Sorry for garbled, reissued as follows.
In the avfiltergraph of FFmpeg, it is required that all filters within the
graph can obtain a format and successfully negotiate for data flow.
So, is it allowed for the graph to contain filters that cannot obtain a format?
Can these filters be ignored during format negotiation, allowing only the
filters that can obtain a format to negotiate successfully?
This patch addresses the problem described in this scenario.
For example:
(abuff_src@Music)(abuff_src@Ring)---amix---abuff_sink
In the graph above, We support three playback scenarios at the same time:
1. Only abuff_src@Music needs to be played, and abuff_src@Ring has no data.
abuff_src@Ring is ignored during negotiation, "abuff_src@Music -- amix --
abuff_sink" link negotiation is successful, and playback can be performed;
2. Only abuff_src@Ring needs to be played, and abuff_src@Music has no data.
abuff_src@Music is ignored during negotiation, "abuff_src@ring --> amix
--> abuff_sink" link negotiation is successful, and playback can be
performed;
3. Both abuff_src@Music and abuff_src@Ring need to be played, and all filters
are negotiated successfully and mixed playback is performed.
??????
269032...@qq.com
------------------ ???????? ------------------
??????:
"FFmpeg development discussions
and patches"
<rsbul...@gmail.com>;
????????: 2025??3??26??(??????) ????2:05
??????: "FFmpeg development discussions and
patches"<ffmpeg-devel@ffmpeg.org>;
????: Re: [FFmpeg-devel] [PATCH] avfilter: Proof of Concept: enable
out-of-tree filters
Hi,
On Mon, Mar 24, 2025 at 12:20?6?2PM Leandro Santiago
<leandrosansi...@gmail.com>
wrote:
> I really hope this can be the last iteration, as I ran out of ideas on how
> to simplify the process, so please let me know your thoughts :-)
I'm not sure I understand the rationale or goal of this. It seems you're
trying to create a process for extending the source/build tree with
components not part of our git. Is this something people are interested in?
I've never heard this use case before.
Ronald
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