Ticket #703 (open defect)
mp3 in wav - wrong duration
| Reported by: | ami_stuff | Owned by: | |
|---|---|---|---|
| Priority: | minor | Component: | undetermined |
| Version: | git-master | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
File uploaded to incoming.
I think the problem is that ffmpeg reports bitrate 27 kb/s instead of 56 kb/s
(which is correct - winamp reports it), so as a result the reported duration
is two times longer than it should be.
C:\>ffmpeg -i WAVE_MPEG_Layer-3.wav
ffmpeg version N-35295-gb55dd10, Copyright (c) 2000-2011 the FFmpeg developers
built on Nov 30 2011 00:52:52 with gcc 4.6.2
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru
ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope
ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en
able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -
-enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben
c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-
libxvid --enable-zlib
libavutil 51. 29. 1 / 51. 29. 1
libavcodec 53. 39. 1 / 53. 39. 1
libavformat 53. 22. 0 / 53. 22. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 50. 0 / 2. 50. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[wav @ 020B2320] max_analyze_duration 5000000 reached at 5015510
Input #0, wav, from 'WAVE_MPEG_Layer-3.wav':
Duration: 00:05:47.79, bitrate: 27 kb/s
Stream #0:0: Audio: mp3 (U[0][0][0] / 0x0055), 22050 Hz, stereo, s16, 56 kb/
s
At least one output file must be specified
Change History
comment:1 Changed 18 months ago by cehoyos
- Priority changed from normal to minor
- Status changed from new to open
- Version changed from unspecified to git-master
- Reproduced by developer set
comment:2 follow-up: ↓ 3 Changed 10 months ago by michael
the file contains a fact chunk claiming 7668864 samples.
and a sample rate of 22050, these result in 5.79 minutes duration.
Maybe the file is truncated ?
comment:3 in reply to: ↑ 2 Changed 10 months ago by ami_stuff
Replying to michael:
the file contains a fact chunk claiming 7668864 samples.
and a sample rate of 22050, these result in 5.79 minutes duration.
Maybe the file is truncated ?
No, the file is complete, but maybe encoder I've used to create the file was buggy and created file with incorrect fack chunk (on the other hand VLC seems to report correct duration, so maybe it ignores fact chunk and calculates duration from bitrate?).
