Re: [Audacity-devel] List of FFmpeg encoders and decoders included with gstreamer

[Leland <le...@au...>]

Wow...perfect review and I like the idea of "mini-modules" for handling 
each type.  The current options dialog for FFmpeg is just way to 
complicated.

Leland

On 11/2/2013 4:43 PM, Richard Ash wrote:
> On Fri, 01 Nov 2013 16:40:55 -0500 Leland <le...@au...>
> wrote:
>
>> Mind you, this is on the FFmpeg guys.  gstreamer comes with a bunch
>> more.
> Most of these are video encoders, so not of any relevance to us. Where
> there are multiple implementations, bear in mind that deep bit depth
> (>16 bit) audio in ffmpeg/libav is limited, where as it is robust in
> libsndfile etc.
>
> I'm not quite sure what the point of posting this is, but we don't need
> to make anything like all of them available to the UI - there are
> relatively few which account for nearly all uses and were the reason
> for wanting ffmpeg support originally. On the Import side this probably
> doesn't matter a lot (because it will work out for itself what to use
> as an importer), but on Export, I would expect to build a core link to
> Gstreamer, then create exporters for each format which are relatively
> slim and basically provide a UI and a gstreamer recipie which are fed
> to the core. Maybe the exporters could be modules, so more can be added
> as we work out how to use functionality, and if there is demand?
>
>
> * These two are important (reasons for wanting ffmpeg in the first
>    place)
>> ffmpeg:  ffenc_aac: FFmpeg Advanced Audio Coding encoder
>> ffmpeg:  ffenc_ac3: FFmpeg ATSC A/52A (AC-3) encoder
> Duplicated in libsndfile. I expect we will prefer to stick with that
> implementation
>> ffmpeg:  ffenc_alac: FFmpeg ALAC (Apple Lossless Audio Codec) encoder
> * Important (reason for wanting ffmpeg in the first place)
>> ffmpeg:  ffenc_eac3: FFmpeg ATSC A/52 E-AC-3 encoder
> Duplicate twolame. No real motivation for change, as this is mostly
> about compatibility for hardware systems (radio playout etc) probably
> stick as is.
>> ffmpeg:  ffenc_mp2: FFmpeg MP2 (MPEG audio layer 2) encoder
> Fringe, not accessible at the moment, no reason to use
>> ffmpeg:  ffenc_nellymoser: FFmpeg Nellymoser Asao encoder
>> ffmpeg:  ffenc_real_144: FFmpeg RealAudio 1.0 (14.4K) encoder encoder
> * These two are important (reasons for wanting ffmpeg in the first
>    place)
>> ffmpeg:  ffenc_wmav1: FFmpeg Windows Media Audio 1 encoder
>> ffmpeg:  ffenc_wmav2: FFmpeg Windows Media Audio 2 encoder
> All the rest are fringe or in libsndfile. The ones not in libsndfile
> might be nice-to-have, but not priority (only really useful to people
> feeding telephone systems and the like
>> ffmpeg:  ffenc_roq_dpcm: FFmpeg id RoQ DPCM encoder
>> ffmpeg:  ffenc_adpcm_adx: FFmpeg SEGA CRI ADX ADPCM encoder
>> ffmpeg:  ffenc_g722: FFmpeg G.722 ADPCM encoder
>> ffmpeg:  ffenc_g726: FFmpeg G.726 ADPCM encoder
>> ffmpeg:  ffenc_adpcm_ima_qt: FFmpeg ADPCM IMA QuickTime encoder
>> ffmpeg:  ffenc_adpcm_ima_wav: FFmpeg ADPCM IMA WAV encoder
>> ffmpeg:  ffenc_adpcm_ms: FFmpeg ADPCM Microsoft encoder
>> ffmpeg:  ffenc_adpcm_swf: FFmpeg ADPCM Shockwave Flash encoder
>> ffmpeg:  ffenc_adpcm_yamaha: FFmpeg ADPCM Yamaha encoder
>
>> Here's the decoders:
> * These three are important (reasons for wanting ffmpeg in the first
>    place)
>> ffmpeg:  ffdec_aac: FFmpeg Advanced Audio Coding decoder
>> ffmpeg:  ffdec_aac_latm: FFmpeg AAC LATM (Advanced Audio Codec LATM
>> syntax) decoder
>> ffmpeg:  ffdec_ac3: FFmpeg ATSC A/52A (AC-3) decoder
> Duplicate libsndfile as above
>> ffmpeg:  ffdec_alac: FFmpeg ALAC (Apple Lossless Audio Codec) decoder
> Never heard of it - probably rare in the wild!
>> ffmpeg:  ffdec_als: FFmpeg MPEG-4 Audio Lossless Coding (ALS) decoder
> * These three are important (reasons for wanting ffmpeg in the first
>    place) - first two for phone audio, last is just common
>> ffmpeg:  ffdec_amrnb: FFmpeg Adaptive Multi-Rate NarrowBand decoder
>> ffmpeg:  ffdec_amrwb: FFmpeg Adaptive Multi-Rate WideBand decoder
>> ffmpeg:  ffdec_ape: FFmpeg Monkey's Audio decoder
> Minidisc coding - didn't know they were here. Potentially useful but
> not a priority.
