FFMPEG screen record on Mac OSX

 MAC OSX Hardware Acceleration is made through VideoToolbox
ffmpeg [...] -hwaccel videotoolbox [...]
ffmpeg [...] -c:v h264_videotoolbox [...]

# Obtain codec list
ffmpeg -codecs

# Set framerate (IMPORTANT! Always specify on input stream, otherwise could default to 1000kfps and it's bad)
ffmpeg [...] -framerate 30 [...]

# Show capture devices
ffmpeg -f avfoundation -list_devices true -i ""

# Capture WITHOUT compression (note: no-hwaccel)
ffmpeg [...] -c:v libx264 -crf 0 -preset ultrafast output.mkv

# Re-encode WITH compression later (note: no hw-accel)
ffmpeg -i output.mkv -c:v libx264 -crf 0 -preset veryslow output-smaller.mkv


# Take a screenshot of the video input device to correctly identify the source (no audio)
ffmpeg -f avfoundation -framerate 1 -t 1 -pix_fmt yuv420p -i "1" -frames:v 1 screenshot.jpg

# BAD -> hwacceleration sucks, QC35 audio sucks too, pixel format incorrect
# Record with no compression and hw-acceleration (note: -crf 0 = lossless)
# From screen and Bose QC35 over BT
ffmpeg -f avfoundation -framerate 30 -pix_fmt yuv420p -i "1:0" -c:v h264_videotoolbox -crf 0 -preset ultrafast output.mkv

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# RECORD with no compression and integrated mic audio
# TODO: check framerate (30 for code is overkill) and audio input
ffmpeg -f avfoundation -framerate 30 -pix_fmt yuyv422 -i "1:1" -crf 0 -preset ultrafast test-pixel-format.mkv

# Re-encode later with hw-acceleration (note: -crf 0 = lossless)
ffmpeg -i output.mkv -c:v h264_videotoolbox -crf 0 -preset veryslow output-smaller.mkv




# Print file metadata etc.
ffmpeg -i path/to/file.ext

# Convert all m4a files to mp3
for f in *.m4a; do ffmpeg -i "$f" -acodec libmp3lame -vn -b:a 320k "${f%.m4a}.mp3"; done

# Convert video from .foo to .bar
# -g : GOP, for searchability
ffmpeg -i input.foo -vcodec bar -acodec baz -b:v 21000k -b:a 320k -g 150 -threads 4 output.bar

# Convert image sequence to video
ffmpeg -r 18 -pattern_type glob -i '*.png' -b:v 21000k -s hd1080 -vcodec vp9 -an -pix_fmt yuv420p -deinterlace output.ext

# Combine video and audio into one file
ffmpeg -i video.ext -i audio.ext -c:v copy -c:a copy output.ext

# Listen to 10 seconds of audio from a video file
#
# -ss : start time
# -t  : seconds to cut
# -autoexit : closes ffplay as soon as the audio finishes
ffmpeg -ss 00:34:24.85 -t 10 -i path/to/file.mp4 -f mp3 pipe:play | ffplay -i pipe:play -autoexit