Can't seem to remux .TS files with ffmpeg

[CursedLemon]

Hey guys. You might remember me posting a thread or two here and there about using my El Gato Capture HD to record things and having a heck of a time with it, as it natively stores AVC files inside .ts containers which have proven to be a real pain to work with. Right now I'm trying to record some live sports events for archival purposes. The El Gato capture software (which is the only software that seems to read the 1080i input off my WOW! cable box correctly) stores the video as a single video stream along with multiple audio streams in a .ts file. I want to stream copy the files to .mkv using the video stream and the only relevant audio stream. The El Gato software does convert the captures to MP4, but it takes SO LONG for that transcode to happen, and I'd rather not transcode them at all if possible.

I've been trying to get better with ffmpeg lately. The command I'm using to try to make this happen is ffmpeg -i INPUT.ts -c:v copy -map 0:2 OUTPUT.mkv

This results in a file with audio only.

C:\Users\Cursed Lemon\Videos\EGC_Library\My Great Game - My Great Capture - 2019
-10-06 01-08-31>ffmpeg -i Recording_2019-10-06_01-08-31_0002.ts -c:v copy -map 0:2 test.mkv > test.txt
ffmpeg version N-95216-ge6625ca41f Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20190918
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --e
nable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus -
-enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --ena
ble-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enabl
e-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d1
1va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 35.100 / 56. 35.100
  libavcodec     58. 59.101 / 58. 59.101
  libavformat    58. 33.100 / 58. 33.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 61.100 /  7. 61.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[mpegts @ 000000000051fe80] DTS 6834658 < 6839163 out of order
[mpegts @ 000000000051fe80] Stream #1: not enough frames to estimate rate; consider increasing probesize
[mpegts @ 000000000051fe80] start time for stream 1 is not set in estimate_timings_from_pts
[mpegts @ 000000000051fe80] stream 1 : no TS found at start of file, duration not set
[mpegts @ 000000000051fe80] Could not find codec parameters for stream 1 (Video: mpeg2video ([2][0][0][0] / 0x0002), none(tv)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from 'Recording_2019-10-06_01-08-31_0002.ts':
  Duration: 00:00:18.23, start: 75.974011, bitrate: 34078 kb/s
  Program 2
    Stream #0:0[0x64]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr,
 90k tbn, 59.94 tbc
    Stream #0:1[0x66]: Video: mpeg2video ([2][0][0][0] / 0x0002), none(tv), 90k tbr, 90k tbn, 90k tbc
    Stream #0:2[0x67](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 234 kb/s
    Stream #0:3[0x69](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 224 kb/s
    Stream #0:4[0x3ec](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
    Stream #0:5[0x3f0](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 224 kb/s
    Stream #0:6[0x3f7](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
    Stream #0:7[0x65](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 234 kb/s
    Stream #0:8[0x3f3](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
    Stream #0:9[0x3eb](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
    Stream #0:10[0x3f5](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
    Stream #0:11[0x3ed](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
    Stream #0:12[0x3f1](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
    Stream #0:13[0x4e7](eng): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 217 kb/s
File 'test.mkv' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:2 -> #0:0 (aac (native) -> vorbis (libvorbis))
Press [q] to stop, [?] for help
Output #0, matroska, to 'test.mkv':
  Metadata:
    encoder         : Lavf58.33.100
    Stream #0:0(eng): Audio: vorbis (libvorbis) (oV[0][0] / 0x566F), 48000 Hz, stereo, fltp
    Metadata:
      encoder         : Lavc58.59.101 libvorbis
size=     220kB time=00:00:18.21 bitrate=  99.0kbits/s speed=9.74x
video:0kB audio:208kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 5.607529%

C:\Users\Cursed Lemon\Videos\EGC_Library\My Great Game - My Great Capture - 2019-10-06 01-08-31>

I've attached a MediaInfo dump of the input file in question, if that helps.

Do I need to do something special to these TS files before I can just remux them into matroska files?

[CursedLemon]

I think I just solved my problem, mostly. So I just used TSDoctor to demux the .ts file, which gave me a raw .264 file and an .aac file.

