Muxing together a .ts file and a sub file causes playback issues in video

[Meta83]

So I have a .ts file and a converted .dvb sub file (.SRT TO .DVB) that I want to mux togheter using FFMPEG (latest version). The mux is a success and the file plays fine in VLC or other modern divce.However I have an older divce (around 10 yeras old) where playback has issues, whenever a line of subs is displayd the picture and and audio gets corrupted and frezzes up and as sson there are no lins everything looks good again and so on. Note that subs are displayd correctly and they are not affected by the issue, only picture and audio is.

I have tried using diffrent command without any luck but here is the most basic command that should work:

ffmpeg -i <video file> -i <DVB file> -f mpegts -c:v copy -c:a copy -c:s copy -copyts <output file>

Here is the output I get frome FFMPEG:

ffmpeg version 7.0-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg developers
  built with gcc 13.2.0 (Rev5, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libxevd --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
  libavutil      59.  8.100 / 59.  8.100
  libavcodec     61.  3.100 / 61.  3.100
  libavformat    61.  1.100 / 61.  1.100
  libavdevice    61.  1.100 / 61.  1.100
  libavfilter    10.  1.100 / 10.  1.100
  libswscale      8.  1.100 /  8.  1.100
  libswresample   5.  1.100 /  5.  1.100
  libpostproc    58.  1.100 / 58.  1.100
[mpegts @ 0000029209341000] stream 0 : no PTS found at end of file, duration not set
Input #0, mpegts, from '\Tests\video.ts':
  Duration: 00:28:52.06, start: 0.980000, bitrate: 4992 kb/s
  Program 1
  Stream #0:0[0x1e1]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn
  Stream #0:1[0x1e2](swe): Audio: mp2 (mp3float) ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 192 kb/s
Input #1, mpegts, from 'ENG.dvb':
  Duration: 00:28:09.88, start: 0.160000, bitrate: 8 kb/s
  Program 1
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #1:0[0x100](eng): Subtitle: dvb_subtitle (dvbsub) ([6][0][0][0] / 0x0006)
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
  Stream #1:0 -> #0:2 (copy)
Output #0, mpegts, to '\Tests\20735799_muxed.ts':
  Metadata:
    encoder         : Lavf61.1.100
  Stream #0:0: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 90k tbn
  Stream #0:1(swe): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 192 kb/s
  Stream #0:2(swe): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
Press [q] to stop, [?] for help
[out#0/mpegts @ 000002920a155380] video:951379KiB audio:40595KiB subtitle:1389KiB other streams:0KiB global headers:0KiB muxing overhead: 3.385295%
size= 1026992KiB time=00:27:25.74 bitrate=5112.1kbits/s speed=75.3x

Can anyone help me out? I'm I missing something that is needed for older divaces (divece in question is a Samsung SMT-S5140 STB). Thx!

[ProWo]

Retry with

ffmpeg -i <video file> -i <DVB file> -c:v copy -c:a copy -c:s copy <output file>

You could also try mp4 or mkv as container, instead of ts.

[Meta83]

Hi @ProWo,

Didn't help, same result as before.

I can add if I take a x.ts file that is playing fine on the old divce and just run it in FFMPEG with command below it will end up in same result, not playing well. So somthing FFMEPG does during the copy that is causing the issue.

ffmpeg -i <video file> -i <DVB file> -c copy <output file>

[ProWo]

Dvd subs are normally split into 2 files, an idx and a sub file.
Try loading the idx file at <DVB file>.

[Meta83]

Subfile I have is a converted .srt into a mpeg-ts stream (compatibel with FFMPEG) with .dvb extention. I use a dedicated softwere for this conversion. So then I use FFMPEG to mux the files togheter. But I have also tryd using Subtitle Edit to convert det the .srt file to a idx and sub file but the oucome is the same.

I have a friend that has access to Telestream Vantige (https://www.telestream.net/vantage/overview.htm) and when he mux the files togehetr the file is playing fine. So I am woundering what is FFMPEG doing that makes the file unplayable on the device.

Added an image of how it looks like when its played on the divece and a line is dipslayed:

[Attachment 78890 - Click to enlarge]

[ProWo]

Have you tried mp4 instead of ts with the old device?

[Meta83]

The device in question only supports .ts unfortunately. I'm currios why same files that are muxed with Telestream Vantage works but not with FFMPEG. Must be some settinge in FFMPEG that i'm missing.

If I analyze the working file from Telestream Vantage and FFMPEG the main diffrence I can see is that Vantig: One audio frame in One PES Packet and FFMPEG: Five audio frames in One PES Packet. Could this be the issue? How do I set how manny frames there should be in one PES packet in FFMPEG?

[ProWo]

I would suggest to add the dvdsub to mkv first and then remux the mkv to ts.

[Meta83]

I tried it that way and got same result.

First:

ffmpeg -i VideoAudioFile.ts -i DVBfile.dvb -c:v copy -c:a copy -c:s copy -copyts outputfile.mkv

Then:

ffmpeg -i VideoAudioFile.mkv -map 0 -c copy outputfile.ts

[ProWo]

Another way.
Convert the DVD Subtitle to BR-PGS (sup) with BDSup2Sub, the mux the created sup file to ts with tsmuxer.

[Meta83]

Unfortunately that does not help me, file needs to be .ts with DVB sub.

[Meta83]

ok, so I found a command that almoste works

ffmpeg -i <video file> -i <DVB file> -map 0 -map 1 -flags +global_header -c:v libx264 -c:a copy -c:s copy -f tee "[bsfs/v=dump_extra=freq=keyframe]" -copyts <output file>

But now the Audio is dropping out here and there, do you know what could be causing it?