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News:

Rockbox Ports are now being developed for various digital audio players!

+  Rockbox Technical Forums
|-+  Support and General Use
| |-+  Audio Playback, Database and Playlists
| | |-+  Podcast related functionality
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Author Topic: Podcast related functionality  (Read 1780 times)

Offline aluchko

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Podcast related functionality
« on: January 05, 2015, 01:57:33 AM »
I use my player almost exclusively for podcasts and was wondering if there was a way to get a couple of the features I really enjoy on the Android podcast app I use.

1) Variable playback speed: I like to speed up my podcasts somewhere between 1.5-2.0x, and I like to have this set per podcast feed. Is this doable? I know there's a pitch setting but that also changes the pitch and I don't know how that would be set per podcast series.

2) Auto-delete on finish: I never run into a scenario where I finish and want to relisten, and if I do I can just re-download. Ideally a podcast would delete automatically when I finish or when I skip after being 90% of the way through.

Are these things possible?
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Offline [Saint]

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Re: Podcast related functionality
« Reply #1 on: January 05, 2015, 04:33:07 PM »
Quote from: aluchko on January 05, 2015, 01:57:33 AM
1) Variable playback speed: I like to speed up my podcasts somewhere between 1.5-2.0x, and I like to have this set per podcast feed. Is this doable? I know there's a pitch setting but that also changes the pitch and I don't know how that would be set per podcast series.

Yes. This is possible.

It requires the use of two of Rockbox's features, the Pitch Screen;

From section 4.3.3 of our fine manual - The WPS Context Menu:

Quote
Pitch

The Pitch Screen allows you to change the rate of playback (i.e. the playback speed
and at the same time the pitch) of your player. The rate value can be adjusted between
50% and 200%. 50% means half the normal playback speed and a pitch that is an octave
lower than the normal pitch. 200% means double playback speed and a pitch that is an
octave higher than the normal pitch.
The rate can be changed in two modes: procentual and semitone. Initially, procentual
mode is active.
If you’ve enabled the Timestretch option in Sound Settings and have since rebooted,
you can also use timestretch mode. This allows you to change the playback
speed without affecting the pitch, and vice versa.
In timestretch mode there are separate displays for pitch and speed, and each can be
altered independently. Due to the limitations of the algorithm, speed is limited to be
between 35% and 250% of the current pitch value. Pitch must maintain the same ratio
as well as remain between 50% and 200%.
The value of the rate, pitch and speed is not persistent, i.e. after the player is turned
on it will always be set to 100%. However, the rate, pitch and speed information will be
stored in any bookmarks you may create (see section 8.7 (page 76)) and will be restored
upon playing back those bookmarks.


And Timestretch;

From section 6.11 of our fine manual - Timestratch:

Quote
6.11. Timestretch

Enabling Timestretch allows you to change the playback speed without it affecting
the pitch of the recording. After enabling this feature and rebooting, you can access
this via the Pitch Screen. This function is intended for speech playback and may
significantly dilute your listening experience with more complex audio. See section 4.3.3
(page 35) for more details about how to use the feature


Quote from: aluchko on January 05, 2015, 01:57:33 AM
2) Auto-delete on finish: I never run into a scenario where I finish and want to relisten, and if I do I can just re-download. Ideally a podcast would delete automatically when I finish or when I skip after being 90% of the way through.

No. This is not possible.

I hope this is of assistance to you.


[Saint]
« Last Edit: January 05, 2015, 04:37:22 PM by [Saint] »
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Using PMs to annoy devs about bugs/patches is not a good way to have the issue looked at.

Offline aluchko

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Re: Podcast related functionality
« Reply #2 on: January 06, 2015, 03:09:00 AM »
Thanks for the info on Timestretch, I'm a bit confused about how to save the values though. From the manual:

Quote
The value of the rate, pitch and speed is not persistent, i.e. after the player is turned
on it will always be set to 100%. However, the rate, pitch and speed information will be
stored in any bookmarks you may create (see section 8.7 (page 76)) and will be restored
upon playing back those bookmarks.

So it sounds like if I have bookmarks enabled the speed setting I set for that file should persist to the next startup.

However, when I start a podcast, set the speed, stop the podcast (so the bookmark is created), reboot the player, and restart the podcast the speed (and pitch) are both reset to 100%.

Am I missing a setting to enable this somewhere?
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Offline redeyedzhaan

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Re: Podcast related functionality
« Reply #3 on: January 15, 2015, 01:13:59 PM »
Quote
2) Auto-delete on finish: I never run into a scenario where I finish and want to relisten, and if I do I can just re-download. Ideally a podcast would delete automatically when I finish or when I skip after being 90% of the way through.

Are these things possible?

Quote
No. This is not possible.

True, not possible, but you can approximate it by using the "Queue" feature (instead of Insert) to add the tracks to your playlist so that the track will be removed from the current playlist when you are done listening to it.  Doesn't delete the file, so you still need to do that manually, but it's something I've found useful to streamline podcast listening.

Quote
So it sounds like if I have bookmarks enabled the speed setting I set for that file should persist to the next startup.

However, when I start a podcast, set the speed, stop the podcast (so the bookmark is created), reboot the player, and restart the podcast the speed (and pitch) are both reset to 100%.

I've run into the same thing, and have never been able to figure out how to keep it set at the speed I want.  Once it is rebooted, it always seems to go back to 100%, regardless of bookmarks.  If there's a way, I'm unaware of it.
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