[FFmpeg-user] Question about tmix filter
Paul B Mahol
onemda at gmail.com
Wed Mar 6 21:17:56 EET 2019
On 3/6/19, Michael Koch <astroelectronic at t-online.de> wrote:
> Am 06.03.2019 um 17:12 schrieb Paul B Mahol:
>> On 3/6/19, Michael Koch <astroelectronic at t-online.de> wrote:
>>> I'd like to know which frames does the tmix filter use for averaging.
>>> Let's assume tmix=frames=9.
>>> To make the n_th frame of the output video, does it use input frames n-8
>>> to n, or n-4 to n+4, or n to n+8?
>>> How does the filter behave at the beginning and end of the video, where
>>> not all required input frames exist?
>> Filter output first frame after frames=9 it got from input. At
>> encountering eof it simply ends.
>
> I did make this test with a 5 seconds @25fps input video with
> tmix=frames=50, so that the output should be 2 seconds shorter. But the
> output video has the same length as the input.
Your interpretation of test results is invalid.
You should count frames.
>
> F:\Meteore>c://ffmpeg/ffmpeg -i sternschnuppe167.mp4 -vf tmix=frames=50
> -q:v 1 -
> y test.mp4
> ffmpeg version N-93219-gc679119a73 Copyright (c) 2000-2019 the FFmpeg
> developers
>
> built with gcc 8.2.1 (GCC) 20190212
> configuration: --enable-gpl --enable-version3 --enable-sdl2
> --enable-fontconfi
> g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d
> --enable-libb
> luray --enable-libfreetype --enable-libmp3lame
> --enable-libopencore-amrnb --enab
> le-libopencore-amrwb --enable-libopenjpeg --enable-libopus
> --enable-libshine --e
> nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame
> --enable
> -libvpx --enable-libwavpack --enable-libwebp --enable-libx264
> --enable-libx265 -
> -enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
> --enable-gmp --enab
> le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
> --enable-libmysofa --en
> able-libspeex --enable-libxvid --enable-libaom --enable-libmfx
> --enable-amf --en
> able-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc
> --enable-nvdec --e
> nable-dxva2 --enable-avisynth --enable-libopenmpt
> libavutil 56. 26.100 / 56. 26.100
> libavcodec 58. 47.102 / 58. 47.102
> libavformat 58. 26.101 / 58. 26.101
> libavdevice 58. 6.101 / 58. 6.101
> libavfilter 7. 48.100 / 7. 48.100
> libswscale 5. 4.100 / 5. 4.100
> libswresample 3. 4.100 / 3. 4.100
> libpostproc 55. 4.100 / 55. 4.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sternschnuppe167.mp4':
> Metadata:
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf58.26.101
> Duration: 00:00:05.03, start: 0.000000, bitrate: 10351 kb/s
> Stream #0:0(und): Video: h264 (High 4:2:2) (avc1 / 0x31637661),
> yuv422p, 120
> 0x1200 [SAR 1:1 DAR 1:1], 10276 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc
> (default
> )
> Metadata:
> handler_name : VideoHandler
> Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
> stereo, flt
> p, 127 kb/s (default)
> Metadata:
> handler_name : SoundHandler
> Stream mapping:
> Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
> Stream #0:1 -> #0:1 (aac (native) -> aac (native))
> Press [q] to stop, [?] for help
> [libx264 @ 000000000304fa40] -qscale is ignored, -crf is recommended.
> [libx264 @ 000000000304fa40] using SAR=1/1
> [libx264 @ 000000000304fa40] using cpu capabilities: MMX2 SSE2Fast SSSE3
> SSE4.2
> AVX FMA3 BMI2 AVX2
> [libx264 @ 000000000304fa40] profile High 4:2:2, level 4.0, 4:2:2, 8-bit
> [libx264 @ 000000000304fa40] 264 - core 157 r2935 545de2f - H.264/MPEG-4
> AVC cod
> ec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options:
> cabac=1 r
> ef=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_pski
> p=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0
> nr=0 deci
> mate=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=2
> 5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0
> qcomp=0.6
> 0 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
> Output #0, mp4, to 'test.mp4':
> Metadata:
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf58.26.101
> Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661),
> yuv422p, 1200x1
> 200 [SAR 1:1 DAR 1:1], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
> Metadata:
> handler_name : VideoHandler
> encoder : Lavc58.47.102 libx264
> Side data:
> cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
> Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
