How to compile on linux?

[shmu26]

I didn't see a .deb file available for download, so I downloaded the source code.
In the README I don't see instructions how to compile and install.
So I ask: how to compile and install, on Ubuntu?

[mifi]

See .github/workflows/build.yml and https://github.com/mifi/lossless-cut/blob/master/developer-notes.md

[graemev]

I had a similar issue. I'd already found the developer notes, but:

$ pwd
/home/graeme/src.foreign/LosslessCut/lossless-cut-3.54.0

$ ls
LICENSE				    entitlements.mas.plist     ms-store-badge.svg		test-manual
README.md			    i18next-parser.config.mjs  no.mifi.losslesscut.appdata.xml	tracks_screenshot.jpg
_config.yml			    import-export.md	       no.mifi.losslesscut.desktop	translation.md
cli.md				    index.html		       package.json			vite.config.js
developer-notes.md		    issues.md		       public				yarn.lock
entitlements.mas.inherit.plist	    mac-app-store-badge.svg    script
entitlements.mas.loginhelper.plist  main_screenshot.jpg        src
graeme@real:~/src.foreign/LosslessCut/lossless-cut-3.54.0$ yarn
ERROR: There are no scenarios; must have at least one.

This should not be a surprise because:

$ man yarn
WARNING: terminal is not fully functional
Press RETURN to continue 

YARN(1)                                               General Commands Manual                                              YARN(1)

NAME
       yarn - scenario testing of Unix command line tools

SYNOPSIS
       yarn  [--allow-missing-steps]  [--no-allow-missing-steps]  [--cd-datadir] [--no-cd-datadir] [--config=FILE] [--dump-config]
       [--dump-setting-names]  [--generate-manpage=TEMPLATE]  [-h]   [--help]   [--help-all]   [--list-config-files]   [--version]
       [--no-default-configs]  [--dump-memory-profile=METHOD]  [--env=NAME=VALUE]  [--log=FILE] [--log-keep=N] [--log-level=LEVEL]
       [--log-max=SIZE]   [--log-mode=MODE]   [--memory-dump-interval=SECONDS]   [--output=FILE]   [-q]   [--quiet]   [--no-quiet]
       [--require-assumptions]   [--no-require-assumptions]   [-rSCENARIO]   [--run=SCENARIO]   [--shell=SHELL]  [--shell-arg=ARG]
       [-sSHELL-LIBRARY]      [--shell-library=SHELL-LIBRARY]      [--snapshot]       [--no-snapshot]       [--stop-on-first-fail]
       [--no-stop-on-first-fail]  [--tempdir=DIR]  [--timings]  [--no-timings]  [-v]  [--verbose]  [--no-verbose]  [-n] [--no-act]
       [--dry-run] [--pretend] [--no-no-act] [--no-dry-run] [--no-pretend] [FILE]..

Feels like there is another tool also called yarn?

[mifi]

https://yarnpkg.com/

[graemev]

OK, this is starting to feel like "boiling the ocean"

LosslessCut requires --> https://yarnpkg.com/ (not yarn in standard repos)
yarn (non standard one) requires "Corepack" also not in the standard repos.

Corepack is https://nodejs.org/dist/latest/docs/api/corepack.html, and does not seem to have any install/build instructions.

I did try the "binary" version, but that only works for some videos .. so I'm guessing a "versions issue".

An error has occurred.
Command was killed with SIGSEGV (Segmentation fault):

/home/graeme/bin/LosslessCut-linux-x64/resources/ffprobe -of json -show_chapters -show_format -show_entries stream -i /home/graeme/Videos/Lossless/Family_Guy_S08-E03_Spies_Reminiscent_of_Us-00.00.31.901-00.12.43.640-seg1 -hide_banner

