Problems with AAC and qtdemux
bisht.sudarshan at gmail.com
Mon Mar 19 11:59:42 PDT 2012
You can also build ADTS header and attach it with every frame, following
link gives information about ADTS header;
On Mon, Mar 19, 2012 at 9:01 PM, Neil Jones <neiljay at gmail.com> wrote:
> Im trying to play MP4 files with my AAC Decoder but im having problems.
> the file im playing is 'cooper.mp4' from these samples
> this is a 48Khz LC-AAC with SBR (ie HE-AAC), looking a this with
> qtdemux and fakesink gives:
> gst-launch -vvv filesrc location=cooper.mp4 ! qtdemux ! fakesink | more
> caps = audio/mpeg, mpegversion=(int)4, framed=(boolean)true,
> stream-format=(string)raw, codec_data=(buffer)139056e5a0,
> rate=(int)44100, channels=(int)2
> So as qtdemux gives us raw data (not adts or adif framed) I need to
> setup my decoder on the info provided by qtdemux, unfortunatley it
> gives me the wrong sample rate 44.1 instead of 48 and I need to know
> that the profile has SBR as this effects my decoder setup.
> How do other AAC decoders deal with this? Do they just parse the raw
> data, I cant easily do this as my plugin is for a hardware decoder.
> Any help appreciated,
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
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