On Thu, 2004-09-09 at 14:07, Eric Dantan Rzewnicki wrote: > Here is one way to be sure ecasound uses libsamplerate: > > ecasound -f:16,2,44100 -i:resample-hq,auto,hi-quality.wav -o:lower-quality.wav > > The resample-hq input object type, with the auto flag, is a special type > that causes ecasound to automatically read the format of the input .wav > and resample it using libsamplerate to match the format set for the rest > of the chain. I imagine the above command will fail if ecasound is not > compiled with src support. There is a similar resample object that uses > the internal linear interpolation. For both object types auto can be > replaced with the actual sample format if your input file format lacks > that info. One example would be raw input files. It ran, but it did not apparently downsample. Granted I took a mono file as input and wrote a stereo file out, but the output sample rate is still reported as 96K. I will try your 2-mono to stereo example in a minute. ecasound -f:16,2,44100 -i:resample-hq,auto, data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav -o:TEST1.wav **************************************************************************** * ecasound v2.3.3 (C) 1997-2004 Kai Vehmanen **************************************************************************** - [ Session created ] ------------------------------------------------------ - [ Chainsetup created (cmdline) ] ----------------------------------------- (eca-chainsetup-parser) Note! Interpreting option data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav as -i:data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav. - [ Connecting chainsetup ] ------------------------------------------------ (eca-chainsetup) 'nonrt' buffering mode selected. Warning: DBC_CHECK failed - "samples_per_second() > 0", audioio.cpp, 195. Warning: DBC_CHECK failed - "samples_per_second() > 0", audioio.cpp, 195. (eca-chainsetup) Audio object "", mode "read". (audio-io) Format: s16_le, channels 2, srate 44100, interleaved. (eca-chainsetup) Audio object "data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav", mode "read". (audio-io) Format: s24_le, channels 1, srate 96000, interleaved. (eca-chainsetup) Audio object "TEST1.wav", mode "read/write". (audio-io) Format: s16_le, channels 2, srate 96000, interleaved. - [ Chainsetup connected ] ------------------------------------------------- (eca-controller) Connected chainsetup: "command-line-setup". - [ Controller/Starting batch processing ] --------------------------------- - [ Engine init - Driver start ] ------------------------------------------- - [ Controller/Batch processing finished ] --------------------------------- - [ Engine exiting ] ------------------------------------------------------- (eca-controller) Disconnecting chainsetup: "command-line-setup". - [ Chainsetup disconnected ] ---------------------------------------------- flash mark $ flash mark $ sndfile-info TEST1.wav Version : libsndfile-1.0.10 ======================================== File : TEST1.wav Length : 81780116 RIFF : 81780104 WAVE fmt : 16 Format : 0x1 => WAVE_FORMAT_PCM Channels : 2 Sample Rate : 96000 Block Align : 4 Bit Width : 16 Bytes/sec : 384000 data : 81780072 End ---------------------------------------- Sample Rate : 96000 Frames : 20445018 Channels : 2 Format : 0x00010002 Sections : 1 Seekable : TRUE Duration : 00:03:32.968 Signal Max : 30318 (-0.67 dB) flash mark $ flash mark $ sndfile-info data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav Version : libsndfile-1.0.10 ======================================== File : data/GTSB-96K-24bit-Audio/T01-Startdust.L.wav Length : 61336078 RIFF : 61336070 WAVE bext : 602 fmt : 16 Format : 0x1 => WAVE_FORMAT_PCM Channels : 1 Sample Rate : 96000 Block Align : 3 Bit Width : 24 Bytes/sec : 288000 *** minf : 16 (unknown marker) *** elmo : 338 (unknown marker) data : 61175574 *** regn : 92 (unknown marker) *** ovwf : 159340 (unknown marker) *** umid : 24 (unknown marker) End ---------------------------------------- Sample Rate : 96000 Frames : 20391858 Channels : 1 Format : 0x00010003 Sections : 1 Seekable : TRUE Duration : 00:03:32.415 Signal Max : 4.20391e+06 (-6.00 dB) flash mark $
