Audio codecs

The available options can depend on the version of the underlying encoding tools that Transloadit uses for the following Robots:

Transloadit recommends having: ffmpeg_stack: "v7" in these Robots’ Assembly Instructions. We are intimately aware of how important continuity is for our customers, so stack version upgrades are always opt-in. Stack versions are typically supported for many years before we start issuing deprecation warnings (for example, we had been supporting "v1.0.0" for 11 years before we deprecated it).

`ffmpeg_stack`
Name	Description	Read	Write	Read	Write	Read	Write
		`v5`		`v6`		`v7`
`4gv`	4GV (Fourth Generation Vocoder)	No	No	No	No	No	No
`8svx_exp`	8SVX exponential	Yes	No	Yes	No	Yes	No
`8svx_fib`	8SVX fibonacci	Yes	No	Yes	No	Yes	No
`aac`	AAC (Advanced Audio Coding) (decoders: aac aac_fixed libfdk_aac ) (encoders: aac libfdk_aac )	Yes	Yes	Yes	Yes	Yes	Yes
`aac_latm`	AAC LATM (Advanced Audio Coding LATM syntax)	Yes	No	Yes	No	Yes	No
`ac3`	ATSC A/52A (AC-3) (decoders: ac3 ac3_fixed ) (encoders: ac3 ac3_fixed )	Yes	Yes	Yes	Yes	Yes	Yes
`ac4`	AC-4	No	No	No	No	No	No
`acelp.kelvin`	Sipro ACELP.KELVIN	Yes	No	Yes	No	Yes	No
`adpcm_4xm`	ADPCM 4X Movie	Yes	No	Yes	No	Yes	No
`adpcm_adx`	SEGA CRI ADX ADPCM	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_afc`	ADPCM Nintendo Gamecube AFC	Yes	No	Yes	No	Yes	No
`adpcm_agm`	ADPCM AmuseGraphics Movie AGM	Yes	No	Yes	No	Yes	No
`adpcm_aica`	ADPCM Yamaha AICA	Yes	No	Yes	No	Yes	No
`adpcm_argo`	ADPCM Argonaut Games	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ct`	ADPCM Creative Technology	Yes	No	Yes	No	Yes	No
`adpcm_dtk`	ADPCM Nintendo Gamecube DTK	Yes	No	Yes	No	Yes	No
`adpcm_ea`	ADPCM Electronic Arts	Yes	No	Yes	No	Yes	No
`adpcm_ea_maxis_xa`	ADPCM Electronic Arts Maxis CDROM XA	Yes	No	Yes	No	Yes	No
`adpcm_ea_r1`	ADPCM Electronic Arts R1	Yes	No	Yes	No	Yes	No
`adpcm_ea_r2`	ADPCM Electronic Arts R2	Yes	No	Yes	No	Yes	No
`adpcm_ea_r3`	ADPCM Electronic Arts R3	Yes	No	Yes	No	Yes	No
`adpcm_ea_xas`	ADPCM Electronic Arts XAS	Yes	No	Yes	No	Yes	No
`adpcm_g722`	G.722 ADPCM (decoders: g722 ) (encoders: g722 )	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_g726`	G.726 ADPCM (decoders: g726 ) (encoders: g726 )	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_g726le`	G.726 ADPCM little-endian (decoders: g726le ) (encoders: g726le )	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ima_acorn`	ADPCM IMA Acorn Replay	Yes	No	Yes	No	Yes	No
`adpcm_ima_alp`	ADPCM IMA High Voltage Software ALP	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ima_amv`	ADPCM IMA AMV	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ima_apc`	ADPCM IMA CRYO APC	Yes	No	Yes	No	Yes	No
`adpcm_ima_apm`	ADPCM IMA Ubisoft APM	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ima_cunning`	ADPCM IMA Cunning Developments	Yes	No	Yes	No	Yes	No
`adpcm_ima_dat4`	ADPCM IMA Eurocom DAT4	Yes	No	Yes	No	Yes	No
