[FFmpeg-user] reserve output stream for delayed subtitles ?

Discussion:

sean darcy

2018-11-21 20:23:01 UTC

I have a 1949 french movie. I need the subtitles, my french isn't good
enough any more !

The problem is that the subtitles stream doesn't start until 85 seconds
into the movie. I've map'd the subtitle stream , but the output stream
isn't created. I assume that's because there's no input subtitles stream
at the start.

I've tried:
ffmpeg -i in -ss 00:01:30 -i in -map 0:1 -map 0:2 -map 1:4 .... but that
didn't work since ffmpeg still looked for the subtitles stream at the
beginning, not at the seek position. In any event I think that would
have had the subtitles appearing 90 secs before the dialog.

long output. You can see the subtitle streams appear at 85 secs.

ffmpeg -i VTS_01_1.VOB -r 24000/1001 -map v -map a -map 0:4 -c:v libx264
-crf 20 -tune film -preset slow -c:a copy -c:s copy -dn -t 00:02:00
short-1949-subs.mp4
ffmpeg version git-snapshot-20181112-RPMFusion Copyright (c) 2000-2018
the FFmpeg developers
built with gcc 8 (GCC)
configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64
--optflags='-O2 -ffast-math -march=native -ftree-vectorize
-fomit-frame-pointer -pipe -fPIC' --enable-bzlib --disable-crystalhd
--enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls
--enable-ladspa --enable-libass --enable-libbluray --enable-libcdio
--enable-libdav1d --enable-libfdk-aac --enable-nonfree
--enable-indev=jack --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libmp3lame --enable-openal --enable-opencl
--disable-libopencv --enable-opengl --enable-libopenjpeg
--enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex
--enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx
--enable-libwebp --enable-libx264 --enable-libx265 --enable-avfilter
--enable-postproc --enable-pthreads --disable-static --enable-shared
--enable-gpl --enable-version3 --enable-nonfree --disable-debug
--enable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
libavutil 56. 23.101 / 56. 23.101
libavcodec 58. 39.100 / 58. 39.100
libavformat 58. 22.100 / 58. 22.100
libavdevice 58. 6.100 / 58. 6.100
libavfilter 7. 43.100 / 7. 43.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Input #0, mpeg, from 'VTS_01_1.VOB':
Duration: 00:29:44.30, start: 0.045500, bitrate: 4814 kb/s
Stream #0:0[0x1bf]: Data: dvd_nav_packet
Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv,
progressive), 720x480 [SAR 8:9 DAR 4:3], Closed Captions, 29.33 fps,
59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream mapping:
Stream #0:1 -> #0:0 (mpeg2video (native) -> h264 (libx264))
Stream #0:2 -> #0:1 (copy)
Press [q] to stop, [?] for help
[libx264 @ 0x149cf40] using SAR=8/9
[libx264 @ 0x149cf40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX FMA3 BMI2 AVX2
[libx264 @ 0x149cf40] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x149cf40] 264 - core 157 - H.264/MPEG-4 AVC codec - Copyleft
2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=5
deblock=1:-1:-1 analyse=0x3:0x113 me=hex subme=8 psy=1 psy_rd=1.00:0.15
mixed_ref=1 me_range=16 chroma_me=1 trellis=2 8x8dct=1 cqm=0
deadzone=21,11 fast_pskip=1 chroma_qp_offset=-3 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=3 weightb=1 open_gop=0 weightp=2 keyint=250
keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf
mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
aq=1:1.00
[mp4 @ 0x1470840] track 1: codec frame size is not set
Output #0, mp4, to 'short--1949-subs.mp4':
Metadata:
encoder : Lavf58.22.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p,
720x480 [SAR 8:9 DAR 4:3], q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc
Metadata:
encoder : Lavc58.39.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo,
fltp, 192 kb/s
[mpeg2video @ 0x14723c0] ac-tex damaged at 38 2500:01:03.64
bitrate=3459.7kbits/s dup=1 drop=0 speed=3.63x
[mpeg2video @ 0x14723c0] Warning MVs not available
[mpeg2video @ 0x14723c0] concealing 225 DC, 225 AC, 225 MV errors in I frame
[mpeg @ 0x1469c40] New subtitle stream 0:3 at pos:50339854 and
DTS:87.4328sbits/s dup=1 drop=0 speed= 3.3x
[mpeg @ 0x1469c40] New subtitle stream 0:4 at pos:50493454 and DTS:87.6664s
..........

