[FFmpeg-devel] ffmpeg Filtergraph Output

[Bodecs Bela]

2020.05.24. 4:55 keltezéssel, Dennis Mungai írta:
> On Sun, 24 May 2020 at 05:44, Soft Works <softworkz at hotmail.com> wrote:
>
>> Hello,
>>
>> I've seen the commit about the option for dumping the filtergraph and that
>> reminded me about something that I'd be willing to contribute in case
>> anybody likes it.
>>
>> A while ago I was looking for a way to get information about the
>> filtergraphs that ffmpeg builds at runtime, the individual formats that
>> have been negotiated between input and output pins and which filters have a
>> hardware context.
>>
>> I had expected that this is what the graph2dot is intended to do, but that
>> wasn't the case. Turning a filter string into a graph is not what I was
>> looking for.
>>
>> Eventually I have implemented a feature that iterates all filters, their
>> connections and the negotiated media formats during runtime and writes them
>> out as json or xml (using the same methods that ffprobe uses).
>>
>> I have attached an example output and an image as an example for what
>> could be done with the output.
>>
>> Let me know whether there's some interest in this.
>>
>> Regards
>> Softworkz
>>
>> Direct links to the attachments:
>> https://gist.github.com/softworkz/4f4bf2c1365d2ce3f6ac70b1b434aa40
>> https://github.com/softworkz/ffmpegfiltergraphs/issues/1
>>
>>
>>
> This is very fascinating, thanks for working on this.
+1 vote
> Such output would allow for troubleshooting filter performance, especially
> in complex filter setups where hardware contexts are in use.
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