[FFmpeg-devel] [PATCH]lavc/x264: Improve level setting

[Carl Eugen Hoyos]

On Tuesday 12 January 2016 02:31:48 pm Michael Niedermayer wrote:
> > > > +            level_id = atoi(x4->level);
> > >
> > > this should check that teres no "tail" after the integer
> >
> > For which command line will this make a difference?
> > I didn't find one...
>
> didnt try but i was thinking of something like 11.8

ffmpeg -f lavfi -i testsrc=s=hd1080 -pix_fmt yuv420p -t 1 
-level 11.8 -preset veryslow out.mov
ffmpeg version N-77804-gd64d6ed Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl --enable-libx264
  libavutil      55. 13.100 / 55. 13.100
  libavcodec     57. 22.100 / 57. 22.100
  libavformat    57. 21.101 / 57. 21.101
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6. 23.100 /  6. 23.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, lavfi, from 'testsrc=s=hd1080':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 1920x1080 [SAR 
1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
[libx264 @ 0x29335c0] Error parsing option 'level' with value '11.8'.
Output #0, mov, to 'out.mov':
    Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 25 fps
    Metadata:
      encoder         : Lavc57.22.100 libx264
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
Error while opening encoder for output stream #0:0 - maybe incorrect 
parameters such as bit_rate, rate, width or height

Carl Eugen