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--- linux:allgemein:ffmpeg [24.02.2020 18:44]
marc gelöscht
+++ — (aktuell)
@@ Zeile 1: / Zeile 1: @@
-====== FFMPEG ======
-===== Konvertieren =====
-  $ ffmpeg -i input.avi output.mp4
-  $ ffmpeg -i input.avi -c:v libx264 -crf 23 output.mp4
-  $ ffmpeg -i input.avi -c:v libx265 -crf 28 output.mp4
-==== Mergen / Zusammenführen ====
-  $ ffmpeg -i "concat:input1.mpg|input2.mpg|input3.mpg" -c copy output.mpg
-==== Zeitlich schneiden ====
-  $ ffmpeg -i input.mp4 -ss 00:03:15 -t 05:16:50 output.mp4
-[HH:]MM:SS[.m...]
-==== oben und unten 350 px wegschneiden ====
-  $ ffmpeg -i input.mp4 -filter:v "crop=in_w:in_h-700" output.mp4
-==== Geschwindigkeit Faktor 1/2 (halbiert) ====
-  $ ffmpeg -i input.mp4 -filter_complex "[0:v]setpts=2.0*PTS[v];[0:a]atempo=0.5[a]" -map "[v]" -map "[a]" output.mp4
-==== Automatisiertes Konvertieren ====
-This is a typical scenario for find and xargs:
-  $ find /path/to/basedir -name '*.avi' -print0 | xargs -0 convert.sh
-where -print0 and -0 ensure the proper handling of names with spaces.
-And in convert.sh, you have your for loop, almost the same as in your first script:
-<code>
-#!/bin/bash
-for i; do
-        d=$(dirname "$i")
-#       b=$(basename "$i" | cut -d. -f1)
-        FILE=(basename "$i")
-        b=${FILE%.*}
-        ffmpeg -i "$i"  "$d/$b.mp4"
-#        ffmpeg -i "$i" -c:v libx265 -crf 23 -c:a copy "$d/X265_$b"
-done
-</code>
-for i without anything means the same as "for all arguments given", which are the files passed by xargs.
-To prepend the filename with a string, you must split the name into the directory and base part, and then put it together again.

Marc's Linux-Wiki (Gentoo, Debian)

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