Differences

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--- cheatsheet:ffmpeg [2025/08/16 02:26] – melo
+++ cheatsheet:ffmpeg [2026/07/16 00:33] (current) – melo
@@ Line 5: / Line 5: @@
 [[https://cheat-sheets.org/project/tldr/command/ffmpeg/|ffmpeg TLDR]], [[http://cheat.sh/ffmpeg|ffmpeg cheat.sh]]
-==== audio ====
+==== audio conversion ====
 === FLAC to MP3 ===
-one-off:
 <code bash>
 ffmpeg -i "$FILE.flac" -ab 320k -map_metadata 0 -id3v2_version 3 "$FILE.mp3"
-</code>
-bash loop:
-<code bash>
-for f in *.flac; do ffmpeg -i "$f" -ab 320k -map_metadata 0 -id3v2_version 3 "${f%.*}.mp3"; done
 </code>
 ==== video to frames ====
-see ''~/.local/bin/vidtools'' ([[https://bytes.4-walls.net/kat/dotfiles/src/commit/73e1380fd1dd186ce5925ab20b4529b4928e91cf/config/.local/bin/vidtools#L11|dotfiles]]) for the default/most used option (every frame including duplicates).
+see ''~/.local/bin/vidtools'' ([[https://bytes.4-walls.net/kat/dotfiles/src/commit/main/config/.local/bin/vidtools|dotfiles]]) for the default/most used option (every frame including duplicates).
 === 1/1 frames ===
@@ Line 35: / Line 27: @@
 <code bash>
 ffmpeg -i "$FILE" -filter:v fps=fps=1/2 %04d.jpg
+</code>
+=== avoid dupe frames ===
+<code bash>
+ffmpeg -i "$f" -vf mpdecimate,setpts=N/FRAME_RATE/TB "%04d.png"
+</code>
+==== cut based on timestamps ====
+<code bash>
+# cut from the first minute to the second minute
+ffmpeg -i "$FILE" -ss 00:01:00 -to 00:02:00 "$NEWFILE"
+</code>
+==== scale/resize ====
+<code bash>
+# replace 540 with 480, 720, 1080, etc
+ffmpeg -i "$FILE" -vf scale=-1:540 "$NEWFILE"
 </code>
@@ Line 56: / Line 68: @@
 <code bash>
-for f in *.mkv; do ffmpeg -hwaccel cuda -hwaccel_output_format cuda -i "$f" -c:v hevc_nvenc -vtag hvc1 -profile main -preset slow -rc vbr_hq -c:a copy -c:s copy -map 0 "${f%.*} HEVC.mkv"; done
+for f in *.mkv; do ffmpeg -hwaccel cuda -hwaccel_output_format cuda -i "$f" -c:v hevc_nvenc -qmin 24 -qmax 24 -vtag hvc1 -profile main -preset slow -rc vbr_hq -c:a copy -c:s copy -map 0 "${f%.*} HEVC.mkv"; done
 </code>