[FFmpeg-devel] [PATCH] avfilter: add Audio Video Sync Test filter
Paul B Mahol
onemda at gmail.com
Sat Aug 19 17:15:02 EEST 2017
On 8/19/17, Nicolas George <george at nsup.org> wrote:
> Le duodi 2 fructidor, an CCXXV, Paul B Mahol a écrit :
>> Sorry but where is that present? I nowhere can determine exact delay
>> in number of frames versus sine beep.
> In the upper-left corner, you have a microsecond timestamp and a frame
That is not delay between blink and beep. But video timestamps.
>> It is not sine but testsrc2 one that would need modification.
> Care to explain? The beep is produced by sine. Why would you want to
> modify testsrc2?
For lipsync one would need to alter so blinks happens at exact same
time as beeps.
Say delay is 10 frames, you modify filter to produce delayed blinks.
>> Why you do not agree? When is actual beep when beating cross appears?
> The beep is when the cross is fully contracted.
That is far for being user friendly and obvious.
> Nicolas George
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> ffmpeg-devel at ffmpeg.org
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