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commit 9a13d22118ba30b4543587a74cefa8276715e424 Author: Niklas Haas <[email protected]> AuthorDate: Mon Aug 31 18:19:37 2026 +0200 Commit: Niklas Haas <[email protected]> CommitDate: Mon Sep 21 14:23:20 2026 +0000 fftools/ffmpeg_sched: drop packet thread queue size The previous series of commits makes this limit apply per-stream, instead of per-packet, so there's no real reason to have it set to such a high limit anymore. Buffering 8 packets is really the same as buffering 8 frames, if the decoders are faster than the encoder (usually the case) and immediately drain it into a shared filter graph while that filter graph is stuck waiting for a different input (from the same demuxer). I also doubt the methodology of e0da916b8 still holds up; a lot of moving parts have changed since then. I was not able to reproduce any speed difference at all acress any number of packets buffered; even reducing this to 1 gave me no measurable downside. The only scenario where I can measure a difference is if the fifo size is smaller than the number of streams, but that is now impossible. I'm tempted to just lower this all the way to 1, but I kept 2 for the time being as a hedge against any pathological edge cases. In the worst case, users can still use -thread_queue_size to increase this limit for testing / performance tuning. Sponsored-by: nxtedition AB Signed-off-by: Niklas Haas <[email protected]> --- fftools/ffmpeg_sched.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fftools/ffmpeg_sched.h b/fftools/ffmpeg_sched.h index 2cf3034437..952e56e7b5 100644 --- a/fftools/ffmpeg_sched.h +++ b/fftools/ffmpeg_sched.h @@ -254,7 +254,7 @@ int sch_add_mux(Scheduler *sch, SchThreadFunc func, int (*init)(void *), * Default size of a packet thread queue. For muxing this can be overridden by * the thread_queue_size option as passed to a call to sch_add_mux(). */ -#define DEFAULT_PACKET_THREAD_QUEUE_SIZE 8 +#define DEFAULT_PACKET_THREAD_QUEUE_SIZE 2 /** * Default size of a frame thread queue. -- To stop receiving notification emails like this one, please contact [email protected]. _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
