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• ffmpeg - Extract Video filesize from virtual data

  18 décembre 2015, par Youssef El Gharbaoui

  I am trying to calculate a video filesize from its data using FFMPEG.

  Assuming that I have the following data in my disposal :

  • vcodec => mp4a.40.2
  • acodec => avc1.64001F
  • format_note => hd720
  • height => 720
  • width => 1280
  • ext => mp4
  • duration => 56 (seconds)

  Questions :

  1. Is there any mathematical formula that can extract the video
     filesize using the data above
  2. Is it possible to simulate and extract the filesize of a
     non-existing file using the data above
  3. If FFMPEG cannot accomplish what Im asking, what do you suggest ?

  Please let me know if you need any additional information.

  Thanks for your help.

• lavfi/internal : move functions used by filters to filters.h

  12 août 2024, par Anton Khirnov

  lavfi/internal : move functions used by filters to filters.h
  internal.h currently mixes interfaces intended to be used by filters
  
  with those that should be limited to generic filter- or graph-level
  
  code.
  

  • [DH] libavfilter/af_acontrast.c
  • [DH] libavfilter/af_acopy.c
  • [DH] libavfilter/af_acrusher.c
  • [DH] libavfilter/af_adecorrelate.c
  • [DH] libavfilter/af_adenorm.c
  • [DH] libavfilter/af_aderivative.c
  • [DH] libavfilter/af_adynamicequalizer.c
  • [DH] libavfilter/af_adynamicsmooth.c
  • [DH] libavfilter/af_aemphasis.c
  • [DH] libavfilter/af_aexciter.c
  • [DH] libavfilter/af_aformat.c
  • [DH] libavfilter/af_afreqshift.c
  • [DH] libavfilter/af_alimiter.c
  • [DH] libavfilter/af_anequalizer.c
  • [DH] libavfilter/af_anull.c
  • [DH] libavfilter/af_aphaser.c
  • [DH] libavfilter/af_apulsator.c
  • [DH] libavfilter/af_asetrate.c
  • [DH] libavfilter/af_asoftclip.c
  • [DH] libavfilter/af_asr.c
  • [DH] libavfilter/af_astats.c
  • [DH] libavfilter/af_asubboost.c
  • [DH] libavfilter/af_asupercut.c
  • [DH] libavfilter/af_atempo.c
  • [DH] libavfilter/af_atilt.c
  • [DH] libavfilter/af_bs2b.c
  • [DH] libavfilter/af_channelmap.c
  • [DH] libavfilter/af_chorus.c
  • [DH] libavfilter/af_compand.c
  • [DH] libavfilter/af_compensationdelay.c
  • [DH] libavfilter/af_crystalizer.c
  • [DH] libavfilter/af_dcshift.c
  • [DH] libavfilter/af_deesser.c
  • [DH] libavfilter/af_drmeter.c
  • [DH] libavfilter/af_earwax.c
  • [DH] libavfilter/af_extrastereo.c
  • [DH] libavfilter/af_flanger.c
  • [DH] libavfilter/af_haas.c
  • [DH] libavfilter/af_hdcd.c
  • [DH] libavfilter/af_ladspa.c
  • [DH] libavfilter/af_mcompand.c
  • [DH] libavfilter/af_pan.c
  • [DH] libavfilter/af_silencedetect.c
  • [DH] libavfilter/af_stereotools.c
  • [DH] libavfilter/af_stereowiden.c
  • [DH] libavfilter/af_tremolo.c
  • [DH] libavfilter/af_vibrato.c
  • [DH] libavfilter/af_volumedetect.c
  • [DH] libavfilter/asink_anullsink.c
  • [DH] libavfilter/audio.c
  • [DH] libavfilter/audio.h
  • [DH] libavfilter/avfiltergraph.c
  • [DH] libavfilter/dnn/dnn_interface.c
  • [DH] libavfilter/f_bench.c
  • [DH] libavfilter/f_realtime.c
  • [DH] libavfilter/f_reverse.c
  • [DH] libavfilter/f_sidedata.c
  • [DH] libavfilter/filters.h
  • [DH] libavfilter/formats.c
  • [DH] libavfilter/graphdump.c
  • [DH] libavfilter/graphparser.c
  • [DH] libavfilter/internal.h
  • [DH] libavfilter/vf_addroi.c
  • [DH] libavfilter/vf_amplify.c
  • [DH] libavfilter/vf_aspect.c
  • [DH] libavfilter/vf_atadenoise.c
  • [DH] libavfilter/vf_avgblur.c
  • [DH] libavfilter/vf_avgblur_opencl.c
  • [DH] libavfilter/vf_avgblur_vulkan.c
