Feature request: QCLP (Qualcomm Purevoice) Audio Codec support

[komputes]

Binary package hint: gstreamer0.10-plugins-good

The audio codec "x-gst-fourcc-Qclp" is not recognized by gstreamer, but is well recognized by ffmpeg (used by mplayer and vlc). The Codec is QCLP(Qualcomm Purevoice) Audio which you can read more about here: http://wiki.multimedia.cx/index.php?title=QCELP

Steps to reproduce:
The video source is http://cyberchinese-online.com/media/video/pcr/L_1.mov
1) Go to URL
2) You are proposed to download a codec
3) Codec not found - No sound in Quicktime movie: missing codec x-gst-fourcc-Qclp

Expected:
Codec should be supported by gstreamer. ffmpeg/vlc is able to read the file without any issues.

[komputes (komputes)]

More information:
http://en.wikipedia.org/wiki/QCELP
http://wiki.multimedia.cx/index.php?title=QCELP

QCELP (Qualcomm Code Excited Linear Prediction), also known as Qualcomm PureVoice, is a speech codec developed in 1994 to increase the speech quality of the IS-96A codec used earlier in CDMA networks. It was replaced later with EVRC since it provides better speech quality with fewer bits. There are two versions available: QCELP8 and QCELP13 and they use 8 and 13 Kbit/s respectively.

This audio codec is not recognized by gstreamer, but is well recognized by ffmpeg (used by mplayer and vlc).

There is no codec pack or application that is able to view these files.

Example Content:
http://cyberchinese-online.com/media/video/pcr/L_1.mov

Current Result:
Plays video but audio is muted

Expected result:
Plays both audio and video in sync, with no delay.

Current workarround:
1) Select the totem-mozilla package for installation
2) Select to uninstall mozilla-mplayer
-OR-
If you have the actual file, open it in mplayer.

This bug is a request to include the QCLP audio codec to a gstreamer plugin pack. If there are any issues (legal or otherwise parties) with doing this please comment on this bug.

Tested on:
i386, Ubuntu Desktop 9.10, Linux 2.6.31-15

[Pady92 (pady92-gmail)]

I would like to code a codec for this issue. Any suggestions how hard this would be to implement? (I am a noob in Multimedia programming). any pointers other than the format descriptions posted above would be appreciated.

[Pady92 (pady92-gmail)]

I had a look at the links given above. looks like my totem(gst-0.10) plays the samples on that page fine. Think this bug relates to fourcc+qcelp(one on .mov files)
http://wiki.multimedia.cx/index.php?title=MOV#Audio_FOURCCs