Running using "standard" ffprobe

graeme@real:~/src.foreign$ ffprobe -version
ffprobe version 6.0-4 Copyright (c) 2007-2023 the FFmpeg developers
built with gcc 13 (Debian 13.1.0-9)
configuration: --prefix=/usr --extra-version=4 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libvpl --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
libavutil      58.  2.100 / 58.  2.100
libavcodec     60.  3.100 / 60.  3.100
libavformat    60.  3.100 / 60.  3.100
libavdevice    60.  1.100 / 60.  1.100
libavfilter     9.  3.100 /  9.  3.100
libswscale      7.  1.100 /  7.  1.100
libswresample   4. 10.100 /  4. 10.100
libpostproc    57.  1.100 / 57.  1.100


graeme@real:~/src.foreign$ ffprobe -of json -show_chapters -show_format -show_entries stream -i /home/graeme/Videos/Lossless/Family_Guy_S08-E03_Spies_Reminiscent_of_Us-00.00.31.901-00.12.43.640-seg1 -hide_banner
{
Input #0, mpegts, from '/home/graeme/Videos/Lossless/Family_Guy_S08-E03_Spies_Reminiscent_of_Us-00.00.31.901-00.12.43.640-seg1':
  Duration: 00:12:12.14, start: 1.400000, bitrate: 1486 kb/s
  Program 1 
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
  Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x576 [SAR 12:11 DAR 4:3], 25 fps, 25 tbr, 90k tbn
    Side data:
      cpb: bitrate max/min/avg: 15000000/0/0 buffer size: 1835008 vbv_delay: N/A
  Stream #0:1[0x101](NAR): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 128 kb/s
  Stream #0:2[0x102](eng): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, fltp, 160 kb/s
  Stream #0:3[0x103](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
    "programs": [
        {
            "streams": [
                {
                    "index": 0,
                    "codec_name": "mpeg2video",
                    "codec_long_name": "MPEG-2 video",
                    "profile": "Main",
                    "codec_type": "video",
                    "codec_tag_string": "[2][0][0][0]",
                    "codec_tag": "0x0002",
                    "width": 704,
                    "height": 576,
                    "coded_width": 0,
                    "coded_height": 0,
                    "closed_captions": 0,
                    "film_grain": 0,
                    "has_b_frames": 1,
                    "sample_aspect_ratio": "12:11",
                    "display_aspect_ratio": "4:3",
                    "pix_fmt": "yuv420p",
                    "level": 8,
                    "color_range": "tv",
                    "chroma_location": "left",
                    "field_order": "tt",
                    "refs": 1,
                    "id": "0x100",
                    "r_frame_rate": "25/1",
                    "avg_frame_rate": "25/1",
                    "time_base": "1/90000",
                    "start_pts": 167806,
                    "start_time": "1.864511",
                    "duration_ts": 65851200,
                    "duration": "731.680000",
                    "extradata_size": 150,
                    "disposition": {
                        "default": 0,
                        "dub": 0,
                        "original": 0,
                        "comment": 0,
                        "lyrics": 0,
                        "karaoke": 0,
                        "forced": 0,
                        "hearing_impaired": 0,
                        "visual_impaired": 0,
                        "clean_effects": 0,
                        "attached_pic": 0,
                        "timed_thumbnails": 0,
                        "captions": 0,
                        "descriptions": 0,
                        "metadata": 0,
                        "dependent": 0,
                        "still_image": 0
                    },
                    "side_data_list": [
                        {
                            "side_data_type": "CPB properties",
                            "max_bitrate": 15000000,
                            "min_bitrate": 0,
                            "avg_bitrate": 0,
                            "buffer_size": 1835008,
                            "vbv_delay": -1
                        }
                    ]
                },
                {
                    "index": 1,
                    "codec_name": "mp2",
                    "codec_long_name": "MP2 (MPEG audio layer 2)",
                    "codec_type": "audio",
                    "codec_tag_string": "[3][0][0][0]",
                    "codec_tag": "0x0003",
                    "sample_fmt": "fltp",
                    "sample_rate": "48000",
                    "channels": 2,
                    "channel_layout": "stereo",
                    "bits_per_sample": 0,
                    "initial_padding": 0,
                    "id": "0x101",
                    "r_frame_rate": "0/0",
                    "avg_frame_rate": "0/0",
                    "time_base": "1/90000",
                    "start_pts": 136800,
                    "start_time": "1.520000",
                    "duration_ts": 65864880,
                    "duration": "731.832000",
                    "bit_rate": "128000",
                    "disposition": {
                        "default": 0,
                        "dub": 0,
                        "original": 0,
                        "comment": 0,
                        "lyrics": 0,
                        "karaoke": 0,
                        "forced": 0,
                        "hearing_impaired": 0,
                        "visual_impaired": 0,
                        "clean_effects": 0,
                        "attached_pic": 0,
                        "timed_thumbnails": 0,
                        "captions": 0,
                        "descriptions": 0,
                        "metadata": 0,
                        "dependent": 0,
                        "still_image": 0
                    },
                    "tags": {
                        "language": "NAR"
                    }
                },
                {
                    "index": 2,
                    "codec_name": "mp2",
                    "codec_long_name": "MP2 (MPEG audio layer 2)",
                    "codec_type": "audio",
                    "codec_tag_string": "[3][0][0][0]",
                    "codec_tag": "0x0003",
                    "sample_fmt": "fltp",
                    "sample_rate": "48000",
                    "channels": 2,
                    "channel_layout": "stereo",
                    "bits_per_sample": 0,
                    "initial_padding": 0,
                    "id": "0x102",
                    "r_frame_rate": "0/0",