> stereo, flt
> p, 128 kb/s (default)
> Metadata:
> handler_name : SoundHandler
> encoder : Lavc58.47.102 aac
> frame= 1 fps=0.0 q=0.0 size= 0kB time=00:00:02.11 bitrate=
> 0.2kbits/s
> frame= 3 fps=2.2 q=0.0 size= 0kB time=00:00:02.19 bitrate=
> 0.2kbits/s
> frame= 5 fps=2.5 q=0.0 size= 0kB time=00:00:02.26 bitrate=
> 0.2kbits/s
> frame= 7 fps=2.6 q=0.0 size= 0kB time=00:00:02.34 bitrate=
> 0.2kbits/s
> frame= 9 fps=2.8 q=0.0 size= 0kB time=00:00:02.43 bitrate=
> 0.2kbits/s
> frame= 11 fps=2.8 q=0.0 size= 0kB time=00:00:02.51 bitrate=
> 0.2kbits/s
> frame= 13 fps=2.9 q=0.0 size= 0kB time=00:00:02.58 bitrate=
> 0.1kbits/s
> frame= 15 fps=2.9 q=0.0 size= 0kB time=00:00:02.66 bitrate=
> 0.1kbits/s
> frame= 17 fps=2.9 q=0.0 size= 0kB time=00:00:02.75 bitrate=
> 0.1kbits/s
> frame= 19 fps=3.0 q=0.0 size= 0kB time=00:00:02.83 bitrate=
> 0.1kbits/s
> frame= 21 fps=3.0 q=0.0 size= 0kB time=00:00:02.90 bitrate=
> 0.1kbits/s
> frame= 23 fps=3.0 q=0.0 size= 0kB time=00:00:02.98 bitrate=
> 0.1kbits/s
> frame= 25 fps=3.0 q=0.0 size= 0kB time=00:00:03.07 bitrate=
> 0.1kbits/s
> frame= 27 fps=3.0 q=0.0 size= 0kB time=00:00:03.15 bitrate=
> 0.1kbits/s
> frame= 29 fps=3.0 q=0.0 size= 0kB time=00:00:03.22 bitrate=
> 0.1kbits/s
> frame= 31 fps=3.0 q=0.0 size= 0kB time=00:00:03.30 bitrate=
> 0.1kbits/s
> frame= 33 fps=3.1 q=0.0 size= 0kB time=00:00:03.39 bitrate=
> 0.1kbits/s
> frame= 35 fps=3.1 q=0.0 size= 0kB time=00:00:03.47 bitrate=
> 0.1kbits/s
> frame= 37 fps=3.1 q=0.0 size= 0kB time=00:00:03.54 bitrate=
> 0.1kbits/s
> frame= 39 fps=3.1 q=0.0 size= 0kB time=00:00:03.62 bitrate=
> 0.1kbits/s
> frame= 41 fps=3.1 q=0.0 size= 0kB time=00:00:03.71 bitrate=
> 0.1kbits/s
> frame= 43 fps=3.1 q=0.0 size= 0kB time=00:00:03.79 bitrate=
> 0.1kbits/s
> frame= 45 fps=3.1 q=0.0 size= 0kB time=00:00:03.86 bitrate=
> 0.1kbits/s
> frame= 47 fps=3.1 q=0.0 size= 0kB time=00:00:03.94 bitrate=
> 0.1kbits/s
> frame= 49 fps=3.1 q=0.0 size= 0kB time=00:00:04.03 bitrate=
> 0.1kbits/s
> frame= 51 fps=3.1 q=28.0 size= 0kB time=00:00:04.11 bitrate=
> 0.1kbits/
> frame= 53 fps=3.1 q=28.0 size= 0kB time=00:00:04.18 bitrate=
> 0.1kbits/
> frame= 55 fps=3.1 q=28.0 size= 256kB time=00:00:04.26 bitrate=
> 491.6kbits/
> frame= 57 fps=3.1 q=28.0 size= 256kB time=00:00:04.35 bitrate=
> 482.0kbits/
> frame= 59 fps=3.1 q=28.0 size= 256kB time=00:00:04.43 bitrate=
> 472.7kbits/
> frame= 61 fps=3.1 q=28.0 size= 256kB time=00:00:04.50 bitrate=
> 466.0kbits/
> frame= 63 fps=3.1 q=28.0 size= 256kB time=00:00:04.58 bitrate=
> 457.3kbits/
> frame= 65 fps=3.1 q=28.0 size= 256kB time=00:00:04.67 bitrate=
> 449.0kbits/
> frame= 67 fps=3.1 q=28.0 size= 256kB time=00:00:04.75 bitrate=
> 440.9kbits/
> frame= 69 fps=3.1 q=28.0 size= 256kB time=00:00:04.82 bitrate=
> 435.1kbits/
> frame= 72 fps=3.1 q=28.0 size= 256kB time=00:00:04.97 bitrate=
> 422.0kbits/
> frame= 74 fps=3.1 q=28.0 size= 256kB time=00:00:04.97 bitrate=
> 422.0kbits/
> frame= 76 fps=3.1 q=28.0 size= 256kB time=00:00:04.97 bitrate=
> 422.0kbits/
> frame= 76 fps=3.0 q=-1.0 Lsize= 872kB time=00:00:05.01
> bitrate=1424.2kbits
> /s speed=0.198x
> video:790kB audio:78kB subtitle:0kB other streams:0kB global headers:0kB
> muxing
> overhead: 0.393023%
> [libx264 @ 000000000304fa40] frame I:1 Avg QP:19.44 size:259014
> [libx264 @ 000000000304fa40] frame P:75 Avg QP:19.56 size: 7319
> [libx264 @ 000000000304fa40] mb I I16..4: 12.4% 69.2% 18.4%
> [libx264 @ 000000000304fa40] mb P I16..4: 0.0% 0.0% 0.0% P16..4:
> 19.5% 0.3
> % 1.6% 0.0% 0.0% skip:78.5%
> [libx264 @ 000000000304fa40] 8x8 transform intra:69.2% inter:62.8%
> [libx264 @ 000000000304fa40] coded y,uvDC,uvAC intra: 89.1% 0.0% 0.0%
> inter: 9.9
> % 0.0% 0.0%
> [libx264 @ 000000000304fa40] i16 v,h,dc,p: 33% 4% 56% 7%
> [libx264 @ 000000000304fa40] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 8% 12% 40%
> 6% 6%
> 6% 6% 7% 8%
> [libx264 @ 000000000304fa40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 9% 10% 24%
> 11% 10%
> 9% 9% 9% 10%
> [libx264 @ 000000000304fa40] i8c dc,h,v,p: 100% 0% 0% 0%
> [libx264 @ 000000000304fa40] Weighted P-Frames: Y:0.0% UV:0.0%
> [libx264 @ 000000000304fa40] ref P L0: 97.8% 1.4% 0.8% 0.0%
> [libx264 @ 000000000304fa40] kb/s:2126.23
> [aac @ 0000000003282780] Qavg: 176.570
>
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