[mythtv-users] nuvexport - new version - no video

[Alan Snyder]

It looks to me like ffmpeg isn't seeing any video frames.  Underneath the continuous frame count, ffmpeg seems to sit there at frame 3.
 
As a test, I tried this manually:
 
mythtranscode -p Default -c 1004 -s 2003-07-26-19-00-00 -f fifodir --fifosync &
2003-09-01 17:20:38 Transcoding from /var/video/1004_20030726190000_20030726193000.nuv to /var/video/1004_20030726190000_20030726193000.nuv.tmp
2003-09-01 17:20:38 Enforcing sync on fifos
2003-09-01 17:20:38 Created video fifo: fifodir/vidout
2003-09-01 17:20:38 Created audio fifo: fifodir/audout
2003-09-01 17:20:38 Video 480x480 at 29.97fps Audio rate: 32000
2003-09-01 17:20:38 Created fifos. Waiting for connection.
2003-09-01 17:20:38 Audio is 99ms ahead of video at # 1

cat fifodir/audout >/dev/null &
(just so audio would have somewhere to go)
 
ffmpeg -f rawvideo -s 480x480 -r 29.97 -i fifodir/vidout -f mpeg1video test.mpg
(format chosen just as something I knew I could play back)
Input #0, rawvideo, from 'fifodir/vidout':
  Duration: N/A, bitrate: N/A
  Stream #0.0: Video: rawvideo, yuv420p, 480x480, 29.97 fps
Output #0, mpeg1video, to 'test.mpg':
  Stream #0.0: Video: mpeg1video, 480x480, 29.97 fps, q=2-31, 200 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop encoding
2003-09-01 17:21:04 Audio is 70ms ahead of video at # 3
2003-09-01 17:21:04 Audio is 36ms ahead of video at # 5
2003-09-01 17:21:05 Audio is 38ms behind video at # 42
2003-09-01 17:21:33 Audio is 34ms behind video at # 31924kbits/s
2003-09-01 17:22:45 Audio is 35ms ahead of video at # 11507its/s
2003-09-01 17:22:53 Audio is 65ms ahead of video at # 12406its/s
2003-09-01 17:22:53 Audio is 38ms ahead of video at # 12416
2003-09-01 17:23:12 Audio is 34ms ahead of video at # 14599its/s
2003-09-01 17:23:17 Audio is 35ms behind video at # 15259kbits/s
2003-09-01 17:24:03 Audio is 34ms ahead of video at # 20489its/s
2003-09-01 17:25:27 Audio is 36ms behind video at # 30182kbits/s
2003-09-01 17:25:27 Audio is 34ms ahead of video at # 30188its/s
2003-09-01 17:25:37 Audio is 34ms behind video at # 31261kbits/s
2003-09-01 17:25:58 Audio is 39ms ahead of video at # 33738its/s
2003-09-01 17:27:27 Audio is 38ms ahead of video at # 43816its/s
2003-09-01 17:28:06 Audio is 34ms behind video at # 48161kbits/s
2003-09-01 17:28:26 Audio is 58ms ahead of video at # 50454its/s
frame=    3 q=2.0 size=      82kB time=0.1 bitrate=6729.4kbits/s

mythtranscode and ffmpeg work for 15 minutes and in the end I get an 82 Kb .mpg file - consistent with just a couple of frames.
 
myth is cvs from this morning.  ffmpeg is 0.4.7
 

Chris Petersen <lists at forevermore.net> wrote:
> Still not working for me. I do get a non-blank .mpg file now, but
> there is no picture, just sound, and a 30-minute file was only 42 MB. 
> I left the ssh log file at

I don't know what's going on here. It runs just fine for me if I use
toolame or mp2enc. From the look of the log, you're still not using the
most recent version (that "No header found. Assuming Raw PCM sound file"
message is from mp2enc, and means that ffmpeg isn't sending it wav data,
which I put into the latest version), and if you are (make sure you
don't have any old versions hiding somewhere in your path), I have no
idea what's going on.

>From the look of your console log, it seems that mpeg2enc or yuvdenoise
just stops running (but still reads the data, or the audio encode would
also stop). Have you tried converting a different show?

-Chris

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