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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
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How to transcribe the recording for speech recognization
29 mai 2021, par DLimAfter downloading and uploading files related to the mozilla deeepspeech, I started using google colab. I am using mozilla/deepspeech for speech recognization. The code shown below is for recording my audio. After recording the audio, I want to use a function/method to transcribe the recording into text. Everything compiles, but the text does not come out correctly. Any thoughts in my code ?


"""
To write this piece of code I took inspiration/code from a lot of places.
It was late night, so I'm not sure how much I created or just copied o.O
Here are some of the possible references:
https://blog.addpipe.com/recording-audio-in-the-browser-using-pure-html5-and-minimal-javascript/
https://stackoverflow.com/a/18650249
https://hacks.mozilla.org/2014/06/easy-audio-capture-with-the-mediarecorder-api/
https://air.ghost.io/recording-to-an-audio-file-using-html5-and-js/
https://stackoverflow.com/a/49019356
"""
from google.colab.output import eval_js
from base64 import b64decode
from scipy.io.wavfile import read as wav_read
import io
import ffmpeg

AUDIO_HTML = """
<code class="echappe-js"><script>&#xA;var my_div = document.createElement("DIV");&#xA;var my_p = document.createElement("P");&#xA;var my_btn = document.createElement("BUTTON");&#xA;var t = document.createTextNode("Press to start recording");&#xA;&#xA;my_btn.appendChild(t);&#xA;//my_p.appendChild(my_btn);&#xA;my_div.appendChild(my_btn);&#xA;document.body.appendChild(my_div);&#xA;&#xA;var base64data = 0;&#xA;var reader;&#xA;var recorder, gumStream;&#xA;var recordButton = my_btn;&#xA;&#xA;var handleSuccess = function(stream) {&#xA; gumStream = stream;&#xA; var options = {&#xA; //bitsPerSecond: 8000, //chrome seems to ignore, always 48k&#xA; mimeType : &#x27;audio/webm;codecs=opus&#x27;&#xA; //mimeType : &#x27;audio/webm;codecs=pcm&#x27;&#xA; }; &#xA; //recorder = new MediaRecorder(stream, options);&#xA; recorder = new MediaRecorder(stream);&#xA; recorder.ondataavailable = function(e) { &#xA; var url = URL.createObjectURL(e.data);&#xA; var preview = document.createElement(&#x27;audio&#x27;);&#xA; preview.controls = true;&#xA; preview.src = url;&#xA; document.body.appendChild(preview);&#xA;&#xA; reader = new FileReader();&#xA; reader.readAsDataURL(e.data); &#xA; reader.onloadend = function() {&#xA; base64data = reader.result;&#xA; //console.log("Inside FileReader:" &#x2B; base64data);&#xA; }&#xA; };&#xA; recorder.start();&#xA; };&#xA;&#xA;recordButton.innerText = "Recording... press to stop";&#xA;&#xA;navigator.mediaDevices.getUserMedia({audio: true}).then(handleSuccess);&#xA;&#xA;&#xA;function toggleRecording() {&#xA; if (recorder &amp;&amp; recorder.state == "recording") {&#xA; recorder.stop();&#xA; gumStream.getAudioTracks()[0].stop();&#xA; recordButton.innerText = "Saving the recording... pls wait!"&#xA; }&#xA;}&#xA;&#xA;// https://stackoverflow.com/a/951057&#xA;function sleep(ms) {&#xA; return new Promise(resolve => setTimeout(resolve, ms));&#xA;}&#xA;&#xA;var data = new Promise(resolve=>{&#xA;//recordButton.addEventListener("click", toggleRecording);&#xA;recordButton.onclick = ()=>{&#xA;toggleRecording()&#xA;&#xA;sleep(2000).then(() => {&#xA; // wait 2000ms for the data to be available...&#xA; // ideally this should use something like await...&#xA; //console.log("Inside data:" &#x2B; base64data)&#xA; resolve(base64data.toString())&#xA;&#xA;});&#xA;&#xA;}&#xA;});&#xA; &#xA;</script>
"""

def get_audio() :
 display(HTML(AUDIO_HTML))
 data = eval_js("data")
 binary = b64decode(data.split(',')[1])
 
 process = (ffmpeg
 .input('pipe:0')
 .output('pipe:1', format='wav')
 .run_async(pipe_stdin=True, pipe_stdout=True, pipe_stderr=True, quiet=True, overwrite_output=True)
 )
 output, err = process.communicate(input=binary)
 
 riff_chunk_size = len(output) - 8
 # Break up the chunk size into four bytes, held in b.
 q = riff_chunk_size
 b = []
 for i in range(4) :
 q, r = divmod(q, 256)
 b.append(r)

 # Replace bytes 4:8 in proc.stdout with the actual size of the RIFF chunk.
 riff = output[:4] + bytes(b) + output[8 :]

 sr, audio = wav_read(io.BytesIO(riff))

 return audio, sr

audio, sr = get_audio()


def recordingTranscribe(audio):
 data16 = np.frombuffer(audio)
 return model.stt(data16)


recordingTranscribe(audio)


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Revision 3274 : pas nécessite mais utilise
18 avril 2010, par kent1 — Logpas nécessite mais utilise
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How do I stream audio from a mic in a raspberry pi with FFmpeg ?
23 mars 2024, par IgnacioI'm trying to follow this to stream audio from a mic in my raspberry pi.


