[FFmpeg-user] Filter documentation -- PTSs

Mark Filipak (ffmpeg) markfilipak at bog.us
Mon Feb 15 02:43:07 EET 2021


On 02/14/2021 07:34 PM, Paul B Mahol wrote:
> On Mon, Feb 15, 2021 at 12:50 AM Mark Filipak (ffmpeg) <markfilipak at bog.us>
> wrote:
> 
>> Disclosure: Everything that follows may be wrong.
>>
>> I reckon that, except for a few filters, the important metric is PTS, not
>> the frame #s assigned at a
>> filter's input node nor its wall-clock arrival time at a filter's input
>> node. For example,
>> 'interleave' performs frame interleaves based on the PTSs of incoming
>> frames -- at least, that's
>> what I think.
>>
>> Am I correct?
>>
>> If so, wouldn't it be helpful if filter documentation included how it
>> generates PTSs?
>>
> 
> PTS are not generated.

ffmpeg -i SOURCE -vf telecine TARGET

What are the PTSs of the first 5 frames at the output of the filter?

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