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Maniphest T46449

Blender VSE does not import all audio tracks on mp4.
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Description

System Information
Windows 10
Nvidea 970

Blender Version
Broken: 2.75a c27589e

Short description of error

Created a new mp4 which has 1 video track and 2 audio tracks. Only 1 video and 1 audio track added to Blender. Did not import second audio track.
Blender imported the first video track each time, it does not randomly select one of the two.

I have been able to listen to both track 1 and 2 (one at a time/separately) during VLC playback of the OBS-MP recorded mp4.

Exact steps for others to reproduce the error

  • Create mp4 with 2 audio tracks (I used OBS-MP)
  • Drag and drop into blender VSE timeline

Screenshots of Blender time line with imported video and video information from VLC below.


Related Objects

Event Timeline

Matt Robineau (baremutation) created this task.Oct 12 2015, 6:56 AM
Matt Robineau (baremutation) raised the priority of this task from to 90.
Matt Robineau (baremutation) updated the task description. (Show Details)
Matt Robineau (baremutation) added a project: BF Blender.
Matt Robineau (baremutation) edited a custom field.
Matt Robineau (baremutation) added a project: Video Sequencer.
Matt Robineau (baremutation) added a subscriber: Matt Robineau (baremutation).

Used incorrect project while creating report, cannot edit with correct project. Should be Video Sequencer instead of BF Blender

Campbell Barton (campbellbarton) assigned this task to Sergey Sharybin (sergey).Oct 12 2015, 7:01 AM
Campbell Barton (campbellbarton) lowered the priority of this task from 90 to 30.
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

Please include a (small) MP4 file that has this problem.

Carlo Andreacchio (candreacchio) added a subscriber: Carlo Andreacchio (candreacchio).Oct 12 2015, 7:55 AM

Test MP4 created, two streams visible in VLC, one stream only for VSE

Dealga McArdle (zeffii) added a subscriber: Dealga McArdle (zeffii).Oct 14 2015, 10:31 PM
Sergey Sharybin (sergey) changed the task status from Unknown Status to Unknown Status.Oct 15 2015, 6:53 PM

This isn't really a bug, just the code is not ready to support multiple audio tracks currently and being hardcoded to sue first audio track only.

So thanks for the report, but moving it to TODO now: http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Editors#Video_Sequencer

Philipp Oeser (lichtwerk) mentioned this in T55366: Blender development todo list -- Editors.Jun 7 2018, 2:37 PM
Matthew Laukala (Matlauk) added a subscriber: Matthew Laukala (Matlauk).Aug 10 2019, 2:19 AM

Has this been addressed at all?