NOTES

Notes that I find usefull.

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Extract audio using FFmpeg

To extract the audio stream without re-encoding:

ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac

• -vn is no video.
• -acodec copy says use the same audio stream that's already in there.

Read the output to see what codec it is, to set the right filename extension.

Source

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Encoding HAP videos using FFmpeg

Use the following commands in either CMD or Powershell to encode Hap videos.

To encode HAP

fmpeg -i INPUT_VIDEONAME -vcodec hap -format hap NEW_HAP_VIDEONAME.mov

To encode HAP Q

ffmpeg -i INPUT_VIDEONAME -vcodec hap -format hap_q NEW_HAP_Q_VIDEONAME.mov

To encode HAP Alpha

ffmpeg -i INPUT_VIDEONAME -vcodec hap -format hap_alpha NEW_HAP_ALPHA_VIDEONAME.mov

Encode HAP Q using Chunks

When encoding highresolution videos it’s recommended to use the so called chunked encoding mode:

ffmpeg -i INPUT_VIDEONAME -vcodec hap -format hap_q -chunks 8 NEW_HAP_Q_CHUNKED_VIDEONAME.mov

This will convert the input movie to Hap Q encoded movie using 8 chunks, which means that the Hap plugin can decode the movie using 8 threads imultaneously, giving a major performance gain, as long as the storage is able to provide needed throughput.

Source