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• ffmpeg output parse in batch script

  3 juillet 2016, par vlad2005

  I am totally unfamiliar with scripts in Windows, but are forced to use such a script. I would like someone to help me with the following problem. I want to process the output from ffmpeg command to save information about access an webcam to be used later.
  More precisely command is following :

  ffmpeg -stats -hide_banner -list_devices true -f dshow -i dummy

  and output is like this :

  [dshow @ 02cec400] DirectShow video devices (some may be both video and audio devices)
  
  [dshow @ 02cec400]  "Microsoft LifeCam Studio"
  
  [dshow @ 02cec400]     Alternative name "@device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global"
  
  [dshow @ 02cec400] DirectShow audio devices
  
  [dshow @ 02cec400]  "Desktop Microphone (3- Studio -"
  
  [dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -"
  
  [dshow @ 02cec400]  "Line In (High Definition Audio "
  
  [dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line In (High Definition Audio "
  
  [dshow @ 02cec400]  "Microphone (High Definition Aud"
  
  [dshow @ 02cec400]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (High Definition Aud"

  Typically, the first two occurence for ”Alternative name” from DirectShow correspond to video and audio, so for simplicity I want these two information saved in two variables.
  In this example is :

  @device_pnp_\\?\usb#vid_045e&pid_0772&mi_00#6&2a15e69b&0&0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global

  and

  @device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Desktop Microphone (3- Studio -

  Can someone more experienced to help me with this task ?
  Thanks in advance !

• avcodec/aacsbr_template : Remove pointless runtime initialization

  27 décembre 2020, par Andreas Rheinhardt

  avcodec/aacsbr_template : Remove pointless runtime initialization
  The sbr_qmf_window_us array is basically symmetric around its middle
  
  element and therefore the latter half is currently initialized from the
  
  first half at runtime. Yet because the first half is initialized, the
  
  array can't be placed in .bss at all, so that one gains nothing from not
  
  already initializing the whole array statically. Therefore this commit
  
  does exactly this.
  (There are two exceptions to the symmetry : Elements 384 and 512 are the
  
  negations of their mirror element ; for the fixed-point decoder, Q31(-x)
  
  does not equal -Q31(x). In order to keep the array exactly the same, the
  
  latter form has been used for these two elements.)
  Reviewed-by : Lynne <dev@lynne.ee>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavcodec/aacsbr_template.c
  • [DH] libavcodec/aacsbrdata.h

• Merge three media files (Video and image) into one

  8 avril 2019, par Munshi Arif Rashid

  I have total three separated media files. The first file is 1600X900 .mp4 file which will be placed at the left side of the screen (Height size will be full screen and width will cover two-thirds of the screen). The second file is 640X480 .png file which will be placed at the upper right of the screen (Height size will be half of the screen and width will cover one-third of the screen). The third file is 640X480 .webm file which will be placed at the lower right of the screen (Height size will be half of screen and width will cover one-thirds of the screen). I want to merge these three files in a single screen as mentioned above. Can anyone help me ? Thanks