When I try to mux these files using FFMpeg, I am successful when muxing to MP4. However, when I try to mux to MKV, I get the following output:

C:\Users\Cursed Lemon\Desktop>ffmpeg -i Recording_2019-10-06_15-21-56_0011_PID_0064_.264 -i Recording_2019-10-06_15-21-56_0011_PID_0065_.aac -c copy t
est.mkv
ffmpeg version N-95216-ge6625ca41f Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20190918
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --e
nable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus -
-enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --ena
ble-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enabl
e-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d1
1va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 35.100 / 56. 35.100
  libavcodec     58. 59.101 / 58. 59.101
  libavformat    58. 33.100 / 58. 33.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 61.100 /  7. 61.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[h264 @ 00000000005a02c0] Stream #0: not enough frames to estimate rate; consider increasing probesize
Input #0, h264, from 'Recording_2019-10-06_15-21-56_0011_PID_0064_.264':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 1200k tbn, 59.94 tbc
[aac @ 0000000002a700c0] Estimating duration from bitrate, this may be inaccurate
Input #1, aac, from 'Recording_2019-10-06_15-21-56_0011_PID_0065_.aac':
  Duration: 00:00:23.20, bitrate: 197 kb/s
    Stream #1:0: Audio: aac (LC), 48000 Hz, stereo, fltp, 198 kb/s
File 'test.mkv' already exists. Overwrite? [y/N] y
Output #0, matroska, to 'test.mkv':
  Metadata:
    encoder         : Lavf58.33.100
    Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 29.97 tbr, 1k
 tbn, 1200k tbc
    Stream #0:1: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, stereo, fltp, 198 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
[matroska @ 0000000003191680] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to
set the timestamps properly
[matroska @ 0000000003191680] Can't write packet with unknown timestamp
av_interleaved_write_frame(): Invalid argument
frame=    1 fps=0.0 q=-1.0 Lsize=       2kB time=00:00:00.00 bitrate=N/A speed=N/A
video:89kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!

I guess I'd prefer to mux to MKV but I don't mind MP4. If anyone has an inkling as to why this is occurring, I'm all ears.

[jagabo]

The command I'm using to try to make this happen is ffmpeg -i INPUT.ts -c:v copy -map 0:2 OUTPUT.mkv

This results in a file with audio only.

You're telling it to remux only stream #2. "-c:v copy" is telling it to copy the video (rather than reencoded it) IF the video is included. But -map 2:0 is telling it to only include stream 2 (one of the audio streams) -- and it will be reencoded since you aren't specifying copy for the audio. The video is probably stream #0:

ffmpeg -i INPUT.ts -codec copy -map 0:0 -map 0:2 OUTPUT.mkv

[CursedLemon]

The command I'm using to try to make this happen is ffmpeg -i INPUT.ts -c:v copy -map 0:2 OUTPUT.mkv

This results in a file with audio only.

You're telling it to remux only stream #2. "-c:v copy" is telling it to copy the video (rather than reencoded it) IF the video is included. But -map 2:0 is telling it to only include stream 2 (one of the audio streams) -- and it will be reencoded since you aren't specifying copy for the audio. The video is probably stream #0:

ffmpeg -i INPUT.ts -codec copy -map 0:0 -map 0:2 OUTPUT.mkv

This works to include the video. However, the video for some reason is ending up as a sub-30 FPS copy, and I receive a string of the following errors all throughout the copy process:

[matroska @ 000000000316c4c0] Invalid DTS: 64014 PTS: 63964 in output stream 0:0, replacing by guess

When I try to remux to MP4, I receive this error instead:

[mp4 @ 000000000307c4c0] Non-monotonous DTS in output stream 0:0; previous: 15280767, current: 15280766; changing to 15280768. This may result in inco
rrect timestamps in the output file.

I suppose I'm good with the TSDoctor solution, I'm just curious as to why this is happening.

[netmask56]

If you have demuxed in TSDoctor then just pop the files into MKVToolNix. Doesn't re-encode same quality out same size. Takes minutes. You can actually wrap the TS file in a MKV container as well without demuxing. one step! However TSDoctor does cleanup any transmission errors so it's probably the best way to do it.