音视频基础(四)音频文件格式转换(支持重采样采样位数为24位)

ffmpeg将音频文件重采样为8位、16位、32位的命令比较容易查找,但是重采样为24位却非常非常的少。

ffmpeg -i 32.wav -vn -ac 2 -ar 44100 -acodec pcm_s24le -y 24.wav
-i:  输入文件,这里为 32.wav
-vn: 输出文件禁用视频流
-ac: 设置输出文件音频通道的数量,这里为2(双通道)
-ar: 设置输出文件音频采样率,这里为44100
-acodec: 设置输出文件音频编解码器,这里为pcm_s24le(小端有符号的24位)
-y: 无需询问即可覆盖输出文件

ffmpeg支持的编解码有

Decoders:
 V..... = Video
 A..... = Audio
 S..... = Subtitle
 .F.... = Frame-level multithreading
 ..S... = Slice-level multithreading
 ...X.. = Codec is experimental
 ....B. = Supports draw_horiz_band
 .....D = Supports direct rendering method 1
 ------
 V....D 012v                 Uncompressed 4:2:2 10-bit
 V....D 4xm                  4X Movie
 V....D 8bps                 QuickTime 8BPS video
 V....D aasc                 Autodesk RLE
 V..... amv                  AMV Video
 V....D anm                  Deluxe Paint Animation
 V....D ansi                 ASCII/ANSI art
 V....D asv1                 ASUS V1
 V....D asv2                 ASUS V2
 V....D aura                 Auravision AURA
 V....D aura2                Auravision Aura 2
 V....D avrn                 Avid AVI Codec
 V....D avrp                 Avid 1:1 10-bit RGB Packer
 V....D avs                  AVS (Audio Video Standard) video
 V....D avui                 Avid Meridien Uncompressed
 V....D ayuv                 Uncompressed packed MS 4:4:4:4
 V....D bethsoftvid          Bethesda VID video
 V....D bfi                  Brute Force & Ignorance
 V....D binkvideo            Bink video
 V....D bintext              Binary text
 V....D bmp                  BMP (Windows and OS/2 bitmap)
 V....D bmv_video            Discworld II BMV video
 V....D brender_pix          BRender PIX image
 V....D c93                  Interplay C93
 V....D cavs                 Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)
 V....D cdgraphics           CD Graphics video
 V....D cdxl                 Commodore CDXL video
 V....D cinepak              Cinepak
 V....D cljr                 Cirrus Logic AccuPak
 V....D cllc                 Canopus Lossless Codec
 V....D eacmv                Electronic Arts CMV video (codec cmv)
 V....D cpia                 CPiA video format
 V....D camstudio            CamStudio (codec cscd)
 V....D cyuv                 Creative YUV (CYUV)
 V....D dfa                  Chronomaster DFA
 V..... dirac                BBC Dirac VC-2
 V..... libschroedinger      libschroedinger Dirac 2.2 (codec dirac)
 VF...D dnxhd                VC3/DNxHD
 V....D dpx                  DPX image
 V....D dsicinvideo          Delphine Software International CIN video
 V.S..D dvvideo              DV (Digital Video)
 V....D dxa                  Feeble Files/ScummVM DXA
 V....D dxtory               Dxtory
 V....D escape124            Escape 124
 V....D escape130            Escape 130
 VF...D exr                  OpenEXR image
 V.S..D ffv1                 FFmpeg video codec #1
 VF..BD ffvhuff              Huffyuv FFmpeg variant
 V....D flashsv              Flash Screen Video v1
 V....D flashsv2             Flash Screen Video v2
 V....D flic                 Autodesk Animator Flic video
 V...BD flv                  FLV / Sorenson Spark / Sorenson H.263 (Flash Video) (codec flv1)
 VF...D fraps                Fraps
 V....D frwu                 Forward Uncompressed
 V....D gif                  GIF (Graphics Interchange Format)
 V....D h261                 H.261
 V...BD h263                 H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2
 V...BD h263i                Intel H.263
 V...BD h263p                H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2
 VFS..D h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
 VF..BD huffyuv              Huffyuv / HuffYUV
 V....D idcinvideo           id Quake II CIN video (codec idcin)
 V....D idf                  iCEDraw text
 V....D iff                  IFF (codec iff_byterun1)
 V....D iff                  IFF (codec iff_ilbm)
 V....D indeo2               Intel Indeo 2
 V....D indeo3               Intel Indeo 3
