Is melt appropriate for this? I have a hardware hdmi frame grabber that exposes itself as a 4vl2 device. I can view the stream with
mplayer tv:// -tv driver=v4l2:device=/dev/video1 I need to convert that to ntsc dvd and stream it to stdout just like dvgrab | foo I am trying to do the ffmpeg command under v4l2 http://dvswitch.alioth.debian.org/wiki/inputs/ current results: no image shows up on dvswtich (what dvsource-file connects to.) juser@dc10b:~/dvsmon$ avconv -f video4linux2 -r 25 -i /dev/video1 -f s16le -ar 48000 -ac 2 -i /dev/zero -target pal-dv - | dvsource-file /dev/stdin INFO: Reading from /dev/stdin INFO: Connecting to room701.local:2000 avconv version 9.18-6:9.18-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav developers built on Mar 16 2015 13:19:10 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1) [video4linux2 @ 0x2574660] The driver changed the time per frame from 1/25 to 2/15 [video4linux2 @ 0x2574660] The v4l2 frame is 1004509 bytes, but 1572864 bytes are expected [video4linux2 @ 0x2574660] Estimating duration from bitrate, this may be inaccurate Input #0, video4linux2, from '/dev/video1': Duration: N/A, bitrate: 94371 kb/s Stream #0.0: Video: rawvideo, yuyv422, 1024x768, 94371 kb/s, 1000k tbn, 7.50 tbc [s16le @ 0x25756a0] Estimating duration from bitrate, this may be inaccurate Guessed Channel Layout for Input Stream #1.0 : stereo Input #1, s16le, from '/dev/zero': Duration: N/A, start: 0.000000, bitrate: N/A Stream #1.0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Output #0, dv, to 'pipe:': Metadata: encoder : Lavf54.20.4 Stream #0.0: Video: dvvideo, yuv420p, 720x576, q=2-31, 200 kb/s, 90k tbn, 25 tbc Stream #0.1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Stream mapping: Stream #0:0 -> #0:0 (rawvideo -> dvvideo) Stream #1:0 -> #0:1 (pcm_s16le -> pcm_s16le) Press ctrl-c to stop encoding [video4linux2 @ 0x2574660] The v4l2 frame is 1055140 bytes, but 1572864 bytes are expected frame= 0 fps= 0 q=0.0 size= 0kB time=10718.61 bitrate= 0.0kbits/s frame= 0 fps= 0 q=0.0 size= 0kB time=11666.28 bitrate= 0.0kbits/s frame= 0 fps= 0 q=0.0 size= 0kB time=12582.72 bitrate= 0.0kbits/s ... -- Carl K
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