On Mon, 1 Oct 2018, Paul B Mahol wrote:

On 10/1/18, Marton Balint <c...@passwd.hu> wrote:


On Mon, 1 Oct 2018, Paul B Mahol wrote:

On 10/1/18, Marton Balint <c...@passwd.hu> wrote:


On Mon, 1 Oct 2018, Paul B Mahol wrote:

On 10/1/18, Marton Balint <c...@passwd.hu> wrote:


On Mon, 1 Oct 2018, Paul B Mahol wrote:

On 9/30/18, Marton Balint <c...@passwd.hu> wrote:
Signed-off-by: Marton Balint <c...@passwd.hu>
---
 libavfilter/af_afade.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)


Why?

Value is too big.

AV_OPT_TYPE_DURATION is microsecond precision, therefore 60 is 60
usecs.
Probably you meant 60 seconds as limit. That is what the patch fixes.

I do not think so. Duration is interpreted as seconds, look how
variable is used in code.

As far as I see duration is rescaled from AV_TIME_BASE (microseconds) to
sample_rate time base:

if (s->duration)
      s->nb_samples = av_rescale(s->duration, outlink->sample_rate,
AV_TIME_BASE);

Duration is parsed as seconds (can be fractional as well), but internally
it is stored as microseconds (int64). Another example is the f_realtime
filter where the sleep time limit default according to the documentation
is 2 seconds and it is expressed as 2000000 in the code.

Yes, and current patch is wrong. Simply exceding max value is not proper
fix.

What is the proper fix then?

Interpreting duration correctly, like trim filters do.

Somebody help me, because I truly don't get it.

1) OPT_TYPE_DURATION default value is given in the .i64 field in microseconds.

2) OPT_TYPE_DURATION min/max value is given in the min/max fields in microseconds.

Do you disagree with any of these? If yes, then what do you suggest?

Thanks,
Marton
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