AW: AW: AW: AW: Question about decodebin and prerolling
Bernhard Graaf
bernhard.graaf at gmx.de
Thu Dec 20 18:17:09 UTC 2018
Mp4mux is supporting these audio formats (gst-inspect-1.0 mp4mux):
SINK template: 'audio_%u'
Availability: On request
Capabilities:
audio/mpeg
mpegversion: 1
layer: [ 1, 3 ]
channels: [ 1, 2 ]
rate: [ 1, 2147483647 ]
audio/mpeg
mpegversion: 4
stream-format: raw
channels: [ 1, 8 ]
rate: [ 1, 2147483647 ]
audio/x-ac3
channels: [ 1, 6 ]
rate: [ 1, 2147483647 ]
audio/x-alac
channels: [ 1, 2 ]
rate: [ 1, 2147483647 ]
audio/x-opus
channel-mapping-family: [ 0, 255 ]
channels: [ 1, 8 ]
rate: [ 1, 2147483647 ]
Therefore you should use avenc_ac3
-----Ursprüngliche Nachricht-----
Von: gstreamer-devel [mailto:gstreamer-devel-bounces at lists.freedesktop.org]
Im Auftrag von Russel Winder
Gesendet: Donnerstag, 20. Dezember 2018 20:07
An: Discussion of the development of and with GStreamer
Betreff: Re: AW: AW: AW: Question about decodebin and prerolling
On Thu, 2018-12-20 at 18:41 +0100, Bernhard Graaf wrote:
> Audioencoder is only a synonymous for what encoder you want to use (mpgeg,
> ac3, and so on).
>
I had been hoping it was a smart element working according to the format of
input, otherwise you have to know ahead of time what formats are in use.
As it happens the test file has a52 format, and the MPEG-4 file should have
AAC (I believe, this is not a fact!) Whilst there is an a52dec element, the
faac element is not in the bad plugin as reported at
https://gstreamer.freedesktop.org/documentation/plugins.html
--
Russel.
===========================================
Dr Russel Winder t: +44 20 7585 2200
41 Buckmaster Road m: +44 7770 465 077
London SW11 1EN, UK w: www.russel.org.uk
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