From 46fad11207308fc91a767b11b572238fd9df33a7 Mon Sep 17 00:00:00 2001 From: Anushka Raj Date: Thu, 3 Oct 2019 11:22:39 +0530 Subject: [PATCH] Update index.html --- index.html | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/index.html b/index.html index 85227a8..b809586 100644 --- a/index.html +++ b/index.html @@ -93,7 +93,7 @@
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Streaming vs. Saving

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Streaming vs. Saving

FFplay allows you to stream created video and FFmpeg allows you to save video.

The following command creates and saves a 10-second video of SMPTE bars:

ffmpeg -f lavfi -i smptebars=size=640x480 -t 5 output_file

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Filtergraphs

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Filtergraphs

Many FFmpeg commands use filters that manipulate the video or audio stream in some way: for example, hflip to horizontally flip a video, or amerge to merge two or more audio tracks into a single stream.

The use of a filter is signaled by the flag -vf (video filter) or -af (audio filter), followed by the name and options of the filter itself. For example, take the convert colorspace command:

ffmpeg -i input_file -c:v libx264 -vf colormatrix=src:dst output_file @@ -197,7 +197,7 @@

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Rewrap a file

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Rewrap a file

ffmpeg -i input_file.ext -c copy -map 0 output_file.ext

This script will rewrap a video file. It will create a new video video file where the inner content (the video, audio, and subtitle data) of the original file is unchanged, but these streams are rehoused within a different container format.

Note: rewrapping is also known as remuxing, short for re-multiplexing.

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Rewrap DV video to .dv file

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Rewrap DV video to .dv file

ffmpeg -i input_file -f rawvideo -c:v copy output_file.dv

This script will take a video that is encoded in the DV Codec but wrapped in a different container (such as MOV) and rewrap it into a raw DV file (with the .dv extension). Since DV files potentially contain a great deal of provenance metadata within the DV stream, it is necessary to rewrap files in this method to avoid unintentional stripping of this metadata.