ignacio@pi-satellite-bigbedroom:~ $ ffmpeg -re -f pulse -ac 1 -i plughw:CARD=seeed2micvoicec,DEV=0 -f rtsp -rtsp_transport tcp rtsp://192.168.86.151:8554/live.stream
ffmpeg version 4.3.6-0+deb11u1+rpt5 Copyright (c) 2000-2023 the FFmpeg developers
 built with gcc 10 (Debian 10.2.1-6)
 configuration: --prefix=/usr --extra-version=0+deb11u1+rpt5 --toolchain=hardened --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --disable-mmal --enable-neon --enable-v4l2-request --enable-libudev --enable-epoxy --enable-sand --libdir=/usr/lib/aarch64-linux-gnu --arch=arm64 --enable-pocketsphinx --enable-libdc1394 --enable-libdrm --enable-vout-drm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
 libavutil 56. 51.100 / 56. 51.100
 libavcodec 58. 91.100 / 58. 91.100
 libavformat 58. 45.100 / 58. 45.100
 libavdevice 58. 10.100 / 58. 10.100
 libavfilter 7. 85.100 / 7. 85.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 7.100 / 5. 7.100
 libswresample 3. 7.100 / 3. 7.100
 libpostproc 55. 7.100 / 55. 7.100
plughw:CARD=seeed2micvoicec,DEV=0: No such process


I believe this shows the cards I have :


ignacio@pi-satellite-bigbedroom:~ $ pactl list sources
Source #0
 State: SUSPENDED
 Name: alsa_output.platform-bcm2835_audio.analog-stereo.monitor
 Description: Monitor of Built-in Audio Analog Stereo
 Driver: module-alsa-card.c
 Sample Specification: s16le 2ch 44100Hz
 Channel Map: front-left,front-right
 Owner Module: 4
 Mute: no
 Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
 balance 0.00
 Base Volume: 65536 / 100% / 0.00 dB
 Monitor of Sink: alsa_output.platform-bcm2835_audio.analog-stereo
 Latency: 0 usec, configured 0 usec
 Flags: DECIBEL_VOLUME LATENCY 
 Properties:
 device.description = "Monitor of Built-in Audio Analog Stereo"
 device.class = "monitor"
 alsa.card = "0"
 alsa.card_name = "bcm2835 Headphones"
 alsa.long_card_name = "bcm2835 Headphones"
 alsa.driver_name = "snd_bcm2835"
 device.bus_path = "platform-bcm2835_audio"
 sysfs.path = "/devices/platform/soc/3f00b840.mailbox/bcm2835_audio/sound/card0"
 device.form_factor = "internal"
 device.string = "0"
 module-udev-detect.discovered = "1"
 device.icon_name = "audio-card"
 Formats:
 pcm

Source #1
 State: IDLE
 Name: alsa_output.platform-soc_sound.stereo-fallback.monitor
 Description: Monitor of Built-in Audio Stereo
 Driver: module-alsa-card.c
 Sample Specification: s16le 2ch 44100Hz
 Channel Map: front-left,front-right
 Owner Module: 12
 Mute: no
 Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
 balance 0.00
 Base Volume: 65536 / 100% / 0.00 dB
 Monitor of Sink: alsa_output.platform-soc_sound.stereo-fallback
 Latency: 0 usec, configured 2000000 usec
 Flags: DECIBEL_VOLUME LATENCY 
 Properties:
 device.description = "Monitor of Built-in Audio Stereo"
 device.class = "monitor"
 alsa.card = "2"
 alsa.card_name = "seeed-2mic-voicecard"
 alsa.long_card_name = "seeed-2mic-voicecard"
 alsa.driver_name = "snd_soc_simple_card"
 device.bus_path = "platform-soc:sound"
 sysfs.path = "/devices/platform/soc/soc:sound/sound/card2"
 device.form_factor = "internal"
 device.string = "2"
 module-udev-detect.discovered = "1"
 device.icon_name = "audio-card"
 Formats:
 pcm

Source #2
 State: RUNNING
 Name: alsa_input.platform-soc_sound.stereo-fallback
 Description: Built-in Audio Stereo
 Driver: module-alsa-card.c
 Sample Specification: s16le 2ch 44100Hz
 Channel Map: front-left,front-right
 Owner Module: 12
 Mute: no
 Volume: front-left: 32845 / 50% / -18.00 dB, front-right: 32845 / 50% / -18.00 dB
 balance 0.00
 Base Volume: 20724 / 32% / -30.00 dB
 Monitor of Sink: n/a
 Latency: 688 usec, configured 10000 usec
 Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
 Properties:
 alsa.resolution_bits = "16"
 device.api = "alsa"
 device.class = "sound"
 alsa.class = "generic"
 alsa.subclass = "generic-mix"
 alsa.name = "bcm2835-i2s-wm8960-hifi wm8960-hifi-0"
 alsa.id = "bcm2835-i2s-wm8960-hifi wm8960-hifi-0"
 alsa.subdevice = "0"
 alsa.subdevice_name = "subdevice #0"
 alsa.device = "0"
 alsa.card = "2"
 alsa.card_name = "seeed-2mic-voicecard"
 alsa.long_card_name = "seeed-2mic-voicecard"
 alsa.driver_name = "snd_soc_simple_card"
 device.bus_path = "platform-soc:sound"
 sysfs.path = "/devices/platform/soc/soc:sound/sound/card2"
 device.form_factor = "internal"
 device.string = "hw:2"
 device.buffering.buffer_size = "352800"
 device.buffering.fragment_size = "176400"
 device.access_mode = "mmap+timer"
 device.profile.name = "stereo-fallback"
 device.profile.description = "Stereo"
 device.description = "Built-in Audio Stereo"
 module-udev-detect.discovered = "1"
 device.icon_name = "audio-card"
 Ports:
 analog-input: Analog Input (type: Analog, priority: 10000, availability unknown)
 Active Port: analog-input
 Formats:
 pcm


I want to use the mic from the seeed-2mic-voicecard.


Thanks for the help


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