 V....D indeo4               Intel Indeo Video Interactive 4
 V....D indeo5               Intel Indeo Video Interactive 5
 V....D interplayvideo       Interplay MVE video
 V..X.. j2k                  JPEG 2000 (codec jpeg2000)
 VF...D libopenjpeg          OpenJPEG JPEG 2000 (codec jpeg2000)
 V....D jpegls               JPEG-LS
 V....D jv                   Bitmap Brothers JV video
 V....D kgv1                 Kega Game Video
 V....D kmvc                 Karl Morton's video codec
 VF...D lagarith             Lagarith lossless
 V....D loco                 LOCO
 V....D eamad                Electronic Arts Madcow Video (codec mad)
 VF...D mdec                 Sony PlayStation MDEC (Motion DECoder)
 VF...D mimic                Mimic
 V....D mjpeg                MJPEG (Motion JPEG)
 V....D mjpegb               Apple MJPEG-B
 V....D mmvideo              American Laser Games MM Video
 V....D motionpixels         Motion Pixels video
 V.S.BD mpeg1video           MPEG-1 video
 V.S.BD mpeg2video           MPEG-2 video
 V.S.BD mpegvideo            MPEG-1 video (codec mpeg2video)
 VF..BD mpeg4                MPEG-4 part 2
 V....D msa1                 MS ATC Screen
 V...BD msmpeg4v1            MPEG-4 part 2 Microsoft variant version 1
 V...BD msmpeg4v2            MPEG-4 part 2 Microsoft variant version 2
 V...BD msmpeg4              MPEG-4 part 2 Microsoft variant version 3 (codec msmpeg4v3)
 V....D msrle                Microsoft RLE
 V....D mss1                 MS Screen 1
 V....D mss2                 MS Windows Media Video V9 Screen
 V....D msvideo1             Microsoft Video 1
 V....D mszh                 LCL (LossLess Codec Library) MSZH
 V....D mts2                 MS Expression Encoder Screen
 V....D mvc1                 Silicon Graphics Motion Video Compressor 1
 V....D mvc2                 Silicon Graphics Motion Video Compressor 2
 V....D mxpeg                Mobotix MxPEG video
 V....D nuv                  NuppelVideo/RTJPEG
 V....D paf_video            Amazing Studio Packed Animation File Video
 V....D pam                  PAM (Portable AnyMap) image
 V....D pbm                  PBM (Portable BitMap) image
 V....D pcx                  PC Paintbrush PCX image
 V....D pgm                  PGM (Portable GrayMap) image
 V....D pgmyuv               PGMYUV (Portable GrayMap YUV) image
 V....D pictor               Pictor/PC Paint
 V....D png                  PNG (Portable Network Graphics) image
 V....D ppm                  PPM (Portable PixelMap) image
 V.S..D prores               ProRes
 V.S..D prores_lgpl          Apple ProRes (iCodec Pro) (codec prores)
 V....D ptx                  V.Flash PTX image
 V....D qdraw                Apple QuickDraw
 V....D qpeg                 Q-team QPEG
 V....D qtrle                QuickTime Animation (RLE) video
 V....D r10k                 AJA Kona 10-bit RGB Codec
 V....D r210                 Uncompressed RGB 10-bit
 V..... rawvideo             raw video
 V....D rl2                  RL2 video
 V....D roqvideo             id RoQ video (codec roq)
 V....D rpza                 QuickTime video (RPZA)
 V....D rv10                 RealVideo 1.0
 V....D rv20                 RealVideo 2.0
 VF...D rv30                 RealVideo 3.0
 VF...D rv40                 RealVideo 4.0
 V....D sanm                 LucasArts SMUSH video
 V....D sgi                  SGI image
 V....D sgirle               SGI RLE 8-bit
 V....D smackvid             Smacker video (codec smackvideo)
 V....D smc                  QuickTime Graphics (SMC)
 V....D snow                 Snow
 V....D sp5x                 Sunplus JPEG (SP5X)
 V....D sunrast              Sun Rasterfile image
 V....D svq1                 Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1
 V...BD svq3                 Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3
 V....D targa                Truevision Targa image
 V....D targa_y216           Pinnacle TARGA CineWave YUV16
 V....D eatgq                Electronic Arts TGQ video (codec tgq)
