Date: Mon, 18 Aug 2014 13:02:29 +0200 From: Polytropon <freebsd@edvax.de> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Time code and hourly files with mencoder Message-ID: <20140818130229.80e2e06e.freebsd@edvax.de>
next in thread | raw e-mail | index | archive | help
The following complex of questions primarily aims at those participants of the questions list who have experience with mplayer, mencoder, and state security. ;-) I'm searching for some input regarding a FreeBSD-based surveillance project. The basic setting: a PC-type system equipped with a Hauppauge / BrookTree PCI TV card (with excellent support) connected to a video source (camera attached to "video in" cinch connector), and a sound card (onboard version) connected to a microphone. The computer has sufficient power (Intel Core2, 2 GB RAM, nVidia GPU). Designated software: mencoder. There will be no external signals, instead the recording will be started once, and then continue until ^C. I've done this in the past, but I'd like some fresh ideas and new input, especially because there are obstacles which I haven't encountered (and therefore solved) yet. What I need: 1. TC In a corner (for example top right) there should be a time code with a precision of one second, like this: 2014-08-18 12:50:32 The video source cannot supply it. It doesn't have to be a high quality font. If it looks like a 7 segment display, it's fully sufficient. More than date and time is not needed. How can this be added to the video "on the fly", during creation? 2. File separation For easier postprocessing, I need one file per hour of the day (24 files for one day) and a directory for each day, like this: 2014-08-16/ 2014-08-17/ 2014-08-18/ 2014-08-18_00.avi 2014-08-18_01.avi 2014-08-18_02.avi ... 2014-08-18_12.avi 2014-08-18_13.avi 2014-08-18_14.avi (contains 14:00:00 - 14:59:59) 2014-08-18_15.avi ... 2014-08-18_23.avi 2014-08-19/ 2014-08-20/ How is this to be implemented? How would you start mencoder every hour for one hour? What is the optimal way to keep track of the time in the controlling shell script? 3. File format The videos don't need to be high quality. 800x600 or the like would be sufficient (even less is okay). The audio also doesn't need to be HiFi. MP3 or maybe even GSM codecs are sufficient. What encoding options do you recommend? Comments and suggestions are highly welcome! -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20140818130229.80e2e06e.freebsd>