I'm trying to send a voice message through SendVoice method in telegram bot, but it sends the voice as a document file (not play).
ogg file by ffmpeg converted to opus encoding.
https://api.telegram.org/bot<token>/sendVoice?chat_id=x&voice=http://music-farsi.ir/ogg/voice.ogg
What is the difference between the my ogg file and telegram voice message?
My ogg file: ogg file
Thanks to YoilyL I'm able to send voice messages with the spectrogram.
Here's my python script which converts my .wav file to .ogg:
import os
import requests
import subprocess
token = YYYYYYY
chat_id = XXXXXXXX
upload_audio_url = "https://api.telegram.org/bot%s/sendAudio?chat_id=%s" % (token, chat_id)
audio_path_wav = '/Users/me/some-file.wav'
# Convert the file from wav to ogg
filename = os.path.splitext(audio_path_wav)[0]
audio_path_ogg = filename + '.ogg'
subprocess.run(["ffmpeg", '-i', audio_path_wav, '-acodec', 'libopus', audio_path_ogg, '-y'])
with open(audio_path_ogg, 'rb') as f:
data = f.read()
# An arbitrary .ogg filename has to be present so that the spectogram is shown
file = {'audio': ('Message.ogg', data)}
result = requests.post(upload_audio_url, files=file)
This results in the following rendering of the voice message:
You'll need to install ffmpeg using the package manager of your choice.
Telegram has two APIs for sending Audio files: sendVoice and sendAudio
To have spectrogram, you need to use the sendVoice API.
Use this method to send audio files, if you want Telegram clients to display the file as a playable voice message. For this to work, your audio must be in an .OGG file encoded with OPUS (other formats may be sent as Audio or Document). On success, the sent Message is returned. Bots can currently send voice messages of up to 50 MB in size, this limit may be changed in the future.
Also, note the other limitations thats mentioned in the docs:
To use sendVoice, the file must have the type audio/ogg and be no more than 1MB in size. 1-20MB voice notes will be sent as files.
Therefore, if you send a ogg file in opus format that is less than 1MB in size, you will get spectogram. If the ogg file is larger than 1MB, it will be still uploaded as a voice however with no spectogram bars.
You can use ffmpeg in linux with a low bitrate to reduce the size of your file:
ffmpeg -i input.mp3 -vn -acodec libopus -b:a 16k audio.ogg
Here is a sample python code that uses to send a sample ogg file to a channel using sendVoice
import os, sys
import requests
# Bot token
token = ''
if len(sys.argv) <=1:
print("Usage: send_voice.py destchannelid filename")
print("\te.g.")
print("\tsend_voice.py -10011111111 audio.ogg")
print("Convert audio files to ogg using the following command")
print("ffmpeg -i input.mp3 -vn -acodec libopus -b:a 16k audio.ogg")
exit()
upload_audio_url = "https://api.telegram.org/bot{}/sendVoice?chat_id={}".format(token,chat_id)
audio_path_ogg = os.getcwd() + "/" + sys.argv[2]
with open(audio_path_ogg, 'rb') as f:
data = f.read()
file = {'voice': ('Message.ogg', data)}
result = requests.post(upload_audio_url, files=file)
print(result.content)
if you want it to display the audio spectrogram, make sure the ogg is encoded with opus codec
