[FFmpeg-user] command for taking pictures at second 1, 15 ,30?

[erwin mueller]

 Even if I am doing this:
['ffmpeg', '-i', 'http://192.168.100.111:9000/?action=stream', '-f', 'image2', '-vf', 'fps=1', '"/home/pi/cam/image003.jpg"', '-f', 'image2', '-vf', 'fps=1/15', '"/home/pi/img%03d.jpg"', '-vcodec', 'copy', '-an', '-bufsize', '2048k', '-t', '00:00:30', '-y', '/home/pi/cam/Klingel-20190524_224626.mp4']
MJPG Streamer Version: svn rev: 3:172M
 i: Using V4L2 device.: /dev/video0
 i: Desired Resolution: 1024 x 768
 i: Frames Per Second.: 24
 i: Format............: YUV
 i: JPEG Quality......: 80
ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
  configuration:
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
 o: www-folder-path...: /usr/local/www/
 o: HTTP TCP port.....: 9000
 o: username:password.: disabled
 o: commands..........: disabled
[mjpeg @ 0x1b34f30] EOI missing, emulating
Input #0, mpjpeg, from 'http://192.168.100.111:9000/?action=stream':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1024x768 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
Output #2, mp4, to '/home/pi/cam/Klingel-20190524_224626.mp4':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #2:0: Video: mjpeg (mp4v / 0x7634706D), yuvj420p(pc, bt470bg/unknown/unknown), 1024x768 [SAR 1:1 DAR 4:3], q=2-31, 25 tbr, 12800 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> mjpeg (native))
  Stream #0:0 -> #1:0 (mjpeg (native) -> mjpeg (native))
  Stream #0:0 -> #2:0 (copy)
Press [q] to stop, [?] for help
Output #0, image2, to '"/home/pi/cam/image003.jpg"':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #0:0: Video: mjpeg, yuvj420p(pc), 1024x768 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 1 fps, 1 tbn, 1 tbc
    Metadata:
      encoder         : Lavc58.35.100 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Output #1, image2, to '"/home/pi/img%03d.jpg"':
  Metadata:
    encoder         : Lavf58.20.100
    Stream #1:0: Video: mjpeg, yuvj420p(pc), 1024x768 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 0.07 fps, 0.07 tbn, 0.07 tbc
    Metadata:
      encoder         : Lavc58.35.100 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
[image2 @ 0x1b2c6a0] Could not open file : "/home/pi/cam/image003.jpg"te=N/A speed=0.255x
av_interleaved_write_frame(): Input/output error
frame=    1 fps=0.4 q=1.7 Lq=0.0 q=-1.0 size=N/A time=00:00:01.00 bitrate=N/A speed=0.422x
video:189kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Conversion failed!



I am really stocked in this issue. Any help is appreciated 



    Am Freitag, 24. Mai 2019, 00:11:56 MESZ hat James Darnley <james.darnley at gmail.com> Folgendes geschrieben:  
 
 On 2019-05-23 21:54, erwin mueller via ffmpeg-user wrote:
>  Hello,
> may I please ask for a one-line command.My two lines aren't working. I guess it is a filename issue.But I am sure there is a much smarter way to solve it:
> 

> Output #0, image2, to '"/home/pi/cam/img%03d.jpg"':

> Output #1, image2, to '"/home/pi/cam/img%03d.jpg"':

Why do you think writing to the same file twice will work as expected?
The first file will will be /home/pi/cam/img001.jpg for both outputs.

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