<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br><div><br><blockquote type="cite"><div><br></div><div><div style="caret-color: rgb(0, 0, 0); font-family: Palatino-Roman; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><blockquote type="cite"><div><div dir="ltr"><div class="gmail_quote"><div><br></div><div>I don't know if it will help you, but as of Mythtv v33, the mythexternrecorder application now lets you set "per channel" tuning command. See:</div><div><a href="https://www.mythtv.org/wiki/Example_Configuration_files#Mythtv_v33_Example">https://www.mythtv.org/wiki/Example_Configuration_files#Mythtv_v33_Example</a></div><div><br></div><div>That means your tuning command could be a no-op for specific channels that you have defined.</div><div><br></div><div>John<br></div></div></div></div></blockquote><br></div><div style="caret-color: rgb(0, 0, 0); font-family: Palatino-Roman; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><br></div></div></blockquote><br></div><div>So I have been ‘experimenting’ with this and I think I have set up something incorrect for incoming video. </div><div><br></div><div>The hdmi device is usb, one of those that are 10-20 bucks, and from what I can tell it is creating a v4l2 mjpeg video stream with a PCM audio stream on USB audio. </div><div><br></div><div>Using ffmpeg, I can create an avi with it, and also an mkv with it , and have tried multiple ways to create an output stream for mythtv to use.</div><div><br></div><div>I am trying to keep processing down to a minimal amount since I am trying to use a Raspberry Pi 4b with 4GB ram running mythbackend to capture the video stream.</div><div><br></div><div>If I try to use any mpeg2 or mp4 transcoding, I get in trouble with using too much cpu. Any ideas as to what I can try to capture with little or no transcoding effort on the RPI 4b? Or am I asking too much from the RPI4 to capture it.</div><div><br></div><div>Regards!</div><div><br></div><div><br></div><div><br></div><div><br></div></body></html>