Re: Burn caption into video

On Tue, 15 Oct 2024 13:24:16 -0400, Paul <nospam@needed.invalid> wrote

ffmpeg -i sample_video_ffmpeg.mp4 -vf subtitles=sample_video_subtitle_ffmpeg.srt output_srt.mp4
 That seems to be missing a -c copy, but maybe all the tracks will be there.
 Using something like ffprobe.exe afterwards on output_srt.mp4 , should
indicate whether an additional new track is present.

Using the simple ten second video clip shot from my phone and this simple hand-crafted SRT file, the suggested command worked (almost) perfectly.   ====================
1
00:00:05,000 --> 00:00:07,000
This is line 1.
This is line 2.
  ====================
ffmpeg -i test.mp4 -vf subtitles=test.srt merged.mp4
ffprobe merged.mp4
move test.srt test.bak
  ====================
Thanks to your suggested ffmpeg melding of files command,
(most of) the SRT was hard coded merged into the video.
The only thing that didn't work is line 2 never showed up.
But I don't care about that as a line is enough to prove it works.
BTW, I have no idea what you mean by "all the tracks" but I did run the suggested ffprobe command which output what you see below.
Did the ffprobe output indicate to you any possible missing tracks?
  ====================
ffmpeg -i test.mp4 -vf subtitles=test.srt merged.mp4
  ====================
ffmpeg version N-114515-gfa110c32b5-20240329 Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 13.2.0 (crosstool-NG 1.26.0.65_ecc5e41)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32-    --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-shared --disable-static --disable-w32threads
   --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma    --enable-fontconfig --enable-libharfbuzz --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb    --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-chromaprint --enable-libdav1d    --enable-libdavs2 --enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r    --enable-libgme --enable-libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame    --enable-libopus --enable-librist --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libvpl    --enable-openal --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt    --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1    --enable-libtwolame --enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc    --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi    --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-libs=-lgomp --extra-ldflags=-pthread --extra-ldexeflags=    --cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++ --ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib    --nm=x86_64-w64-mingw32-gcc-nm --extra-version=20240329   libavutil      59. 10.100 / 59. 10.100
  libavcodec     61.  4.100 / 61.  4.100
  libavformat    61.  2.100 / 61.  2.100
  libavdevice    61.  2.100 / 61.  2.100
  libavfilter    10.  2.100 / 10.  2.100
  libswscale      8.  2.100 /  8.  2.100
  libswresample   5.  2.100 /  5.  2.100
  libpostproc    58.  2.100 / 58.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 0
    compatible_brands: mp41avc1
    creation_time   : 2024-10-15T06:44:53.000000Z
    encoder         : vlc 3.0.20 stream output
    encoder-eng     : vlc 3.0.20 stream output
  Duration: 00:00:06.23, start: 0.000000, bitrate: 14964 kb/s
  Stream #0:0[0x1](eng): Audio: mp3 (mp3float) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
      Metadata:
        creation_time   : 2024-10-15T06:44:53.000000Z
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 14827 kb/s, 30.17 fps, 30 tbr, 1000k tbn (default)
      Metadata:
        creation_time   : 2024-10-15T06:44:53.000000Z
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
      Side data:
        displaymatrix: rotation of -90.00 degrees
[Parsed_subtitles_0 @ 0000025597957c00] libass API version: 0x1701000
[Parsed_subtitles_0 @ 0000025597957c00] libass source: commit: 649a7c2e1fc6f4188ea1a89968560715800b883d-dirty
[Parsed_subtitles_0 @ 0000025597957c00] Shaper: FriBidi 1.0.13 (SIMPLE) HarfBuzz-ng 8.3.1 (COMPLEX)
[Parsed_subtitles_0 @ 0000025597957c00] Using font provider directwrite (with GDI)
[Parsed_subtitles_0 @ 0000025597957c00] libass wasn't built with ASS_FEATURE_WRAP_UNICODE support
Stream mapping:
  Stream #0:1 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:0 -> #0:1 (mp3 (mp3float) -> aac (native))
Press [q] to stop, [?] for help
[Parsed_subtitles_0 @ 0000025597955800] libass API version: 0x1701000
[Parsed_subtitles_0 @ 0000025597955800] libass source: commit: 649a7c2e1fc6f4188ea1a89968560715800b883d-dirty
[Parsed_subtitles_0 @ 0000025597955800] Shaper: FriBidi 1.0.13 (SIMPLE) HarfBuzz-ng 8.3.1 (COMPLEX)
[Parsed_subtitles_0 @ 0000025597955800] Using font provider directwrite (with GDI)
[Parsed_subtitles_0 @ 0000025597955800] libass wasn't built with ASS_FEATURE_WRAP_UNICODE support
[libx264 @ 0000025597949c00] using SAR=1/1
[libx264 @ 0000025597949c00] using cpu capabilities: MMX2 SSE2Fast LZCNT
[libx264 @ 0000025597949c00] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0000025597949c00] 264 - core 164 - H.264/MPEG-4 AVC codec - Copyleft 2003-2024 - 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=6 lookahead_threads=1 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=25 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 'merged.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 0
