[FFmpeg-user] Confusion about quality parameters
Ulf Zibis
Ulf.Zibis at gmx.de
Tue Jun 25 15:48:58 EEST 2019
Am 25.06.19 um 14:15 schrieb Ulf Zibis:
> Hi,
>
> my input is a 1.5 minute mp4 video with 19.5 MB
>
> When I use (with build from dev):
> ./ffmpeg in.mp4 -c:a copy out.mp4
> ffmpeg version N-93873-g6276b4db97 Copyright (c) 2000-2019 the
> FFmpeg developers
> built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04)
> in the output lines e.g.
> frame= 51 fps=0.0 q=31.0 size= 256kB time=00:00:02.05
> bitrate=1018.9kbits/
> I see q=31.0. (the output file is only 5.9 MB)
> In the first view this seems to correspond to:
> 2 Codec Options
> qmax integer (encoding,video)
> Set max video quantizer scale (VBR). Must be included between -1
> and 1024, default value is 31.
> But this seems not to be the option to change, to have a better quality.
>
> 1. question -> Where in the documentation is stated, which quality is
> used by default and how to change it?
>
> When I use (with static release build 4.1.3 from johnvansickle):
> ffmpeg in.mp4 -c:a copy out.mp4
> in the output lines e.g.
> frame= 54 fps=0.0 q=28.0 size= 0kB time=00:00:02.20
> bitrate= 0.2kbits/
> I see q=28.0. (the output file is 16.3 MB)
>
> When using my system's standard version 3.4.6 I get the same q value, so
> this seems corresponding to 4.1.3.
> Also the visual quality of the output seems similar and has 16.4 MB.
> In the heading info (which is missing in the dev build) I also see crf=23.0
>
> 2. question -> How does crf correspond to q?
>
> When I use -q 28 (with build from dev):
> ./ffmpeg in.mp4 -q 28 -c:a copy out.mp4
> in the output lines e.g.
> frame= 70 fps=0.0 q=28.0 size= 0kB time=00:00:02.84
> bitrate= 0.1kbits/
> I also see q=28.0, but the output file has only 6.1 MB and really bad
> quality, similar to the default with q=31.0
>
> 3. question -> What is the reason for this big difference with the same
> q=28.0?
For the reference, here the complete outputs:
================================================
$ ./ffmpeg -i debug/CYD_1.5m_x264.mp4 -c:a copy debug/CYD_1.5m_x264_dev.mp4
ffmpeg version N-93873-g6276b4db97 Copyright (c) 2000-2019 the FFmpeg
developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04)
configuration:
libavutil 56. 28.100 / 56. 28.100
libavcodec 58. 52.101 / 58. 52.101
libavformat 58. 27.103 / 58. 27.103
libavdevice 58. 7.100 / 58. 7.100
libavfilter 7. 53.101 / 7. 53.101
libswscale 5. 4.101 / 5. 4.101
libswresample 3. 4.100 / 3. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'debug/CYD_1.5m_x264.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.20.100
Duration: 00:01:30.40, start: 0.000000, bitrate: 1729 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
704x576 [SAR 12:11 DAR 4:3], 1594 kb/s, 25 fps, 25 tbr, 12800 tbn, 50
tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
File 'debug/CYD_1.5m_x264_dev.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
Output #0, mp4, to 'debug/CYD_1.5m_x264_dev.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.27.103
Stream #0:0(und): Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 704x576
[SAR 12:11 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc58.52.101 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
