,
https://git.io/v5h2m in
Homebrew/homebrew-core
I don't think anything changed in v3.3.4 wrt libx265, and I can't reproduce:
```
$ brew kegs ffmpeg
/usr/local/Cellar/ffmpeg/3.3.4 (248 files, 54MB) *
Built from source on 2017-09-20 at 12:14:04 with: --with-fdk-aac --with-libass --with-openjpeg --with-openssl --with-rtmpdump --with-sdl2 --with-x265 --with-freetype --with-libvorbis --with-libvpx --with-opus --with-theora
$ ffmpeg -loglevel warning -y -f rawvideo -s hd720 -pix_fmt yuv420p -r 30 -t 5 -i /dev/zero sample-avc.mp4
$ ffprobe sample-avc.mp4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample-avc.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.71.100
Duration: 00:00:05.00, start: 0.000000, bitrate: 15 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 10 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
$ ffmpeg -loglevel warning -y -i sample-avc.mp4 -c libx265 sample-hevc.mp4
x265 [info]: HEVC encoder version 2.5
x265 [info]: build info [Mac OS X][clang 8.1.0][64 bit] 8bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-3.1 (Main tier)
x265 [info]: Thread pool created using 8 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 3 / wpp(12 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 2
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / on / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 1 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 rskip signhide tmvp strong-intra-smoothing
x265 [info]: tools: lslices=4 deblock sao
x265 [info]: frame I: 1, Avg QP:31.50 kb/s: 68.88
x265 [info]: frame P: 47, Avg QP:33.25 kb/s: 18.65
x265 [info]: frame B: 102, Avg QP:35.09 kb/s: 15.64
x265 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x265 [info]: consecutive B-frames: 29.2% 10.4% 18.8% 2.1% 39.6%
encoded 150 frames in 1.52s (98.47 fps), 16.94 kb/s, Avg QP:34.49
$ ffplay sample-hevc.mp4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample-hevc.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf57.71.100
Duration: 00:00:05.00, start: 0.000000, bitrate: 24 kb/s
Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 1280x720, 17 kb/s, 30 fps, 30 tbr, 15360 tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandler
2.28 M-V: -0.009 fd= 22 aq= 0KB vq= 5KB sq= 0B f=0/0
```
Need a sample, and you should probably provide all relevant info listed on https://ffmpeg.org/bugreports.html. Also, it's probably an upstream issue.