>> ffmpeg:  ffdec_atrac1: FFmpeg Atrac 1 (Adaptive TRansform Acoustic
>> Coding) decoder
>> ffmpeg:  ffdec_atrac3: FFmpeg Atrac 3 (Adaptive TRansform Acoustic
>> Coding 3) decoder
> Really weird ones we don't need
>> ffmpeg:  ffdec_binkaudio_dct: FFmpeg Bink Audio (DCT) decoder
>> ffmpeg:  ffdec_binkaudio_rdft: FFmpeg Bink Audio (RDFT) decoder
>> ffmpeg:  ffdec_bmv_audio: FFmpeg Discworld II BMV audio decoder
> This is realaudio, which is probably not anything like as useful now as
> it was 5 years ago.
>> ffmpeg:  ffdec_cook: FFmpeg COOK decoder
> Two more fringe ones
>> ffmpeg:  ffdec_dca: FFmpeg DCA (DTS Coherent Acoustics) decoder
>> ffmpeg:  ffdec_dsicinaudio: FFmpeg Delphine Software International
>> CIN audio decoder
> * Important (reason for wanting ffmpeg in the first place)
>> ffmpeg:  ffdec_eac3: FFmpeg ATSC A/52B (AC-3, E-AC-3) decoder
> Duplicate, unlikely to want to use because 24-bit probably not working
>> ffmpeg:  ffdec_flac: FFmpeg FLAC (Free Lossless Audio Codec) decoder
> * These two are fairly important (reasons for wanting ffmpeg in the
>    first place) - phone audio
>> ffmpeg:  ffdec_gsm: FFmpeg GSM decoder
>> ffmpeg:  ffdec_gsm_ms: FFmpeg GSM Microsoft variant decoder
> Fringe, never heard of them
>> ffmpeg:  ffdec_imc: FFmpeg IMC (Intel Music Coder) decoder
>> ffmpeg:  ffdec_mace3: FFmpeg MACE (Macintosh Audio
>> Compression/Expansion) 3:1 decoder
>> ffmpeg:  ffdec_mace6: FFmpeg MACE (Macintosh Audio
>> Compression/Expansion) 6:1 decoder
>> ffmpeg:  ffdec_mlp: FFmpeg MLP (Meridian Lossless Packing) decoder
> These four are duplicates of existing libmad decoder - I don't know
> which is better.
>> ffmpeg:  ffdec_mp1float: FFmpeg MP1 (MPEG audio layer 1) decoder
>> ffmpeg:  ffdec_mp2float: FFmpeg MP2 (MPEG audio layer 2) decoder
>> ffmpeg:  ffdec_mp3: FFmpeg MP3 (MPEG audio layer 3) decoder
>> ffmpeg:  ffdec_mp3float: FFmpeg MP3 (MPEG audio layer 3) decoder
> I have no idea what these 4 are - presumably special cases!
>> ffmpeg:  ffdec_mp3adu: FFmpeg ADU (Application Data Unit) MP3 (MPEG
>> audio layer 3) decoder
>> ffmpeg:  ffdec_mp3adufloat: FFmpeg ADU (Application Data Unit) MP3
>> (MPEG audio layer 3) decoder
>> ffmpeg:  ffdec_mp3on4: FFmpeg MP3onMP4 decoder
>> ffmpeg:  ffdec_mp3on4float: FFmpeg MP3onMP4 decoder
> Fringe
>> ffmpeg:  ffdec_mpc7: FFmpeg Musepack SV7 decoder
>> ffmpeg:  ffdec_mpc8: FFmpeg Musepack SV8 decoder
>> ffmpeg:  ffdec_nellymoser: FFmpeg Nellymoser Asao decoder
>> ffmpeg:  ffdec_qcelp: FFmpeg QCELP / PureVoice decoder
>> ffmpeg:  ffdec_qdm2: FFmpeg QDesign Music Codec 2 decoder
> realaudio again, not priority
>> ffmpeg:  ffdec_real_144: FFmpeg RealAudio 1.0 (14.4K) decoder
>> ffmpeg:  ffdec_real_288: FFmpeg RealAudio 2.0 (28.8K) decoder
>> ffmpeg:  ffdec_shorten: FFmpeg Shorten decoder
>> ffmpeg:  ffdec_sipr: FFmpeg RealAudio SIPR / ACELP.NET decoder
> Fringe
>> ffmpeg:  ffdec_smackaud: FFmpeg Smacker audio decoder
>> ffmpeg:  ffdec_truehd: FFmpeg TrueHD decoder
>> ffmpeg:  ffdec_truespeech: FFmpeg DSP Group TrueSpeech decoder
>> ffmpeg:  ffdec_tta: FFmpeg True Audio (TTA) decoder
>> ffmpeg:  ffdec_twinvq: FFmpeg VQF TwinVQ decoder
>> ffmpeg:  ffdec_vmdaudio: FFmpeg Sierra VMD audio decoder
> * These two are fairly important (reasons for wanting ffmpeg in the
>    first place) - phone audio
>> ffmpeg:  ffdec_wmapro: FFmpeg Windows Media Audio 9 Professional
>> decoder ffmpeg:  ffdec_wmav1: FFmpeg Windows Media Audio 1 decoder
>> ffmpeg:  ffdec_wmav2: FFmpeg Windows Media Audio 2 decoder
>> ffmpeg:  ffdec_wmavoice: FFmpeg Windows Media Audio Voice decoder
> Fringe or duplicate of libsndfile - I doubt we will want to use any of
> these.
