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authorAnton Khirnov <anton@khirnov.net>2023-07-06 21:31:49 +0200
committerAnton Khirnov <anton@khirnov.net>2023-07-15 11:02:11 +0200
commit0a6751a78ab8a894eceaade6bf7578af6c0cd38b (patch)
tree222a664705ff6a61c5d94d0c8fdf2bed4a2c8e00 /doc/ffmpeg.txt
parent20c42213eaf0a9cfd446f5c3ab5afcfe9ec01f26 (diff)
downloadffmpeg-0a6751a78ab8a894eceaade6bf7578af6c0cd38b.tar.gz
fftools/ffmpeg: rework initializing encoders with no frames
When no frames were passed from a filtergraph to an encoder, but the filtergraph is configured (i.e. has output parameters), encoder flush code will use those parameters to initialize the encoder in a last-ditch effort to produce some useful output. Rework this process so that it is triggered by the filtergraph, which now sends a dummy frame with parameters, but no data, to the encoder, rather than the encoder reaching backwards into the filter. This approach is more in line with the natural data flow from filters to encoders and will allow to reduce encoder-filter interactions in following commits. This code is tested by fate-adpcm-ima-cunning-trunc-t2-track1, which (as confirmed by Zane) is supposed to produce empty output.
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