frame= 99 fps=0.0 q=31.0 size= 256kB time=00:00:04.00 bitrate=
524.4kbits/frame= 212 fps=211 q=31.0 size= 512kB time=00:00:08.52
bitrate= 492.2kbits/frame= 324 fps=215 q=31.0 size= 768kB
time=00:00:13.00 bitrate= 483.9kbits/frame= 408 fps=203 q=31.0 size=
1024kB time=00:00:16.37 bitrate= 512.4kbits/frame= 490 fps=195 q=31.0
size= 1280kB time=00:00:19.65 bitrate= 533.4kbits/frame= 582 fps=193
q=31.0 size= 1536kB time=00:00:23.32 bitrate= 539.4kbits/frame= 658
fps=187 q=31.0 size= 1792kB time=00:00:26.36 bitrate=
556.8kbits/frame= 746 fps=186 q=31.0 size= 2048kB time=00:00:29.88
bitrate= 561.3kbits/frame= 830 fps=184 q=31.0 size= 2304kB
time=00:00:33.25 bitrate= 567.5kbits/frame= 933 fps=186 q=31.0 size=
2560kB time=00:00:37.37 bitrate= 561.1kbits/frame= 1025 fps=186 q=31.0
size= 2816kB time=00:00:41.04 bitrate= 562.0kbits/frame= 1120 fps=186
q=31.0 size= 3328kB time=00:00:44.84 bitrate= 608.0kbits/frame= 1217
fps=186 q=31.0 size= 3584kB time=00:00:48.73 bitrate=
602.4kbits/frame= 1325 fps=188 q=31.0 size= 3840kB time=00:00:53.04
bitrate= 593.0kbits/frame= 1419 fps=188 q=31.0 size= 3840kB
time=00:00:56.80 bitrate= 553.8kbits/frame= 1512 fps=188 q=31.0 size=
4096kB time=00:01:00.53 bitrate= 554.3kbits/frame= 1614 fps=189 q=31.0
size= 4352kB time=00:01:04.60 bitrate= 551.8kbits/frame= 1715 fps=190
q=31.0 size= 4608kB time=00:01:08.65 bitrate= 549.9kbits/frame= 1783
fps=187 q=31.0 size= 4864kB time=00:01:11.36 bitrate=
558.4kbits/frame= 1838 fps=183 q=24.8 size= 4864kB time=00:01:13.57
bitrate= 541.5kbits/frame= 1901 fps=180 q=31.0 size= 4864kB
time=00:01:16.09 bitrate= 523.6kbits/frame= 1974 fps=179 q=31.0 size=
5120kB time=00:01:19.01 bitrate= 530.8kbits/frame= 2080 fps=180 q=31.0
size= 5376kB time=00:01:23.24 bitrate= 529.1kbits/frame= 2181 fps=181
q=31.0 size= 5376kB time=00:01:27.29 bitrate= 504.5kbits/frame= 2260
fps=180 q=31.0 Lsize= 5806kB time=00:01:30.36 bitrate= 526.4kbits/s
speed=7.22x
video:4341kB audio:1413kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 0.920072%
================================================
$ ffmpeg -i debug/CYD_1.5m_x264.mp4 -c:a copy debug/CYD_1.5m_x264_4.1.mp4
ffmpeg version 4.1.3-static https://johnvansickle.com/ffmpeg/ Copyright
(c) 2000-2019 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
configuration: --enable-gpl --enable-version3 --enable-static
--disable-debug --disable-ffplay --disable-indev=sndio
--disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r
--enable-gnutls --enable-gmp --enable-gray --enable-libaom
--enable-libfribidi --enable-libass --enable-libvmaf
--enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband
--enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus
--enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc
--enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxml2 --enable-libxvid --enable-libzvbi --enable-libzimg
libavutil 56. 22.100 / 56. 22.100
libavcodec 58. 35.100 / 58. 35.100
libavformat 58. 20.100 / 58. 20.100
libavdevice 58. 5.100 / 58. 5.100
libavfilter 7. 40.101 / 7. 40.101
libswscale 5. 3.100 / 5. 3.100
libswresample 3. 3.100 / 3. 3.100
libpostproc 55. 3.100 / 55. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'debug/CYD_1.5m_x264.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.20.100
