2017-12-02 22:02:37 +00:00
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Snippets
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Change container
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================
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2021-09-18 00:06:06 +00:00
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.. code:: shell
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2017-12-02 22:02:37 +00:00
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2021-09-18 00:06:06 +00:00
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ffmpeg \
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-i input.avi \
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-y output.mkv
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Record video device
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===================
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List formats
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------------
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.. code:: shell
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ffmpeg \
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-f v4l2 -list_formats all \
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-i /dev/video0
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Acquire fastly
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--------------
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.. code:: shell
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ffmpeg \
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-f v4l2 -use_wallclock_as_timestamps true \
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-video_size 1280x720 -framerate 60 \
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-input_format bgr24 \
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-i /dev/video0 \
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-vf vflip \
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-codec:v libx264 -preset ultrafast -qp 0 \
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-y ultrafast.mkv
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Cut and shrink
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--------------
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.. code:: shell
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ffmpeg -i ultrafast.mkv \
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-ss 00:00:01.000 -to 00:00:02.000 \
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-codec:v libx264 -preset veryslow -qp 0 \
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-y uf.mkv
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Compress for web
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----------------
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.. code:: shell
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ffmpeg -i uf.mkv \
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-codec:v libx264 -preset veryslow -qp 23 \
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-movflags +faststart -pix_fmt yuv420p \
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-y uf.23.mkv
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Cut file
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========
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.. code:: shell
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ffmpeg \
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-i input.mkv \
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-ss 00:00:01.000 \
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-to 00:00:02.000 \
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-codec copy \
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-y output.mkv
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Closest I frames
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----------------
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.. code:: shell
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ffmpeg \
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-ss 00:00:01.000 \
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-i input.mkv \
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-to 00:00:02.000 \
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-codec copy \
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-y output.mkv
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