[FFmpeg-user] Input: Transport stream with DVB subtitles, output: Any format with the subtitles burned in

[Carlos Fernandez]

Hi,


>From a BBC1 capture in TS format that comes with DVB subtitles I'm trying to generate a file that has the subtitles burned in. The final use case is a bit more complex in that it has to be live streams but let's forget about that for now.

A sample recording called BBC1.ts exists, and I want to create a file called BBC1_burned_in.avi that that the subtitles burned-in. The actual output format is not important, I'm using .avi here as that's what someone trying the same thing was using. Also tried generating a TS with no change.


Anyway, I'm using the following (tried other variants including scaling the subtitles, as someone suggested in IRC, all of them have the same result):


 ffmpeg -i BBC1_TS.ts -filter_complex "[0:v][0:s]overlay[v]" -map "[v]" -vcodec libx264 -preset ultrafast -x264opts keyint=100:min-keyint=50 -threads -0 -f avi BBC1_burned_in.avi


And I get an error "sub2video: rectangle overflowing" which appears a number of times.


This is the output:


$ ffmpeg -i BBC1_TS.ts -filter_complex "[0:v][0:s]overlay[v]" -map "[v]" -vcodec libx264 -preset ultrafast -x264opts keyint=100:min-keyint=50 -threads -0 -f avi copy.avi
ffmpeg version 2.5.10-0ubuntu0.15.04.1 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu13)
  configuration: --prefix=/usr --extra-version=0ubuntu0.15.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libwavpack --enable-libwebp --enable-libxvid --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libvpx --enable-libx264 --enable-libsoxr --enable-gnutls --enable-openal --enable-libopencv --enable-librtmp --enable-libx265
  libavutil      54. 15.100 / 54. 15.100
  libavcodec     56. 13.100 / 56. 13.100
  libavformat    56. 15.102 / 56. 15.102
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  2.103 /  5.  2.103
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mpegts, from 'BBC1_TS.ts':
  Duration: 00:02:24.43, start: 1.400000, bitrate: 1856 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 704x576 [SAR 16:11 DAR 16:9], max. 15000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x101](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s
    Stream #0:2[0x102](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
[mpegts @ 0x2394e80] sub2video: using 704x576 canvas
[libx264 @ 0x23c3f00] using SAR=16/11
[libx264 @ 0x23c3f00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
[libx264 @ 0x23c3f00] profile Constrained Baseline, level 3.0
Output #0, avi, to 'copy.avi':
  Metadata:
    ISFT            : Lavf56.15.102
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv420p, 704x576 [SAR 16:11 DAR 16:9], q=-1--1, 25 fps, 25 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc56.13.100 libx264
Stream mapping:
  Stream #0:0 (mpeg2video) -> overlay:main
  Stream #0:2 (dvbsub) -> overlay:overlay
  overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
sub2video: rectangle overflowing
    Last message repeated 1 times
sub2video: rectangle overflowing     711kB time=00:00:04.04 bitrate=1441.9kbits/s
    Last message repeated 2 times
sub2video: rectangle overflowing    2013kB time=00:00:13.00 bitrate=1268.3kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing    2769kB time=00:00:17.52 bitrate=1294.5kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing    3433kB time=00:00:21.88 bitrate=1285.4kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing    4112kB time=00:00:26.44 bitrate=1273.9kbits/s
sub2video: rectangle overflowing    4797kB time=00:00:30.96 bitrate=1269.3kbits/s
    Last message repeated 2 times
sub2video: rectangle overflowing    5385kB time=00:00:35.44 bitrate=1244.8kbits/s
sub2video: rectangle overflowing    6061kB time=00:00:40.12 bitrate=1237.6kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing    6610kB time=00:00:44.72 bitrate=1210.8kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing    7779kB time=00:00:53.80 bitrate=1184.4kbits/s
sub2video: rectangle overflowing    8448kB time=00:00:58.36 bitrate=1185.8kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing    9137kB time=00:01:03.00 bitrate=1188.0kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing    9795kB time=00:01:07.56 bitrate=1187.7kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing   10452kB time=00:01:11.92 bitrate=1190.6kbits/s
    Last message repeated 2 times
sub2video: rectangle overflowing   11248kB time=00:01:16.56 bitrate=1203.5kbits/s
sub2video: rectangle overflowing   12462kB time=00:01:25.92 bitrate=1188.2kbits/s
    Last message repeated 2 times
sub2video: rectangle overflowing   13119kB time=00:01:30.52 bitrate=1187.3kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing   13618kB time=00:01:35.20 bitrate=1171.8kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing   14442kB time=00:01:39.52 bitrate=1188.8kbits/s
    Last message repeated 2 times
sub2video: rectangle overflowing   15219kB time=00:01:43.92 bitrate=1199.7kbits/s
    Last message repeated 4 times
sub2video: rectangle overflowing   15861kB time=00:01:48.40 bitrate=1198.7kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing   16470kB time=00:01:53.04 bitrate=1193.6kbits/s
    Last message repeated 3 times
sub2video: rectangle overflowing   17082kB time=00:01:57.64 bitrate=1189.5kbits/s
    Last message repeated 1 times
sub2video: rectangle overflowing   18618kB time=00:02:06.60 bitrate=1204.7kbits/s
    Last message repeated 3 times
sub2video: rectangle overflowing   19832kB time=00:02:10.64 bitrate=1243.6kbits/s
    Last message repeated 3 times
sub2video: rectangle overflowing   21259kB time=00:02:15.04 bitrate=1289.7kbits/s
    Last message repeated 3 times
sub2video: rectangle overflowing   22038kB time=00:02:19.40 bitrate=1295.1kbits/s
    Last message repeated 2 times
frame= 3561 fps=224 q=-1.0 Lsize=   22532kB time=00:02:22.48 bitrate=1295.5kbits/s dup=0 drop=2
video:22442kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.404680%
[libx264 @ 0x23c3f00] frame I:36    Avg QP:17.08  size: 45801
[libx264 @ 0x23c3f00] frame P:3525  Avg QP:19.99  size:  6051
[libx264 @ 0x23c3f00] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x23c3f00] mb P  I16..4:  2.3%  0.0%  0.0%  P16..4: 42.0%  0.0%  0.0%  0.0%  0.0%    skip:55.7%
[libx264 @ 0x23c3f00] coded y,uvDC,uvAC intra: 53.4% 51.8% 18.9% inter: 18.4% 12.6% 0.6%
[libx264 @ 0x23c3f00] i16 v,h,dc,p: 53% 15% 16% 16%
[libx264 @ 0x23c3f00] i8c dc,h,v,p: 35% 14% 41%  9%
[libx264 @ 0x23c3f00] kb/s:1289.93

Thanks


Carlos