Hi all!
I'm using ffmpeg SVN revision r21634 for my project. The task is to play
back internet radio streams, mainly MP3 stations. The application dumps
the downloaded stream into a file, as it is read with av_read_frame(...).
Everything works well, but I've observed something. After opening the
stream and reading the initial frames from the broadcasted program, the
first one or two frames seem to be corrupt. I mean, the MPEG audio
header sync bits can not be found, that's why both mpg123 and mplayer
consider that frame to be broken and simply skip it. In other cases the
MPEG sync bits are ok, but after decoding the frame some noise can be heard.
The question is: why does ffmpeg send some garbage at the beginning?
Later on there are no problems at all. I've tried to perform some cache
flushing with av_read_frame_flush(...) and avcodec_flush_buffers(...),
but either crashed or it's internal function and can not be called from
a user application.
What shall I do in order to get rid of those broken frames? (now I
perform filtering on MPEG audio sync bits, although this test must be
extended according to my experiences)
Thanks,
--
Selmeci, Tamas
http://www.open-st.eu
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