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• How to add an arbitrary, formatted timestamp to a video with FFMPEG ? [duplicate]

  23 avril 2018, par Neil M.

  This question already has an answer here :

  • Can ffmpeg burn in time code ?
    
    7 answers
    

  I am calling ffmpeg from a custom tool to concatenate video files while overlaying a timestamp in the output. The output video needs to have a timestamp starting at an arbitrary time. The format must be a 12-hour clock with seconds and meridiem, e.g. 10:34:59 AM or 6:13:09 PM. Here’s the full command I’m using right now :

  ffmpeg\bin\ffmpeg.exe -y -i "concat:input.mod" -ss 00:00:00 -t 00:02:17 
  
  -an -vcodec libx264 -profile:v baseline -level 13 -b:v 2000k -vf 
  
   "drawtext=fontcolor=white:fontsize=16:fontfile="/Windows/Fonts/arial.ttf":
  
  box=1:boxcolor=black@0.3:x=(w-text_w-10):y=(h-text_h-5):
  
  timecode='02\:36\:17\;00':rate=30000/1001" output.mp4

  This outputs a 2 minute, 17 second duration video beginning at the start of the input file. The output video has a timecode in the bottom-right corner beginning at the time 02:36:17 and ending at 02:38:34. What I want is exactly this, but instead of printing "02:36:17 ;00" on frame 0 and counting up from there, it should print "2:36:17 AM" on frame 0 and count up from there.

  I have tried using the localtime function to output formatted time, but the time value it uses is the time that the drawtext filter is called. It doesn’t take a parameter for an arbitrary time.

  I have also looked at the pts function, which seems to allow an arbitrary offset but only supports two formatting options, neither of which is the clock format I need.

  What is the proper way to add a timestamp with an arbitrary starting time and format using ffmpeg ?

• FFMPEG - Convert UInt16 Data to .264

  22 mai 2018, par Lukas Marschall

  At the moment, I’m trying to convert with FFMPEG my raw data in uint16 format from an infrared camera to MP4 format or at least to .h264.

  My current command for ffmpeg is here :

  ffmpeg -f rawvideo -pix_fmt gray16be -s:v 140x110 -r 30 -i binaryMarianData.bin -c:v libx264 -f rawvideo -pix_fmt yuv420p output.264

  But my ouput File is not really looking good :(

  • Frame of My Input, its a Nose
  • Frame of My Output

  Here is my Input File : http://fileshare.link/91a43a238e0de75b/binaryMarianData.bin

  Update 1 : Little Endian

  Hey guys, would be great if it’s possible to get the video output in the little endian byte order.

  • This is a frame shown with ImageJ with the following settings
  • Settings of the shown frame above in ImageJ

  Unfortunaley my output doesn’t look like this.

  • Output Frame Little Endian

  This is my command used to convert the RAW File :

  ffmpeg -f rawvideo -pixel_format gray16le -video_size 110x140 -framerate 30 -i binaryMarianData.bin -vf transpose=clock -c:v libx264 -pix_fmt yuv420p output.264

• avformat/movenc : creating producer reference time (PRFT) box

  7 mai 2018, par Vishwanath Dixit

  avformat/movenc : creating producer reference time (PRFT) box
  The producer reference time box supplies relative wall-clock times
  
  at which movie fragments, or files containing movie fragments
  
  (such as segments) were produced.
  
  The box is mainly useful in live streaming use cases. A media player
  
  can parse the box and utilize the time fields to measure and improve
  
  the latency during real time playout.
  

  • [DH] doc/muxers.texi
  • [DH] libavformat/movenc.c
  • [DH] libavformat/movenc.h