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fftools/ffmpeg_sched: allow filtergraphs to send to filtergraphs

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Will be useful for filtergraph chaining that will be added in following
commits.
This commit is contained in:
Anton Khirnov
2024-04-05 11:42:10 +02:00
parent 3d01996b24
commit 255ae03601
2 changed files with 63 additions and 37 deletions
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6
fftools/ffmpeg_sched.h
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@@ -41,7 +41,8 @@
* - filtergraphs, each containing zero or more inputs (0 in case the
* filtergraph contains a lavfi source filter), and one or more outputs; the
* inputs and outputs need not have matching media types;
* each filtergraph input receives decoded frames from some decoder;
* each filtergraph input receives decoded frames from some decoder or another
* filtergraph output;
* filtered frames from each output are sent to some encoder;
* - encoders, which receive decoded frames from some decoder (subtitles) or
* some filtergraph output (audio/video), encode them, and send encoded
@@ -51,6 +52,9 @@
* encoder (transcoding); those packets are interleaved and written out by the
* muxer.
*
* The structure formed by the above components is a directed acyclic graph
* (absence of cycles is checked at startup).
*
* There must be at least one muxer instance, otherwise the transcode produces
* no output and is meaningless. Otherwise, in a generic transcoding scenario
* there may be arbitrary number of instances of any of the above components,