Sample Aspect Ratio width must be greater than 0 (libx265)

[Bernardo]

Summary of the bug:
I was trying h.265 encoding with libx265 and for the video files I tried, it showed an error:

x265 [error]: Sample Aspect Ratio width must be greater than 0

The only way to make it start encoding was to use the "setsar" filter, but the final video is not playable. This is the output when playing the file (repeated some 1000x):

[hevc @ 0x911020] PPS id out of range: 0
[hevc @ 0x911020] Error parsing NAL unit #0.

Is there a simple command line that is known to work with libx265 for sure?

How to reproduce:

ffmpeg -y -i Madeon_filtered.mp4 -c:v libx265 -b:v 500K -c:a copy -strict experimental Madeon_H265.mp4

ffmpeg version N-50947-gc05065a Copyright (c) 2000-2014 the FFmpeg developers
  built on Mar 26 2014 08:05:26 with gcc 4.8 (Ubuntu/Linaro 4.8.1-10ubuntu9)
  configuration: --enable-gpl --enable-libass --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libspeex --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-x11grab --enable-libx264 --enable-nonfree --enable-version3 --enable-libfreetype --enable-libopus --enable-shared --enable-libx265
  libavutil      52. 69.100 / 52. 69.100
  libavcodec     55. 54.100 / 55. 54.100
  libavformat    55. 35.101 / 55. 35.101
  libavdevice    55. 11.100 / 55. 11.100
  libavfilter     4.  3.100 /  4.  3.100
  libswscale      2.  5.102 /  2.  5.102
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Madeon_filtered.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf55.2.100
  Duration: 00:03:55.20, start: 0.046440, bitrate: 6766 kb/s
    Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 / 0x31637661), yuv444p, 640x358, 6632 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
x265 [error]: Sample Aspect Ratio width must be greater than 0
[libx265 @ 0xd3e320] Cannot open libx265 encoder.
Output #0, mp4, to 'Madeon_H265.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf55.2.100
    Stream #0:0(und): Video: hevc, yuv444p, 640x358, q=2-31, 500 kb/s, 90k tbn, 23.98 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac, 44100 Hz, stereo, 128 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx265)
  Stream #0:1 -> #0:1 (copy)
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

[Carl Eugen Hoyos]

Please provide a (short) input sample.

[Bernardo]

First 2 seconds of the file used before. Shows the same problem.

[raine]

Arch Linux wiki suggests setting -aspect manually as a workaround: ​https://wiki.archlinux.org/index.php/FFmpeg#x265

[Michael Niedermayer]

cant reproduce, i assume it has been fixed by derek in cdd21f1f03c5d59aad8f0244b1be0f864d8416a7