[Content Server Reader] Read Aloud issue

nqk · 08-04-2021, 11:31 AM

Dear Kovid,

On my mobile (Chrome, Android 11), I hit the Read aloud, a popup window appears, saying "Error: Speaking failed
An error has occurred with speech synthesis: synthesis-failed."

I remember it worked before, when you first intro this feature.

However, if I select texts (words or paragraphs) and use the Read aloud button on the action/behavior bar, it works

What do you think the reason could be?

kovidgoyal · 08-04-2021, 11:40 AM

Probably it's hitting some limit on the max size of read aloud text. There have been no changes to read aloud calibre side, so likely the mobile browsers have changed.

nqk · 08-04-2021, 12:53 PM

You are right. There is a limit, but the limit is 4 pages (Calibre count). I tried chapters of 4-3-2 pages, the read-aloud was ok, but not if longer than that.

Any suggestions?

kovidgoyal · 08-04-2021, 01:19 PM

According to this: https://developer.mozilla.org/en-US/...Utterance/text

the limit is 32K characters which calibre already respects. If you can find some reference for a smaller limit, I can change it to that. Or you can experiment yourself, see the function speak_marked_text in tts.pyj

nqk · 08-04-2021, 11:24 PM

Literally I have no idea what that means.

If Calibre can't handle this for technical reasons, I hope it will in the future. For now, I will use Reasily or Moon+ Reader to read the ebooks for me. It is not prioritized anyway.

Thank you.

kovidgoyal · 08-05-2021, 01:38 AM

That will take care of it: https://github.com/kovidgoyal/calibr...1929a1ac949496

nqk · 08-05-2021, 02:20 AM

Thank you Kovid.

08-04-2021, 11:31 AM	#1
nqk Fanatic Posts: 568 Karma: 32228 Join Date: Feb 2012 Device: Onyx Boox Leaf	[Content Server Reader] Read Aloud issue Dear Kovid, On my mobile (Chrome, Android 11), I hit the Read aloud, a popup window appears, saying "Error: Speaking failed An error has occurred with speech synthesis: synthesis-failed." I remember it worked before, when you first intro this feature. However, if I select texts (words or paragraphs) and use the Read aloud button on the action/behavior bar, it works What do you think the reason could be?

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08-04-2021, 11:40 AM	#2
kovidgoyal creator of calibre Posts: 45,600 Karma: 28548974 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Probably it's hitting some limit on the max size of read aloud text. There have been no changes to read aloud calibre side, so likely the mobile browsers have changed.

08-04-2021, 12:53 PM	#3
nqk Fanatic Posts: 568 Karma: 32228 Join Date: Feb 2012 Device: Onyx Boox Leaf	You are right. There is a limit, but the limit is 4 pages (Calibre count). I tried chapters of 4-3-2 pages, the read-aloud was ok, but not if longer than that. Any suggestions?

08-04-2021, 01:19 PM	#4
kovidgoyal creator of calibre Posts: 45,600 Karma: 28548974 Join Date: Oct 2006 Location: Mumbai, India Device: Various	According to this: https://developer.mozilla.org/en-US/...Utterance/text the limit is 32K characters which calibre already respects. If you can find some reference for a smaller limit, I can change it to that. Or you can experiment yourself, see the function speak_marked_text in tts.pyj

08-04-2021, 11:24 PM	#5
nqk Fanatic Posts: 568 Karma: 32228 Join Date: Feb 2012 Device: Onyx Boox Leaf	Literally I have no idea what that means. If Calibre can't handle this for technical reasons, I hope it will in the future. For now, I will use Reasily or Moon+ Reader to read the ebooks for me. It is not prioritized anyway. Thank you.

08-05-2021, 01:38 AM	#6
kovidgoyal creator of calibre Posts: 45,600 Karma: 28548974 Join Date: Oct 2006 Location: Mumbai, India Device: Various	That will take care of it: https://github.com/kovidgoyal/calibr...1929a1ac949496

08-05-2021, 02:20 AM	#7
nqk Fanatic Posts: 568 Karma: 32228 Join Date: Feb 2012 Device: Onyx Boox Leaf	Thank you Kovid.

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