vault backup: 2025-03-04 11:17:00

20.01. Programming/FFMPEG/ffmpeg command.md

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+## 列出 hardware acceleration
+```bash
+$ ffmpeg -hide_banner -hwaccels
+Hardware acceleration methods:
+cuda
+dxva2
+qsv
+d3d11va
+opencl
+vulkan
+```
+
+## 列出 codec
+```bash
+$ ffmpeg -hide_banner -codecs
+Codecs:
+ D..... = Decoding supported
+ .E.... = Encoding supported
+ ..V... = Video codec
+ ..A... = Audio codec
+ ..S... = Subtitle codec
+ ...I.. = Intra frame-only codec
+ ....L. = Lossy compression
+ .....S = Lossless compression
+ -------
+ D.VI.S 012v                 Uncompressed 4:2:2 10-bit
+ D.V.L. 4xm                  4X Movie
+ D.VI.S 8bps                 QuickTime 8BPS video
+ .EVIL. a64_multi            Multicolor charset for Commodore 64 (encoders: a64multi )
+ .EVIL. a64_multi5           Multicolor charset for Commodore 64, extended with 5th color (colram) (encoders: a64multi5 )
+ D.V..S aasc                 Autodesk RLE
+```
+
+### 只列出 encoder 或是 decoder
+```bash
+ffmpeg -hide_banner -encoders
+ffmpeg -hide_banner -decoders
+```
+
+### 列出某個 encoder 或 decoder 的詳細資料
+```bash
+$ ffmpeg -hide_banner -h encoder=<codec_name>
+or
+$ ffmpeg -hide_banner -h decoder=<codec_name>
+```