diff --git a/index.html b/index.html index 70b982c..23788f7 100644 --- a/index.html +++ b/index.html @@ -381,21 +381,20 @@

Images to GIF

Convert DVD to H.264

-

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

+

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

This command allows you to create an H.264 file from a DVD source that is not copy-protected.

Before encoding, you’ll need to establish which of the .VOB files on the DVD or .iso contain the content that you wish to encode. Inside the VIDEO_TS directory, you will see a series of files with names like VTS_01_0.VOB, VTS_01_1.VOB, etc. Some of the .VOB files will contain menus, special features, etc, so locate the ones that contain target content by playing them back in VLC.

ffmpeg
starts the command
-i concat:input files
lists the input VOB files and directs ffmpeg to concatenate them. Each input file should be separated by a backslash and a pipe, like so:
-i concat:VTS_01_1.VOB\|VTS_01_2.VOB\|VTS_01_3.VOB
- The backslash is simply an escape character for the pipe (|). + The backslash is simply an escape character for the pipe (|).
-c:v libx264
sets the video codec as H.264
-c:a copy
audio remains as-is (no re-encode)
output_file.mp4
path and name of the output file

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 -

+

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.
-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.
@@ -427,7 +426,7 @@

Transcode to H.265/HEVC

ffmpeg
starts the command
-i input file
path, name and extension of the input file
-c:v libx265
tells ffmpeg to encode the video as H.265
-
-pix_fmt yuv420p
libx265 will use a chroma subsampling scheme that is the closest match to that of the input. This can result in YUV 4:2:0, 4:2:2, or 4:4:4 chroma subsampling. For widest accessibility, it's a good idea to specify 4:2:0 chroma subsampling.
+
-pix_fmt yuv420p
libx265 will use a chroma subsampling scheme that is the closest match to that of the input. This can result in YUV 4:2:0, 4:2:2, or 4:4:4 chroma subsampling. For widest accessibility, it’s a good idea to specify 4:2:0 chroma subsampling.
-c:a copy
tells ffmpeg not to change the audio codec
output file
path, name and extension of the output file
@@ -600,6 +599,7 @@

Plays vectorscope of video

+ -
@@ -879,8 +878,8 @@

Generate two access MP3s from input. One with appended audio (such as copyri

This script allows you to generate two derivative audio files from a master while appending audio from a seperate file (for example a copyright or institutional notice) to one of them.

ffmpeg
starts the command
-
-i input_file
path, name and extension of the input file (The master file)
-
-i input_file_to_append
path, name and extension of the input file (The file to be appended to access file)
+
-i input_file
path, name and extension of the input file (the master file)
+
-i input_file_to_append
path, name and extension of the input file (the file to be appended to access file)
-filter_complex
enables the complex filtering to manage splitting the input to two audio streams
[0:a:0]asplit=2[a][b];
asplit allows audio streams to be split up for seperate manipulation. This command splits the audio from the first input (the master file) into two streams "a" and "b"
[b]afifo[bb];
this buffers the stream "b" to help prevent dropped samples and renames stream to "bb"