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How to convert 2-channel DTS to FLAC on Linux command line

Hi
I need to convert DTS and PCM 2-Channel Audios to FLAC on Linux (command line) using FLAC 1.3.3 (not with in-built FLAC of ffmpeg).

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test $ ffmpeg -version
ffmpeg version 4.1.6-1~deb10u1 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)

test $ flac --version
flac 1.3.3
test $

So I tried various ways and all of them throw errors (even with "-s" option)

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ffmpeg -i Test.dts -f wav - | flac - -o Test.flac

ffmpeg -i title_t01.mkv -vn -map 0:a:0 -f wav - | flac -s --ignore-chunk-sizes -8 - -o title.flac

ffmpeg -i title_t01.mkv -vn -map 0:a:0 -f wav - | flac -8 - -o title.flac
Getting various errors like - (even with different compression levels)

Code: [Select]
WARNING: unexpected EOF; expected 1073741823 samples, got 549924864 samples
WARNING: skipping unknown chunk 'LIST' (use --keep-foreign-metadata to keep)
WARNING: 'data' chunk has non-zero size, using --ignore-chunk-sizes is probably a bad idea
Tried without ffmpeg -
Code: [Select]
test $   flac test1.dts -o test1_direct.flac

flac 1.3.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2016  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

ERROR: for encoding a raw file you must specify a value for --endian, --sign, --channels, --bps, and --sample-rate
Type "flac" for a usage summary or "flac --help" for all options
test $

Could anyone please advise proper CLI method on Linux?  Many thanks!!

Re: How to convert 2-channel DTS to FLAC on Linux command line

Reply #1
The "raw file" option for flac.exe is absolutely not what you want; that is for a "general purpose compressor" like 7-zip or winrar (i.e. not as an "audio codec"), so forget about that.

What do you get if you just ask ffmpeg to encode to wav or flac?
High Voltage socket-nose-avatar

Re: How to convert 2-channel DTS to FLAC on Linux command line

Reply #2
Try -f w64 instead of -f wav. Also try to add -map_metadata -1. And when reencoding lossy  dts try to add -c:a pcm_s24le or -c:a pcm_s16le

Re: How to convert 2-channel DTS to FLAC on Linux command line

Reply #3
I need to convert DTS
Are you converting DTS-HD MA, or one of the many lossy flavors of DTS? You could end up with a bigger file than the input audio if it's ordinary lossy DTS. That's fine if you're converting it for a player that doesn't support whichever flavor of DTS, but it doesn't make much sense otherwise.

using FLAC 1.3.3 (not with in-built FLAC of ffmpeg).
What's wrong with the built-in FLAC encoder in ffmpeg?

 
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