[gst-devel] faac does not seem to respect bitrate
Francis Rammeloo
francis.rammeloo at gmail.com
Fri Jan 29 13:06:29 CET 2010
It seems that faac does not always the requested respect bitrates. I
have tested this on my Windows machine (using the WinBuilds) by
converting a 128kbps mp3 to several mp4 files with different bitrates:
gst-launch-0.10 filesrc location=kylie.mp3 ! decodebin2 ! faac
bitrate=16000 ! mp4mux ! filesink location=16.mp4
gst-launch-0.10 filesrc location=kylie.mp3 ! decodebin2 ! faac
bitrate=32000 ! mp4mux ! filesink location=32.mp4
gst-launch-0.10 filesrc location=kylie.mp3 ! decodebin2 ! faac
bitrate=64000 ! mp4mux ! filesink location=64.mp4
gst-launch-0.10 filesrc location=kylie.mp3 ! decodebin2 ! faac
bitrate=128000 ! mp4mux ! filesink location=128.mp4
gst-launch-0.10 filesrc location=kylie.mp3 ! decodebin2 ! faac
bitrate=256000 ! mp4mux ! filesink location=256.mp4
gst-launch-0.10 filesrc location=kylie.mp3 ! decodebin2 ! faac
bitrate=320000 ! mp4mux ! filesink location=320.mp4
The resulting filesizes show the issue:
29/01/2010 12:57 <DIR> .
29/01/2010 12:57 <DIR> ..
29/01/2010 12:55 4.402.912 32.mp4
29/01/2010 11:57 5.071.153 kylie.mp3
29/01/2010 12:58 4.403.427 64.mp4
29/01/2010 12:59 5.164.493 128.mp4
29/01/2010 12:59 8.918.765 256.mp4
29/01/2010 13:00 8.918.881 320.mp4
29/01/2010 13:01 4.402.803 16.mp4
Is there a way to make it respect the requested bitrates?
Grts,
Francis
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