[FFmpeg-devel] [PATCH] avfilter: add Audio Video Sync Test filter

[Paul B Mahol]

On 8/19/17, Nicolas George <george at nsup.org> wrote:
> Le duodi 2 fructidor, an CCXXV, Paul B Mahol a écrit :
>> How do you know when beep and blink should happen in your example?
>>
>> What is blink for testsrc2? Where in testsrc2 you can see delay in numeric
>> form?
>
> Have you tried? You have a numeric timestamp and frame counter in the
> upper left corner and a beating cross, both in sync with the beeps.
> Please tell me what you are missing here. With more than two lines
> please.

Exact delay in number of frames and that converted to milliseconds.
Also one can not set custom delay between beep and blink.
Also beating cross is far from being easily noticed like blink.