wmalossless sample breaks ffplay -autoexit

[Carl Eugen Hoyos]

The sample from ticket #2993 does not exit on eof with -autoexit.
​http://samples.ffmpeg.org/ffmpeg-bugs/trac/ticket2993/

$ ffplay vc1.wmv -autoexit
ffplay version N-56667-g32cde96 Copyright (c) 2003-2013 the FFmpeg developers
  built on Sep 26 2013 07:44:39 with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl
  libavutil      52. 46.100 / 52. 46.100
  libavcodec     55. 33.100 / 55. 33.100
  libavformat    55. 18.102 / 55. 18.102
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 87.100 /  3. 87.100
  libswscale      2.  5.100 /  2.  5.100
  libswresample   0. 17.103 /  0. 17.103
  libpostproc    52.  3.100 / 52.  3.100
Input #0, asf, from 'vc1.wmv':=    0KB vq=    0KB sq=    0B f=0/0
  Metadata:
    WMFSDKNeeded    : 0.0.0.0000
    DeviceConformanceTemplate: N1
    WM/WMADRCPeakReference: 32734
    WM/WMADRCPeakTarget: 32734
    WM/WMADRCAverageReference: 2710
    WM/WMADRCAverageTarget: 2710
    WMFSDKVersion   : 10.00.00.4054
    IsVBR           : 1
  Duration: 00:02:51.79, start: 0.000000, bitrate: 1112 kb/s
    Stream #0:0(eng): Video: vc1 (Advanced) (WMVA / 0x41564D57), yuv420p, 160x120, 571 kb/s, 24 tbr, 1k tbn, 1k tbc
    Stream #0:1(eng): Audio: wmalossless (c[1][0][0] / 0x0163), 44100 Hz, stereo, s16p, 677 kb/s
[wmalossless @ 0x7fafdc002820] buf size 0 invalid
[wmalossless @ 0x7fafdc002820] buf size 0 invalid
[wmalossless @ 0x7fafdc002820] buf size 0 invalid
[wmalossless @ 0x7fafdc002820] Found empty subframe
[wmalossless @ 0x7fafdc002820] buf size 0 invalid
    Last message repeated 22 times

...

$ ffplay vc1.wmv -an -autoexit
ffplay version N-56667-g32cde96 Copyright (c) 2003-2013 the FFmpeg developers
  built on Sep 26 2013 07:44:39 with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl
  libavutil      52. 46.100 / 52. 46.100
  libavcodec     55. 33.100 / 55. 33.100
  libavformat    55. 18.102 / 55. 18.102
  libavdevice    55.  3.100 / 55.  3.100
  libavfilter     3. 87.100 /  3. 87.100
  libswscale      2.  5.100 /  2.  5.100
  libswresample   0. 17.103 /  0. 17.103
  libpostproc    52.  3.100 / 52.  3.100
Input #0, asf, from 'vc1.wmv':=    0KB vq=    0KB sq=    0B f=0/0
  Metadata:
    WMFSDKNeeded    : 0.0.0.0000
    DeviceConformanceTemplate: N1
    WM/WMADRCPeakReference: 32734
    WM/WMADRCPeakTarget: 32734
    WM/WMADRCAverageReference: 2710
    WM/WMADRCAverageTarget: 2710
    WMFSDKVersion   : 10.00.00.4054
    IsVBR           : 1
  Duration: 00:02:51.79, start: 0.000000, bitrate: 1112 kb/s
    Stream #0:0(eng): Video: vc1 (Advanced) (WMVA / 0x41564D57), yuv420p, 160x120, 571 kb/s, 24 tbr, 1k tbn, 1k tbc
    Stream #0:1(eng): Audio: wmalossless (c[1][0][0] / 0x0163), 44100 Hz, stereo, s16p, 677 kb/s
 171.75 M-V: -0.038 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0

[Marton Balint]

My guess is that this is caused by 851a6e2f. Flushing the codec with the NULL packet where packet_size=0 is broken, because error is returned instead of 0.

[Michael Niedermayer]

Fixed in 4fb14f84926ebcf88222e2251f4b8141d6bec465