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synthead

Member

Registered: 2006-05-09

Posts: 1,337

Help with ffmpeg (creating a video from SWF)

What am I doing wrong?

$ ffmpeg -i connor.swf connor.avi
ffmpeg version 1.0 Copyright (c) 2000-2012 the FFmpeg developers
  built on Sep 29 2012 11:22:50 with gcc 4.7.1 (GCC) 20120721 (prerelease)
  configuration: --prefix=/usr --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx --enable-libtheora --enable-libgsm --enable-libspeex --enable-postproc --enable-shared --enable-x11grab --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libschroedinger --enable-libopenjpeg --enable-librtmp --enable-libpulse --enable-libv4l2 --enable-gpl --enable-version3 --enable-runtime-cpudetect --disable-debug --disable-static
  libavutil      51. 73.101 / 51. 73.101
  libavcodec     54. 59.100 / 54. 59.100
  libavformat    54. 29.104 / 54. 29.104
  libavdevice    54.  2.101 / 54.  2.101
  libavfilter     3. 17.100 /  3. 17.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[swf @ 0x1add240] SWF compressed file detected
[swf @ 0x1add240] max_analyze_duration 5000000 reached at 5000000
[swf @ 0x1add240] Could not find codec parameters for stream 0 (Audio: pcm_s16le, 5512 Hz, 1 channels, 88 kb/s): unspecified sample format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[swf @ 0x1add240] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for  Input Stream #0.0 : mono
Input #0, swf, from 'connor.swf':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Audio: pcm_s16le, 5512 Hz, mono, 88 kb/s
    Stream #0:1: Video: vp6f, yuv420p, 320x240, 30 fps, 30 tbr, 30 tbn
[graph 1 input from stream 0:0 @ 0x1ae5240] Invalid sample format '(null)'
Error opening filters!

ConnorBehan

Package Maintainer (PM)

From: Long Island NY

Registered: 2007-07-05

Posts: 1,359

Website

Re: Help with ffmpeg (creating a video from SWF)

There is no codec for playing an SWF file as if it were a video. SWF files allow interactivity so they are technically programs. You might be able to extract the useful bits as more standard files with "swftools" in [community]. Open source flash tools aren't perfect but for simple files, they can be pretty good.

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DrZaius

Member

Registered: 2008-01-02

Posts: 193

Re: Help with ffmpeg (creating a video from SWF)

It appears that the audio stream is the source of the problem. As the console output suggests, try increasing the value for the "-probesize" (default 5000000)  and "-analyzeduration" (default 5 [seconds]) options.  Failing that you can attempt to supply the correct sample format as an input option, or simply copy the audio with "-c:a copy" instead of trying to re-encode.