ffprobe short-1949-subs.mp4
ffprobe version git-snapshot-20181112-RPMFusion Copyright (c) 2007-2018
the FFmpeg developers
built with gcc 8 (GCC)
configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64
--optflags='-O2 -ffast-math -march=native -ftree-vectorize
-fomit-frame-pointer -pipe -fPIC' --enable-bzlib --disable-crystalhd
--enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls
--enable-ladspa --enable-libass --enable-libbluray --enable-libcdio
--enable-libdav1d --enable-libfdk-aac --enable-nonfree
--enable-indev=jack --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libmp3lame --enable-openal --enable-opencl
--disable-libopencv --enable-opengl --enable-libopenjpeg
--enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex
--enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx
--enable-libwebp --enable-libx264 --enable-libx265 --enable-avfilter
--enable-postproc --enable-pthreads --disable-static --enable-shared
--enable-gpl --enable-version3 --enable-nonfree --disable-debug
--enable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
libavutil 56. 23.101 / 56. 23.101
libavcodec 58. 39.100 / 58. 39.100
libavformat 58. 22.100 / 58. 22.100
libavdevice 58. 6.100 / 58. 6.100
libavfilter 7. 43.100 / 7. 43.100
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 'short--1949-subs.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.22.100
Duration: 00:02:00.04, start: 0.000000, bitrate: 4345 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
720x480 [SAR 8:9 DAR 4:3], 4148 kb/s, 23.98 fps, 23.98 tbr, 24k tbn,
47.95 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo,
fltp, 192 kb/s (default)
Metadata:
handler_name : SoundHandler
Side data:
audio service type: main

Thanks for any help.