                    "avg_frame_rate": "0/0",
                    "time_base": "1/90000",
                    "start_pts": 126000,
                    "start_time": "1.400000",
                    "duration_ts": 65877840,
                    "duration": "731.976000",
                    "bit_rate": "160000",
                    "disposition": {
                        "default": 0,
                        "dub": 0,
                        "original": 0,
                        "comment": 0,
                        "lyrics": 0,
                        "karaoke": 0,
                        "forced": 0,
                        "hearing_impaired": 0,
                        "visual_impaired": 0,
                        "clean_effects": 0,
                        "attached_pic": 0,
                        "timed_thumbnails": 0,
                        "captions": 0,
                        "descriptions": 0,
                        "metadata": 0,
                        "dependent": 0,
                        "still_image": 0
                    },
                    "tags": {
                        "language": "eng"
                    }
                },
                {
                    "index": 3,
                    "codec_name": "dvb_subtitle",
                    "codec_long_name": "DVB subtitles",
                    "codec_type": "subtitle",
                    "codec_tag_string": "[6][0][0][0]",
                    "codec_tag": "0x0006",
                    "id": "0x103",
                    "r_frame_rate": "0/0",
                    "avg_frame_rate": "0/0",
                    "time_base": "1/90000",
                    "start_pts": 445006,
                    "start_time": "4.944511",
                    "duration_ts": 65527200,
                    "duration": "728.080000",
                    "extradata_size": 5,
                    "disposition": {
                        "default": 0,
                        "dub": 0,
                        "original": 0,
                        "comment": 0,
                        "lyrics": 0,
                        "karaoke": 0,
                        "forced": 0,
                        "hearing_impaired": 0,
                        "visual_impaired": 0,
                        "clean_effects": 0,
                        "attached_pic": 0,
                        "timed_thumbnails": 0,
                        "captions": 0,
                        "descriptions": 0,
                        "metadata": 0,
                        "dependent": 0,
                        "still_image": 0
                    },
                    "tags": {
                        "language": "eng"
                    }
                }
            ]
        }
    ],
    "streams": [
        {
            "index": 0,
            "codec_name": "mpeg2video",
            "codec_long_name": "MPEG-2 video",
            "profile": "Main",
            "codec_type": "video",
            "codec_tag_string": "[2][0][0][0]",
            "codec_tag": "0x0002",
            "width": 704,
            "height": 576,
            "coded_width": 0,
            "coded_height": 0,
            "closed_captions": 0,
            "film_grain": 0,
            "has_b_frames": 1,
            "sample_aspect_ratio": "12:11",
            "display_aspect_ratio": "4:3",
            "pix_fmt": "yuv420p",
            "level": 8,
            "color_range": "tv",
            "chroma_location": "left",
            "field_order": "tt",
            "refs": 1,
            "id": "0x100",
            "r_frame_rate": "25/1",
            "avg_frame_rate": "25/1",
            "time_base": "1/90000",
            "start_pts": 167806,
            "start_time": "1.864511",
            "duration_ts": 65851200,
            "duration": "731.680000",
            "extradata_size": 150,
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            },
            "side_data_list": [
                {
                    "side_data_type": "CPB properties",
                    "max_bitrate": 15000000,
                    "min_bitrate": 0,
                    "avg_bitrate": 0,
                    "buffer_size": 1835008,
                    "vbv_delay": -1
                }
            ]
        },
        {
            "index": 1,
            "codec_name": "mp2",
            "codec_long_name": "MP2 (MPEG audio layer 2)",
            "codec_type": "audio",
            "codec_tag_string": "[3][0][0][0]",
            "codec_tag": "0x0003",
            "sample_fmt": "fltp",
            "sample_rate": "48000",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "initial_padding": 0,
            "id": "0x101",
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/90000",
            "start_pts": 136800,
            "start_time": "1.520000",
            "duration_ts": 65864880,
            "duration": "731.832000",
            "bit_rate": "128000",
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            },
            "tags": {
                "language": "NAR"
            }
        },
        {
            "index": 2,
            "codec_name": "mp2",
            "codec_long_name": "MP2 (MPEG audio layer 2)",
            "codec_type": "audio",
            "codec_tag_string": "[3][0][0][0]",
            "codec_tag": "0x0003",
            "sample_fmt": "fltp",
            "sample_rate": "48000",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "initial_padding": 0,
            "id": "0x102",
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/90000",
            "start_pts": 126000,
            "start_time": "1.400000",
            "duration_ts": 65877840,
            "duration": "731.976000",
            "bit_rate": "160000",
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            },
            "tags": {
                "language": "eng"
            }
        },
        {
            "index": 3,
            "codec_name": "dvb_subtitle",
            "codec_long_name": "DVB subtitles",
            "codec_type": "subtitle",
            "codec_tag_string": "[6][0][0][0]",
            "codec_tag": "0x0006",
            "id": "0x103",
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/90000",
            "start_pts": 445006,
            "start_time": "4.944511",
            "duration_ts": 65527200,
            "duration": "728.080000",
            "extradata_size": 5,
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            },
            "tags": {
                "language": "eng"
            }
        }
    ],
    "chapters": [

