 / 57. 6.100
libavcodec 59. 9.100 / 59. 9.100
libavformat 59. 5.100 / 59. 5.100
libavdevice 59. 0.101 / 59. 0.101
libavfilter 8. 9.100 / 8. 9.100
libswscale 6. 1.100 / 6. 1.100
libswresample 4. 0.100 / 4. 0.100
libpostproc 56. 0.100 / 56. 0.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '99'.
Reading option '-i' ... matched as input url with argument 'T:/chap.mkv'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option 'T:/sub.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Successfully parsed a group of options.
Parsing a group of options: input url T:/chap.mkv.
Successfully parsed a group of options.
Opening an input file: T:/chap.mkv.
[NULL @ 0000020f5076f000] Opening 'T:/chap.mkv' for reading
[file @ 0000020f5076f5c0] Setting default whitelist 'file,crypto,data'
Probing matroska,webm score:100 size:2048
[matroska,webm @ 0000020f5076f000] Format matroska,webm probed with size=2048 and score=100
st:0 removing common factor 1000000 from timebase
[matroska,webm @ 0000020f5076f000] Before avformat_find_stream_info() pos: 2198 bytes read:32768 seeks:0 nb_streams:1
[mpeg2video @ 0000020f50773500] Format yuv420p chosen by get_format().
[matroska,webm @ 0000020f5076f000] All info found
[matroska,webm @ 0000020f5076f000] stream 0: start_time: 0.509 duration: NOPTS
[matroska,webm @ 0000020f5076f000] format: start_time: 0.509 duration: 2.443 (estimate from stream) bitrate=5429 kb/s
[matroska,webm @ 0000020f5076f000] After avformat_find_stream_info() pos: 140585 bytes read:147318 seeks:0 frames:2
Input #0, matroska,webm, from 'T:/chap.mkv':
Metadata:
title : TROPA_DE_ELITE_II
ENCODER : Lavf59.4.102
Duration: 00:00:02.44, start: 0.509000, bitrate: 5429 kb/s
Chapters:
Chapter #0:0: start 0.000000, end 134.241500
Metadata:
title : Chapter 02
Chapter #0:1: start 134.241500, end 519.626500
Metadata:
title : Chapter 03
Chapter #0:2: start 519.626500, end 1015.121500
Metadata:
title : Chapter 04
Chapter #0:3: start 1015.121500, end 1428.034000
Metadata:
title : Chapter 05
Chapter #0:4: start 1428.034000, end 1773.379000
Metadata:
title : Chapter 06
Chapter #0:5: start 1773.379000, end 2151.256500
Metadata:
title : Chapter 07
Chapter #0:6: start 2151.256500, end 2989.093500
Metadata:
title : Chapter 08
Chapter #0:7: start 2989.093500, end 3444.048000
Metadata:
title : Chapter 09
Chapter #0:8: start 3444.048000, end 3865.969500
Metadata:
title : Chapter 10
Chapter #0:9: start 3865.969500, end 4014.117500
Metadata:
title : Chapter 11
Chapter #0:10: start 4014.117500, end 4422.025000
Metadata:
title : Chapter 12
Chapter #0:11: start 4422.025000, end 4832.435000
Metadata:
title : Chapter 13
Chapter #0:12: start 4832.435000, end 5077.179500
Metadata:
title : Chapter 14
Chapter #0:13: start 5077.179500, end 5429.531500
Metadata:
title : Chapter 15
Chapter #0:14: start 5429.531500, end 5512.114000
Metadata:
title : Chapter 16
Chapter #0:15: start 5512.114000, end 5961.563000
Metadata:
title : Chapter 17
Chapter #0:16: start 5961.563000, end 6280.214667
Metadata:
title : Chapter 18
Stream #0:0(eng), 2, 1/1000: Video: mpeg2video (Main), 1 reference frame, yuv420p(tv, smpte170m, progressive, left), 720x480 [SAR 32:27 DAR 16:9], 0/1, 7000 kb/s, SAR 186:157 DAR 279:157, 29.97 fps, 29.97 tbr, 1k tbn
Metadata:
BPS-eng : 6998906
DURATION-eng : 01:54:48.214666666
NUMBER_OF_FRAMES-eng: 206440
NUMBER_OF_BYTES-eng: 6026245570
SOURCE_ID-eng : 0100E0
_STATISTICS_WRITING_APP-eng: MakeMKV v1.16.4 win(x64-release)
_STATISTICS_WRITING_DATE_UTC-eng: 2021-09-20 00:45:38
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
DURATION : 00:00:02.443000000
Side data:
cpb: bitrate max/min/avg: 7000000/0/0 buffer size: 1835008 vbv_delay: N/A
Successfully opened the file.