`adpcm_ima_dk3`	ADPCM IMA Duck DK3	Yes	No	Yes	No	Yes	No
`adpcm_ima_dk4`	ADPCM IMA Duck DK4	Yes	No	Yes	No	Yes	No
`adpcm_ima_ea_eacs`	ADPCM IMA Electronic Arts EACS	Yes	No	Yes	No	Yes	No
`adpcm_ima_ea_sead`	ADPCM IMA Electronic Arts SEAD	Yes	No	Yes	No	Yes	No
`adpcm_ima_iss`	ADPCM IMA Funcom ISS	Yes	No	Yes	No	Yes	No
`adpcm_ima_moflex`	ADPCM IMA MobiClip MOFLEX	Yes	No	Yes	No	Yes	No
`adpcm_ima_mtf`	ADPCM IMA Capcom's MT Framework	Yes	No	Yes	No	Yes	No
`adpcm_ima_oki`	ADPCM IMA Dialogic OKI	Yes	No	Yes	No	Yes	No
`adpcm_ima_qt`	ADPCM IMA QuickTime	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ima_rad`	ADPCM IMA Radical	Yes	No	Yes	No	Yes	No
`adpcm_ima_smjpeg`	ADPCM IMA Loki SDL MJPEG	Yes	No	Yes	No	Yes	No
`adpcm_ima_ssi`	ADPCM IMA Simon & Schuster Interactive	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ima_wav`	ADPCM IMA WAV	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ima_ws`	ADPCM IMA Westwood	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_ms`	ADPCM Microsoft	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_mtaf`	ADPCM MTAF	Yes	No	Yes	No	Yes	No
`adpcm_psx`	ADPCM Playstation	Yes	No	Yes	No	Yes	No
`adpcm_sbpro_2`	ADPCM Sound Blaster Pro 2-bit	Yes	No	Yes	No	Yes	No
`adpcm_sbpro_3`	ADPCM Sound Blaster Pro 2.6-bit	Yes	No	Yes	No	Yes	No
`adpcm_sbpro_4`	ADPCM Sound Blaster Pro 4-bit	Yes	No	Yes	No	Yes	No
`adpcm_swf`	ADPCM Shockwave Flash	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_thp`	ADPCM Nintendo THP	Yes	No	Yes	No	Yes	No
`adpcm_thp_le`	ADPCM Nintendo THP (Little-Endian)	Yes	No	Yes	No	Yes	No
`adpcm_vima`	LucasArts VIMA audio	Yes	No	Yes	No	Yes	No
`adpcm_xa`	ADPCM CDROM XA	Yes	No	Yes	No	Yes	No
`adpcm_xmd`	ADPCM Konami XMD	No	No	Yes	No	Yes	No
`adpcm_yamaha`	ADPCM Yamaha	Yes	Yes	Yes	Yes	Yes	Yes
`adpcm_zork`	ADPCM Zork	Yes	No	Yes	No	Yes	No
`alac`	ALAC (Apple Lossless Audio Codec)	Yes	Yes	Yes	Yes	Yes	Yes
`amr_nb`	AMR-NB (Adaptive Multi-Rate NarrowBand) (decoders: amrnb libopencore_amrnb ) (encoders: libopencore_amrnb )	Yes	Yes	Yes	Yes	Yes	Yes
`amr_wb`	AMR-WB (Adaptive Multi-Rate WideBand) (decoders: amrwb ) (encoders: libvo_amrwbenc )	Yes	Yes	Yes	Yes	Yes	Yes
`anull`	Null audio codec	No	No	Yes	Yes	Yes	Yes
`apac`	Marian's A-pac audio	No	No	Yes	No	Yes	No
`ape`	Monkey's Audio	Yes	No	Yes	No	Yes	No
`aptx`	aptX (Audio Processing Technology for Bluetooth)	Yes	Yes	Yes	Yes	Yes	Yes
`aptx_hd`	aptX HD (Audio Processing Technology for Bluetooth)	Yes	Yes	Yes	Yes	Yes	Yes
`atrac1`	ATRAC1 (Adaptive TRansform Acoustic Coding)	Yes	No	Yes	No	Yes	No
`atrac3`	ATRAC3 (Adaptive TRansform Acoustic Coding 3)	Yes	No	Yes	No	Yes	No
`atrac3al`	ATRAC3 AL (Adaptive TRansform Acoustic Coding 3 Advanced Lossless)	Yes	No	Yes	No	Yes	No
`atrac3p`	ATRAC3+ (Adaptive TRansform Acoustic Coding 3+) (decoders: atrac3plus )	Yes	No	Yes	No	Yes	No
`atrac3pal`	ATRAC3+ AL (Adaptive TRansform Acoustic Coding 3+ Advanced Lossless) (decoders: atrac3plusal )	Yes	No	Yes	No	Yes	No
