So as I've described earlier, compression can amplify the noises, so you might want to run the result through a gate again:. Stream numbering is based on the order of the streams as detected by libavformat except when a stream group specifier or program ID is also specified. Create one or more streams in the output file. If coloring is supported by the terminal, colors are used to mark errors and warnings. The overlay filter, requiring two video inputs, uses the first two unused video streams.
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