Parsing a group of options: output url T:/sub.mp4.
Applying option c (codec name) with argument copy.
Successfully parsed a group of options.
Opening an output file: T:/sub.mp4.
[file @ 0000020f50777740] Setting default whitelist 'file,crypto,data'
Successfully opened the file.
Output #0, mp4, to 'T:/sub.mp4':
Metadata:
title : TROPA_DE_ELITE_II
encoder : Lavf59.5.100
Chapters:
Chapter #0:0: start 0.000000, end 133.732500
Metadata:
title : Chapter 02
Chapter #0:1: start 133.732500, end 519.117500
Metadata:
title : Chapter 03
Chapter #0:2: start 519.117500, end 1014.612500
Metadata:
title : Chapter 04
Chapter #0:3: start 1014.612500, end 1427.525000
Metadata:
title : Chapter 05
Chapter #0:4: start 1427.525000, end 1772.870000
Metadata:
title : Chapter 06
Chapter #0:5: start 1772.870000, end 2150.747500
Metadata:
title : Chapter 07
Chapter #0:6: start 2150.747500, end 2988.584500
Metadata:
title : Chapter 08
Chapter #0:7: start 2988.584500, end 3443.539000
Metadata:
title : Chapter 09
Chapter #0:8: start 3443.539000, end 3865.460500
Metadata:
title : Chapter 10
Chapter #0:9: start 3865.460500, end 4013.608500
Metadata:
title : Chapter 11
Chapter #0:10: start 4013.608500, end 4421.516000
Metadata:
title : Chapter 12
Chapter #0:11: start 4421.516000, end 4831.926000
Metadata:
title : Chapter 13
Chapter #0:12: start 4831.926000, end 5076.670500
Metadata:
title : Chapter 14
Chapter #0:13: start 5076.670500, end 5429.022500
Metadata:
title : Chapter 15
Chapter #0:14: start 5429.022500, end 5511.605000
Metadata:
title : Chapter 16
Chapter #0:15: start 5511.605000, end 5961.054000
Metadata:
title : Chapter 17
Chapter #0:16: start 5961.054000, end 6279.705667
Metadata:
title : Chapter 18
Stream #0:0(eng), 0, 1/16000: Video: mpeg2video (Main), 1 reference frame (mp4v / 0x7634706D), yuv420p(tv, smpte170m, progressive, left), 720x480 (0x0) [SAR 186:157 DAR 279:157], 0/1, q=2-31, 7000 kb/s, 29.97 fps, 29.97 tbr, 16k tbn
Metadata:
BPS-eng : 6998906
DURATION-eng : 01:54:48.214666666
NUMBER_OF_FRAMES-eng: 206440
NUMBER_OF_BYTES-eng: 6026245570
SOURCE_ID-eng : 0100E0
_STATISTICS_WRITING_APP-eng: MakeMKV v1.16.4 win(x64-release)
_STATISTICS_WRITING_DATE_UTC-eng: 2021-09-20 00:45:38
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
DURATION : 00:00:02.443000000
Side data:
cpb: bitrate max/min/avg: 7000000/0/0 buffer size: 1835008 vbv_delay: N/A
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
No more output streams to write to, finishing.e=-00:00:00.03 bitrate=N/A speed=N/A
frame= 58 fps=0.0 q=-1.0 Lsize= 1620kB time=00:00:01.86 bitrate=7102.9kbits/s speed= 588x
video:1616kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.203237%
Input file #0 (T:/chap.mkv):
Input stream #0:0 (video): 58 packets read (1655211 bytes);
Total: 58 packets (1655211 bytes) demuxed
Output file #0 (T:/sub.mp4):
Output stream #0:0 (video): 58 packets muxed (1655211 bytes);
Total: 58 packets (1655211 bytes) muxed
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0000020f507992c0] Statistics: 2 seeks, 10 writeouts
[AVIOContext @ 0000020f50777a80] Statistics: 1657989 bytes read, 0 seeks
Checking the extra subtitle stream:
ffprobe /t/sub.mp4
