Can't select mp4 encoder settings

Bug #1594043 reported by Rosen Penev on 2016-06-18
This bug affects 3 people
Affects Status Importance Assigned to Milestone
rhythmbox (Ubuntu)

Bug Description

Selecting mp4 while trying to encode files to an ipod results in an "Ubuntu" preset being applied and grayed out. I could control the settings in Fedora and Arch but not Ubuntu.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: rhythmbox 3.3-1ubuntu7
ProcVersionSignature: Ubuntu 4.4.0-24.43-generic 4.4.10
Uname: Linux 4.4.0-24-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Jun 18 16:36:45 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-05-03 (46 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: rhythmbox
UpgradeStatus: No upgrade log present (probably fresh install)

Rosen Penev (rosenp) wrote :
rithik g (gkrithi) wrote :

what version of fedora and arch has options for mp4 encoding ?

I haven't seen them and don't seen them in recent fedora ( FC27 ) and arch ( 2017 ) releases, either.

Thanks !

Rosen Penev (rosenp) wrote :

I think this was on fedora 25. Maybe 24.

I don't use Linux anymore(this laptop sucks).

rithik g (gkrithi) wrote :

Below is the case for Fedora ( and possibly arch ), which use faac encoder.

[rem@fc25 ~]$ gst-inspect-1.0 | grep -i aac
faac: faac: AAC audio encoder
faad: faad: AAC audio decoder

[rem@fc25 ~]$ gst-inspect-1.0 faac
  quality : Variable bitrate (VBR) quantizer quality in %
                        flags: readable, writable
                        Integer. Range: 1 - 1000 Default: 100

  bitrate : Average Bitrate (ABR) in bits/sec
                        flags: readable, writable
                        Integer. Range: 8000 - 320000 Default: 128000

which supports cbr and vbr, and hence their gstreamer profiles. Refer to below attachments.

rithik g (gkrithi) wrote :

Rhythmbox in FC25 with faac encoder installed.

rithik g (gkrithi) wrote :
rithik g (gkrithi) wrote :

whereas with debian and its derivatives ( Ubuntu / Mint ), aac encoder from libav is used.


rem@debian:~$ gst-inspect-1.0 | grep -i aac
libav: avenc_aac: libav AAC (Advanced Audio Coding) encoder
libav: avdec_aac: libav AAC (Advanced Audio Coding) decoder

rem@debian:~$ gst-inspect-1.0 avenc_aac
  bitrate : Target Audio Bitrate
                        flags: readable, writable
                        Integer. Range: 0 - 2147483647 Default: 0

I guess from the above, libav's aac encoder supports only default configuration. Can't see a quality element property here.

rithik g (gkrithi) wrote :

Tried manually compiling libfaac and copying it to /usr/lib/x86_64-linux-gnu/gstreamer-1.0/

Now debian lists faac too

rem@debian:~$ gst-inspect-1.0 | grep -i aac
faac: faac: AAC audio encoder

Now, CBR / VBR profiles are now visible in Rhythmbox ( debian ) and hence should be in Rhythmbox ( ubuntu ) too.

So, the conclusion is that bug scope is outside of Rhythmbox ( Ubuntu )

rithik g (gkrithi) wrote :

By manually compiling libfaac I meant the gstreamer faac from gst-plugins-bad located in


not libfaac, which should anyway be installed as part of build dependency for gstreamer faac, as below:

# apt-get install libfaac-dev

The following additional packages will be installed:
The following NEW packages will be installed:
  libfaac-dev libfaac0
0 upgraded, 2 newly installed, 0 to remove and 72 not upgraded.
Need to get 96.7 kB of archives.
After this operation, 381 kB of additional disk space will be used.
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Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in rhythmbox (Ubuntu):
status: New → Confirmed
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