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• avcodec/pngdec : Copy IHDR & plte state from last thread

  29 juin 2015, par Michael Niedermayer

  avcodec/pngdec : Copy IHDR & plte state from last thread
  Previously these chunks where parsed again for each frame with threads
  
  but not without leading to a different path and the potential for
  
  inconsistencies
  This also removes a related special case from decode_ihdr_chunk()
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/pngdec.c

• Zoom and Moving based on audio information in FFMPEG

  19 décembre 2019, par Mattstir

  I recently wondered if it is possible to zoom or move things in FFMPEG based on an audio source.

  I already played around with complex filters as they allow some audio visualization but didn’t really manage to move/zoom things based on sound. See good examples of complex filters used for audio visualization at : https://hhsprings.bitbucket.io/docs/programming/examples/ffmpeg/audio_visualization/index.html

  My current situation is that i have multiple inputs which one of should react on sound/maybe even on special frequency’s.

• avformat/matroskaenc : Don't write \0 unnecessarily

  8 août 2023, par Andreas Rheinhardt

  avformat/matroskaenc : Don't write \0 unnecessarily
  Writing the duration SimpleTag is special : It's size is
  
  reserved in advance via an EBML Void element (if seekable)
  
  and this reserved space is overwritten when writing the trailer ;
  
  it does not use put_ebml_string().
  The string to write is created via snprintf on a buffer
  
  of size 20 ; this buffer is then written via put_ebml_binary()
  
  with a size of 20.
  EBML strings need not be zero-terminated ; if not, they
  
  are implicitly terminated by the element's length field.
  
  snprintf() always zero-terminates the buffer, i.e.
  
  the last byte can be discarded when using an EBML string.
  
  This patch does this.
  The FATE changes are as expected : One byte saved for every
  
  track ; the only exception is the matroska-qt-mode test :
  
  An additional byte is saved because an additional byte
  
  could be saved from the enclosing Tags length field.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavformat/matroskaenc.c
  • [DH] tests/ref/fate/aac-autobsf-adtstoasc
  • [DH] tests/ref/fate/matroska-alac-remux
  • [DH] tests/ref/fate/matroska-avoid-negative-ts
  • [DH] tests/ref/fate/matroska-dovi-write-config7
  • [DH] tests/ref/fate/matroska-dovi-write-config8
  • [DH] tests/ref/fate/matroska-dvbsub-remux
  • [DH] tests/ref/fate/matroska-encoding-delay
  • [DH] tests/ref/fate/matroska-flac-extradata-update
  • [DH] tests/ref/fate/matroska-h264-remux
  • [DH] tests/ref/fate/matroska-hdr10-plus-remux
  • [DH] tests/ref/fate/matroska-mastering-display-metadata
  • [DH] tests/ref/fate/matroska-move-cues-to-front
  • [DH] tests/ref/fate/matroska-mpegts-remux
  • [DH] tests/ref/fate/matroska-ms-mode
  • [DH] tests/ref/fate/matroska-ogg-opus-remux
  • [DH] tests/ref/fate/matroska-opus-remux
  • [DH] tests/ref/fate/matroska-pgs-remux
  • [DH] tests/ref/fate/matroska-pgs-remux-durations
  • [DH] tests/ref/fate/matroska-qt-mode
  • [DH] tests/ref/fate/matroska-spherical-mono-remux
  • [DH] tests/ref/fate/matroska-vp8-alpha-remux
  • [DH] tests/ref/fate/matroska-zero-length-block
  • [DH] tests/ref/fate/rgb24-mkv
  • [DH] tests/ref/fate/shortest-sub
  • [DH] tests/ref/fate/webm-av1-extradata-update
  • [DH] tests/ref/fate/webm-dash-chapters
  • [DH] tests/ref/fate/webm-hdr10-plus-remux
  • [DH] tests/ref/fate/webm-webvtt-remux
  • [DH] tests/ref/lavf-fate/av1.mkv
  • [DH] tests/ref/lavf/mka
  • [DH] tests/ref/lavf/mkv
  • [DH] tests/ref/lavf/mkv_attachment
  • [DH] tests/ref/seek/lavf-mkv