diff --git a/index.html b/index.html index 535bde2..6e96ed2 100644 --- a/index.html +++ b/index.html @@ -119,7 +119,7 @@
ffmpeg
starts the command
-i input_file
path, name and extension of the input file
-c:v libx264
tells ffmpeg to change the video codec of the file to H.264
-
-pix_fmt yuv420p
libx264 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. QuickTime and most other non-FFmpeg based players can’t decode H.264 files that are not 4:2:0. In order to allow the video to play in all players, you can specify 4:2:0 chroma subsampling.
+
-pix_fmt yuv420p
libx264 will use a chroma subsampling scheme that is the closest match to that of the input. This can result in Y′CBCR 4:2:0, 4:2:2, or 4:4:4 chroma subsampling. QuickTime and most other non-FFmpeg based players can’t decode H.264 files that are not 4:2:0. In order to allow the video to play in all players, you can 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
@@ -452,7 +452,7 @@

Deinterlace a video

-

ffmpeg -i input_file -c:v libx264 -vf "yadif,format=pix_fmts=yuv420p" output_file

+

ffmpeg -i input_file -c:v libx264 -vf "yadif,format=pix_fmts=yuv420p" output_file

This command takes an interlaced input file and outputs a deinterlaced H.264 MP4.

ffmpeg
starts the command
@@ -462,13 +462,13 @@
"
start of filtergraph (see below)
yadif
deinterlacing filter (‘yet another deinterlacing filter’)
,
separates filters
-
format=pix_fmts=yuv420p
chroma subsampling set to 4:2:0
- By default, libx264 will use a chroma subsampling scheme that is the closest match to that of the input. This can result in Y′CbCr 4:2:0, 4:2:2, or 4:4:4 chroma subsampling. QuickTime and most other non-FFmpeg based players can’t decode H.264 files that are not 4:2:0, therefore it's advisable to specify 4:2:0 chroma subsampling.
+
format=pix_fmts=yuv420p
chroma subsampling set to 4:2:0
+ By default, libx264 will use a chroma subsampling scheme that is the closest match to that of the input. This can result in Y′CBCR 4:2:0, 4:2:2, or 4:4:4 chroma subsampling. QuickTime and most other non-FFmpeg based players can’t decode H.264 files that are not 4:2:0, therefore it's advisable to specify 4:2:0 chroma subsampling.
"
end of filtergraph
output file
path, name and extension of the output file

For more H.264 encoding options, see the latter section of the encode H.264 command.

-

"yadif,format=pix_fmts=yuv420p" is an ffmpeg filtergraph. Here the filtergraph is made up of one filter chain, which is itself made up of the two filters (separated by the comma).
+

"yadif,format=pix_fmts=yuv420p" is an ffmpeg filtergraph. Here the filtergraph is made up of one filter chain, which is itself made up of the two filters (separated by the comma).
The enclosing quote marks are necessary when you use spaces within the filtergraph, e.g. -vf "yadif, format=pix_fmts=yuv420p", and are included above as an example of good practice.

Example