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• How can we feed bytearray of an image in input of ffmpeg for doing direct operation for live streaming to RTMP server

  31 janvier 2017, par Raj Kumar Singh

  What I am doing now is :

  I have a stream from a source, that give me byte array for each frame. I have to save that byte array to JPEG file. Each of the frames are being saved in memory. Then I’am streaming those JPEG to server using the FFMPEG command.

  What I want to do is :

  I want to skip the step of storing each frame as JPEG. I want to directly stream the byte array to RTMP server.

  The FFMPEG command I am using is :-

  ffmpeg -framerate 10 -i c:\Stream\img%03d.jpg -f flv rtmp://192.168.243.195/live/ac71e

• Run avconv in python and direct stdout/stderr to a file

  19 février 2016, par tdk

  I wish to run Avconv commands and record the logs in a file. In the Ubuntu terminal this can be accomplished using &>> operator after the actual command enclosed in parenthesis i.e.

  (avconv -i SRCFILE -ss 00:15:00 -t 00:30:00 TARGETFILE -threads auto) &>> LOGFILE

  The above command works perfectly when run in the terminal.

  Now I have a number of such commands to run, and thought running them through Python would be good.

  1. I tried using the os.system(command_string) way
     , which when run does not pack the Avconv output to the LOGFILE, and the avconv command seems to execute after the Python script is done - evidenced by some string outputs I put in for debugging. I’m also getting some permission errors. Here is how the first portion of output looks like

     AVCONV COMMAND EXECUTED
     
     sh: 1: : Permission denied
     
     sh: 1: : Permission denied
     
     sh: 1: 
     
     
     
     
     
     PROGRAM DONE
     
     : Permission denied
     
     $ avconv version 11.2-6:11.2-1, Copyright (c) 2000-2014 the Libav developers
     
       built on Jan 18 2015 05:12:33 with gcc 4.9.2 (Ubuntu 4.9.2-10ubuntu2)
     
     Trailing options were found on the commandline.
     
     Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ...

  2. I also tried using the subprocess.call() method for which I get the following error (NOTE : all files exist)

     Traceback (most recent call last):
     
       File "/home/usr/cnv.py", line 61, in <module>
     
         main()
     
       File "/home/usr/cnv.py", line 46, in main
     
         subprocess.call(newcmd)
     
       File "/usr/lib/python2.7/subprocess.py", line 522, in call
     
         return Popen(*popenargs, **kwargs).wait()
     
       File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
     
         errread, errwrite)
     
       File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child
     
         raise child_exception
     
     OSError: [Errno 2] No such file or directory
     
     </module>

  I wish to run multiple (think 50+) commands of Avconv similar to the version shown at the top, and have the logs saved in a file instead of in stdout. How do I do this - in Python or otherwise ?

• Automatically change MANGLE() into named inline asm operands when direct symbol refer...

  18 mars 2014, par Matt Oliver

  Automatically change MANGLE() into named inline asm operands when direct symbol reference in inline asm are not supported.
  This is part of the patch-set for intel C inline asm on windows support
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] configure
  • [DH] libavcodec/x86/cabac.h
  • [DH] libavcodec/x86/cavsdsp.c
  • [DH] libavcodec/x86/dsputil_mmx.c
  • [DH] libavcodec/x86/h264_i386.h
  • [DH] libavcodec/x86/idct_sse2_xvid.c
  • [DH] libavcodec/x86/lpc.c
  • [DH] libavcodec/x86/motion_est.c
  • [DH] libavcodec/x86/simple_idct.c
  • [DH] libavcodec/x86/vc1dsp_mmx.c
  • [DH] libavutil/x86/asm.h
  • [DH] libpostproc/postprocess_template.c
  • [DH] libswresample/x86/resample_mmx.h
  • [DH] libswscale/x86/rgb2rgb_template.c
  • [DH] libswscale/x86/swscale_template.c
  • [DH] libswscale/x86/yuv2rgb_template.c