Duration: 00:01:30.40, start: 0.000000, bitrate: 1729 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
704x576 [SAR 12:11 DAR 4:3], 1594 kb/s, 25 fps, 25 tbr, 12800 tbn, 50
tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
File 'debug/CYD_1.5m_x264_4.1.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[libx264 @ 0x633c0c0] using SAR=12/11
[libx264 @ 0x633c0c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1
Cache64
[libx264 @ 0x633c0c0] profile Progressive High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x633c0c0] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC
codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html -
options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7
psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1
8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3
lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250
keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf
mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
aq=1:1.00
Output #0, mp4, to 'debug/CYD_1.5m_x264_4.1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.20.100
Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661),
yuv420p, 704x576 [SAR 12:11 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc
(default)
Metadata:
handler_name : VideoHandler
encoder : Lavc58.35.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
frame= 54 fps=0.0 q=28.0 size= 0kB time=00:00:02.20 bitrate=
0.2kbits/frame= 67 fps= 63 q=28.0 size= 0kB time=00:00:02.72
bitrate= 0.1kbits/frame= 79 fps= 49 q=28.0 size= 0kB
time=00:00:03.21 bitrate= 0.1kbits/frame= 88 fps= 41 q=28.0
size= 256kB time=00:00:03.57 bitrate= 587.0kbits/frame= 100 fps= 38
q=28.0 size= 256kB time=00:00:04.04 bitrate= 518.8kbits/frame= 112
fps= 35 q=28.0 size= 256kB time=00:00:04.53 bitrate=
462.7kbits/frame= 123 fps= 33 q=28.0 size= 512kB time=00:00:04.96
bitrate= 845.7kbits/frame= 135 fps= 32 q=28.0 size= 512kB
time=00:00:05.45 bitrate= 769.6kbits/frame= 149 fps= 31 q=28.0
size= 512kB time=00:00:06.01 bitrate= 697.3kbits/frame= 161 fps= 30
q=28.0 size= 768kB time=00:00:06.49 bitrate= 968.6kbits/frame= 175
fps= 30 q=28.0 size= 768kB time=00:00:07.05 bitrate=
892.4kbits/frame= 189 fps= 30 q=28.0 size= 768kB time=00:00:07.60
bitrate= 827.3kbits/frame= 202 fps= 29 q=28.0 size= 1024kB
time=00:00:08.13 bitrate=1030.8kbits/frame= 217 fps= 29 q=28.0 size=
1024kB time=00:00:08.73 bitrate= 960.3kbits/frame= 232 fps= 29 q=28.0
size= 1024kB time=00:00:09.33 bitrate= 898.8kbits/frame= 246 fps= 29
q=28.0 size= 1280kB time=00:00:09.88 bitrate=1060.5kbits/frame= 262
fps= 29 q=28.0 size= 1280kB time=00:00:10.52 bitrate=
996.0kbits/frame= 279 fps= 29 q=28.0 size= 1280kB time=00:00:11.21
bitrate= 935.4kbits/frame= 292 fps= 29 q=28.0 size= 1536kB
time=00:00:11.72 bitrate=1073.4kbits/frame= 307 fps= 29 q=28.0 size=
1536kB time=00:00:12.32 bitrate=1021.4kbits/frame= 322 fps= 29 q=28.0
size= 1536kB time=00:00:12.93 bitrate= 972.5kbits/frame= 336 fps= 29
q=28.0 size= 1536kB time=00:00:13.49 bitrate= 932.6kbits/frame= 349
fps= 29 q=28.0 size= 1792kB time=00:00:14.00
bitrate=1048.2kbits/frame= 361 fps= 29 q=28.0 size= 1792kB
time=00:00:14.49 bitrate=1012.7kbits/frame= 373 fps= 28 q=28.0 size=
2048kB time=00:00:14.96 bitrate=1121.1kbits/frame= 385 fps= 28 q=28.0
size= 2048kB time=00:00:15.45 bitrate=1085.5kbits/frame= 397 fps= 28
