[mythtv] tracking the cause of channel change slowness

Steven Adeff adeffs.mythtv at gmail.com
Sun Feb 19 15:17:33 UTC 2006

On 2/19/06, Pekka Jääskeläinen <pekka.jaaskelainen at gmail.com> wrote:
> Hi,
> I've been tracking the cause of the channel change slowness in my system (takes
> around 8-12 secs). For now, I've managed to find two slow function
> calls during the
> channel change, both at AvFormatDecoder::OpenFile().
> The calls to av_find_stream_info() and to ScanStreams() together take
> around 3-4
> secs of the channel change time.
> Any ideas why this is the case? I have a reasonably fast computer (P4
> 2.6GHz) and
> those functions don't seem to be overly complicated. Any ideas how to
> optimize the
> calls in case of DVB LiveTV?
> Thanks in advance,

perhaps they are waiting for input data from your DVB card?


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