I'm using kdenlive 15.12.3-1 on debian testing. I've got a recording with ac3 Audio and 5.1(side) channel layout. I can see that kdenlive recognizes the 6 audio channels after enabling Timeline->Thumbnails->Separate channels in the settings. But when I render the project (e.g. with the H.264/AAC fast profile) the audio is downmixed to stereo. Reproducible: Always Steps to Reproduce: 1. Open video with 5.1(side) audio 2. Render the project with the H.264/AAC fast profile 3. Examine the audio channel layout of the rendered file, e.g. with ffmpeg Actual Results: The rendered file has got stereo audio. Expected Results: The rendered file should have 5.1(side) audio, i.e. the same channel layout as the source files.
I managed to get 6ch audio by modifying the render parameters to include: channels=6 and for AC3 audio add acodec=ac3 As an example I modified the H.264/AAC high profile: properties=x264-medium g=120 crf=%quality acodec=ac3 ab=%audiobitrate+'k' channels=6
(In reply to Don from comment #1) > I managed to get 6ch audio by modifying the render parameters to include: > channels=6 and for AC3 audio add acodec=ac3 Thank you. That's a nice workaround but ideally kdenlive should do that by default. At least, there should be a drop-down menu (or something similar) to select stereo/5.1(side) in the render dialog, i.e. without modifying a preset.
Moved to phabricator. https://phabricator.kde.org/T9862