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I have a one hour 4K video which was weighing in at 10 GB. I thought I'd try re-encoding to HEVC using FFmpeg to try to save space, something I hadn't tried before.

However, I switched the container format from .m4v to .mp4, which I didn't realize that QuickTime Player cannot play; it only supports HEVC streams inside of .mov containers. VLC can play the .mp4, so the conversion seems to have succeeded.

So I tried to switch the container format to .mov, but QuickTime still doesn't want to open it.

Is there an additional step I'm missing? The conversion ran overnight so I'd rather not do it again, if there's a way to simply change the container.

$ ffmpeg -i otomatsuri.m4v -c:v libx265 -preset medium -crf 28 -c:a aac -b:a 128k otomatsuri.mp4
ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  built with Apple LLVM version 9.1.0 (clang-902.0.30)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'otomatsuri.m4v':
  Metadata:
    major_brand     : M4V 
    minor_version   : 1
    compatible_brands: M4V M4A mp42isom
    creation_time   : 2018-02-09T09:37:48.000000Z
    encoder         : Lavf57.83.100
  Duration: 00:53:53.00, start: 0.000000, bitrate: 24377 kb/s
    Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 32000 Hz, mono, fltp, 95 kb/s (default)
    Metadata:
      creation_time   : 2018-02-09T09:37:48.000000Z
      handler_name    : Core Media Audio
    Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 2880x2160 [SAR 4:3 DAR 16:9], 24278 kb/s, 24 fps, 24 tbr, 60k tbn, 48 tbc (default)
    Metadata:
      creation_time   : 2018-02-09T09:37:48.000000Z
      handler_name    : Core Media Video
Stream mapping:
  Stream #0:1 -> #0:0 (h264 (native) -> hevc (libx265))
  Stream #0:0 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
x265 [info]: HEVC encoder version 2.6
x265 [info]: build info [Mac OS X][clang 9.0.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-5 (Main tier)
x265 [info]: Thread pool created using 4 threads
x265 [info]: Slices                              : 1
x265 [info]: frame threads / pool features       : 2 / wpp(34 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: 24 / 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=8 deblock sao
Output #0, mp4, to 'otomatsuri.mp4':
  Metadata:
    major_brand     : M4V 
    minor_version   : 1
    compatible_brands: M4V M4A mp42isom
    encoder         : Lavf57.83.100
    Stream #0:0(und): Video: hevc (libx265) (hev1 / 0x31766568), yuv420p, 2880x2160 [SAR 4:3 DAR 16:9], q=2-31, 24 fps, 12288 tbn, 24 tbc (default)
    Metadata:
      creation_time   : 2018-02-09T09:37:48.000000Z
      handler_name    : Core Media Video
      encoder         : Lavc57.107.100 libx265
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 32000 Hz, mono, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2018-02-09T09:37:48.000000Z
      handler_name    : Core Media Audio
      encoder         : Lavc57.107.100 aac
frame=77592 fps=2.8 q=-0.0 Lsize= 1670478kB time=00:53:52.93 bitrate=4232.9kbits/s speed=0.117x    
video:1624946kB audio:43103kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.145604%
x265 [info]: frame I:    738, Avg QP:25.05  kb/s: 9283.77 
x265 [info]: frame P:  20942, Avg QP:27.55  kb/s: 6165.77 
x265 [info]: frame B:  55912, Avg QP:31.10  kb/s: 3280.92 
x265 [info]: Weighted P-Frames: Y:21.5% UV:15.2%
x265 [info]: consecutive B-frames: 7.8% 10.9% 15.9% 46.2% 19.1% 

encoded 77592 frames in 27541.51s (2.82 fps), 4116.63 kb/s, Avg QP:30.09
[aac @ 0x7fd6d7801e00] Qavg: 58695.016
$ ffmpeg -i otomatsuri.mp4 -c copy -map 0  otomatsuri.mov
ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
  built with Apple LLVM version 9.1.0 (clang-902.0.30)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'otomatsuri.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf57.83.100
  Duration: 00:53:53.00, start: 0.000000, bitrate: 4232 kb/s
    Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 2880x2160 [SAR 4:3 DAR 16:9], 4117 kb/s, 24 fps, 24 tbr, 12288 tbn, 24 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 32000 Hz, mono, fltp, 109 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Output #0, mov, to 'otomatsuri.mov':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf57.83.100
    Stream #0:0(und): Video: hevc (Main) (hev1 / 0x31766568), yuv420p(tv, progressive), 2880x2160 [SAR 4:3 DAR 16:9], q=2-31, 4117 kb/s, 24 fps, 24 tbr, 12288 tbn, 12288 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 32000 Hz, mono, fltp, 109 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=77592 fps=18819 q=-1.0 Lsize= 1670479kB time=00:53:52.90 bitrate=4232.9kbits/s speed= 784x    
video:1624946kB audio:43103kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.145614%
  • 1
    It may just be an issue of codec tag. Try ffmpeg -i otomatsuri.mp4 -c copy -map 0 -vtag hvc1 otomatsuri.mov – Gyan Feb 10 '18 at 5:36
  • @Mulvya Yes this is it. Want to post as an answer so I can accept it? – rgov Feb 10 '18 at 13:07
2

Some players rely on metadata to identify if the contents of the file can be used. QT belongs to this category. As confirmed in comments, assigning a codec tag of hvc1 allows playback in QT,

ffmpeg -i otomatsuri.mp4 -c copy -map 0 -vtag hvc1 otomatsuri.mov
  • And I think an all-in one conversion is: ffmpeg -i tomatina.m4v -c:v libx265 -preset medium -crf 28 -vtag hvc1 -c:a aac -b:a 128k tomatina.mov – rgov Feb 10 '18 at 15:28

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