ffprobe version 2021-09-22-git-447cf53774-full_build-www.gyan.dev Copyright (c) 2007-2021 the FFmpeg developers
built with gcc 10.3.0 (Rev5, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
libavutil 57. 6.100 / 57. 6.100
libavcodec 59. 9.100 / 59. 9.100
libavformat 59. 5.100 / 59. 5.100
libavdevice 59. 0.101 / 59. 0.101
libavfilter 8. 9.100 / 8. 9.100
libswscale 6. 1.100 / 6. 1.100
libswresample 4. 0.100 / 4. 0.100
libpostproc 56. 0.100 / 56. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'T:/sub.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
title : TROPA_DE_ELITE_II
encoder : Lavf59.5.100
Duration: 01:44:39.71, start: 0.000000, bitrate: 2 kb/s
Chapters:
Chapter #0:0: start 0.000000, end 133.733000
Metadata:
title : Chapter 02
Chapter #0:1: start 133.733000, end 519.118000
Metadata:
title : Chapter 03
Chapter #0:2: start 519.118000, end 1014.613000
Metadata:
title : Chapter 04
Chapter #0:3: start 1014.613000, end 1427.525000
Metadata:
title : Chapter 05
Chapter #0:4: start 1427.525000, end 1772.870000
Metadata:
title : Chapter 06
Chapter #0:5: start 1772.870000, end 2150.748000
Metadata:
title : Chapter 07
Chapter #0:6: start 2150.748000, end 2988.585000
Metadata:
title : Chapter 08
Chapter #0:7: start 2988.585000, end 3443.539000
Metadata:
title : Chapter 09
Chapter #0:8: start 3443.539000, end 3865.461000
Metadata:
title : Chapter 10
Chapter #0:9: start 3865.461000, end 4013.609000
Metadata:
title : Chapter 11
Chapter #0:10: start 4013.609000, end 4421.516000
Metadata:
title : Chapter 12
Chapter #0:11: start 4421.516000, end 4831.926000
Metadata:
title : Chapter 13
Chapter #0:12: start 4831.926000, end 5076.671000
Metadata:
title : Chapter 14
Chapter #0:13: start 5076.671000, end 5429.023000
Metadata:
title : Chapter 15
Chapter #0:14: start 5429.023000, end 5511.605000
Metadata:
title : Chapter 16
Chapter #0:15: start 5511.605000, end 5961.054000
Metadata:
title : Chapter 17
Chapter #0:16: start 5961.054000, end 6279.706000
Metadata:
title : Chapter 18
Stream #0:0[0x1](eng): Video: mpeg2video (Main) (mp4v / 0x7634706D), yuv420p(tv, smpte170m, progressive), 720x480 [SAR 32:27 DAR 16:9], 6846 kb/s, SAR 186:157 DAR 279:157, 29.99 fps, 29.97 tbr, 16k tbn (default)
Metadata:
handler_name : VideoHandler
vendor_id : [0][0][0][0]
Side data:
cpb: bitrate max/min/avg: 7000000/0/0 buffer size: 1835008 vbv_delay: N/A
Stream #0:1[0x2](eng): Data: bin_data (text / 0x74786574)
Metadata:
handler_name : SubtitleHandler
Unsupported codec with id 98314 for input stream 1
Attachments (1)
Change History (2)
by , 3 years ago
comment:1 by , 3 years ago
| Resolution: | → invalid |
|---|---|
| Status: | new → closed |
It does not appear "out of nowhere", it appears because the source file contained chapters and ffmpeg by default tries to preserve them. That it appears as a subtitle stream is an oddity of mp4, where chapters and subtitles are muxed similarly. But a proper player can distinguish between them, as ffmpeg/ffprobe do: They show it as data stream (notice the "Data:"), not as subtitle.
If your mp4 player got confused by this, you can disable copying of chapters with -map_chapters -1.
Note:
See TracTickets
for help on using tickets.
sample video file with chapters