[FFmpeg-devel] [PATCH] avfilter/vf_overlay: add show property/command

Bodecs Bela bodecsb at vivanet.hu
Mon Mar 12 00:09:24 EET 2018

2018.03.11. 23:04 keltezéssel, Nicolas George írta:
> Bodecs Bela (2018-03-11):
>> I frequently use overlay video filter. Sometimes it is needed to dinamically
>> hide/show the ovelaid video. (e.g during live streaming).
>> Currently the only possibility to hide the overlaid video is to position it
>> to off site area of the visible region.
>> This patch creates a new, explicit property to controll hiding/showing the
>> overlaid video.
>> 'show' property may be an expression, similary to x and y.
>> The new 'show' property is controlable by command, also. So its value can be
>> adjusted dinamically during live sessions by zmq filters.
>> To be compatible with existing stuff, its default value is "1".
>> Please review this patch and consider putting this patch into the official
>> ffmpeg source tree.
> Looks like a duplicate of the timeline editing feature, already
> supported by overlay.
sorry I was not aware of it. Where can I read about it?

> Regards,
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best regards,


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