    compatible_brands: mp41avc1
    encoder         : Lavf61.2.100
  Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1080x1920 [SAR 1:1 DAR 9:16], q=2-31, 30 fps, 15360 tbn (default)
      Metadata:
        creation_time   : 2024-10-15T06:44:53.000000Z
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc61.4.100 libx264
      Side data:
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
      Metadata:
        creation_time   : 2024-10-15T06:44:53.000000Z
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc61.4.100 aac
[Parsed_subtitles_0 @ 0000025597955800] fontselect: (Arial, 400, 0) -> ArialMT, 0, ArialMTdrop=0 speed=0.171x
[out#0/mp4 @ 00000255978eed00] video:11219KiB audio:102KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.081056%
frame=  189 fps=6.0 q=-1.0 Lsize=   11329KiB time=00:00:06.20 bitrate=14960.4kbits/s dup=1 drop=0 speed=0.196x
[libx264 @ 0000025597949c00] frame I:5     Avg QP:22.96  size: 94847
[libx264 @ 0000025597949c00] frame P:52    Avg QP:25.76  size: 67137
[libx264 @ 0000025597949c00] frame B:132   Avg QP:26.43  size: 56983
[libx264 @ 0000025597949c00] consecutive B-frames:  6.3%  1.1%  1.6% 91.0%
[libx264 @ 0000025597949c00] mb I  I16..4: 17.9% 66.7% 15.4%
[libx264 @ 0000025597949c00] mb P  I16..4: 10.8% 57.5%  8.8%  P16..4: 13.8%  3.5%  1.1%  0.0%  0.0%    skip: 4.5%
[libx264 @ 0000025597949c00] mb B  I16..4:  5.7% 31.9%  6.5%  B16..8: 26.3%  9.0%  1.6%  direct: 3.6%  skip:15.5%  L0:53.8% L1:40.2% BI: 6.1%
[libx264 @ 0000025597949c00] 8x8 transform intra:72.9% inter:83.4%
[libx264 @ 0000025597949c00] coded y,uvDC,uvAC intra: 60.5% 46.3% 8.0% inter: 26.1% 30.2% 0.9%
[libx264 @ 0000025597949c00] i16 v,h,dc,p: 30% 28% 13% 29%
[libx264 @ 0000025597949c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 18% 19%  6%  8%  8%  8%  8%  9%
[libx264 @ 0000025597949c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 19% 13%  6% 11%  9% 10%  6%  7%
[libx264 @ 0000025597949c00] i8c dc,h,v,p: 55% 20% 22%  4%
[libx264 @ 0000025597949c00] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0000025597949c00] ref P L0: 56.6%  7.6% 20.0% 15.8%
[libx264 @ 0000025597949c00] ref B L0: 86.1% 10.1%  3.9%
[libx264 @ 0000025597949c00] ref B L1: 94.3%  5.7%
[libx264 @ 0000025597949c00] kb/s:14586.81
[aac @ 0000025599caa040] Qavg: 1098.128
  ====================
ffprobe.exe merged.mp4
  ====================
ffprobe version N-114515-gfa110c32b5-20240329 Copyright (c) 2007-2024 the FFmpeg developers
  built with gcc 13.2.0 (crosstool-NG 1.26.0.65_ecc5e41)
  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32-    --arch=x86_64 --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug --enable-shared --disable-static --disable-w32threads     --enable-pthreads --enable-iconv --enable-libxml2 --enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp --enable-lzma    --enable-fontconfig --enable-libharfbuzz --enable-libvorbis --enable-opencl --disable-libpulse --enable-libvmaf --disable-libxcb    --disable-xlib --enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth --enable-chromaprint --enable-libdav1d    --enable-libdavs2 --enable-libdvdread --enable-libdvdnav --disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r    --enable-libgme --enable-libkvazaar --enable-libaribcaption --enable-libass --enable-libbluray --enable-libjxl --enable-libmp3lame    --enable-libopus --enable-librist --enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp --enable-lv2 --enable-libvpl    --enable-openal --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopenmpt    --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt --enable-libsvtav1    --enable-libtwolame --enable-libuavs3d --disable-libdrm --enable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc    --enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libzimg --enable-libzvbi    --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags= --extra-libs=-lgomp --extra-ldflags=-pthread --extra-ldexeflags=    --cc=x86_64-w64-mingw32-gcc --cxx=x86_64-w64-mingw32-g++ --ar=x86_64-w64-mingw32-gcc-ar --ranlib=x86_64-w64-mingw32-gcc-ranlib    --nm=x86_64-w64-mingw32-gcc-nm --extra-version=20240329
  libavutil      59. 10.100 / 59. 10.100
  libavcodec     61.  4.100 / 61.  4.100
  libavformat    61.  2.100 / 61.  2.100
  libavdevice    61.  2.100 / 61.  2.100
  libavfilter    10.  2.100 / 10.  2.100
  libswscale      8.  2.100 /  8.  2.100
  libswresample   5.  2.100 /  5.  2.100
  libpostproc    58.  2.100 / 58.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'merged.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf61.2.100
  Duration: 00:00:06.30, start: 0.000000, bitrate: 14731 kb/s
  Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1080x1920 [SAR 1:1 DAR 9:16], 14587 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
      Metadata:
        handler_name    : VideoHandler
        vendor_id       : [0][0][0][0]
        encoder         : Lavc61.4.100 libx264
  Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 134 kb/s (default)
      Metadata:
        handler_name    : SoundHandler
        vendor_id       : [0][0][0][0]
  ====================