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%
ffmpeg -i otomatsuri.mp4 -c copy -map 0 -vtag hvc1 otomatsuri.mov