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

Carl Eugen Hoyos ceffmpeg at gmail.com
Mon Feb 24 23:28:03 EET 2020


Am Mo., 24. Feb. 2020 um 13:56 Uhr schrieb Mark Filipak
<markfilipak.windows+ffmpeg at gmail.com>:
>
>
>
>
> 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.

Above email does not contain a question afaict.

Instead it still contains shouting.

(And please remove the ridiculous section breaks, this is not a thesis.)

If I should guess:
mpeg2video remuxing should work with -fflags +genpts (untested) and
you are still missing -map 0

Carl Eugen


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