On Thu, Jan 12, 2017 at 10:59:56AM -0600, Joel Cunningham wrote: > Nicolas, > > I’ve found existing “read-ahead logic” in avio_seek to do what I’ve > implemented in http_stream_forward(). This is controlled by > SHORT_SEEK_THRESHOLD, currently set to 4KB. I proto-typed increasing this to > the 256KB (matches the initial TCP window in my test setup) and saw the same > number of reduction in HTTP GETs and the number of seeks! Thanks for the > heads up, this should reduce my patch size! > > I could plumb this setting (s->short_seek_threshold) to a URL function that > would get the desired value from HTTP/TCP. Looking at how > ffio_init_context() is implemented, it doesn’t appear to have access to the > URLContext pointer. Any guidance on how I can plumb the protocol layer with > aviobuf without a public API change?
i just quickly read this thread and didnt think deeply about it but remembered this old (somewhat ugly) patchset: 88066 O 0327 0:24 Michael Niederm (1.1K) [FFmpeg-devel] [PATCH 1/2] avformat/aviobuf: Use a 512kb IO buffer for http* instead of 32kb 88067 0327 0:24 Michael Niederm (0.7K) ├─>[FFmpeg-devel] [PATCH 2/2] avformat/aviobuf: increase SHORT_SEEK_THRESHOLD from 4096 to 8192 [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Concerning the gods, I have no means of knowing whether they exist or not or of what sort they may be, because of the obscurity of the subject, and the brevity of human life -- Protagoras
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