>> ffmpeg:  ffdec_ws_snd1: FFmpeg Westwood Audio (SND1) decoder
>> ffmpeg:  ffdec_pcm_lxf: FFmpeg PCM signed 20-bit little-endian planar
>> decoder
>> ffmpeg:  ffdec_pcm_s8_planar: FFmpeg PCM signed 8-bit planar decoder
>> ffmpeg:  ffdec_interplay_dpcm: FFmpeg DPCM Interplay decoder
>> ffmpeg:  ffdec_roq_dpcm: FFmpeg DPCM id RoQ decoder
>> ffmpeg:  ffdec_sol_dpcm: FFmpeg DPCM Sol decoder
>> ffmpeg:  ffdec_xan_dpcm: FFmpeg DPCM Xan decoder
>> ffmpeg:  ffdec_adpcm_4xm: FFmpeg ADPCM 4X Movie decoder
>> ffmpeg:  ffdec_adpcm_adx: FFmpeg SEGA CRI ADX ADPCM decoder
>> ffmpeg:  ffdec_adpcm_ct: FFmpeg ADPCM Creative Technology decoder
>> ffmpeg:  ffdec_adpcm_ea: FFmpeg ADPCM Electronic Arts decoder
>> ffmpeg:  ffdec_adpcm_ea_maxis_xa: FFmpeg ADPCM Electronic Arts Maxis
>> CDROM XA decoder
>> ffmpeg:  ffdec_adpcm_ea_r1: FFmpeg ADPCM Electronic Arts R1 decoder
>> ffmpeg:  ffdec_adpcm_ea_r2: FFmpeg ADPCM Electronic Arts R2 decoder
>> ffmpeg:  ffdec_adpcm_ea_r3: FFmpeg ADPCM Electronic Arts R3 decoder
>> ffmpeg:  ffdec_adpcm_ea_xas: FFmpeg ADPCM Electronic Arts XAS decoder
>> ffmpeg:  ffdec_g722: FFmpeg G.722 ADPCM decoder
>> ffmpeg:  ffdec_g726: FFmpeg G.726 ADPCM decoder
>> ffmpeg:  ffdec_adpcm_ima_amv: FFmpeg ADPCM IMA AMV decoder
>> ffmpeg:  ffdec_adpcm_ima_dk3: FFmpeg ADPCM IMA Duck DK3 decoder
>> ffmpeg:  ffdec_adpcm_ima_dk4: FFmpeg ADPCM IMA Duck DK4 decoder
>> ffmpeg:  ffdec_adpcm_ima_ea_eacs: FFmpeg ADPCM IMA Electronic Arts
>> EACS decoder
>> ffmpeg:  ffdec_adpcm_ima_ea_sead: FFmpeg ADPCM IMA Electronic Arts
>> SEAD decoder
>> ffmpeg:  ffdec_adpcm_ima_iss: FFmpeg ADPCM IMA Funcom ISS decoder
>> ffmpeg:  ffdec_adpcm_ima_qt: FFmpeg ADPCM IMA QuickTime decoder
>> ffmpeg:  ffdec_adpcm_ima_smjpeg: FFmpeg ADPCM IMA Loki SDL MJPEG
>> decoder ffmpeg:  ffdec_adpcm_ima_wav: FFmpeg ADPCM IMA WAV decoder
>> ffmpeg:  ffdec_adpcm_ima_ws: FFmpeg ADPCM IMA Westwood decoder
>> ffmpeg:  ffdec_adpcm_ms: FFmpeg ADPCM Microsoft decoder
>> ffmpeg:  ffdec_adpcm_sbpro_2: FFmpeg ADPCM Sound Blaster Pro 2-bit
>> decoder ffmpeg:  ffdec_adpcm_sbpro_3: FFmpeg ADPCM Sound Blaster Pro
>> 2.6-bit decoder ffmpeg:  ffdec_adpcm_sbpro_4: FFmpeg ADPCM Sound
>> Blaster Pro 4-bit decoder ffmpeg:  ffdec_adpcm_swf: FFmpeg ADPCM
>> Shockwave Flash decoder ffmpeg:  ffdec_adpcm_thp: FFmpeg ADPCM
>> Nintendo Gamecube THP decoder ffmpeg:  ffdec_adpcm_xa: FFmpeg ADPCM
>> CDROM XA decoder ffmpeg:  ffdec_adpcm_yamaha: FFmpeg ADPCM Yamaha
>> decoder ffmpeg:  ffdec_xsub: FFmpeg XSUB decoder
> Richard
>
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