[FFmpeg-user] fMP4 generation speed

[Ronak]

Hi all,

So we're investigating using ffmpeg to generate fMP4 assets at a 1s fragmentation size for our audio content. Our content has no video.

We've noticed that ffmpeg is really slow at segmenting the content at such a small fragmentation size.

What's the reason behind this?

Here's the command we're running: ffmpeg -i "${FILE}.mp4" -codec copy -hls_time 9.75238095238095 -hls_segment_type fmp4 -hls_flags single_file+append_list -hls_playlist_type vod "${FILE}_10sec_v7.m3u8"

There's no encoding here, so what's causing ffmpeg to take so long?

Ronak