From b1a5f14e8c6f72d86cab05f29f76b0f7ee55b0c0 Mon Sep 17 00:00:00 2001 From: Reto Kromer Date: Mon, 8 May 2017 20:32:00 +0200 Subject: [PATCH] uniformise typography vu en passant --- index.html | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/index.html b/index.html index d3ae032..bd94c3d 100644 --- a/index.html +++ b/index.html @@ -98,7 +98,7 @@
  • 2 = ProRes 422 (Standard)
  • 3 = ProRes 422 (HQ)
    • -
    -vf yadif
    Runs a deinterlacing video filter (yet another deinterlacing filter) on the new file
    +
    -vf yadif
    Runs a deinterlacing video filter (yet another deinterlacing filter) on the new file. -vf is an alias for -filter:v.
    -c:a pcm_s16le
    Tells ffmpeg to encode the audio stream in 16-bit linear PCM
    output_file
    path, name and extension of the output file
    The extension for the QuickTime container is .mov.
    @@ -156,11 +156,11 @@

    H.264 from DCP

    ffmpeg -i input_video_file.mxf -i input_audio_file.mxf -c:v libx264 -pix_fmt yuv420p -c:a aac output_file.mp4

    -

    This will transcode mxf wrapped video and audio files to an H.264 encoded .mp4 file. Please note this only works for unencrypted, single reel DCPs.

    +

    This will transcode MXF wrapped video and audio files to an H.264 encoded MP4 file. Please note this only works for unencrypted, single reel DCPs.

    ffmpeg
    starts the command
    -
    -i input_video_file
    path and name of the video input file. This extension must be .mxf
    -
    -i input_audio_file
    path and name of the audio input file. This extension must be .mxf
    +
    -i input_video_file
    path and name of the video input file. This extension must be .mxf
    +
    -i input_audio_file
    path and name of the audio input file. This extension must be .mxf
    -c:v libx264
    transcodes video to H.264
    -pix_fmt yuv420p
    sets pixel format to yuv420p for greater compatibility with media players
    -c:a aac
    re-encodes using the AAC audio codec
    @@ -201,7 +201,7 @@
    -slices 16
    Each frame is split into 16 slices. 16 is a good trade-off between filesize and encoding time. [more]
    -c:a copy
    copies all mapped audio streams.
    output_file.mkv
    path and name of the output file. Use the .mkv extension to save your file in a Matroska container. Optionally, choose a different extension if you want a different container, such as .mov or .avi.
    -
    -f framemd5
    Decodes video with the framemd5 muxer in order to generate md5 checksums for every frame of your input file. This allows you to verify losslessness when compared against the framemd5s of the output file.
    +
    -f framemd5
    Decodes video with the framemd5 muxer in order to generate MD5 checksums for every frame of your input file. This allows you to verify losslessness when compared against the framemd5s of the output file.
    -an
    ignores the audio stream when creating framemd5 (audio no)
    framemd5_output_file
    path, name and extension of the framemd5 file.
    @@ -228,7 +228,7 @@
    -pattern_type glob
    tells ffmpeg that the following mapping should "interpret like a glob" (a "global command" function that relies on the * as a wildcard and finds everything that matches)
    -i "input_image_*.jpg"
    maps all files in the directory that start with input_image_, for example input_image_001.jpg, input_image_002.jpg, input_image_003.jpg... etc.
    (The quotation marks are necessary for the above “glob” pattern!)
    -
    -vf scale=250x250
    filter the video to scale it to 250x250; -vf is an alias for -filter:v
    +
    -vf scale=250x250
    filter the video to scale it to 250x250; -vf is an alias for -filter:v
    output_file.gif
    path and name of the output file

    @@ -260,7 +260,7 @@

    It’s also possible to adjust the quality of your output by setting the -crf and -preset values:

    ffmpeg -i concat:input_file1\|input_file2\|input_file3 -c:v libx264 -crf 18 -preset veryslow -c:a copy output_file.mp4

    -
    -crf 18
    sets the constant rate factor to a visually lossless value. Libx264 defaults to a crf of 23, considered medium quality; a smaller crf value produces a larger and higher quality video.
    +
    -crf 18
    sets the constant rate factor to a visually lossless value. Libx264 defaults to a crf of 23, considered medium quality; a smaller CRF value produces a larger and higher quality video.
    -preset veryslow
    A slower preset will result in better compression and therefore a higher-quality file. The default is medium; slower presets are slow, slower, and veryslow.

    Bear in mind that by default, libx264 will only encode a single video stream and a single audio stream, picking the ‘best’ of the options available. To preserve all video and audio streams, add -map parameters:

    @@ -1032,7 +1032,7 @@
    -i input_file
    path, name and extension of the input file
    -aspect 4:3
    declares the aspect ratio of the resulting video file. You can also use 16:9.
    -target ntsc-dvd
    specifies the region for your DVD. This could be also pal-dvd.
    -
    output_file.mpg
    path and name of the output file. The extension must be .mpg
    +
    output_file.mpg
    path and name of the output file. The extension must be .mpg

    @@ -1089,10 +1089,10 @@
    [b]afifo[bb];
    this buffers the stream "b" to help prevent dropped samples and renames stream to "bb"
    [1:a:0][bb]concat=n=2:v=0:a=1[concatout]
    concat is used to join files. n=2 tells the filter there are two inputs. v=0:a=1 Tells the filter there are 0 video outputs and 1 audio output. This command appends the audio from the second input to the beginning of stream "bb" and names the output "concatout"
    -map "[a]"
    this maps the unmodified audio stream to the first output
    -
    -codec:a libmp3lame -dither_method modified_e_weighted -qscale:a 2
    sets up mp3 options (using constant quality)
    +
    -codec:a libmp3lame -dither_method modified_e_weighted -qscale:a 2
    sets up MP3 options (using constant quality)
    output_file
    path, name and extension of the output file (unmodified)
    -map "[concatout]"
    this maps the modified stream to the second output
    -
    -codec:a libmp3lame -dither_method modified_e_weighted -qscale:a 2
    sets up mp3 options (using constant quality)
    +
    -codec:a libmp3lame -dither_method modified_e_weighted -qscale:a 2
    sets up MP3 options (using constant quality)
    output_file_appended
    path, name and extension of the output file (with appended notice)