q=28.0 size= 2048kB time=00:00:15.92 bitrate=1053.5kbits/frame= 410
fps= 28 q=28.0 size= 2304kB time=00:00:16.45
bitrate=1146.8kbits/frame= 422 fps= 28 q=28.0 size= 2304kB
time=00:00:16.92 bitrate=1115.0kbits/frame= 434 fps= 27 q=28.0 size=
2560kB time=00:00:17.41 bitrate=1204.0kbits/frame= 445 fps= 27 q=28.0
size= 2560kB time=00:00:17.84 bitrate=1175.2kbits/frame= 457 fps= 27
q=28.0 size= 2560kB time=00:00:18.33 bitrate=1143.8kbits/frame= 470
fps= 27 q=28.0 size= 2816kB time=00:00:18.84
bitrate=1224.0kbits/frame= 483 fps= 27 q=28.0 size= 2816kB
time=00:00:19.36 bitrate=1191.6kbits/frame= 496 fps= 27 q=28.0 size=
2816kB time=00:00:19.89 bitrate=1159.6kbits/frame= 509 fps= 27 q=28.0
size= 3072kB time=00:00:20.40 bitrate=1233.3kbits/frame= 516 fps= 26
q=28.0 size= 3072kB time=00:00:20.68 bitrate=1216.8kbits/frame= 523
fps= 26 q=28.0 size= 3072kB time=00:00:20.96
bitrate=1200.7kbits/frame= 529 fps= 25 q=28.0 size= 3072kB
time=00:00:21.21 bitrate=1186.2kbits/frame= 535 fps= 25 q=28.0 size=
3072kB time=00:00:21.45 bitrate=1173.2kbits/frame= 546 fps= 25 q=28.0
size= 3328kB time=00:00:21.89 bitrate=1245.0kbits/frame= 559 fps= 25
q=28.0 size= 3328kB time=00:00:22.41 bitrate=1216.5kbits/frame= 571
fps= 25 q=28.0 size= 3328kB time=00:00:22.88
bitrate=1191.6kbits/frame= 585 fps= 25 q=28.0 size= 3584kB
time=00:00:23.44 bitrate=1252.3kbits/frame= 599 fps= 25 q=28.0 size=
3584kB time=00:00:24.01 bitrate=1222.8kbits/frame= 613 fps= 25 q=28.0
size= 3840kB time=00:00:24.57 bitrate=1280.0kbits/frame= 625 fps= 25
q=28.0 size= 3840kB time=00:00:25.04 bitrate=1256.0kbits/frame= 638
fps= 25 q=28.0 size= 3840kB time=00:00:25.57
bitrate=1229.8kbits/frame= 646 fps= 25 q=28.0 size= 4096kB
time=00:00:25.89 bitrate=1295.6kbits/frame= 657 fps= 25 q=28.0 size=
4096kB time=00:00:26.32 bitrate=1274.6kbits/frame= 671 fps= 25 q=28.0
size= 4352kB time=00:00:26.88 bitrate=1326.3kbits/frame= 685 fps= 25
q=28.0 size= 4352kB time=00:00:27.45 bitrate=1298.5kbits/frame= 694
fps= 25 q=28.0 size= 4352kB time=00:00:27.81
bitrate=1281.6kbits/frame= 706 fps= 25 q=28.0 size= 4608kB
time=00:00:28.28 bitrate=1334.5kbits/frame= 715 fps= 24 q=28.0 size=
4608kB time=00:00:28.65 bitrate=1317.6kbits/frame= 725 fps= 24 q=28.0
size= 4608kB time=00:00:29.05 bitrate=1299.2kbits/frame= 737 fps= 24
q=28.0 size= 4864kB time=00:00:29.52 bitrate=1349.6kbits/frame= 749
fps= 24 q=28.0 size= 4864kB time=00:00:30.01
bitrate=1327.5kbits/frame= 756 fps= 24 q=28.0 size= 4864kB
time=00:00:30.29 bitrate=1315.3kbits/frame= 764 fps= 24 q=28.0 size=
4864kB time=00:00:30.61 bitrate=1301.6kbits/frame= 771 fps= 24 q=28.0
size= 5120kB time=00:00:30.89 bitrate=1357.8kbits/frame= 779 fps= 24
q=28.0 size= 5120kB time=00:00:31.21 bitrate=1343.9kbits/frame= 789
fps= 24 q=28.0 size= 5120kB time=00:00:31.61
bitrate=1326.7kbits/frame= 800 fps= 24 q=28.0 size= 5376kB
time=00:00:32.04 bitrate=1374.4kbits/frame= 811 fps= 24 q=28.0 size=
5376kB time=00:00:32.49 bitrate=1355.5kbits/frame= 824 fps= 24 q=25.0
size= 5376kB time=00:00:33.00 bitrate=1334.5kbits/frame= 838 fps= 24
q=28.0 size= 5632kB time=00:00:33.57 bitrate=1374.0kbits/frame= 845
fps= 23 q=28.0 size= 5632kB time=00:00:33.85
bitrate=1362.8kbits/frame= 855 fps= 23 q=28.0 size= 5632kB