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Micael Silva

2018-11-21 20:38:15 UTC

Permalink

Post by sean darcy
I have a 1949 french movie. I need the subtitles, my french isn't good
enough any more !
The problem is that the subtitles stream doesn't start until 85 seconds
into the movie. I've map'd the subtitle stream , but the output stream
isn't created. I assume that's because there's no input subtitles stream
at the start.
ffmpeg -i in -ss 00:01:30 -i in -map 0:1 -map 0:2 -map 1:4 .... but that
didn't work since ffmpeg still looked for the subtitles stream at the
beginning, not at the seek position. In any event I think that would
have had the subtitles appearing 90 secs before the dialog.
long output. You can see the subtitle streams appear at 85 secs.
ffmpeg -i VTS_01_1.VOB -r 24000/1001 -map v -map a -map 0:4 -c:v libx264
-crf 20 -tune film -preset slow -c:a copy -c:s copy -dn -t 00:02:00
short-1949-subs.mp4
ffmpeg version git-snapshot-20181112-RPMFusion Copyright (c) 2000-2018
the FFmpeg developers
built with gcc 8 (GCC)
configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64
--optflags='-O2 -ffast-math -march=native -ftree-vectorize
-fomit-frame-pointer -pipe -fPIC' --enable-bzlib --disable-crystalhd
--enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls
--enable-ladspa --enable-libass --enable-libbluray --enable-libcdio
--enable-libdav1d --enable-libfdk-aac --enable-nonfree
--enable-indev=jack --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libmp3lame --enable-openal --enable-opencl
--disable-libopencv --enable-opengl --enable-libopenjpeg
--enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex
--enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx
--enable-libwebp --enable-libx264 --enable-libx265 --enable-avfilter
--enable-postproc --enable-pthreads --disable-static --enable-shared
--enable-gpl --enable-version3 --enable-nonfree --disable-debug
--enable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
libavutil 56. 23.101 / 56. 23.101
libavcodec 58. 39.100 / 58. 39.100
libavformat 58. 22.100 / 58. 22.100
libavdevice 58. 6.100 / 58. 6.100
libavfilter 7. 43.100 / 7. 43.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
Duration: 00:29:44.30, start: 0.045500, bitrate: 4814 kb/s
Stream #0:0[0x1bf]: Data: dvd_nav_packet
Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv,
progressive), 720x480 [SAR 8:9 DAR 4:3], Closed Captions, 29.33 fps,
59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:1 -> #0:0 (mpeg2video (native) -> h264 (libx264))
Stream #0:2 -> #0:1 (copy)
Press [q] to stop, [?] for help
AVX FMA3 BMI2 AVX2
2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=5
deblock=1:-1:-1 analyse=0x3:0x113 me=hex subme=8 psy=1 psy_rd=1.00:0.15
mixed_ref=1 me_range=16 chroma_me=1 trellis=2 8x8dct=1 cqm=0
deadzone=21,11 fast_pskip=1 chroma_qp_offset=-3 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=3 weightb=1 open_gop=0 weightp=2 keyint=250
keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf
mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
aq=1:1.00
encoder : Lavf58.22.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p,
720x480 [SAR 8:9 DAR 4:3], q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc
encoder : Lavc58.39.100 libx264
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1: Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo,
fltp, 192 kb/s
bitrate=3459.7kbits/s dup=1 drop=0 speed=3.63x
DTS:87.4328sbits/s dup=1 drop=0 speed= 3.3x
..........
ffprobe short-1949-subs.mp4
ffprobe version git-snapshot-20181112-RPMFusion Copyright (c) 2007-2018
the FFmpeg developers
built with gcc 8 (GCC)
configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64
--optflags='-O2 -ffast-math -march=native -ftree-vectorize
-fomit-frame-pointer -pipe -fPIC' --enable-bzlib --disable-crystalhd
--enable-fontconfig --enable-frei0r --enable-gcrypt --enable-gnutls
--enable-ladspa --enable-libass --enable-libbluray --enable-libcdio
--enable-libdav1d --enable-libfdk-aac --enable-nonfree
--enable-indev=jack --enable-libfreetype --enable-libfribidi
--enable-libgsm --enable-libmp3lame --enable-openal --enable-opencl
--disable-libopencv --enable-opengl --enable-libopenjpeg
--enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex
--enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvpx
--enable-libwebp --enable-libx264 --enable-libx265 --enable-avfilter
--enable-postproc --enable-pthreads --disable-static --enable-shared
--enable-gpl --enable-version3 --enable-nonfree --disable-debug
--enable-stripping --shlibdir=/usr/lib64 --enable-runtime-cpudetect
libavutil 56. 23.101 / 56. 23.101
libavcodec 58. 39.100 / 58. 39.100
libavformat 58. 22.100 / 58. 22.100
libavdevice 58. 6.100 / 58. 6.100
libavfilter 7. 43.100 / 7. 43.100
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.22.100
Duration: 00:02:00.04, start: 0.000000, bitrate: 4345 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
720x480 [SAR 8:9 DAR 4:3], 4148 kb/s, 23.98 fps, 23.98 tbr, 24k tbn,
47.95 tbc (default)
handler_name : VideoHandler
Stream #0:1(und): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, stereo,
fltp, 192 kb/s (default)
handler_name : SoundHandler
audio service type: main
Thanks for any help.

DVDs have bitmap-type subtitles. To watch it on a standard MP4 file you'll
need to OCR it to a text-type subtitle format (a thing that ffmpeg doesn't
do as far as I know) or burn them on the video track. This last one can be
made with ffmpeg using filters, as explained in
https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo
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sean darcy

2018-11-21 21:57:49 UTC

Permalink

Post by Micael Silva

Correct, they are picture-based bitmapped title. But they can be copied
to output. Just get a VOB that has bitmapped subtitles, and use -c:s
copy. BTW, almost all commercial DVDs have bitmapped subtitles.

