Hello there, If we have a filtergraph that is already configured and running, what is the best way to change its source?
The details... 1. In our product, we use a filtergraph that consists of two filterchains in series: front_filterchain -> back_filterchain 2. Initially, front_filterchain starts with an `anullsrc` and some filters. The back_filterchain is always a fixed number of filters ending with a `abuffersink`. 3. The filtergraph is configured and running, and we get 0 samples from buffersink as expected. 4. We then replace front_filterchain with another front_filterchain which starts with an `abuffer` and some filters. The back_filterchain stays the same. 5. After calling `avfilter_graph_config()` we use `avfilter_config_links()` to configure the new links in front_filterchain. 6. We can then push new frames into the `abuffer` and get processed frames out of the `abuffersink`. 7. This works really well in in our product, which helps hundreds of thousands of users exporting their video timeline. We can also mix many front_filterchain chains into one back_filterchain and dynamically replace them. front_filterchain1 \ front_filterchain2 -> back_filterchain front_filterchain3 / 8. But, `avfilter_config_links()` was deprecated and removed over the course of around last 2 years. I wrote a bit more here: https://lists.ffmpeg.org/archives/list/[email protected]/message/W5LFRAPKMQHEW5RVM2GTAEDNTONUQS7I/ So, what is the best way to go about this. I.e. Hod do we replace source filterchains on the fly? I'm happy to write more about it, if needed. I'm just not sure if this is a unique use-case. It feels like a streaming use case that FFmpeg's filtergraphs should easily support. Thanks, Nolan _______________________________________________ Libav-user mailing list -- [email protected] To unsubscribe send an email to [email protected]
