avi with defect header won't work

[the_gamer]

Summary of the bug:
I can't ffmpeg get to cooperate with any videos created with the catcam ​http://www.mr-lee-catcam.de/
Videos work in vlc, windows media player, mplayer and mencoder can convert them. But ffmpeg won't do anything.

How to reproduce:

$ ffmpeg -c:v avrn -loglevel trace -an -r:v 30 -i PICT0001.AVI -vf scale=640:480 -an katze.mpg
ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers

built with gcc 6.1.1 (GCC) 20160707
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avisynth --enable-avresample --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libass --enable-libbluray --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-netcdf --enable-shared --enable-version3 --enable-x11grab
libavutil 55. 28.100 / 55. 28.100
libavcodec 57. 48.101 / 57. 48.101
libavformat 57. 41.100 / 57. 41.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 47.100 / 6. 47.100
libavresample 3. 0. 0 / 3. 0. 0
libswscale 4. 1.100 / 4. 1.100
libswresample 2. 1.100 / 2. 1.100
libpostproc 54. 0.100 / 54. 0.100

Splitting the commandline.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'avrn'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'trace'.
Reading option '-an' ... matched as option 'an' (disable audio) with argument '1'.
Reading option '-r:v' ... matched as option 'r' (set frame rate (Hz value, fraction or abbreviation)) with argument '30'.
Reading option '-i' ... matched as input file with argument 'PICT0001.AVI'.
Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'scale=640:480'.
Reading option '-an' ... matched as option 'an' (disable audio) with argument '1'.
Reading option 'katze.mpg' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument trace.
Successfully parsed a group of options.
Parsing a group of options: input file PICT0001.AVI.
Applying option c:v (codec name) with argument avrn.
Applying option an (disable audio) with argument 1.
Applying option r:v (set frame rate (Hz value, fraction or abbreviation)) with argument 30.
Successfully parsed a group of options.
Opening an input file: PICT0001.AVI.
[file @ 0x55e8ab72c060] Setting default whitelist 'file,crypto'
Probing avi score:100 size:2048
[avi @ 0x55e8ab72b820] Format avi probed with size=2048 and score=100
[avi @ 0x55e8ab72bf80] use odml:1
pos:14 tag: tag=LIST size=0x154
pos:18 list: tag=hdrl size=0x0
pos:20 tag: tag=avih size=0x38
pos:60 tag: tag=LIST size=0xa4
pos:64 list: tag=strl size=0x0
pos:6C tag: tag=strh size=0x38
pos:74 strh: tag=vids size=0xffffffff
[avi @ 0x55e8ab72b820] 1000000 33333 0
pos:AC tag: tag=strf size=0x28
pos:D4 video: tag=MJPG size=0x0
pos:DC tag: tag=strd size=0x28
pos:10C tag: tag=LIST size=0x5c
pos:110 list: tag=strl size=0x0
pos:118 tag: tag=strh size=0x38
pos:120 strh: tag=auds size=0xffffffff
[avi @ 0x55e8ab72b820] scale/rate is 1/0 which is invalid. (This file has been generated by broken software.)
[avi @ 0x55e8ab72b820] 1000000 33333 1
pos:158 tag: tag=strf size=0x10
[avi @ 0x55e8ab72b820] Invalid sample rate: 0
[AVIOContext @ 0x55e8ab7343a0] Statistics: 32768 bytes read, 0 seeks
PICT0001.AVI: Invalid data found when processing input

[Carl Eugen Hoyos]

Please provide a sample video.

[the_gamer]

I can only provide temporaly but here is a sample: ​https://drive.google.com/file/d/0B2OzieSeNyaYdW5LdkxYQk9aVHc/view?usp=sharing

[Carl Eugen Hoyos]

Regression since 5badcfe2 / d07aa3f0

[robijn]

VLC also tells me the header is defective.
This is a bug in catcam, not in ffmpeg. Send them a bug report.