[FFmpeg-user] Flv to Png

[Dmitry Altsyvanovych]

Hi, 

I use Your soft and it is very useful for me.
But I can’t understand how to convert some fly to png. I know that for simple videos it’s very easy, but I generate a video 161 bytes with headers and 1 chunk of video stream. I use this tutorial http://www.wowza.com/forums/showthread.php?577-Custom-module-to-create-single-frame-snapshots-of-live-and-VOD-stream <http://www.wowza.com/forums/showthread.php?577-Custom-module-to-create-single-frame-snapshots-of-live-and-VOD-stream> . But I can’t create png from video file. I receive output 

ffmpeg version 2.4.3 Copyright (c) 2000-2014 the FFmpeg developers
  built on May  7 2015 14:20:33 with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.4.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-vda
  libavutil      54.  7.100 / 54.  7.100
  libavcodec     56.  1.100 / 56.  1.100
  libavformat    56.  4.101 / 56.  4.101
  libavdevice    56.  0.100 / 56.  0.100
  libavfilter     5.  1.100 /  5.  1.100
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  0.100 /  3.  0.100
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  0.100 / 53.  0.100
[flv @ 0x7fdfea00da00] Could not find codec parameters for stream 0 (Video: h264): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[flv @ 0x7fdfea00da00] Could not find codec parameters for stream 1 (Audio: none, 0 channels): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
dLR.flv: could not find codec parameters
Input #0, flv, from 'dLR.flv':
  Metadata:
    creationdate    : Fri Jul 17 17:03:12
  Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: h264, 1k tbr, 1k tbn, 1k tbc
    Stream #0:1: Audio: none, 0 channels
Output #0, image2, to 'q.png':
  Metadata:
    creationdate    : Fri Jul 17 17:03:12
Output file #0 does not contain any stream

Could you advise how can I create snapshot from this flv file?
I’ve attached flv file and report file.
 
 

Kind regards,
Dmitry Altsyvanovych