From 704a87f22cc24527f1d570feeae59c671fa54bec Mon Sep 17 00:00:00 2001 From: kfrn Date: Tue, 9 May 2017 20:46:51 +1200 Subject: [PATCH] Minor wording amendment --- index.html | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/index.html b/index.html index 3bbe068..85a79fe 100644 --- a/index.html +++ b/index.html @@ -60,10 +60,10 @@
ffmpeg
starts the command
-i input_file
path and name of the input file
The extension for the Matroska container is .mkv.
-
-c:v copy
re-encodes using the same video codec
-
-c:a aac
re-encodes using the AAC audio codec
+
-c:v copy
copies the video stream without re-encoding it
+
-c:a aac
re-encodes the audio stream using the AAC audio codec
Note that sadly MP4 cannot contain sound encoded by a PCM (Pulse-Code Modulation) audio codec.
- For silent videos you can replace -c:a aac by -an.
+ For silent videos you can replace -c:a aac by -an, which means that there will be no audio track in the output file.
output_file
path and name of the output file
The extension for the MP4 container is .mp4.
@@ -129,9 +129,9 @@
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
+
-c:v libx264
tells ffmpeg to encode the video stream as 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 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
+
-c:a copy
tells ffmpeg to copy the audio stream without re-encoding it
output_file
path, name and extension of the output file

In order to use the same basic command to make a higher quality file, you can add some of these presets:

@@ -656,7 +656,7 @@ - +