 V..... eatgv                Electronic Arts TGV video (codec tgv)
 VF..BD theora               Theora
 V....D thp                  Nintendo Gamecube THP video
 V....D tiertexseqvideo      Tiertex Limited SEQ video
 V....D tiff                 TIFF image
 V....D tmv                  8088flex TMV
 V....D eatqi                Electronic Arts TQI Video (codec tqi)
 V....D truemotion1          Duck TrueMotion 1.0
 V....D truemotion2          Duck TrueMotion 2.0
 V....D camtasia             TechSmith Screen Capture Codec (codec tscc)
 V....D tscc2                TechSmith Screen Codec 2
 V....D txd                  Renderware TXD (TeXture Dictionary) image
 V....D ultimotion           IBM UltiMotion (codec ulti)
 VF...D utvideo              Ut Video
 V....D v210                 Uncompressed 4:2:2 10-bit
 V....D v210x                Uncompressed 4:2:2 10-bit
 V....D v308                 Uncompressed packed 4:4:4
 V....D v408                 Uncompressed packed QT 4:4:4:4
 V....D v410                 Uncompressed 4:4:4 10-bit
 V....D vb                   Beam Software VB
 V....D vble                 VBLE Lossless Codec
 V....D vc1                  SMPTE VC-1
 V....D vc1image             Windows Media Video 9 Image v2
 V....D vcr1                 ATI VCR1
 V....D xl                   Miro VideoXL (codec vixl)
 V....D vmdvideo             Sierra VMD video
 V....D vmnc                 VMware Screen Codec / VMware Video
 VF..BD vp3                  On2 VP3
 V....D vp5                  On2 VP5
 V....D vp6                  On2 VP6
 V.S..D vp6a                 On2 VP6 (Flash version, with alpha channel)
 V....D vp6f                 On2 VP6 (Flash version)
 VFS..D vp8                  On2 VP8
 V..... libvpx               libvpx VP8 (codec vp8)
 V...BD wmv1                 Windows Media Video 7
 V...BD wmv2                 Windows Media Video 8
 V....D wmv3                 Windows Media Video 9
 V....D wmv3image            Windows Media Video 9 Image
 V....D wnv1                 Winnov WNV1
 V....D vqavideo             Westwood Studios VQA (Vector Quantized Animation) video (codec ws_vqa)
 V....D xan_wc3              Wing Commander III / Xan
 V....D xan_wc4              Wing Commander IV / Xxan
 V....D xbin                 eXtended BINary text
 V....D xbm                  XBM (X BitMap) image
 V..... xface                X-face image
 V....D xwd                  XWD (X Window Dump) image
 V....D y41p                 Uncompressed YUV 4:1:1 12-bit
 V..... yop                  Psygnosis YOP Video
 V....D yuv4                 Uncompressed packed 4:2:0
 V....D zerocodec            ZeroCodec Lossless Video
 V....D zlib                 LCL (LossLess Codec Library) ZLIB
 V....D zmbv                 Zip Motion Blocks Video
 A....D 8svx_exp             8SVX exponential
 A....D 8svx_fib             8SVX fibonacci
 A....D aac                  AAC (Advanced Audio Coding)
 A....D aac_latm             AAC LATM (Advanced Audio Coding LATM syntax)
 A....D ac3                  ATSC A/52A (AC-3)
 A....D adpcm_4xm            ADPCM 4X Movie
 A....D adpcm_adx            SEGA CRI ADX ADPCM
 A....D adpcm_afc            ADPCM Nintendo Gamecube AFC
 A....D adpcm_ct             ADPCM Creative Technology
 A....D adpcm_ea             ADPCM Electronic Arts
 A....D adpcm_ea_maxis_xa    ADPCM Electronic Arts Maxis CDROM XA
 A....D adpcm_ea_r1          ADPCM Electronic Arts R1
 A....D adpcm_ea_r2          ADPCM Electronic Arts R2
 A....D adpcm_ea_r3          ADPCM Electronic Arts R3
 A....D adpcm_ea_xas         ADPCM Electronic Arts XAS
 A....D g722                 G.722 ADPCM (codec adpcm_g722)
 A....D g726                 G.726 ADPCM (codec adpcm_g726)
 A....D adpcm_ima_amv        ADPCM IMA AMV
 A....D adpcm_ima_apc        ADPCM IMA CRYO APC
 A....D adpcm_ima_dk3        ADPCM IMA Duck DK3
 A....D adpcm_ima_dk4        ADPCM IMA Duck DK4
 A....D adpcm_ima_ea_eacs    ADPCM IMA Electronic Arts EACS
 A....D adpcm_ima_ea_sead    ADPCM IMA Electronic Arts SEAD
 A....D adpcm_ima_iss        ADPCM IMA Funcom ISS
 A....D adpcm_ima_oki        ADPCM IMA Dialogic OKI
 A....D adpcm_ima_qt         ADPCM IMA QuickTime
 A....D adpcm_ima_smjpeg     ADPCM IMA Loki SDL MJPEG
 A....D adpcm_ima_wav        ADPCM IMA WAV
 A....D adpcm_ima_ws         ADPCM IMA Westwood
 A....D adpcm_ms             ADPCM Microsoft
 A....D adpcm_sbpro_2        ADPCM Sound Blaster Pro 2-bit
 A....D adpcm_sbpro_3        ADPCM Sound Blaster Pro 2.6-bit
 A....D adpcm_sbpro_4        ADPCM Sound Blaster Pro 4-bit
 A....D adpcm_swf            ADPCM Shockwave Flash
 A....D adpcm_thp            ADPCM Nintendo Gamecube THP
 A....D adpcm_xa             ADPCM CDROM XA
 A....D adpcm_yamaha         ADPCM Yamaha
 A....D alac                 ALAC (Apple Lossless Audio Codec)
 A....D amrnb                AMR-NB (Adaptive Multi-Rate NarrowBand) (codec amr_nb)
 A....D libopencore_amrnb    OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band) (codec amr_nb)
 A....D amrwb                AMR-WB (Adaptive Multi-Rate WideBand) (codec amr_wb)
 A....D libopencore_amrwb    OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band) (codec amr_wb)
 A....D ape                  Monkey's Audio
 A....D atrac1               Atrac 1 (Adaptive TRansform Acoustic Coding)
 A....D atrac3               Atrac 3 (Adaptive TRansform Acoustic Coding 3)
 A....D binkaudio_dct        Bink Audio (DCT)
 A....D binkaudio_rdft       Bink Audio (RDFT)
 A....D bmv_audio            Discworld II BMV audio
 A....D comfortnoise         RFC 3389 comfort noise generator
 A....D cook                 Cook / Cooker / Gecko (RealAudio G2)
 A....D dsicinaudio          Delphine Software International CIN audio
 A....D dca                  DCA (DTS Coherent Acoustics) (codec dts)
 A....D eac3                 ATSC A/52B (AC-3, E-AC-3)
 A....D flac                 FLAC (Free Lossless Audio Codec)
 A....D g723_1               G.723.1
 A....D g729                 G.729
 A....D gsm                  GSM
 A....D libgsm               libgsm GSM (codec gsm)
 A....D gsm_ms               GSM Microsoft variant
 A....D libgsm_ms            libgsm GSM Microsoft variant (codec gsm_ms)
 A....D iac                  IAC (Indeo Audio Coder)
 A....D imc                  IMC (Intel Music Coder)
 A....D interplay_dpcm       DPCM Interplay
 A....D mace3                MACE (Macintosh Audio Compression/Expansion) 3:1
 A....D mace6                MACE (Macintosh Audio Compression/Expansion) 6:1
 A....D mlp                  MLP (Meridian Lossless Packing)
 A....D mp1                  MP1 (MPEG audio layer 1)
 A....D mp1float             MP1 (MPEG audio layer 1) (codec mp1)
 A....D mp2                  MP2 (MPEG audio layer 2)
 A....D mp2float             MP2 (MPEG audio layer 2) (codec mp2)
 A....D mp3                  MP3 (MPEG audio layer 3)
 A....D mp3float             MP3 (MPEG audio layer 3) (codec mp3)
 A....D mp3adu               ADU (Application Data Unit) MP3 (MPEG audio layer 3)
 A....D mp3adufloat          ADU (Application Data Unit) MP3 (MPEG audio layer 3) (codec mp3adu)
 A....D mp3on4               MP3onMP4
 A....D mp3on4float          MP3onMP4 (codec mp3on4)
 A....D als                  MPEG-4 Audio Lossless Coding (ALS) (codec mp4als)
 A....D mpc7                 Musepack SV7 (codec musepack7)
 A....D mpc8                 Musepack SV8 (codec musepack8)
 A....D nellymoser           Nellymoser Asao
 A....D libopus              libopus Opus (codec opus)
 A....D paf_audio            Amazing Studio Packed Animation File Audio
 A....D pcm_alaw             PCM A-law / G.711 A-law
 A....D pcm_bluray           PCM signed 16|20|24-bit big-endian for Blu-ray media
 A....D pcm_dvd              PCM signed 20|24-bit big-endian
 A....D pcm_f32be            PCM 32-bit floating point big-endian
 A....D pcm_f32le            PCM 32-bit floating point little-endian
 A....D pcm_f64be            PCM 64-bit floating point big-endian
 A....D pcm_f64le            PCM 64-bit floating point little-endian
