No sound / no properly export

[etraveler]

Hi,

After regular usage of the Avidemux 2-7-1 on last Fiday (10.12) I start into the following problem:
 I open the .webm file with Avidemux, but the video is incorrectly read (without sound), although in the sound bar I see moving.
 If I reopen the file with VLC or Windows Media Player, the video runs with the sound correctly.
 If I write the video in any format, the file is not readable.

My problem: I want the sound to be in Avidemux and write the file as readable video file.

Thanks for your time

[eumagga0x2a]

Anything older than the last release (2.7. is absolutely unsupported, all issues with the last release need to be validated against the latest 2.8.0 nightly builds. 2.7.1 is over 3 years old.