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• OpenCV Limit 6 max connection

  5 novembre 2017, par Rock

  I use opencv with python and flask and ffmpeg to capture video streaming of 8 cameras,

  everything works,

  but it allows me a maximum of 6 opencv connections, how can i fix it ? did anyone find my problem myself ?

  error : leak memory ffmpeg

• avformat/aviobuf : don't reduce short seek threshold

  14 mars 2021, par Andriy Gelman

  avformat/aviobuf : don't reduce short seek threshold
  Commit 8c8e5d5286bf598a89ef9993a2cf6ea409d03a32 added a way to reduce
  
  seek time by waiting for the windowed tcp packets instead of creating a
  
  new socket connection. It implemented this by overwriting
  
  s->short_seek_threshold in avio_seek(). However,
  
  s->short_seek_threshold could already be set and be higher than the
  
  threshold set by the protocol (i.e. s->short_seek_threshold is set in
  
  ff_configure_buffers_for_index()).
  This new feature was only enabled for tls connections in
  
  70d8077b795766e2486e6ec8110f22a97362d6d6. As in Ticket #9148 it reduced
  
  performance because instead of waiting to refill the AVIOContext buffers
  
  with an existing connections, a new HTTP request was often made instead.
  Fixes Ticket #9148.
  Reviewed-by : Martin Storsjö <martin@martin.st>
  
  Signed-off-by : Andriy Gelman <andriy.gelman@gmail.com>
  

  • [DH] libavformat/aviobuf.c

• avformat/hls : add http_multiple option

  13 décembre 2017, par Aman Gupta

  avformat/hls : add http_multiple option
  This improves network throughput of the hls demuxer by avoiding
  
  the latency introduced by downloading segments one at a time.
  The problem is particularly noticable over high-latency network
  
  connections : for instance, if RTT is 250ms, there will a 250ms idle
  
  period between when one segment response is read and the next one
  
  starts.
  The obvious solution to this is to use HTTP pipelining, where a
  
  second request can be sent (on the persistent http/1.1 connection)
  
  before the first response is fully read. Unfortunately the way the
  
  http protocol is implemented in avformat makes implementing pipleining
  
  very complex.
  Instead, this commit simulates pipelining using two separate persistent
  
  http connections. This has the advantage of working independently of
  
  the http_persistent option, and can be used with http/1.0 servers as
  
  well. The pair of connections is swapped every time a new segment starts
  
  downloading, and a request for the next segment is sent on the secondary
  
  connection right away. This means the second response will be ready and
  
  waiting by the time the current response is fully read.
  Signed-off-by : Aman Gupta <aman@tmm1.net>
  
  Signed-off-by : Anssi Hannula <anssi.hannula@iki.fi>
  

  • [DH] doc/demuxers.texi
  • [DH] libavformat/hls.c