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• Display formatted date and time over frames using ffmpeg

  28 août 2020, par marcman

  I've gone through a handful of questions on here (this, this, this, etc) concerning overlaying the date and time on videos using ffmpeg, but I haven't been able to figure out the solution.

  


  I personally have found the ffmpeg documentation difficult to parse as well regarding drawing text that updates every (N) frame(s).

  


  I have the exif data from a movie specifying when it was created. I'd like to be able to emblazen that over the movie (as though it were a home video from some old VHS tape). For example, let's say I have a video from January 2, 2012 at 10:33:53. I'd like to be able to show "Jan 2, 2012 10:33:53am" on the lower right in white text. The spatial positioning and color are clear to me, but just how to go from the timestamp information I have to the formatted expansion is proving to be quite difficult for me. I have succeeded in getting a clock starting from 00:00:00.00 and counting up (using timecode and timecode_rate), but unfortunately I can't get much more than that.

  


  My question is : what is the proper datetext command that will allow me to both (a) provide the start time, and (b) format it with the proper expansion.

  


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  As a bonus, if you can also point me to how to do this using the wonderful ffmpeg-python library, it would be even better. That library is quite good, but it does not appear to be actively maintained anymore.

  


• avcodec/exr : add support data windows larger or outside display window

  7 septembre 2020, par Mark Reid

  avcodec/exr : add support data windows larger or outside display window
  

  • [DH] libavcodec/exr.c
  • [DH] tests/fate/image.mak
  • [DH] tests/ref/fate/exr-rgb-scanline-float-zip-dw-large
  • [DH] tests/ref/fate/exr-rgb-scanline-half-piz-dw-large
  • [DH] tests/ref/fate/exr-rgb-scanline-half-zip-dw-large
  • [DH] tests/ref/fate/exr-rgb-scanline-half-zip-dw-outside
  • [DH] tests/ref/fate/exr-rgb-scanline-uint32-piz-dw-large
  • [DH] tests/ref/fate/exr-rgb-tile-half-piz-dw-large
  • [DH] tests/ref/fate/exr-rgb-tile-half-zip
  • [DH] tests/ref/fate/exr-rgb-tile-half-zip-dw-outside
  • [DH] tests/ref/fate/exr-rgb-tile-uint32-piz-dw-large
  • [DH] tests/ref/fate/exr-ya-scanline-zip-half-12x8

• avformat/mxfdec : Read Mastering Display Colour Volume from MXF

  9 septembre 2020, par Harry Mallon

  avformat/mxfdec : Read Mastering Display Colour Volume from MXF
  Described in Annex B SMPTE ST 2067-21:2020
  Signed-off-by : Harry Mallon <harry.mallon@codex.online>
  

  • [DH] libavformat/mxf.c
  • [DH] libavformat/mxf.h
  • [DH] libavformat/mxfdec.c
  • [DH] libavformat/mxfenc.c