From df7eb5932fb19cb4fe4ba0cde21463cc189699a1 Mon Sep 17 00:00:00 2001 From: kfrn Date: Wed, 1 Mar 2017 03:58:29 +1300 Subject: [PATCH] Update deinterlace command: alt yadif mode, list other deinterlacers --- index.html | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/index.html b/index.html index 8bd4261..c242a3f 100644 --- a/index.html +++ b/index.html @@ -455,7 +455,7 @@

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=yuv420p" output_file

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

ffmpeg
starts the command
@@ -463,16 +463,18 @@
-c:v libx264
tells ffmpeg to encode the video stream as H.264
-vf
video filtering will be used
"
start of filtergraph (see below)
-
yadif
deinterlacing filter (‘yet another deinterlacing filter’)
+
yadif
deinterlacing filter (‘yet another deinterlacing filter’)
+ By default, yadif will output one frame for each frame. Outputting one frame for each field (thereby doubling the frame rate) with yadif=1 may produce visually better results.
,
separates filters
-
format=pix_fmts=yuv420p
chroma subsampling set to 4:2:0
+
format=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).
- 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.

+

"yadif,format=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=yuv420p", and are included above as an example of good practice.

+

Note: ffmpeg includes several deinterlacers apart from yadif: bwdif, w3fdif, kerndeint, and nnedi.

+

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

Example

Before and after deinterlacing: