New submission from Michael <zenithanimati...@gmail.com>: ffmpeg -v 9 -loglevel 99 -i together.wma -ab 320k -map_meta_data together.m4a:together.wma together.m4a FFmpeg version SVN-r23926, Copyright (c) 2000-2010 the FFmpeg developers built on Jul 1 2010 04:29:33 with gcc 4.4.2 configuration: --enable-gpl --enable-version3 --enable-libgsm -- enable-pthread s --enable-libvorbis --enable-libtheora --enable-libspeex --enable- libmp3lame -- enable-libopenjpeg --enable-libschroedinger --enable-libopencore_amrwb - -enable- libopencore_amrnb --enable-libvpx --arch=x86 --enable-runtime-cpudetect --enable -libxvid --enable-libx264 --extra-libs='-lx264 -lpthread' --enable- librtmp --ext ra-libs='-lrtmp -lpolarssl -lws2_32 -lwinmm' --target-os=mingw32 -- enable-avisyn th --cross-prefix=i686-mingw32- --cc='ccache i686-mingw32-gcc' --enable- memalign -hack libavutil 50.19. 0 / 50.19. 0 libavcodec 52.78. 0 / 52.78. 0 libavformat 52.71. 0 / 52.71. 0 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.20. 1 / 1.20. 1 libswscale 0.11. 0 / 0.11. 0 [NULL @ 0188bf90] Probed with size=2048 and score=100 [asf @ 0188bf90] Unsupported value type 1 in tag WM/MCDI. [asf @ 0188bf90] gpos mismatch our pos=24, end=26 [asf @ 0188bf90] gpos mismatch our pos=24, end=34 [asf @ 0188bf90] gpos mismatch our pos=24, end=374 [asf @ 0188bf90] gpos mismatch our pos=24, end=3121 [asf @ 0188bf90] gpos mismatch our pos=24, end=174 [asf @ 0188bf90] All info found Input #0, asf, from 'together.wma': Metadata: title : Come Together author : The Beatles copyright : comment : WM/Genre : Rock WM/AlbumTitle : Abbey Road WM/Track : 0 WM/TrackNumber : 1 WM/Year : 1969 WM/Composer : John Lennon; Paul McCartney WM/AlbumArtist : The Beatles WM/Lyrics : WM/MediaPrimaryClassID: {D1607DBC-E323-4BE2-86A1-48A42A28441E} WMFSDKVersion : 12.0.7600.16385 WMFSDKNeeded : 0.0.0.0000 PeakValue : 313 AverageLevel : 601 WM/EncodingTime : 6361699 WM/Provider : AMG WM/Publisher : Toshiba EMI WM/UniqueFileIdentifier: AMGa_id=R 1525;AMGp_id=P 3644;AMGt_id=T 7 20900 WM/ProviderRating: 8 WM/ProviderStyle: Pop/Rock IsVBR : 0 MediaFoundationVersion: 2.112 Duration: 00:04:19.96, start: 1.579000, bitrate: 128 kb/s Stream #0.0, 1, 1/1000: Audio: wmav2, 44100 Hz, 2 channels, s16, 128 kb/s File 'together.m4a' already exists. Overwrite ? [y/N] y Output #0, ipod, to 'together.m4a': Metadata: title : Come Together artist : The Beatles copyright : comment : genre : Rock album : Abbey Road track : 1 WM/Year : 1969 composer : John Lennon; Paul McCartney album_artist : The Beatles WM/Lyrics : WM/MediaPrimaryClassID: {D1607DBC-E323-4BE2-86A1-48A42A28441E} WMFSDKVersion : 12.0.7600.16385 WMFSDKNeeded : 0.0.0.0000 PeakValue : 313 AverageLevel : 601 WM/EncodingTime : 6361699 WM/Provider : AMG publisher : Toshiba EMI WM/UniqueFileIdentifier: AMGa_id=R 1525;AMGp_id=P 3644;AMGt_id=T 7 20900 WM/ProviderRating: 8 WM/ProviderStyle: Pop/Rock IsVBR : 0 MediaFoundationVersion: 2.112 encoder : Lavf52.71.0 Stream #0.0, 0, 1/44100: Audio: aac, 44100 Hz, 2 channels, s16, 320 kb/s Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding size= 9401kB time=260.02 bitrate= 296.2kbits/s video:0kB audio:9313kB global headers:0kB muxing overhead 0.949192%
The output m4a files have easily noticeable audio artifacts that seem to be coming exclusively from the left ear (channel). A sample of the original and coverted file is attached. File 'together.m4a' not attached - you can download it from https://roundup.ffmpeg.org/file964. ---------- files: together.m4a messages: 11057 priority: normal status: new substatus: new title: Creating m4a (aac) file produces artifacts in output topic: ffmpeg type: bug ________________________________________________ FFmpeg issue tracker <iss...@roundup.ffmpeg.org> <https://roundup.ffmpeg.org/issue2065> ________________________________________________