`atrac9`	ATRAC9 (Adaptive TRansform Acoustic Coding 9)	Yes	No	Yes	No	Yes	No
`avc`	On2 Audio for Video Codec (decoders: on2avc )	Yes	No	Yes	No	Yes	No
`binkaudio_dct`	Bink Audio (DCT)	Yes	No	Yes	No	Yes	No
`binkaudio_rdft`	Bink Audio (RDFT)	Yes	No	Yes	No	Yes	No
`bmv_audio`	Discworld II BMV audio	Yes	No	Yes	No	Yes	No
`bonk`	Bonk audio	No	No	Yes	No	Yes	No
`cbd2_dpcm`	DPCM Cuberoot-Delta-Exact	No	No	Yes	No	Yes	No
`celt`	Constrained Energy Lapped Transform (CELT) (decoders: libcelt )	Yes	No	Yes	No	Yes	No
`codec2`	codec2 (very low bitrate speech codec)	No	No	Yes	Yes	Yes	Yes
`comfortnoise`	RFC 3389 Comfort Noise	Yes	Yes	Yes	Yes	Yes	Yes
`cook`	Cook / Cooker / Gecko (RealAudio G2)	Yes	No	Yes	No	Yes	No
`derf_dpcm`	DPCM Xilam DERF	Yes	No	Yes	No	Yes	No
`dfpwm`	DFPWM (Dynamic Filter Pulse Width Modulation)	No	No	Yes	Yes	Yes	Yes
`dolby_e`	Dolby E	Yes	No	Yes	No	Yes	No
`dsd_lsbf`	DSD (Direct Stream Digital), least significant bit first	Yes	No	Yes	No	Yes	No
`dsd_lsbf_planar`	DSD (Direct Stream Digital), least significant bit first, planar	Yes	No	Yes	No	Yes	No
`dsd_msbf`	DSD (Direct Stream Digital), most significant bit first	Yes	No	Yes	No	Yes	No
`dsd_msbf_planar`	DSD (Direct Stream Digital), most significant bit first, planar	Yes	No	Yes	No	Yes	No
`dsicinaudio`	Delphine Software International CIN audio	Yes	No	Yes	No	Yes	No
`dss_sp`	Digital Speech Standard - Standard Play mode (DSS SP)	Yes	No	Yes	No	Yes	No
`dst`	DST (Direct Stream Transfer)	Yes	No	Yes	No	Yes	No
`dts`	DCA (DTS Coherent Acoustics) (decoders: dca ) (encoders: dca )	Yes	Yes	Yes	Yes	Yes	Yes
`dvaudio`	DV audio	Yes	No	Yes	No	Yes	No
`eac3`	ATSC A/52B (AC-3, E-AC-3)	Yes	Yes	Yes	Yes	Yes	Yes
`evrc`	EVRC (Enhanced Variable Rate Codec)	Yes	No	Yes	No	Yes	No
`fastaudio`	MobiClip FastAudio	Yes	No	Yes	No	Yes	No
`flac`	FLAC (Free Lossless Audio Codec)	Yes	Yes	Yes	Yes	Yes	Yes
`ftr`	FTR Voice	No	No	Yes	No	Yes	No
`g723_1`	G.723.1	Yes	Yes	Yes	Yes	Yes	Yes
`g729`	G.729	Yes	No	Yes	No	Yes	No
`gremlin_dpcm`	DPCM Gremlin	Yes	No	Yes	No	Yes	No
`gsm`	GSM (decoders: gsm libgsm ) (encoders: libgsm )	Yes	Yes	Yes	Yes	Yes	Yes
`gsm_ms`	GSM Microsoft variant (decoders: gsm_ms libgsm_ms ) (encoders: libgsm_ms )	Yes	Yes	Yes	Yes	Yes	Yes
`hca`	CRI HCA	Yes	No	Yes	No	Yes	No
`hcom`	HCOM Audio	Yes	No	Yes	No	Yes	No
`iac`	IAC (Indeo Audio Coder)	Yes	No	Yes	No	Yes	No
`ilbc`	iLBC (Internet Low Bitrate Codec)	Yes	No	Yes	No	Yes	No
`imc`	IMC (Intel Music Coder)	Yes	No	Yes	No	Yes	No
`interplay_dpcm`	DPCM Interplay	Yes	No	Yes	No	Yes	No
`interplayacm`	Interplay ACM	Yes	No	Yes	No	Yes	No
`mace3`	MACE (Macintosh Audio Compression/Expansion) 3:1	Yes	No	Yes	No	Yes	No
`mace6`	MACE (Macintosh Audio Compression/Expansion) 6:1	Yes	No	Yes	No	Yes	No
`metasound`	Voxware MetaSound	Yes	No	Yes	No	Yes	No
`misc4`	Micronas SC-4 Audio	No	No	Yes	No	Yes	No
`mlp`	MLP (Meridian Lossless Packing)	Yes	Yes	Yes	Yes	Yes	Yes
