[FFmpeg-trac] #4905(undetermined:new): Splitting a flac file using -ss and -t creates chunks with wrong duration
FFmpeg
trac at avcodec.org
Sun Oct 4 12:08:25 CEST 2015
#4905: Splitting a flac file using -ss and -t creates chunks with wrong duration
-------------------------------------+-------------------------------------
Reporter: cdrsgi | Type: defect
Status: new | Priority: important
Component: | Version:
undetermined | unspecified
Keywords: flac, split | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
When i try to split a large flac files with ffmpeg, created chunks still
have the large file's duration and sample count.
How to reproduce:
{{{
ffmpeg -v 9 -loglevel 99 -ss 0 -y -i "D:\1.flac" -vn -c:a copy -t 77.222
"C:\1_1.flac"
Exit code: 0
Console output:
ffmpeg version N-75563-g235381e Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 4.9.3 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-
version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-
fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec
--enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc
--enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex
--enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-
aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxavs --enable-libxvid --enable-lzma --enable-decklink
--enable-zlib
libavutil 55. 2.100 / 55. 2.100
libavcodec 57. 3.100 / 57. 3.100
libavformat 57. 2.100 / 57. 2.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 8.100 / 6. 8.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.100 / 2. 0.100
libpostproc 54. 0.100 / 54. 0.100
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 '-ss' ... matched as option 'ss' (set the start time
offset) with argument '0'.
Reading option '-y' ... matched as option 'y' (overwrite output files)
with argument '1'.
Reading option '-i' ... matched as input file with argument 'D:\Mp3\Pearl
Jam\Pearl Jam\1991 - Ten\01 - Pearl Jam - Once.flac'.
Reading option '-vn' ... matched as option 'vn' (disable video) with
argument '1'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument
'copy'.
Reading option '-t' ... matched as option 't' (record or transcode
"duration" seconds of audio/video) with argument '77.222'.
Reading option 'C:\1_1.flac' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file D:\Mp3\Pearl Jam\Pearl Jam\1991 -
Ten\01 - Pearl Jam - Once.flac.
Applying option ss (set the start time offset) with argument 0.
Successfully parsed a group of options.
Opening an input file: D:\Mp3\Pearl Jam\Pearl Jam\1991 - Ten\01 - Pearl
Jam - Once.flac.
Probing aac score:1 size:2048
Probing flac score:50 size:2048
[flac @ 00000000002e2f60] Format flac probed with size=2048 and score=50
[flac @ 00000000002e2f60] Before avformat_find_stream_info() pos: 1973
bytes read:32768 seeks:0
[flac @ 00000000002ecc00] sample/frame number mismatch in adjacent frames
Last message repeated 14 times
[flac @ 00000000002e2f60] All info found
[flac @ 00000000002e2f60] 0: start_time: 0.000 duration: 10.216
[flac @ 00000000002e2f60] stream: start_time: 0.000 duration: 231.667
bitrate=919 kb/s
[flac @ 00000000002e2f60] After avformat_find_stream_info() pos: 19381
bytes read:32768 seeks:0 frames:1
[flac @ 00000000002e2f60] read_seek: 0 0
[flac @ 00000000002e2f60] gen_seek: 0 0
[NULL @ 00000000002ecc00] sample/frame number mismatch in adjacent frames
Last message repeated 14 times
Input #0, flac, from 'D:\Mp3\Pearl Jam\Pearl Jam\1991 - Ten\01 - Pearl Jam
- Once.flac':
Metadata:
ALBUM : Ten
ALBUMARTISTSORT : Pearl Jam
ARTIST : Pearl Jam
ARTISTSORT : Pearl Jam
CATALOGNUMBER : 88697398492
COMMENT : Track 1
DATE : 2009-03-23
disc : 1
GENRE : Grunge
LABEL : Bertelsmann Music Group
LANGUAGE : eng
MEDIA : CD
MUSICBRAINZ_ALBUMARTISTID: 83b9cbe7-9857-49e2-ab8e-b57b01038103
MUSICBRAINZ_ALBUMID: 06fc304e-d70a-4846-93e5-544d6aa618d6
MUSICBRAINZ_ARTISTID: 83b9cbe7-9857-49e2-ab8e-b57b01038103
MUSICBRAINZ_TRACKID: 94bed552-376f-492d-8e87-f470aa7fda0c
MUSICIP_PUID : 15ee9b0f-beda-b60f-cb39-e59d719d9f67
ORIGINALDATE : 1991-08-27
RELEASECOUNTRY : GB
RELEASESTATUS : official
RELEASETYPE : album
SCRIPT : Latn
TITLE : Once
track : 01
REPLAYGAIN_ALBUM_GAIN: -5.72 dB
REPLAYGAIN_ALBUM_PEAK: 1.119748
REPLAYGAIN_TRACK_GAIN: -6.22 dB
REPLAYGAIN_TRACK_PEAK: 0.950928
ENCODEDBY : Easy CD-DA Extractor (http://www.poikosoft.com)
TOTALTRACKS : 11
TOTALDISCS : 2
album_artist : Pearl Jam
Duration: 00:03:51.67, start: 0.000000, bitrate: 919 kb/s
Stream #0:0, 1, 1/44100: Audio: flac, 44100 Hz, stereo, s16
Side data:
replaygain: track gain - -6.220000, track peak - 0.000022, album
gain - -5.720000, album peak - 0.000026,
Successfully opened the file.