time=00:00:34.24 bitrate=1347.5kbits/frame= 863 fps= 23 q=28.0 size=
5632kB time=00:00:34.56 bitrate=1335.0kbits/frame= 870 fps= 23 q=28.0
size= 5888kB time=00:00:34.85 bitrate=1383.7kbits/frame= 877 fps= 23
q=28.0 size= 5888kB time=00:00:35.13 bitrate=1372.8kbits/frame= 886
fps= 23 q=28.0 size= 5888kB time=00:00:35.49
bitrate=1358.8kbits/frame= 891 fps= 23 q=28.0 size= 5888kB
time=00:00:35.69 bitrate=1351.5kbits/frame= 898 fps= 22 q=28.0 size=
6144kB time=00:00:35.96 bitrate=1399.4kbits/frame= 905 fps= 22 q=28.0
size= 6144kB time=00:00:36.24 bitrate=1388.6kbits/frame= 911 fps= 22
q=28.0 size= 6144kB time=00:00:36.48 bitrate=1379.7kbits/frame= 917
fps= 22 q=28.0 size= 6144kB time=00:00:36.73
bitrate=1370.1kbits/frame= 923 fps= 22 q=28.0 size= 6144kB
time=00:00:36.97 bitrate=1361.4kbits/frame= 934 fps= 22 q=28.0 size=
6400kB time=00:00:37.41 bitrate=1401.2kbits/frame= 943 fps= 22 q=28.0
size= 6400kB time=00:00:37.76 bitrate=1388.5kbits/frame= 952 fps= 22
q=28.0 size= 6400kB time=00:00:38.12 bitrate=1375.3kbits/frame= 960
fps= 22 q=28.0 size= 6400kB time=00:00:38.44
bitrate=1363.8kbits/frame= 969 fps= 22 q=28.0 size= 6656kB
time=00:00:38.80 bitrate=1405.1kbits/frame= 982 fps= 22 q=28.0 size=
6656kB time=00:00:39.33 bitrate=1386.1kbits/frame= 995 fps= 22 q=28.0
size= 6656kB time=00:00:39.85 bitrate=1368.3kbits/frame= 1008 fps= 22
q=28.0 size= 6912kB time=00:00:40.36 bitrate=1402.9kbits/frame= 1021
fps= 22 q=28.0 size= 6912kB time=00:00:40.89
bitrate=1384.6kbits/frame= 1034 fps= 22 q=28.0 size= 7168kB
time=00:00:41.40 bitrate=1418.1kbits/frame= 1048 fps= 22 q=28.0 size=
7168kB time=00:00:41.96 bitrate=1399.4kbits/frame= 1062 fps= 22 q=28.0
size= 7168kB time=00:00:42.53 bitrate=1380.4kbits/frame= 1073 fps= 22
q=28.0 size= 7424kB time=00:00:42.96 bitrate=1415.5kbits/frame= 1087
fps= 22 q=28.0 size= 7424kB time=00:00:43.52
bitrate=1397.5kbits/frame= 1101 fps= 22 q=28.0 size= 7680kB
time=00:00:44.09 bitrate=1426.8kbits/frame= 1115 fps= 22 q=28.0 size=
7680kB time=00:00:44.65 bitrate=1409.0kbits/frame= 1129 fps= 22 q=28.0
size= 7936kB time=00:00:45.21 bitrate=1437.8kbits/frame= 1142 fps= 22
q=28.0 size= 7936kB time=00:00:45.72 bitrate=1421.7kbits/frame= 1155
fps= 22 q=28.0 size= 8192kB time=00:00:46.24
bitrate=1451.3kbits/frame= 1169 fps= 22 q=28.0 size= 8192kB
time=00:00:46.81 bitrate=1433.5kbits/frame= 1181 fps= 22 q=28.0 size=
8192kB time=00:00:47.28 bitrate=1419.2kbits/frame= 1191 fps= 22 q=28.0
size= 8448kB time=00:00:47.69 bitrate=1451.2kbits/frame= 1201 fps= 22
q=28.0 size= 8448kB time=00:00:48.09 bitrate=1438.9kbits/frame= 1212
fps= 22 q=28.0 size= 8704kB time=00:00:48.52
bitrate=1469.5kbits/frame= 1222 fps= 22 q=28.0 size= 8704kB
time=00:00:48.92 bitrate=1457.3kbits/frame= 1232 fps= 22 q=28.0 size=
8704kB time=00:00:49.33 bitrate=1445.3kbits/frame= 1243 fps= 22 q=28.0
size= 8960kB time=00:00:49.76 bitrate=1475.1kbits/frame= 1256 fps= 22
q=28.0 size= 8960kB time=00:00:50.29 bitrate=1459.5kbits/frame= 1271
fps= 22 q=28.0 size= 9216kB time=00:00:50.89
bitrate=1483.5kbits/frame= 1283 fps= 22 q=28.0 size= 9216kB
time=00:00:51.36 bitrate=1470.0kbits/frame= 1297 fps= 22 q=28.0 size=
9216kB time=00:00:51.93 bitrate=1453.7kbits/frame= 1310 fps= 22 q=28.0
size= 9472kB time=00:00:52.44 bitrate=1479.5kbits/frame= 1320 fps= 22