 A....D pcm_lxf              PCM signed 20-bit little-endian planar
 A....D pcm_mulaw            PCM mu-law / G.711 mu-law
 A....D pcm_s16be            PCM signed 16-bit big-endian
 A....D pcm_s16be_planar     PCM signed 16-bit big-endian planar
 A....D pcm_s16le            PCM signed 16-bit little-endian
 A....D pcm_s16le_planar     PCM signed 16-bit little-endian planar
 A....D pcm_s24be            PCM signed 24-bit big-endian
 A....D pcm_s24daud          PCM D-Cinema audio signed 24-bit
 A....D pcm_s24le            PCM signed 24-bit little-endian
 A....D pcm_s24le_planar     PCM signed 24-bit little-endian planar
 A....D pcm_s32be            PCM signed 32-bit big-endian
 A....D pcm_s32le            PCM signed 32-bit little-endian
 A....D pcm_s32le_planar     PCM signed 32-bit little-endian planar
 A....D pcm_s8               PCM signed 8-bit
 A....D pcm_s8_planar        PCM signed 8-bit planar
 A....D pcm_u16be            PCM unsigned 16-bit big-endian
 A....D pcm_u16le            PCM unsigned 16-bit little-endian
 A....D pcm_u24be            PCM unsigned 24-bit big-endian
 A....D pcm_u24le            PCM unsigned 24-bit little-endian
 A....D pcm_u32be            PCM unsigned 32-bit big-endian
 A....D pcm_u32le            PCM unsigned 32-bit little-endian
 A....D pcm_u8               PCM unsigned 8-bit
 A....D pcm_zork             PCM Zork
 A....D qcelp                QCELP / PureVoice
 A....D qdm2                 QDesign Music Codec 2
 A....D real_144             RealAudio 1.0 (14.4K) (codec ra_144)
 A....D real_288             RealAudio 2.0 (28.8K) (codec ra_288)
 A....D ralf                 RealAudio Lossless
 A....D roq_dpcm             DPCM id RoQ
 A....D s302m                SMPTE 302M
 A....D shorten              Shorten
 A....D sipr                 RealAudio SIPR / ACELP.NET
 A....D smackaud             Smacker audio (codec smackaudio)
 A....D sol_dpcm             DPCM Sol
 A..X.D sonic                Sonic
 A....D libspeex             libspeex Speex (codec speex)
 A....D tak                  TAK (Tom's lossless Audio Kompressor)
 A....D truehd               TrueHD
 A....D truespeech           DSP Group TrueSpeech
 A....D tta                  TTA (True Audio)
 A....D twinvq               VQF TwinVQ
 A....D vima                 LucasArts VIMA audio
 A....D vmdaudio             Sierra VMD audio
 A....D vorbis               Vorbis
 A..... libvorbis            libvorbis (codec vorbis)
 A....D wavesynth            Wave synthesis pseudo-codec
 A....D wavpack              WavPack
 A....D ws_snd1              Westwood Audio (SND1) (codec westwood_snd1)
 A....D wmalossless          Windows Media Audio Lossless
 A....D wmapro               Windows Media Audio 9 Professional
 A....D wmav1                Windows Media Audio 1
 A....D wmav2                Windows Media Audio 2
 A....D wmavoice             Windows Media Audio Voice
 A....D xan_dpcm             DPCM Xan
 S..... dvbsub               DVB subtitles (codec dvb_subtitle)
 S..... dvdsub               DVD subtitles (codec dvd_subtitle)
 S..... pgssub               HDMV Presentation Graphic Stream subtitles (codec hdmv_pgs_subtitle)
 S..... jacosub              JACOsub subtitle
 S..... microdvd             MicroDVD subtitle
 S..... mov_text             3GPP Timed Text subtitle
 S..... mpl2                 MPL2 subtitle
 S..... pjs                  PJS subtitle
 S..... realtext             RealText subtitle
 S..... sami                 SAMI subtitle
 S..... srt                  SubRip subtitle with embedded timing
 S..... ass                  SSA (SubStation Alpha) subtitle (codec ssa)
 S..... subrip               SubRip subtitle
 S..... subviewer            SubViewer subtitle
 S..... subviewer1           SubViewer1 subtitle
 S..... text                 Raw text subtitle
 S..... vplayer              VPlayer subtitle
 S..... webvtt               WebVTT subtitle
 S..... xsub                 XSUB

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