`mp1`	MP1 (MPEG audio layer 1) (decoders: mp1 mp1float )	Yes	No	Yes	No	Yes	No
`mp2`	MP2 (MPEG audio layer 2) (decoders: mp2 mp2float ) (encoders: mp2 mp2fixed )	Yes	Yes	Yes	Yes	Yes	Yes
`mp3`	MP3 (MPEG audio layer 3) (decoders: mp3float mp3 ) (encoders: libmp3lame )	Yes	Yes	Yes	Yes	Yes	Yes
`mp3adu`	ADU (Application Data Unit) MP3 (MPEG audio layer 3) (decoders: mp3adufloat mp3adu )	Yes	No	Yes	No	Yes	No
`mp3on4`	MP3onMP4 (decoders: mp3on4float mp3on4 )	Yes	No	Yes	No	Yes	No
`mp4als`	MPEG-4 Audio Lossless Coding (ALS) (decoders: als )	Yes	No	Yes	No	Yes	No
`mpegh_3d_audio`	MPEG-H 3D Audio	No	No	No	No	No	No
`msnsiren`	MSN Siren	Yes	No	Yes	No	Yes	No
`musepack7`	Musepack SV7 (decoders: mpc7 )	Yes	No	Yes	No	Yes	No
`musepack8`	Musepack SV8 (decoders: mpc8 )	Yes	No	Yes	No	Yes	No
`nellymoser`	Nellymoser Asao	Yes	Yes	Yes	Yes	Yes	Yes
`opus`	Opus (Opus Interactive Audio Codec) (decoders: opus libopus ) (encoders: opus libopus )	Yes	Yes	Yes	Yes	Yes	Yes
`osq`	OSQ (Original Sound Quality)	No	No	Yes	No	Yes	No
`paf_audio`	Amazing Studio Packed Animation File Audio	Yes	No	Yes	No	Yes	No
`pcm_alaw`	PCM A-law / G.711 A-law	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_bluray`	PCM signed 16\|20\|24-bit big-endian for Blu-ray media	Yes	No	Yes	Yes	Yes	Yes
`pcm_dvd`	PCM signed 20\|24-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_f16le`	PCM 16.8 floating point little-endian	Yes	No	Yes	No	Yes	No
`pcm_f24le`	PCM 24.0 floating point little-endian	Yes	No	Yes	No	Yes	No
`pcm_f32be`	PCM 32-bit floating point big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_f32le`	PCM 32-bit floating point little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_f64be`	PCM 64-bit floating point big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_f64le`	PCM 64-bit floating point little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_lxf`	PCM signed 20-bit little-endian planar	Yes	No	Yes	No	Yes	No
`pcm_mulaw`	PCM mu-law / G.711 mu-law	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s16be`	PCM signed 16-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s16be_planar`	PCM signed 16-bit big-endian planar	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s16le`	PCM signed 16-bit little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s16le_planar`	PCM signed 16-bit little-endian planar	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s24be`	PCM signed 24-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s24daud`	PCM D-Cinema audio signed 24-bit	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s24le`	PCM signed 24-bit little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s24le_planar`	PCM signed 24-bit little-endian planar	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s32be`	PCM signed 32-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s32le`	PCM signed 32-bit little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s32le_planar`	