Opened 3 years ago

Last modified 3 years ago

#5826 closed defect

Samplerate is wrong when M4A ALAC file converted to WAVE — at Initial Version

Reported by: liuwei Owned by:
Priority: important Component: undetermined
Version: git-master Keywords: alac regression
Cc: Blocked By:
Blocking: Reproduced by developer: yes
Analyzed by developer: no

Description

When using newest git ffmpeg to convert a 96K samplerate alac m4a file to wav,the wav samplerate is 48K.
But ffmpeg-2.7.2 is ok.

./ffmpeg -i 2L50SACD_tr01_multi_96.m4a test.wav

git version 1.7.2.5

This is newest ffmpeg log:
./ffmpeg -i 2L50SACD_tr01_multi_96.m4a
ffmpeg version N-81555-g496d97f Copyright (c) 2000-2016 the FFmpeg developers

built with gcc 4.4.5 (Debian 4.4.5-8)
configuration: --prefix=/home/liuw/open_source/ffmpeg_git/ --enable-debug --disable-optimizations --disable-yasm --disable-asm --disable-pthreads
libavutil 55. 29.100 / 55. 29.100
libavcodec 57. 54.102 / 57. 54.102
libavformat 57. 48.102 / 57. 48.102
libavdevice 57. 0.102 / 57. 0.102
libavfilter 6. 60.100 / 6. 60.100
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100

[alac @ 0xb45e470] Warning: not compiled with thread support, using thread emulation
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2L50SACD_tr01_multi_96.m4a':

Metadata:

major_brand : M4A
minor_version : 0
compatible_brands: M4A mp42isom
creation_time : 2016-09-05T07:34:08.000000Z
track : 1/11
disc : 1/1
album : DIVERTIMENTI
album_artist : TrondheimSolistene?
artist : TrondheimSolistene?
comment : 2L50SACD All rights reserved Lindberg Lyd AS, Norway
composer : Benjamin Britten
PERFORMER : TrondheimSolistene?
title : Britten: Simple Symphony 1
encoder : refalac 1.13, Apple Lossless Encoder
date : 14.04.2008

Duration: 00:03:01.75, start: 0.000000, bitrate: 6873 kb/s

Stream #0:0(und): Audio: alac (alac / 0x63616C61), 48000 Hz, 5.1, s32p (24 bit), 6872 kb/s (default)
Metadata:

creation_time : 2016-09-05T07:34:08.000000Z

This is ffmpeg-2.7.2 log:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2L50SACD_tr01_multi_96.m4a':

Metadata:

major_brand : M4A
minor_version : 0
compatible_brands: M4A mp42isom
creation_time : 2016-09-05 07:34:08
track : 1/11
disc : 1/1
album : DIVERTIMENTI
album_artist : TrondheimSolistene?
artist : TrondheimSolistene?
comment : 2L50SACD All rights reserved Lindberg Lyd AS, Norway
composer : Benjamin Britten
PERFORMER : TrondheimSolistene?
title : Britten: Simple Symphony 1
encoder : refalac 1.13, Apple Lossless Encoder
date : 14.04.2008

Duration: 00:03:01.75, start: 0.000000, bitrate: 6873 kb/s

Stream #0:0(und): Audio: alac (alac / 0x63616C61), 96000 Hz, 5.1, s32p (24 bit), 6872 kb/s (default)
Metadata:

creation_time : 2016-09-05 07:34:08

Change History (0)

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