Parsing a group of options: output file C:\1_1.flac.
Applying option vn (disable video) with argument 1.
Applying option c:a (codec name) with argument copy.
Applying option t (record or transcode "duration" seconds of audio/video)
with argument 77.222.
Successfully parsed a group of options.
Opening an output file: C:\1_1.flac.
Successfully opened the file.
Output #0, flac, to 'C:\1_1.flac':
Metadata:
ALBUM : Ten
ALBUMARTISTSORT : Pearl Jam
ARTIST : Pearl Jam
ARTISTSORT : Pearl Jam
CATALOGNUMBER : 88697398492
DESCRIPTION : Track 1
DATE : 2009-03-23
DISCNUMBER : 1
GENRE : Grunge
LABEL : Bertelsmann Music Group
LANGUAGE : eng
MEDIA : CD
MUSICBRAINZ_ALBUMARTISTID: 83b9cbe7-9857-49e2-ab8e-b57b01038103
MUSICBRAINZ_ALBUMID: 06fc304e-d70a-4846-93e5-544d6aa618d6
MUSICBRAINZ_ARTISTID: 83b9cbe7-9857-49e2-ab8e-b57b01038103
MUSICBRAINZ_TRACKID: 94bed552-376f-492d-8e87-f470aa7fda0c
MUSICIP_PUID : 15ee9b0f-beda-b60f-cb39-e59d719d9f67
ORIGINALDATE : 1991-08-27
RELEASECOUNTRY : GB
RELEASESTATUS : official
RELEASETYPE : album
SCRIPT : Latn
TITLE : Once
TRACKNUMBER : 01
REPLAYGAIN_ALBUM_GAIN: -5.72 dB
REPLAYGAIN_ALBUM_PEAK: 1.119748
REPLAYGAIN_TRACK_GAIN: -6.22 dB
REPLAYGAIN_TRACK_PEAK: 0.950928
ENCODEDBY : Easy CD-DA Extractor (http://www.poikosoft.com)
TOTALTRACKS : 11
TOTALDISCS : 2
ALBUMARTIST : Pearl Jam
encoder : Lavf57.2.100
Stream #0:0, 0, 1/44100: Audio: flac, 44100 Hz, stereo (16 bit)
Side data:
replaygain: track gain - -6.220000, track peak - 0.000022, album
gain - -5.720000, album peak - 0.000026,
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[NULL @ 00000000002ecc00] sample/frame number mismatch in adjacent frames
Last message repeated 1678 times
No more output streams to write to, finishing.
size= 7284kB time=00:01:17.18 bitrate= 773.1kbits/s
video:0kB audio:7275kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.123952%
Input file #0 (D:\Mp3\Pearl Jam\Pearl Jam\1991 - Ten\01 - Pearl Jam -
Once.flac):
Input stream #0:0 (audio): 833 packets read (7461572 bytes);
Total: 833 packets (7461572 bytes) demuxed
Output file #0 (C:\1_1.flac):
Output stream #0:0 (audio): 832 packets muxed (7449633 bytes);
Total: 832 packets (7449633 bytes) muxed
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 00000000002f5860] Statistics: 2 seeks, 834 writeouts
[AVIOContext @ 00000000002ec740] Statistics: 7569408 bytes read, 0 seeks
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4905>
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