[FFmpeg-user] Concat filter with more than 1 audio stream -- How?

[Mark Filipak]

On 02/24/2020 06:46 AM, Carl Eugen Hoyos wrote:
> Am Mo., 24. Feb. 2020 um 12:22 Uhr schrieb Mark Filipak
> <markfilipak.windows+ffmpeg at gmail.com>:
> 
>> If I understand correctly, you think I should do this:
>>
>> copy /b
>> i:\VIDEO_TS\VTS_02_1.VOB+i:\VIDEO_TS\VTS_02_2.VOB+i:\VIDEO_TS\VTS_02_3.VOB+i:\VIDEO_TS\VTS_02_4.VOB+i:\VIDEO_TS\VTS_02_5.VOB
> 
> You should use "copy /b" if you want to concatenate mpeg streams.
> (This is what the command line you provided indicated. If you don't want
> to concatenate mpeg streams but produce mkv files, then above is of
> course irrelevant for you.)
> 
> If you need an mkv file, use ffmpeg -i concat:... ....mkv

Okay, you want me to try that form of concat.


EXAMPLE (from the wiki):
ffmpeg -i "concat:[_input_#1_]|[_input_#2_]|[_input_#3_]" -c copy output.ts

THIS WORKS FOR ME:
ffmpeg -i 
"concat:i:\VIDEO_TS\VTS_02_1.VOB|i:\VIDEO_TS\VTS_02_2.VOB|i:\VIDEO_TS\VTS_02_3.VOB|i:\VIDEO_TS\VTS_02_4.VOB|i:\VIDEO_TS\VTS_02_5.VOB" 
-c copy n:\output.ts

But I want an MKV, so I'll ignore that the '.ts' above has only 1 audio 
stream (which is the Isolated Score track) and I'll change'.ts' to 
'.mkv' as you recommend.


C:\CMD & tiny apps\ffmpeg>ffmpeg -i 
"concat:i:\VIDEO_TS\VTS_02_1.VOB|i:\VIDEO_TS\VTS_02_2.VOB|i:\VIDEO_TS\VTS_02_3.VOB|i:\VIDEO_TS\VTS_02_4.VOB|i:\VIDEO_TS\VTS_02_5.VOB" 
-c copy n:\output.mkv
ffmpeg version N-94664-g0821bc4eee Copyright (c) 2000-2019 the FFmpeg 
developers
   built with gcc 9.1.1 (GCC) 20190807
   configuration: --enable-gpl --enable-version3 --enable-sdl2 
--enable-fontconfig --enable-gnutls --enable-iconv --enable-libass 
--enable-libdav1d --enable-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 
--enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg 
--enable-lzma --enable-zlib --enable-gmp --enable-libvidstab 
--enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa 
--enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx 
--enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va 
--enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth 
--enable-libopenmpt
   libavutil      56. 33.100 / 56. 33.100
   libavcodec     58. 55.101 / 58. 55.101
   libavformat    58. 31.104 / 58. 31.104
   libavdevice    58.  9.100 / 58.  9.100
   libavfilter     7. 58.101 /  7. 58.101
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
Input #0, mpeg, from 
'concat:i:\VIDEO_TS\VTS_02_1.VOB|i:\VIDEO_TS\VTS_02_2.VOB|i:\VIDEO_TS\VTS_02_3.VOB|i:\VIDEO_TS\VTS_02_4.VOB|i:\VIDEO_TS\VTS_02_5.VOB':
   Duration: 01:43:54.21, start: 0.041500, bitrate: 6105 kb/s
     Stream #0:0[0x1bf]: Data: dvd_nav_packet
     Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top 
first), 720x480 [SAR 32:27 DAR 16:9], Closed Captions, 29.97 fps, 29.97 
tbr, 90k tbn, 59.94 tbc
     Stream #0:2[0x83]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
     Stream #0:3[0x82]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
     Stream #0:4[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
     Stream #0:5[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
File 'n:\output.mkv' already exists. Overwrite ? [y/N] y
Output #0, matroska, to 'n:\output.mkv':
   Metadata:
     encoder         : Lavf58.31.104
     Stream #0:0: Video: mpeg2video (Main) (mpg2 / 0x3267706D), 
yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], q=2-31, 29.97 fps, 
29.97 tbr, 1k tbn, 90k tbc
     Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, 5.1(side), 
fltp, 448 kb/s
Stream mapping:
   Stream #0:1 -> #0:0 (copy)
   Stream #0:2 -> #0:1 (copy)
Press [q] to stop, [?] for help
[matroska @ 000001df5ecb00c0] 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 @ 000001df5ecb00c0] Can't write packet with unknown timestamp
av_interleaved_write_frame(): Invalid argument
frame=    2 fps=0.0 q=-1.0 Lsize=      10kB time=00:00:00.00 
bitrate=83856.0kbits/s speed=1.02x
video:8kB audio:2kB subtitle:0kB other streams:0kB global headers:0kB 
muxing overhead: 6.697883%
Conversion failed!

> I am not sure if you already read the wiki article about concatenation
> in FFmpeg.

That's where I got the EXAMPLE.