Crash exporting WEBM with one audio channel

[Gregory Weber]

Ubuntu 12.04.1 LTS
OpenShot 1.4.3 installed by PPA
Melt 0.7.6+git20120

Principal input clip is an Ogg Theora file about which avprobe says that it is 1120x736 with one audio channel: Vorbus, 22050 Hz, mono, s16.

I want to export with the same audio characteristics.

Export settings:

Target: WEBM (vpx)
Video Profile: 1120x736 (aspect ratio 4:3, frame rate 15, pixel ratio 1:1, progressive)
Quality: Med

Advanced -- audio settings:
 sample rate 22050
  # of channels 1
  bit rate 128 kb/s

Soon after export begins, OpenShot crashes with these messages (some might have been from before the export started):

on_frmMain_key_press_event
on_mnuAbout_activate called with self.GtkImageMenuItem
on_aboutdialog1_close called with self.OpenShot
on_tlbMakeMovie_clicked called with self.GtkToolButton
on_cboExportType_changed
on_cboUploadServices_changed
on_cboProjectType_changed
on_cboExportTo_changed
on_btnExportVideo_clicked
NEW SDL CONSUMER
[theora @ 0x27ad2c0] 7 bits left in packet 82
[theora @ 0x47b5680] 7 bits left in packet 82
[theora @ 0x319ba00] 7 bits left in packet 82
[libvorbis @ 0x7f2d7045de20] oggvorbis_encode_init: init_encoder failed
consumer_avformat.c: Unable to encode audio - disabling audio output.
[webm @ 0x7f2d70000a40] Extradata corrupt.
Floating point exception (core dumped)

* * *

If I change # of channels to 2, and otherwise the same as above, it exports with no problem.

[Olivier Girard (eolinwen)]

Hi,

Just a thought : not sure that WebM use one channel.

Another thing more concrete : you seem to use an old (and knew as a buggy version) of MLT. Could you update it following this FAQ : https://answers.launchpad.net/openshot/+faq/1861

If you want the last version of MLT, you should use this PPA : https://launchpad.net/~sunab/+archive/kdenlive-svn
but be careful, it is a daily PPA so he can break your installation.

After that, try again.
Thxs.