q=28.0 size= 9472kB time=00:00:52.85 bitrate=1468.1kbits/frame= 1335
fps= 22 q=28.0 size= 9472kB time=00:00:53.45
bitrate=1451.7kbits/frame= 1347 fps= 22 q=28.0 size= 9728kB
time=00:00:53.92 bitrate=1478.0kbits/frame= 1361 fps= 22 q=28.0 size=
9728kB time=00:00:54.49 bitrate=1462.3kbits/frame= 1376 fps= 22 q=28.0
size= 9728kB time=00:00:55.09 bitrate=1446.5kbits/frame= 1391 fps= 22
q=28.0 size= 9984kB time=00:00:55.69 bitrate=1468.6kbits/frame= 1406
fps= 22 q=28.0 size= 9984kB time=00:00:56.28
bitrate=1453.1kbits/frame= 1420 fps= 22 q=28.0 size= 10240kB
time=00:00:56.84 bitrate=1475.8kbits/frame= 1436 fps= 22 q=28.0 size=
10240kB time=00:00:57.48 bitrate=1459.3kbits/frame= 1451 fps= 23 q=28.0
size= 10496kB time=00:00:58.09 bitrate=1480.2kbits/frame= 1466 fps= 23
q=28.0 size= 10496kB time=00:00:58.69 bitrate=1464.8kbits/frame= 1477
fps= 23 q=28.0 size= 10496kB time=00:00:59.12
bitrate=1454.3kbits/frame= 1490 fps= 23 q=28.0 size= 10752kB
time=00:00:59.65 bitrate=1476.4kbits/frame= 1504 fps= 23 q=28.0 size=
10752kB time=00:01:00.21 bitrate=1462.8kbits/frame= 1518 fps= 23 q=28.0
size= 11008kB time=00:01:00.76 bitrate=1484.0kbits/frame= 1532 fps= 23
q=28.0 size= 11008kB time=00:01:01.32 bitrate=1470.5kbits/frame= 1546
fps= 23 q=28.0 size= 11264kB time=00:01:01.89
bitrate=1490.7kbits/frame= 1560 fps= 23 q=28.0 size= 11264kB
time=00:01:02.45 bitrate=1477.5kbits/frame= 1574 fps= 23 q=28.0 size=
11264kB time=00:01:03.00 bitrate=1464.5kbits/frame= 1588 fps= 23 q=28.0
size= 11520kB time=00:01:03.56 bitrate=1484.7kbits/frame= 1602 fps= 23
q=28.0 size= 11520kB time=00:01:04.13 bitrate=1471.4kbits/frame= 1617
fps= 23 q=28.0 size= 11776kB time=00:01:04.73
bitrate=1490.2kbits/frame= 1630 fps= 23 q=28.0 size= 11776kB
time=00:01:05.24 bitrate=1478.5kbits/frame= 1645 fps= 23 q=28.0 size=
12032kB time=00:01:05.84 bitrate=1496.9kbits/frame= 1658 fps= 23 q=28.0
size= 12032kB time=00:01:06.37 bitrate=1484.9kbits/frame= 1671 fps= 23
q=28.0 size= 12032kB time=00:01:06.88 bitrate=1473.8kbits/frame= 1686
fps= 23 q=28.0 size= 12288kB time=00:01:07.49
bitrate=1491.3kbits/frame= 1700 fps= 23 q=28.0 size= 12288kB
time=00:01:08.05 bitrate=1479.2kbits/frame= 1714 fps= 23 q=28.0 size=
12544kB time=00:01:08.60 bitrate=1497.8kbits/frame= 1728 fps= 23 q=28.0
size= 12544kB time=00:01:09.16 bitrate=1485.8kbits/frame= 1740 fps= 23
q=28.0 size= 12800kB time=00:01:09.65 bitrate=1505.4kbits/frame= 1750
fps= 23 q=28.0 size= 12800kB time=00:01:10.05
bitrate=1496.7kbits/frame= 1758 fps= 23 q=28.0 size= 12800kB
time=00:01:10.37 bitrate=1489.9kbits/frame= 1768 fps= 23 q=28.0 size=
13056kB time=00:01:10.76 bitrate=1511.5kbits/frame= 1780 fps= 23 q=28.0
size= 13056kB time=00:01:11.25 bitrate=1501.1kbits/frame= 1795 fps= 23
q=28.0 size= 13312kB time=00:01:11.85 bitrate=1517.8kbits/frame= 1807
fps= 23 q=28.0 size= 13312kB time=00:01:12.32
bitrate=1507.9kbits/frame= 1820 fps= 23 q=28.0 size= 13312kB
time=00:01:12.85 bitrate=1496.9kbits/frame= 1833 fps= 23 q=28.0 size=
13568kB time=00:01:13.36 bitrate=1515.0kbits/frame= 1847 fps= 23 q=28.0
size= 13568kB time=00:01:13.92 bitrate=1503.6kbits/frame= 1860 fps= 23
q=28.0 size= 13824kB time=00:01:14.45 bitrate=1521.0kbits/frame= 1872
fps= 23 q=28.0 size= 13824kB time=00:01:14.92
bitrate=1511.5kbits/frame= 1886 fps= 23 q=28.0 size= 13824kB
