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• fftools : provide media type info for devices

  21 décembre 2021, par Diederick Niehorster

  fftools : provide media type info for devices
  fftools now print info about what media type(s), if any, are provided by
  
  sink and source avdevices.
  Signed-off-by : Diederick Niehorster <dcnieho@gmail.com>
  
  Reviewed-by : Roger Pack <rogerdpack2@gmail.com>
  

  • [DH] fftools/cmdutils.c

• avdevice/dshow : select format with extended color info

  21 décembre 2021, par Diederick Niehorster

  avdevice/dshow : select format with extended color info
  Some DirectShow devices (Logitech C920 webcam) expose each DirectShow
  
  format they support twice, once without and once with extended color
  
  information. During format selection, both match, this patch ensures
  
  that the format with extended color information is selected if it is
  
  available, else it falls back to a matching format without such
  
  information. This also necessitated a new code path taken for default
  
  formats of a device (when user didn't request any specific video size,
  
  etc), because the default format may be one without extended color
  
  information when a twin with extended color information is also
  
  available. Getting the extended color information when available is
  
  important as it allows setting the color space, range, primaries,
  
  transfer characteristics and chroma location of the stream provided by
  
  dshow, enabling users to get more correct color automatically out of
  
  their device.
  Closes : #9271
  Signed-off-by : Diederick Niehorster <dcnieho@gmail.com>
  
  Reviewed-by : Roger Pack <rogerdpack2@gmail.com>
  

  • [DH] libavdevice/dshow.c

• How to remove timestamp info from Mp4 file ?

  21 septembre 2022, par dinesh47

  I am looking to remove Timestamp info from mp4 file container.
Is it possible to remove such metadata from a mp4 file
if we can can we do it by FFmpeg lib ?

  


  Here is an example track dump :

  


  


  mp4file OutPut.mp4, track 1, samples 610, timescale 14848

  


  


  


  sampleId 1, size 112773 duration 512 time 0 00:00:00.000 S
sampleId 2, size 131890 duration 512 time 512 00:00:00.034
  
sampleId 3, size 114949 duration 512 time 1024 00:00:00.068
  
sampleId 4, size 111121 duration 512 time 1536 00:00:00.103
  
sampleId 5, size 110190 duration 512 time 2048 00:00:00.137
  
sampleId 6, size 110584 duration 512 time 2560 00:00:00.172
  
sampleId 7, size 111044 duration 512 time 3072 00:00:00.206
  
sampleId 8, size 110104 duration 512 time 3584 00:00:00.241
  
sampleId 9, size 107679 duration 512 time 4096 00:00:00.275
  
sampleId 10, size 107347 duration 512 time 4608 00:00:00.310
  
sampleId 11, size 106728 duration 512 time 5120 00:00:00.344
  
sampleId 12, size 107705 duration 512 time 5632 00:00:00.379
  
sampleId 13, size 176560 duration 512 time 6144 00:00:00.413 S
sampleId 14, size 110496 duration 512 time 6656 00:00:00.448
  
sampleId 15, size 109697 duration 512 time 7168 00:00:00.482

  


  


  Is it possible to hide the duration info in this track dump ?