    ],
    "format": {
        "filename": "/home/graeme/Videos/Lossless/Family_Guy_S08-E03_Spies_Reminiscent_of_Us-00.00.31.901-00.12.43.640-seg1",
        "nb_streams": 4,
        "nb_programs": 1,
        "format_name": "mpegts",
        "format_long_name": "MPEG-TS (MPEG-2 Transport Stream)",
        "start_time": "1.400000",
        "duration": "732.144511",
        "size": "136023828",
        "bit_rate": "1486305",
        "probe_score": 50
    }
}

The version number reported by LosslessCut is 3.32.0

graeme@real:~/src.foreign$ LosslessCut-linux.AppImage --no-sandbox --version
(electron) The default value of app.allowRendererProcessReuse is deprecated, it is currently "false".  It will change to be "true" in Electron 9.  For more information please check https://github.com/electron/electron/issues/18397
Current version 3.32.0
Newest version 3.54.0

But this was installed from:

....-5.54.tar.bz2 downloaded from website

[mifi]

did you try to set a custom ffmpeg path under settings?

[graemev]

OK, feels like stealing a thread, as we're not long looking a source build. So just to finish off..

OK, I changed the path in settings to /usr/bin:

[ TL;DR It works with /usr/bin as the path ]

graeme@real:~/Videos/Lossless$ ls -l /usr/bin/ff*
-rwxr-xr-x 1 root root 326040 Jul 27 07:58 /usr/bin/ffmpeg
-rwxr-xr-x 1 root root 145816 Jul 27 07:58 /usr/bin/ffplay
-rwxr-xr-x 1 root root 187336 Jul 27 07:58 /usr/bin/ffprobe