Here the problem is that the subtitle stream doesn't start until 85 sec
into the movie. A solution should be -analyzeduration and -probesize.
And in fact that works .... but only with ffprobe !

ffprobe -i VTS_01_1.VOB -probesize 100M -analyzeduration 100M
,,,,,,,,,,,,
Input #0, mpeg, from 'VTS_01_1.VOB':
Duration: 00:29:44.30, start: 0.045500, bitrate: 4814 kb/s
Stream #0:0[0x1bf]: Data: dvd_nav_packet
Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv,
progressive), 720x480 [SAR 8:9 DAR 4:3], Closed Captions, 29.92 fps,
59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:3[0x21]: Subtitle: dvd_subtitle
Stream #0:4[0x20]: Subtitle: dvd_subtitle

Not with ffmpeg:

ffmpeg -i VTS_01_1.VOB -probesize 500M -analyzeduration 500M -f null
/dev/null
ffmpeg version git-snapshot-20181112-RPMFusion Copyright (c) 2000-2018
................
Input #0, mpeg, from 'VTS_01_1.VOB':
Duration: 00:29:44.30, start: 0.045500, bitrate: 4814 kb/s
Stream #0:0[0x1bf]: Data: dvd_nav_packet
Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv,
progressive), 720x480 [SAR 8:9 DAR 4:3], Closed Captions, 29.33 fps,
59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream mapping:
Stream #0:1 -> #0:0 (mpeg2video (native) -> wrapped_avframe (native))
Stream #0:2 -> #0:1 (ac3 (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Output #0, null, to '/dev/null':
Metadata:
encoder : Lavf58.22.100
Stream #0:0: Video: wrapped_avframe, yuv420p(progressive), 720x480
[SAR 8:9 DAR 4:3], q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
Metadata:
encoder : Lavc58.39.100 wrapped_avframe
Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Metadata:
encoder : Lavc58.39.100 pcm_s16le

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Carl Eugen Hoyos

2018-11-21 22:00:57 UTC

Permalink

Post by sean darcy
I have a 1949 french movie. I need the subtitles, my french isn't good
enough any more !
The problem is that the subtitles stream doesn't start until 85 seconds
into the movie.

Use -probesize and -analyzeduration with *really* big numbers.

Carl Eugen
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sean darcy

2018-11-21 22:13:08 UTC

Permalink

Post by Carl Eugen Hoyos

Post by sean darcy
I have a 1949 french movie. I need the subtitles, my french isn't good
enough any more !
The problem is that the subtitles stream doesn't start until 85 seconds
into the movie.

Use -probesize and -analyzeduration with *really* big numbers.
Carl Eugen

See my post just before this. ffprobe found the subtitle streams, but
ffmpeg didn't , even with 5 x numbers. I even tried 10G.

Is my test command wrong somehow:

ffmpeg -i VTS_01_1.VOB -probesize 10G -analyzeduration 10G -f null
/dev/null

Thanks for any help.

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sean darcy

2018-11-21 22:17:49 UTC

Permalink

Post by sean darcy

Post by Carl Eugen Hoyos

Post by sean darcy
I have a 1949 french movie. I need the subtitles, my french isn't good
enough any more !
The problem is that the subtitles stream doesn't start until 85 seconds
into the movie.

Use -probesize and -analyzeduration with *really* big numbers.
Carl Eugen

See my post just before this. ffprobe found the subtitle streams, but
ffmpeg didn't , even with 5 x numbers. I even tried 10G.
ffmpeg -i VTS_01_1.VOB -probesize 10G -analyzeduration 10G -f null
/dev/null
Thanks for any help.

I'm getting stupider by the hour. This works fine:

ffmpeg -probesize 100M -analyzeduration 100M -i VTS_01_1.VOB .........

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