Flac duration

[hazerflac7]

When trimming flac files the duration doesn't get updated and remains as the original. Only happens with flac audio files.

[mifi]

please provide some more info, like report from the help menu

[tordenflesk]

Same issue here. Single FLAC, split into 8 files. All play back fine but have silence equal to the original file at the end.

General
Complete name                            : F:\Music\_Artists\Side Brok\_Kasetter\2011 - Pina D 4\01 - Side Brok - Program A.flac
Format                                   : FLAC
Format/Info                              : Free Lossless Audio Codec
File size                                : 164 MiB
Duration                                 : 23 min 47 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 962 kb/s
Album replay gain                        : -8.94 dB
Album replay gain peak                   : 0.997437
Album                                    : Pina D 4
Album/Performer                          : Pinadgreitt All-Stars
Track name                               : Program A
Track name/Position                      : 01
Performer                                : Side Brok
Recorded date                            : 2011
Cover                                    : Yes
Cover type                               : Cover (front)
Cover MIME                               : image/jpeg
COMPRESSION                              : 8

Audio
Format                                   : FLAC
Format/Info                              : Free Lossless Audio Codec
Duration                                 : 23 min 47 s
Bit rate mode                            : Variable
Bit rate                                 : 961 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 44.1 kHz
Bit depth                                : 16 bits
Compression mode                         : Lossless
Replay gain                              : -9.32 dB
Replay gain peak                         : 0.997040
Stream size                              : 164 MiB (100%)
Writing library                          : libFLAC 1.3.4 (UTC 2022-02-20)
MD5 of the unencoded content             : 29F8E2E80C7F51D71E4FFE957FBD1289

No error occurred.

{
  "state": {
    "filePath": "F:\\Music\\_Artists\\Side Brok\\_Kasetter\\2011 - Pina D 4\\01 - Side Brok - Program A.flac",
    "fileFormat": "flac",
    "externalFilesMeta": {},
    "mainStreams": [
      {
        "index": 0,
        "codec_name": "flac",
        "codec_long_name": "FLAC (Free Lossless Audio Codec)",
        "codec_type": "audio",
        "codec_tag_string": "[0][0][0][0]",
        "codec_tag": "0x0000",
        "sample_fmt": "s16",
        "sample_rate": "44100",
        "channels": 2,
        "channel_layout": "stereo",
        "bits_per_sample": 0,
        "r_frame_rate": "0/0",
        "avg_frame_rate": "0/0",
        "time_base": "1/44100",
        "start_pts": 0,
        "start_time": "0.000000",
        "duration_ts": 62961231,
        "duration": "1427.692313",
        "bits_per_raw_sample": "16",
        "extradata_size": 34,
        "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": "Replay Gain"
          }
        ]
      },
      {
        "index": 1,
        "codec_name": "mjpeg",
        "codec_long_name": "Motion JPEG",
        "profile": "Baseline",
        "codec_type": "video",
        "codec_tag_string": "[0][0][0][0]",
        "codec_tag": "0x0000",
        "width": 600,
        "height": 600,
        "coded_width": 600,
        "coded_height": 600,
        "closed_captions": 0,
        "film_grain": 0,
        "has_b_frames": 0,
        "sample_aspect_ratio": "1:1",
        "display_aspect_ratio": "1:1",
        "pix_fmt": "yuvj420p",
        "level": -99,
        "color_range": "pc",
        "color_space": "bt470bg",
        "chroma_location": "center",
        "refs": 1,
        "r_frame_rate": "90000/1",
        "avg_frame_rate": "0/0",
        "time_base": "1/90000",
        "start_pts": 0,
        "start_time": "0.000000",
        "duration_ts": 128492308,
        "duration": "1427.692311",
        "bits_per_raw_sample": "8",
        "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": 1,
          "timed_thumbnails": 0,
          "captions": 0,
          "descriptions": 0,
          "metadata": 0,
          "dependent": 0,
          "still_image": 0
        },
        "tags": {
          "comment": "Cover (front)"
        }
      }
    ],
    "copyStreamIdsByFile": {
      "F:\\Music\\_Artists\\Side Brok\\_Kasetter\\2011 - Pina D 4\\01 - Side Brok - Program A.flac": {
        "0": true,
        "1": true
      }
    },
    "cutSegments": [
      {
        "end": 264.3547814881926
      },
      {
        "start": 264.3547814881926,
        "end": 453.54166225706865
      },
      {
        "start": 453.54166225706865,
        "end": 648.1962045340167
      },
      {
        "start": 648.1962045340167,
        "end": 774.4420740575948
      },
      {
        "start": 774.4420740575948,
        "end": 869.8457104255934
      },
      {
        "start": 869.8457104255934,
        "end": 1094.5722339911622
      },
      {
        "start": 1094.5722339911622,
        "end": 1126.500282152672
      },
      {
        "start": 1126.500282152672
      }
    ],
    "mainFileFormatData": {
      "filename": "F:\\Music\\_Artists\\Side Brok\\_Kasetter\\2011 - Pina D 4\\01 - Side Brok - Program A.flac",
      "nb_streams": 2,
      "nb_programs": 0,
      "format_name": "flac",
      "format_long_name": "raw FLAC",
      "start_time": "0.000000",
      "duration": "1427.692313",
      "size": "171625543",
      "bit_rate": "961694",
      "probe_score": 100,
      "tags": {
        "Album": "Pina D 4",
        "Artist": "Side Brok",
        "Date": "2011",
        "Title": "Program A",
        "track": "01",
        "replaygain_album_gain": "-8.94 dB",
        "replaygain_album_peak": "0.997437",
        "replaygain_track_gain": "-9.32 dB",
        "replaygain_track_peak": "0.997040",
        "album_artist": "Pinadgreitt All-Stars",
        "COMPRESSION": "8"
      }
    },
    "rotation": 360,
    "shortestFlag": false,
    "effectiveExportMode": "separate"
  },
  "platform": "win32",
  "version": "3.46.2"
}

[tordenflesk]

re-encoding with ffmpeg reports:
ERROR: 2 consecutive FLAC__STREAM_DECODER_END_OF_STREAM events

[mifi]

Might be caused by the mjpeg track. try to disable it and see if it works

[mifi]

I edited my comment. basically it works with your short command because you're re-encoding, which is much slower than -copy

[Slavomir9]

@mifi My short command is lossless. FLAC is lossless format. FLAC work on different principle as losing audio formats (m4a, mp3 or Vorbis for example) on the same command. I use extremely old computer processor from 2007 and on my short command work extremely fast with low activity of processor

[mifi]

Technically lossless yes, but it’s not a stream copy, so if you have a large file it’s going to be slower than copy. But maybe we could still do it when cutting files that only have a single flac stream, because the alternative is a broken output flac file.

[mifi]

Created an issue #1809

[Slavomir9]

@mifi OK, thanks.
Yes. I tested the short command on mono (non-stereo files)

[slrslr]

Workaround ("sox" Linux utility - Slavomir9 mentioned it):

1. Export .flac file segments using LoslessCut. Btw. it exported with .mp4 extension despite "flac - raw FLAC" output format (container) was select, so i have renamed files to .flac. Resulting files are here if anyone is interested.
2. use Linux utility sox to merge segments: sox a01.flac a02.flac a03.flac a04.flac a.flac
   Resulting duration is correct, unlike using LosslessCut merging (where it shows duration of original file). File sizes are the same in both cases.