graeme@real:~/Videos/Lossless$ /usr/bin/ffmpeg
ffmpeg version 6.0-4 Copyright (c) 2000-2023 the FFmpeg developers
built with gcc 13 (Debian 13.1.0-9)
configuration: --prefix=/usr --extra-version=4 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libvpl --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
libavutil 58. 2.100 / 58. 2.100
libavcodec 60. 3.100 / 60. 3.100
libavformat 60. 3.100 / 60. 3.100
libavdevice 60. 1.100 / 60. 1.100
libavfilter 9. 3.100 / 9. 3.100
libswscale 7. 1.100 / 7. 1.100
libswresample 4. 10.100 / 4. 10.100
libpostproc 57. 1.100 / 57. 1.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'
graeme@real:~/Videos/Lossless$ /usr/bin/ffprobe
ffprobe version 6.0-4 Copyright (c) 2007-2023 the FFmpeg developers
built with gcc 13 (Debian 13.1.0-9)
configuration: --prefix=/usr --extra-version=4 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-libjxl --enable-pocketsphinx --enable-librsvg --enable-libvpl --disable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
libavutil 58. 2.100 / 58. 2.100
libavcodec 60. 3.100 / 60. 3.100
libavformat 60. 3.100 / 60. 3.100
libavdevice 60. 1.100 / 60. 1.100
libavfilter 9. 3.100 / 9. 3.100
libswscale 7. 1.100 / 7. 1.100
libswresample 4. 10.100 / 4. 10.100
libpostproc 57. 1.100 / 57. 1.100
Simple multimedia streams analyzer
usage: ffprobe [OPTIONS] INPUT_FILE

1: I used the Tools-> Merge/Concatenate files:

Using the 2 -seg[12] files from the earlier attempt

This merged the files correctly (not actually what I wanted, as it used
the Audio-Description soundtrack, but that not relevant for this issue**)
So it works

2: Retry the full cut & merge (of course I may not be selecting the exact same
frames this time)
Failed using .mp4 container (unrelated, may be a non issue)
Worked using .mkv container

3: Try adding mp4+"Smart cut" err ... cannot find a keyframe after the cut point

4: mkv+keyframe works mkv without keyframe also works, mkv + smart cut fails, as above

** FYI The original input is a TS stream, recorded from broadcast TV. Lossless
reports it has 10 tracks (subtitles, Audio Description [AD] and many others)
and reduces this to 4. My TV always plays the first audio track (no options)
which is the AD track, so I tend to reduce to only 2 tracks.

[acklenx]

I just compiled from source on Linux Mint today. I already had node installed. But there were a ton of pre-requisites so it took while. Hopefully this helps.

LosslessCut Build Commands for Linux (Debian/Ubuntu)

1. Install Prerequisites
   LosslessCut requires Git, Node.js (with npm), the Yarn package manager (due to project dependencies using the patch: protocol), and standard build tools.

Update package list and install core tools

sudo apt update
sudo apt install git nodejs npm build-essential

Install Yarn globally (required for dependency patching)

npm install -g yarn

Install system FFmpeg (may be needed by other components)

sudo apt install ffmpeg

2. Clone and Prepare the Source Code

Clone the repository

git clone https://github.com/mifi/lossless-cut.git
cd lossless-cut

Install Node.js dependencies using Yarn

yarn install

3. Download and Package FFmpeg Binaries (Critical Step)
   The build process expects the FFmpeg binaries to be present in a specific folder so they can be bundled into the final application package.

Run the dedicated script to download and extract FFmpeg/FFprobe binaries. I didn't do this the first time since I already had ffmpeg (it's what I had been using), and since LosslessCut couldn't find, I had to install it here with yarn... and then rebuild the whole thing again :(

yarn download-ffmpeg-linux-x64

4. Run or Build the Application
   In theory you can either run it immediately in development mode (fastest way to test) or build the final installer package (which I did... twice)

Option A: Run in Development Mode (Fast Test)
If you just want to test if the build is working:

yarn start

Option B: Build the Final Installer Package (.deb)
This command performs the full build, including icon generation (yarn icon-gen) and Electron packaging (electron-builder).

This command runs the full build and creates Linux packages (includes .deb)

yarn pack-linux

5. Installation and Execution
   The final installer package will be in the dist/ directory. But there is also an unpacked directory/folder with an executable file. Run it!
   dist/linux-unpacked/losslesscut