time=00:01:15.49 bitrate=1500.0kbits/frame= 1900 fps= 23 q=28.0 size=
14080kB time=00:01:16.05 bitrate=1516.6kbits/frame= 1915 fps= 23 q=28.0
size= 14080kB time=00:01:16.65 bitrate=1504.8kbits/frame= 1928 fps= 23
q=28.0 size= 14336kB time=00:01:17.16 bitrate=1522.0kbits/frame= 1942
fps= 23 q=28.0 size= 14336kB time=00:01:17.73
bitrate=1510.7kbits/frame= 1958 fps= 23 q=28.0 size= 14336kB
time=00:01:18.37 bitrate=1498.4kbits/frame= 1974 fps= 23 q=28.0 size=
14592kB time=00:01:19.01 bitrate=1512.8kbits/frame= 1995 fps= 23 q=28.0
size= 14592kB time=00:01:19.85 bitrate=1497.0kbits/frame= 2015 fps= 23
q=28.0 size= 14592kB time=00:01:20.64 bitrate=1482.4kbits/frame= 2034
fps= 24 q=28.0 size= 14848kB time=00:01:21.40
bitrate=1494.1kbits/frame= 2053 fps= 24 q=28.0 size= 14848kB
time=00:01:22.17 bitrate=1480.2kbits/frame= 2071 fps= 24 q=28.0 size=
14848kB time=00:01:22.88 bitrate=1467.6kbits/frame= 2088 fps= 24 q=28.0
size= 14848kB time=00:01:23.56 bitrate=1455.6kbits/frame= 2100 fps= 24
q=28.0 size= 14848kB time=00:01:24.05 bitrate=1447.1kbits/frame= 2113
fps= 24 q=28.0 size= 14848kB time=00:01:24.56
bitrate=1438.4kbits/frame= 2129 fps= 24 q=28.0 size= 15104kB
time=00:01:25.20 bitrate=1452.2kbits/frame= 2145 fps= 24 q=28.0 size=
15104kB time=00:01:25.84 bitrate=1441.3kbits/frame= 2161 fps= 24 q=28.0
size= 15104kB time=00:01:26.48 bitrate=1430.7kbits/frame= 2169 fps= 24
q=28.0 size= 15104kB time=00:01:26.80 bitrate=1425.4kbits/frame= 2177
fps= 24 q=28.0 size= 15104kB time=00:01:27.12
bitrate=1420.2kbits/frame= 2186 fps= 24 q=28.0 size= 15104kB
time=00:01:27.48 bitrate=1414.3kbits/frame= 2195 fps= 24 q=28.0 size=
15360kB time=00:01:27.85 bitrate=1432.3kbits/frame= 2207 fps= 24 q=28.0
size= 15360kB time=00:01:28.32 bitrate=1424.7kbits/frame= 2225 fps= 24
q=28.0 size= 15360kB time=00:01:29.04 bitrate=1413.1kbits/frame= 2242
fps= 24 q=28.0 size= 15360kB time=00:01:29.73
bitrate=1402.2kbits/frame= 2253 fps= 24 q=28.0 size= 15360kB
time=00:01:29.99 bitrate=1398.2kbits/frame= 2260 fps= 23 q=-1.0 Lsize=
15916kB time=00:01:30.28 bitrate=1444.3kbits/s speed=0.937x
video:14434kB audio:1413kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 0.440433%
[libx264 @ 0x633c0c0] frame I:12 Avg QP:20.71 size: 38215
[libx264 @ 0x633c0c0] frame P:605 Avg QP:23.49 size: 13591
[libx264 @ 0x633c0c0] frame B:1643 Avg QP:27.30 size: 3712
[libx264 @ 0x633c0c0] consecutive B-frames: 1.0% 5.9% 1.1% 92.0%
[libx264 @ 0x633c0c0] mb I I16..4: 7.1% 84.3% 8.6%
[libx264 @ 0x633c0c0] mb P I16..4: 1.7% 7.7% 1.1% P16..4: 47.1%
21.1% 10.0% 0.0% 0.0% skip:11.3%
[libx264 @ 0x633c0c0] mb B I16..4: 0.1% 0.6% 0.1% B16..8: 50.5%
6.7% 1.2% direct: 2.3% skip:38.4% L0:43.4% L1:48.4% BI: 8.2%
[libx264 @ 0x633c0c0] 8x8 transform intra:74.8% inter:78.5%
[libx264 @ 0x633c0c0] coded y,uvDC,uvAC intra: 64.7% 55.6% 6.8% inter:
21.5% 14.0% 0.2%
[libx264 @ 0x633c0c0] i16 v,h,dc,p: 33% 36% 11% 20%
[libx264 @ 0x633c0c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 16% 22% 5%
6% 8% 7% 7% 7%
[libx264 @ 0x633c0c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 27% 16% 5%
8% 7% 8% 6% 6%
[libx264 @ 0x633c0c0] i8c dc,h,v,p: 56% 19% 19% 6%
[libx264 @ 0x633c0c0] Weighted P-Frames: Y:8.3% UV:1.5%
[libx264 @ 0x633c0c0] ref P L0: 50.6% 15.2% 24.8% 8.8% 0.6%
[libx264 @ 0x633c0c0] ref B L0: 86.2% 11.6% 2.2%