PCM signed 32-bit little-endian planar	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s64be`	PCM signed 64-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s64le`	PCM signed 64-bit little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s8`	PCM signed 8-bit	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_s8_planar`	PCM signed 8-bit planar	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_sga`	PCM SGA	Yes	No	Yes	No	Yes	No
`pcm_u16be`	PCM unsigned 16-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_u16le`	PCM unsigned 16-bit little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_u24be`	PCM unsigned 24-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_u24le`	PCM unsigned 24-bit little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_u32be`	PCM unsigned 32-bit big-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_u32le`	PCM unsigned 32-bit little-endian	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_u8`	PCM unsigned 8-bit	Yes	Yes	Yes	Yes	Yes	Yes
`pcm_vidc`	PCM Archimedes VIDC	Yes	Yes	Yes	Yes	Yes	Yes
`qcelp`	QCELP / PureVoice	Yes	No	Yes	No	Yes	No
`qdm2`	QDesign Music Codec 2	Yes	No	Yes	No	Yes	No
`qdmc`	QDesign Music	Yes	No	Yes	No	Yes	No
`qoa`	QOA (Quite OK Audio)	No	No	No	No	Yes	No
`ra_144`	RealAudio 1.0 (14.4K) (decoders: real_144 ) (encoders: real_144 )	Yes	Yes	Yes	Yes	Yes	Yes
`ra_288`	RealAudio 2.0 (28.8K) (decoders: real_288 )	Yes	No	Yes	No	Yes	No
`ralf`	RealAudio Lossless	Yes	No	Yes	No	Yes	No
`rka`	RKA (RK Audio)	No	No	Yes	No	Yes	No
`roq_dpcm`	DPCM id RoQ	Yes	Yes	Yes	Yes	Yes	Yes
`s302m`	SMPTE 302M	Yes	Yes	Yes	Yes	Yes	Yes
`sbc`	SBC (low-complexity subband codec)	Yes	Yes	Yes	Yes	Yes	Yes
`sdx2_dpcm`	DPCM Squareroot-Delta-Exact	Yes	No	Yes	No	Yes	No
`shorten`	Shorten	Yes	No	Yes	No	Yes	No
`sipr`	RealAudio SIPR / ACELP.NET	Yes	No	Yes	No	Yes	No
`siren`	Siren	Yes	No	Yes	No	Yes	No
`smackaudio`	Smacker audio (decoders: smackaud )	Yes	No	Yes	No	Yes	No
`smv`	SMV (Selectable Mode Vocoder)	No	No	No	No	No	No
`sol_dpcm`	DPCM Sol	Yes	No	Yes	No	Yes	No
`sonic`	Sonic	Yes	Yes	Yes	Yes	Yes	Yes
`sonicls`	Sonic lossless	No	Yes	No	Yes	No	Yes
`speex`	Speex (decoders: speex libspeex ) (encoders: libspeex )	Yes	Yes	Yes	Yes	Yes	Yes
`tak`	TAK (Tom's lossless Audio Kompressor)	Yes	No	Yes	No	Yes	No
`truehd`	TrueHD	Yes	Yes	Yes	Yes	Yes	Yes
`truespeech`	DSP Group TrueSpeech	Yes	No	Yes	No	Yes	No
`tta`	TTA (True Audio)	Yes	Yes	Yes	Yes	Yes	Yes
`twinvq`	VQF TwinVQ	Yes	No	Yes	No	Yes	No
`vmdaudio`	Sierra VMD audio	Yes	No	Yes	No	Yes	No
`vorbis`	Vorbis (decoders: vorbis libvorbis ) (encoders: vorbis libvorbis )	Yes	Yes	Yes	Yes	Yes	Yes
`wady_dpcm`	DPCM Marble WADY	No	No	Yes	No	Yes	No
`wavarc`	Waveform Archiver	No	No	Yes	No	Yes	No
`wavesynth`	Wave synthesis pseudo-codec	Yes	No	Yes	No	Yes	No
`wavpack`	WavPack	Yes	Yes	Yes	Yes	Yes	Yes
`westwood_snd1`	Westwood Audio (SND1) (decoders: ws_snd1 )	Yes	No	Yes	No	Yes	No