On 3/6/19, Michael Koch <[email protected]> wrote: > Am 06.03.2019 um 17:12 schrieb Paul B Mahol: >> On 3/6/19, Michael Koch <[email protected]> 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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