[FFmpeg-trac] #5877(avformat:new): subrip always converted to mov_txt for mp4
FFmpeg
trac at avcodec.org
Thu Oct 6 03:38:44 EEST 2016
#5877: subrip always converted to mov_txt for mp4
------------------------------------+--------------------------------------
Reporter: blacktrash | Type: defect
Status: new | Priority: important
Component: avformat | Version: git-master
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
------------------------------------+--------------------------------------
Summary of the bug:
Subtitles are non-discardable when transcoding to mp4. `-sn` or mapping
does not help.
Variant of #5492.
Setting to important. Similarly to #5492, I want ffmpeg to do what I tell
it.
To add insult to injury ffmpeg lies in its output by pretending to convert
only video and audio.
How to reproduce:
{{{
$ ffmpeg -i subrip-short.mkv -dn -sn -map 0:V -map 0:a test.mp4
ffmpeg version N-81879-g3cc9d6d Copyright (c) 2000-2016 the FFmpeg
developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --enable-gpl --enable-nonfree --disable-ffserver
--enable-shared --enable-libspeex --enable-libopus --enable-libfdk-aac
--enable-libx265 --enable-libx264 --enable-libxvid --enable-libmp3lame
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab
--extra-cflags=-I/sw/include --extra-libs=-L/sw/lib --enable-gnutls
libavutil 55. 32.100 / 55. 32.100
libavcodec 57. 60.101 / 57. 60.101
libavformat 57. 51.102 / 57. 51.102
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 63.100 / 6. 63.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 2.100 / 2. 2.100
libpostproc 54. 0.100 / 54. 0.100
Input #0, matroska,webm, from 'subrip-short.mkv':
Metadata:
ENCODER : Lavf57.51.102
Duration: 00:00:03.38, start: 0.000000, bitrate: 4970 kb/s
Chapter #0:0: start 0.000000, end 3.000000
Metadata:
title : Chapter 2
Stream #0:0(eng): Video: h264 (High), yuv420p, 1280x534, SAR 1:1 DAR
640:267, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Metadata:
DURATION : 00:00:03.086000000
Stream #0:1(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 640 kb/s
Metadata:
DURATION : 00:00:03.006000000
Stream #0:2(fre): Subtitle: subrip
Metadata:
DURATION : 00:00:03.379000000
[libx264 @ 0x7f879c0e5200] using SAR=1/1
[libx264 @ 0x7f879c0e5200] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX
[libx264 @ 0x7f879c0e5200] profile High, level 3.1
[libx264 @ 0x7f879c0e5200] 264 - core 148 r2721 72d53ab - H.264/MPEG-4 AVC
codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options:
cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1
psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12
lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23
scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'test.mp4':
Metadata:
encoder : Lavf57.51.102
Chapter #0:0: start 0.000000, end 3.000000
Metadata:
title : Chapter 2
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021),
yuv420p, 1280x534 [SAR 1:1 DAR 640:267], q=-1--1,23.98 fps, 24k tbn, 23.98
tbc (default)
Metadata:
DURATION : 00:00:03.086000000
encoder : Lavc57.60.101 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz,
5.1(side), fltp, 341 kb/s
Metadata:
DURATION : 00:00:03.006000000
encoder : Lavc57.60.101 aac
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (ac3 (native) -> aac (native))
Press [q] to stop, [?] for help
frame= 74 fps= 58 q=-1.0 Lsize= 550kB time=00:00:03.01
bitrate=1492.5kbits/s speed=2.37x
video:420kB audio:125kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.725212%
[libx264 @ 0x7f879c0e5200] frame I:3 Avg QP:20.25 size: 31525
[libx264 @ 0x7f879c0e5200] frame P:21 Avg QP:23.35 size: 8062
[libx264 @ 0x7f879c0e5200] frame B:50 Avg QP:25.10 size: 3317
[libx264 @ 0x7f879c0e5200] consecutive B-frames: 6.8% 5.4% 12.2% 75.7%
[libx264 @ 0x7f879c0e5200] mb I I16..4: 19.3% 62.0% 18.7%
[libx264 @ 0x7f879c0e5200] mb P I16..4: 4.4% 10.7% 1.4% P16..4: 32.3%
6.8% 3.4% 0.0% 0.0% skip:41.1%
[libx264 @ 0x7f879c0e5200] mb B I16..4: 0.7% 1.0% 0.1% B16..8: 37.3%
4.1% 0.6% direct: 1.4% skip:54.8% L0:45.4% L1:49.7% BI: 4.8%
[libx264 @ 0x7f879c0e5200] 8x8 transform intra:62.8% inter:87.5%
[libx264 @ 0x7f879c0e5200] coded y,uvDC,uvAC intra: 55.2% 60.7% 22.3%
inter: 9.1% 9.6% 0.1%
[libx264 @ 0x7f879c0e5200] i16 v,h,dc,p: 46% 36% 3% 14%
[libx264 @ 0x7f879c0e5200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 23% 14% 4%
4% 5% 4% 5% 6%
[libx264 @ 0x7f879c0e5200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 35% 28% 10% 4%
5% 6% 5% 4% 4%
[libx264 @ 0x7f879c0e5200] i8c dc,h,v,p: 43% 29% 25% 3%
[libx264 @ 0x7f879c0e5200] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7f879c0e5200] ref P L0: 66.8% 17.0% 10.6% 5.6%
[libx264 @ 0x7f879c0e5200] ref B L0: 93.4% 5.5% 1.1%
[libx264 @ 0x7f879c0e5200] ref B L1: 98.0% 2.0%
[libx264 @ 0x7f879c0e5200] kb/s:1113.88
[aac @ 0x7f879c0e8600] Qavg: 121.899
$ ffprobe -select_streams s -show_entries stream=codec_name test.mp4
ffprobe version N-81879-g3cc9d6d Copyright (c) 2007-2016 the FFmpeg
developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
configuration: --enable-gpl --enable-nonfree --disable-ffserver
--enable-shared --enable-libspeex --enable-libopus --enable-libfdk-aac
--enable-libx265 --enable-libx264 --enable-libxvid --enable-libmp3lame
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libvidstab
--extra-cflags=-I/sw/include --extra-libs=-L/sw/lib --enable-gnutls
libavutil 55. 32.100 / 55. 32.100
libavcodec 57. 60.101 / 57. 60.101
libavformat 57. 51.102 / 57. 51.102
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 63.100 / 6. 63.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 2.100 / 2. 2.100
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.51.102
Duration: 00:00:03.09, start: 0.000000, bitrate: 1458 kb/s
Chapter #0:0: start 0.000000, end 3.000000
Metadata:
title : Chapter 2
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x534 [SAR 1:1 DAR 640:267], 1115 kb/s, 23.98fps, 23.98 tbr, 24k tbn,
47.95 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1,
fltp, 342 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s
Metadata:
handler_name : SubtitleHandler
[STREAM]
codec_name=mov_text
[/STREAM]
}}}
Sample attached.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/5877>
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