[FFmpeg-trac] #6947(undetermined:new): Unwanted visual formatting added when embedding subtitles
FFmpeg
trac at avcodec.org
Mon Jan 14 10:26:46 EET 2019
#6947: Unwanted visual formatting added when embedding subtitles
-------------------------------------+-------------------------------------
Reporter: forthrin | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: mov_text | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Comment (by forthrin):
The exact same problem persists with Git head:
{{{
~$ cat a.srt
1
00:00:00,000 --> 00:10:00,000
The quick brown fox jumps
over the lazy dog.
~$ ffmpeg -i a.mp4 -i a.srt -vcodec copy -scodec mov_text b.mp4
ffmpeg version git-2019-01-12-1ea5529 Copyright (c) 2000-2019 the FFmpeg
developers
built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
configuration: --enable-libx264 --enable-gpl
libavutil 56. 25.100 / 56. 25.100
libavcodec 58. 43.101 / 58. 43.101
libavformat 58. 25.100 / 58. 25.100
libavdevice 58. 6.101 / 58. 6.101
libavfilter 7. 48.100 / 7. 48.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.12.100
Duration: 00:00:10.09, start: 0.000000, bitrate: 2549 kb/s
Chapter #0:0: start 0.000000, end 10.000000
Metadata:
title :
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080 [SAR 1:1 DAR 16:9], 906 kb/s, 23.98 fps, 23.98 tbr, 24k tbn,
47.95 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: dts (DTS-HD MA) (mp4a / 0x6134706D), 48000
Hz, stereo, s16p (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Data: bin_data (text / 0x74786574), 0 kb/s
Metadata:
handler_name : SubtitleHandler
Input #1, srt, from 'a.srt':
Duration: N/A, bitrate: N/A
Stream #1:0: Subtitle: subrip
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (dts (dca) -> aac (native))
Stream #1:0 -> #0:2 (subrip (srt) -> mov_text (native))
Press [q] to stop, [?] for help
Output #0, mp4, to 'b.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.25.100
Chapter #0:0: start 0.000000, end 10.000000
Metadata:
title :
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 906 kb/s, 23.98 fps, 23.98 tbr, 24k
tbn, 24k tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp (16 bit), 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc58.43.101 aac
Stream #0:2: Subtitle: mov_text (tx3g / 0x67337874)
Metadata:
encoder : Lavc58.43.101 mov_text
frame= 242 fps=0.0 q=-1.0 Lsize= 1278kB time=00:00:10.00
bitrate=1046.7kbits/s speed=46.5x
video:1117kB audio:150kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.897478%
[aac @ 0x7ff8d2006400] Qavg: 4652.685
~$ ffmpeg -i b.mp4 b.srt
ffmpeg version git-2019-01-12-1ea5529 Copyright (c) 2000-2019 the FFmpeg
developers
built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
configuration: --enable-libx264 --enable-gpl
libavutil 56. 25.100 / 56. 25.100
libavcodec 58. 43.101 / 58. 43.101
libavformat 58. 25.100 / 58. 25.100
libavdevice 58. 6.101 / 58. 6.101
libavfilter 7. 48.100 / 7. 48.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'b.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.25.100
Duration: 00:10:00.00, start: 0.000000, bitrate: 17 kb/s
Chapter #0:0: start 0.000000, end 10.000000
Metadata:
title :
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1920x1080 [SAR 1:1 DAR 16:9], 906 kb/s, 23.98 fps, 23.98 tbr, 24k tbn,
47.95 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 122 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(und): Subtitle: mov_text (tx3g / 0x67337874) (default)
Metadata:
handler_name : SubtitleHandler
Stream #0:3(eng): Data: bin_data (text / 0x74786574), 0 kb/s
Metadata:
handler_name : SubtitleHandler
Output #0, srt, to 'b.srt':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.25.100
Chapter #0:0: start 0.000000, end 10.000000
Metadata:
title :
Stream #0:0(und): Subtitle: subrip (srt) (default)
Metadata:
handler_name : SubtitleHandler
encoder : Lavc58.43.101 srt
Stream mapping:
Stream #0:2 -> #0:0 (mov_text (native) -> subrip (srt))
Press [q] to stop, [?] for help
size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 41.975307%
~$ cat b.srt
1
00:00:00,000 --> 00:10:00,000
<font face="Serif" size="18">The quick brown fox jumps
over the lazy dog.</font>
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6947#comment:4>
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