max_analyze_duration 5000000 reached

[Chris Davies]

On 28/04/2012 18:11, Rob Dixon wrote:
> I've seen the error message
>
>   max_analyze_duration 5000000 reached at 5014000
>   Estimating duration from bitrate, this may be inaccurate

If you a have a fixed bit-rate recording it's pretty trivial to work out 
the duration from the bit-rate and file size. If you have a variable 
bit-rate recording, though, it's not possible to determine the actual 
duration of the programme without running right the way through to the 
end. This takes time, and ffmpeg has a cut-off point (in real seconds)  
to stop it taking too long to work out the programme duration.

In practical terms, this might mean that a one hour programme is 
estimated at 1:05 or maybe only 57 minutes. If it's essential that you 
know precisely how long a programme is going to last then you will 
probably find an ffmpeg parameter to tweak. On the other hand, if you're 
happy that a programme of 1:05 or 0:57 is "probably" actually an hour, 
then just leave it be and don't worry.

In answer to your other question, whether it's possible to tweak the 
ffmpeg settings from within get_iplayer, I haven't looked so can't help you.

Chris