[libx264 @ 0x633c0c0] ref B L1: 96.4% 3.6%
[libx264 @ 0x633c0c0] kb/s:1307.93
================================================
$ ./ffmpeg -i debug/CYD_1.5m_x264.mp4 -q 28 -c:a copy
debug/CYD_1.5m_x264_dev_q28.mp4
ffmpeg version N-93873-g6276b4db97 Copyright (c) 2000-2019 the FFmpeg
developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04)
configuration:
libavutil 56. 28.100 / 56. 28.100
libavcodec 58. 52.101 / 58. 52.101
libavformat 58. 27.103 / 58. 27.103
libavdevice 58. 7.100 / 58. 7.100
libavfilter 7. 53.101 / 7. 53.101
libswscale 5. 4.101 / 5. 4.101
libswresample 3. 4.100 / 3. 4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'debug/CYD_1.5m_x264.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.20.100
Duration: 00:01:30.40, start: 0.000000, bitrate: 1729 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
704x576 [SAR 12:11 DAR 4:3], 1594 kb/s, 25 fps, 25 tbr, 12800 tbn, 50
tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
Output #0, mp4, to 'debug/CYD_1.5m_x264_dev_q28.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.27.103
Stream #0:0(und): Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 704x576
[SAR 12:11 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc58.52.101 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
frame= 70 fps=0.0 q=28.0 size= 0kB time=00:00:02.84 bitrate=
0.1kbits/frame= 179 fps=178 q=28.0 size= 512kB time=00:00:07.20
bitrate= 582.6kbits/frame= 301 fps=199 q=28.0 size= 768kB
time=00:00:12.08 bitrate= 520.6kbits/frame= 381 fps=189 q=28.0 size=
1024kB time=00:00:15.28 bitrate= 548.8kbits/frame= 471 fps=187 q=28.0
size= 1280kB time=00:00:18.89 bitrate= 555.1kbits/frame= 569 fps=188
q=28.0 size= 1536kB time=00:00:22.81 bitrate= 551.5kbits/frame= 662
fps=188 q=28.0 size= 1792kB time=00:00:26.53 bitrate=
553.2kbits/frame= 741 fps=184 q=28.0 size= 2048kB time=00:00:29.69
bitrate= 565.0kbits/frame= 828 fps=183 q=28.0 size= 2304kB
time=00:00:33.17 bitrate= 569.0kbits/frame= 925 fps=184 q=28.0 size=
2816kB time=00:00:37.05 bitrate= 622.5kbits/frame= 1010 fps=183 q=28.0
size= 3072kB time=00:00:40.44 bitrate= 622.2kbits/frame= 1101 fps=182
q=28.0 size= 3328kB time=00:00:44.09 bitrate= 618.3kbits/frame= 1197
fps=183 q=28.0 size= 3584kB time=00:00:47.92 bitrate=
612.6kbits/frame= 1300 fps=185 q=28.0 size= 3840kB time=00:00:52.04
bitrate= 604.5kbits/frame= 1407 fps=187 q=28.0 size= 4096kB
time=00:00:56.33 bitrate= 595.7kbits/frame= 1504 fps=187 q=28.0 size=
4096kB time=00:01:00.21 bitrate= 557.3kbits/frame= 1607 fps=188 q=28.0
size= 4352kB time=00:01:04.33 bitrate= 554.2kbits/frame= 1703 fps=188
q=28.0 size= 4608kB time=00:01:08.16 bitrate= 553.8kbits/frame= 1802
fps=188 q=28.0 size= 4864kB time=00:01:12.12 bitrate=
552.4kbits/frame= 1904 fps=189 q=28.0 size= 5120kB time=00:01:16.20
bitrate= 550.4kbits/frame= 2032 fps=192 q=28.0 size= 5376kB
time=00:01:21.32 bitrate= 541.6kbits/frame= 2125 fps=192 q=28.0 size=
5376kB time=00:01:25.05 bitrate= 517.8kbits/frame= 2236 fps=193 q=28.0
size= 5632kB time=00:01:29.49 bitrate= 515.5kbits/frame= 2260 fps=193
q=28.0 Lsize= 5939kB time=00:01:30.36 bitrate= 538.4kbits/s
speed=7.73x
video:4473kB audio:1413kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 0.899318%
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