#10287 closed defect (invalid)
Trimming .FLAC files the duration doesn't get updated and remains as the input original
Reported by: | 456325 | Owned by: | |
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Priority: | normal | Component: | undetermined |
Version: | git-master | Keywords: | flac |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | no | |
Analyzed by developer: | no |
Description
Summary of the bug:
I am trying to cut out part of the flac audio file and the resulting file has full length of the original (wrong), though the file size is lower than original (good). Seeking in media player (for example MPV or VLC) beyond what was cut cause reset of the playback to beginning.
Input file: https://drive.proton.me/urls/HZ2J3EWZNG#8KQk7SA6sLfN
Command used to cut it:
$ ffmpeg -hide_banner -ss '111.17848' -i 'input.flac' -t '369.79157' -avoid_negative_ts make_zero -map '0:0' '-c:0' copy -map_metadata 0 -movflags '+faststart' -default_mode infer_no_subs -ignore_unknown -f flac -y 'output.flac'
$ ./ffmpeg -v 9 -loglevel 99 -i 'input.flac'
ffmpeg version N-65014-g7c130d6911-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2023 the FFmpeg developers built with gcc 8 (Debian 8.3.0-6) configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg libavutil 58. 3.100 / 58. 3.100 libavcodec 60. 6.101 / 60. 6.101 libavformat 60. 4.100 / 60. 4.100 libavdevice 60. 2.100 / 60. 2.100 libavfilter 9. 4.100 / 9. 4.100 libswscale 7. 2.100 / 7. 2.100 libswresample 4. 11.100 / 4. 11.100 libpostproc 57. 2.100 / 57. 2.100 Splitting the commandline. Reading option '-v' ... matched as option 'v' (set logging level) with argument '9'. Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '99'. Reading option '-i' ... matched as input url with argument 'input.flac'. Finished splitting the commandline. Parsing a group of options: global . Applying option v (set logging level) with argument 9. Successfully parsed a group of options. Parsing a group of options: input url input.flac. Successfully parsed a group of options. Opening an input file: input.flac. [NULL @ 0x7819ac0] Opening 'input.flac' for reading [file @ 0x781a2c0] Setting default whitelist 'file,crypto,data' Probing flac score:100 size:2048 [flac @ 0x7819ac0] Format flac probed with size=2048 and score=100 [flac @ 0x7819ac0] Before avformat_find_stream_info() pos: 9509 bytes read:32768 seeks:0 nb_streams:1 [flac @ 0x781ac80] sample/frame number mismatch in adjacent frames Last message repeated 20 times [flac @ 0x7819ac0] All info found [flac @ 0x7819ac0] stream 0: start_time: 0 duration: 561.75 [flac @ 0x7819ac0] format: start_time: 0 duration: 561.75 (estimate from stream) bitrate=935 kb/s [flac @ 0x7819ac0] After avformat_find_stream_info() pos: 60416 bytes read:65536 seeks:0 frames:1 Input #0, flac, from 'input.flac': Metadata: TITLE : redacted ARTIST : redacted ALBUM ARTIST : redacted album_artist : redacted ALBUM : redacted track : redacted PERFORMER : redacted COMMENT : redacted GENRE : redacted DATE : redacted COMPOSER : redacted ENSEMBLE : redacted RATING : redacted TOTALTRACKS : redacted Duration: 00:09:21.75, start: 0.000000, bitrate: 935 kb/s Stream #0:0, 1, 1/44100: Audio: flac, 44100 Hz, stereo, s16 Successfully opened the file. At least one output file must be specified [AVIOContext @ 0x7822700] Statistics: 65536 bytes read, 0 seeks
Change History (5)
comment:1 by , 14 months ago
comment:2 by , 14 months ago
Keywords: | FLAC removed |
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follow-up: 4 comment:3 by , 14 months ago
Resolution: | → invalid |
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Status: | new → closed |
-copy will also copy stream duration because its raw flac and not some higher level container/format.
comment:4 by , 14 months ago
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That is not a bug. -c copy cannot update the duration. It would not be a copy then, now would it.