adpcm_ima_amv ERROR: step_index errors

[pross]

FFmpeg spews out errors and does not decode audio for the attached file.

The file came with my media player (锐族X-02, based on Agptek A02). The audio/video both play back correctly on that device.

% ffplay adpcm_ima_amv_error.amv 
ffplay version N-79865-gdd2d26d Copyright (c) 2003-2016 the FFmpeg developers
  built with gcc 5.2.1 (Ubuntu 5.2.1-22ubuntu2) 20151010
  configuration: 
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 40.100 / 57. 40.100
  libavformat    57. 36.100 / 57. 36.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 45.100 /  6. 45.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0   ^M[avi @ 0x7f9a24009280] scale/rate is 0/0 which is invalid. (This file has been generated by broken software.)
    Last message repeated 1 times
Input #0, avi, from 'adpcm_ima_amv_error.amv':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: amv, yuvj420p(pc, bt470bg/unknown/unknown), 160x128, 30 fps, 30 tbr, 30 tbn
    Stream #0:1: Audio: adpcm_ima_amv ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 9 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24833
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 21 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24833
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 1 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24837
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 4 times
[swscaler @ 0x7f9a0c012c40] deprecated pixel format used, make sure you did set range correctly
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 3 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24834
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 16 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24836
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 3 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24836
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 11 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24835
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 3 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24834
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 3 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24835
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 4 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24834
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 4 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24835
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 28 times
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24834
[adpcm_ima_amv @ 0x7f9a240124a0] ERROR: step_index = 24832
    Last message repeated 2 times

[pross]

original filename: "All Rise、blue -.amv"

[Carl Eugen Hoyos]

Could be considered a regression since 479fb7b8 / b3084e29

[Elon Musk]

Fixed in 14992421df88514e64fb56cfa888eade918cfc19.