Date: Mon, 24 Jan 2011 08:45:44 +0100 From: Polytropon <freebsd@edvax.de> To: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: TV test image generator using mencoder Message-ID: <20110124084544.579885f9.freebsd@edvax.de>
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For an amateur TV (ham) project, I'm searching for a convenient way to create a test image DVD or CD using FreeBSD's port mencoder. But I can't get this working. Maybe somebody on list has an idea of how to accomplish this. Input: a still image (jpg, gif, png) of a test picture, as shown on TV, already available Output: a VCD-compatible MPEG video file which shows the picture (which does not change) and plays a 1 kHz testing sound (sine wave); the length of "video" should be given in minutes More: a DVD-compatible output could be provided for better quality if needed The idea is this: With a set of, let's say 5 of such MPEG files, each lasting 10 minutes, I want to burn a VCD because that's what the player in use can play best. If it plays the in "repeat mode", every 10 minutes the test image will change, the sound will stay the same. The VCD can be done with mkvcdfs, I've already done that for other purposes, works good. As this player is a stand-alone device, there's no trouble getting a TV (video or even antenna) signal out of a PC. :-) Background: The test VCD can be played in continuous loop while the transmitter is running. This way, receiving tests can be done, as there is a good testing signal for making statements about video and audio quality. The combination of both, also using something standar- dized (instead of a camera input, showing the town from above or a look out of the window across the street) is buch better for making QUALIFIED statements about signal quality. Adjustments to the equipment can be done more easily. I've tried to do this with mencoder, but can't get any usable results. How would you suggest to get this done? -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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