507672 - Gapless playback of multiple <audio> tags?

Status: RESOLVED INACTIVE

(Core :: Audio/Video: Playback, enhancement)

Description

[Daniel Holth]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 (.NET CLR 3.5.30729)

I would like to be able to play several <audio> tags on a web page by calling the .play() method on one after the 'ended' event on another is fired. This causes very small gaps in playback.

Reproducible: Always

Comment 1

[Daniel Holth]

If gapless <audio> playback was possible then you could implement the following in the browser: http://tools.ietf.org/html/draft-pantos-http-live-streaming-01#page-11

Comment 2

[Biju]

do you have a test page to test it.

Comment 3

[Daniel Holth]

http://dingoskidneys.com/~dholth/gapful/

Expected: beautiful music
Actual: gaps in the music

No, I can't do any better by rearranging the JavaScript that plays the next section of the music. In Flash, gapless playback is approximated but never truly achieved by setting a high resolution timer to check when the sound is over.

I want to implement a player with excellent seeking by splitting audio into many small bits, but I can't do it in HTML.

Comment 4

[Biju]

conforming...

Comment 5

[Craig]

I only have a very short gap after the first ogg, the others are 100% smooth.
Tested on firefox 3.5.5/Gentoo Linux.

Comment 6

[Daniel Holth]

Craig, unfortunately that's just luck. Without a way to say 'this audio must come exactly after that one' there will always be some number of missed (or, in Chrome, overlapping!) samples between sound clips.

Comment 7

[Jim Porter (:squib)]

This would be really nice for the Firefox OS music player. Maybe we can prioritize it for the 1.4 time frame?

I looked at the Web Audio API, and unfortunately, there doesn't seem to be an easy way to handle this there, either. This might be a good opportunity for me to start hacking on the Gecko media code, provided I can find someone to help me get started.

Comment 8

[Jason Smith [:jsmith]]

Not a committed feature for 1.4, so clearing nom. If you want this prioritized in a team's backlog, then feel free to email the product team with the feature request.

Comment 9

[Nils Ohlmeier [:drno]]

Mass closing do to inactivity.
Feel free to re-open if still needed.