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• crtmpserver error, appselector can be a final destination

  29 mai 2015, par user2366736

  I’m trying to setup a CRTMP serve by using its script run and its default script crtmpserver.lua. my os is centos6, and kenerl version 2.6.32.

  The server start ok, showes
  /crtmpserver/src/crtmpserver.cpp:267 GO ! GO ! GO !

  But when i use ffmpeg to push a flv stream, using the command
  ffmpeg -re -i test.flv -acodec copy -vcodec copy -f flv rtmp ://localhost:1935/appselector/room1

  it shows the error
  RTMP_ReadPacket, failed to read RTMP packet header
  rtmp ://localhost:1935/appselector/room1 : Operation not permitted

  and the crtmpserver shows the following error

  /applications/appselector/src/rtmpappprotocolhandler.cpp:66 appselector can be a final destination

  /thelib/src/protocols/rtmp/basertmpprotocol.cpp:1049 Unable to send rtmp message
  to application

  /thelib/src/netio/epoll/tcpcarrier.cpp:89 Unable to signal data available

  /thelib/src/netio/epoll/iohandlermanager.cpp:130 Handlers count changed : 11->10 IOHT_TCP_CARRIER

  /thelib/src/protocols/protocolmanager.cpp:45 Enqueue for delete for protocol [IR(3)]

  /thelib/src/application/baseclientapplication.cpp:246 Protocol [IR(3)] unregistered from application : appselector

  Does the default lua config has some wrong ?

• lavu/tx : refactor assembly codelet definition

  7 février 2022, par Lynne

  lavu/tx : refactor assembly codelet definition
  This commit does some refactoring to make defining assembly codelets
  
  smaller, and fixes compiler redefinition warnings. It also allows
  
  for other assembly versions to reuse the same boilerplate code as
  
  x86.
  Finally, it also adds the out_of_place flag to all assembly codelets.
  
  This changes nothing, as out-of-place operation was assumed to be
  
  available anyway, but this makes it more explicit.
  

  • [DH] libavutil/tx_priv.h
  • [DH] libavutil/x86/tx_float_init.c

• Fallback input for ffmpeg

  22 septembre 2018, par Daniel Cantarin

  I’m doing some transcoding from a third-party remote input stream that I do not control.

  This input stream has errors from time to time, that I would like to mitigate before sending the stream to my transcoding pipeline, avoiding this way some possible problems in the output.

  I have several ideas regarding different problems. But the most basic scenario I would like to set up is as follows : when the stream is down, or it somehow loses some frames, I want to fill that video gap with a secondary input (like a blank screen, for example).

  For this simple task, I would like to use ffmpeg. I know it can mix, let’s say, an input stream with a fullscreen black square static image. However, I have to deal with this other condition : ffmpeg would run in the same infraestructure for the actual transcoding pipeline. That infraestructure must use its computing power for rendering the output. So, whatever ffmpeg command I end up using should use the minimum possible computing power.

  My actual problem : if I use -vcodec copy, in order to use minimum CPU, I can’t alter the original stream. But if I alter the original stream (by mixing it with some other stream), the operation uses CPU.

  My question : Is there a way to use -vcodec copy, but with a fallback input (instead of a mixed one) for when there are video gaps in the primary stream ?

  Thanks in advance.