{"id":1967,"date":"2022-03-12T18:08:49","date_gmt":"2022-03-12T08:08:49","guid":{"rendered":"https:\/\/blog.hegars.com\/?p=1967"},"modified":"2022-03-12T18:08:49","modified_gmt":"2022-03-12T08:08:49","slug":"ffmpeg-generate-noise-and-then-beep","status":"publish","type":"post","link":"https:\/\/blog.hegars.com\/?p=1967","title":{"rendered":"FFMPEG Generate Noise and Then beep"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">!\/bin\/bash<\/h1>\n\n\n\n<p>ffmpeg -hide_banner -loglevel error -filter_complex &#8220;ladspa=file=cmt:noise_source_white:c=c0=.1&#8221; -f alsa default &amp;<\/p>\n\n\n\n<p>while :<\/p>\n\n\n\n<p>do<br>ffmpeg -hide_banner -loglevel error -f lavfi -i &#8220;sine=frequency=2525:duration=0.25:sample_rate=8000&#8221; -ab 8k -ac 1 -codec:a pcm_mulaw -f alsa default<br>ffmpeg -hide_banner -loglevel error -f lavfi -i &#8220;sine=frequency=2475:duration=0.25:sample_rate=8000&#8221; -ab 8k -ac 1 -codec:a pcm_mulaw -f alsa default<br>sleep 60<br>done<\/p>\n","protected":false},"excerpt":{"rendered":"<p>!\/bin\/bash ffmpeg -hide_banner -loglevel error -filter_complex &#8220;ladspa=file=cmt:noise_source_white:c=c0=.1&#8221; -f alsa default &amp; while : doffmpeg -hide_banner -loglevel error -f lavfi -i &#8220;sine=frequency=2525:duration=0.25:sample_rate=8000&#8221; -ab 8k -ac 1 -codec:a pcm_mulaw -f alsa defaultffmpeg -hide_banner -loglevel error -f lavfi -i &#8220;sine=frequency=2475:duration=0.25:sample_rate=8000&#8221; -ab 8k -ac 1 -codec:a pcm_mulaw -f alsa defaultsleep 60done<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1967"}],"collection":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1967"}],"version-history":[{"count":1,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1967\/revisions"}],"predecessor-version":[{"id":1968,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=\/wp\/v2\/posts\/1967\/revisions\/1968"}],"wp:attachment":[{"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1967"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1967"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.hegars.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1967"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}