  • [DH] libavfilter/vf_backgroundkey.c
  • [DH] libavfilter/vf_bilateral.c
  • [DH] libavfilter/vf_bitplanenoise.c
  • [DH] libavfilter/vf_blackframe.c
  • [DH] libavfilter/vf_boxblur.c
  • [DH] libavfilter/vf_bwdif.c
  • [DH] libavfilter/vf_cas.c
  • [DH] libavfilter/vf_chromaber_vulkan.c
  • [DH] libavfilter/vf_chromakey.c
  • [DH] libavfilter/vf_chromanr.c
  • [DH] libavfilter/vf_chromashift.c
  • [DH] libavfilter/vf_ciescope.c
  • [DH] libavfilter/vf_codecview.c
  • [DH] libavfilter/vf_colorbalance.c
  • [DH] libavfilter/vf_colorchannelmixer.c
  • [DH] libavfilter/vf_colorconstancy.c
  • [DH] libavfilter/vf_colorcontrast.c
  • [DH] libavfilter/vf_colorcorrect.c
  • [DH] libavfilter/vf_colorize.c
  • [DH] libavfilter/vf_colorkey.c
  • [DH] libavfilter/vf_colorkey_opencl.c
  • [DH] libavfilter/vf_colorlevels.c
  • [DH] libavfilter/vf_colormatrix.c
  • [DH] libavfilter/vf_colorspace.c
  • [DH] libavfilter/vf_colortemperature.c
  • [DH] libavfilter/vf_convolution.c
  • [DH] libavfilter/vf_convolution_opencl.c
  • [DH] libavfilter/vf_copy.c
  • [DH] libavfilter/vf_cropdetect.c
  • [DH] libavfilter/vf_curves.c
  • [DH] libavfilter/vf_dblur.c
  • [DH] libavfilter/vf_dctdnoiz.c
  • [DH] libavfilter/vf_deband.c
  • [DH] libavfilter/vf_deblock.c
  • [DH] libavfilter/vf_deflicker.c
  • [DH] libavfilter/vf_derain.c
  • [DH] libavfilter/vf_deshake.c
  • [DH] libavfilter/vf_despill.c
  • [DH] libavfilter/vf_drawbox.c
  • [DH] libavfilter/vf_drawbox_vaapi.c
  • [DH] libavfilter/vf_edgedetect.c
  • [DH] libavfilter/vf_elbg.c
  • [DH] libavfilter/vf_entropy.c
  • [DH] libavfilter/vf_epx.c
  • [DH] libavfilter/vf_exposure.c
  • [DH] libavfilter/vf_fftdnoiz.c
  • [DH] libavfilter/vf_field.c
  • [DH] libavfilter/vf_fieldorder.c
  • [DH] libavfilter/vf_fillborders.c
  • [DH] libavfilter/vf_flip_vulkan.c
  • [DH] libavfilter/vf_format.c
  • [DH] libavfilter/vf_fspp.c
  • [DH] libavfilter/vf_gblur.c
  • [DH] libavfilter/vf_gblur_vulkan.c
  • [DH] libavfilter/vf_gradfun.c
  • [DH] libavfilter/vf_grayworld.c
  • [DH] libavfilter/vf_hflip.c
  • [DH] libavfilter/vf_histeq.c
  • [DH] libavfilter/vf_histogram.c
  • [DH] libavfilter/vf_hqdn3d.c
  • [DH] libavfilter/vf_hqx.c
  • [D

• avformat/matroskaenc : Don't use stream side-data size

  21 mai 2020, par Andreas Rheinhardt

  avformat/matroskaenc : Don't use stream side-data size
  av_stream_get_side_data() tells the caller whether a stream has side
  
  data of a specific type ; if present it can also tell the caller the size
  
  of the side data via an optional argument. The Matroska muxer always
  
  used this optional argument, although it doesn't really need the size,
  
  as the relevant side-data are not buffers, but structures. So change
  
  this.
  Furthermore, relying on the size also made the code susceptible to
  
  a quirk of av_stream_get_side_data() : It only sets the size argument if
  
  it found side data of the desired type. mkv_write_video_color() checks
  
  for side-data twice with the same variable for the size without resetting
  
  the size in between ; if the second type of side-data isn't present, the
  
  size will still be what it was after the first call. This was not
  
  dangerous in practice, as the check for the existence of the second
  
  side-data compared the size with the expected size, so it would only be
  
  problematic if lots of elements were to be added to AVContentLightMetadata.
  Reviewed-by : James Almer <jamrial@gmail.com>
  
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
  

  • [DH] libavformat/matroskaenc.c