[FFmpeg-user] Artifacts with mp4-Video

Tue Feb 16 23:01:33 EET 2021

Hi,

I have created a mp4 video with:

$ ffmpeg -i Kiosk\ Mozartstr.\ -\ Andreas.mpg Kiosk\ Mozartstr.\ -\ Andreas.mp4
ffmpeg version 4.3.1-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2020 the FFmpeg developers
   built with gcc 8 (Debian 8.3.0-6)
   configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --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-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
   libavutil      56. 51.100 / 56. 51.100
   libavcodec     58. 91.100 / 58. 91.100
   libavformat    58. 45.100 / 58. 45.100
   libavdevice    58. 10.100 / 58. 10.100
   libavfilter     7. 85.100 /  7. 85.100
   libswscale      5.  7.100 /  5.  7.100
   libswresample   3.  7.100 /  3.  7.100
   libpostproc    55.  7.100 / 55.  7.100
Input #0, mpeg, from 'Kiosk Mozartstr. - Andreas.mpg':
   Duration: 00:26:00.49, start: 0.529989, bitrate: 1793 kb/s
     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, progressive), 352x288 [SAR 12:11 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
     Side data:
       cpb: bitrate max/min/avg: 9578800/0/0 buffer size: 1835008 vbv_delay: N/A
     Stream #0:1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16p, 384 kb/s
Stream mapping:
   Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))
   Stream #0:1 -> #0:1 (mp2 (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x6836ac0] using SAR=12/11
[libx264 @ 0x6836ac0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.1 Cache64
[libx264 @ 0x6836ac0] profile High, level 1.3, 4:2:0, 8-bit
[libx264 @ 0x6836ac0] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - 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 'Kiosk Mozartstr. - Andreas.mp4':
   Metadata:
     encoder         : Lavf58.45.100
     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 352x288 [SAR 12:11 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc
     Metadata:
       encoder         : Lavc58.91.100 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
     Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
     Metadata:
       encoder         : Lavc58.91.100 aac
frame=39012 fps= 59 q=-1.0 Lsize=  152547kB time=00:26:00.36 bitrate= 800.9kbits/s speed=2.34x
video:126928kB audio:24474kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.756065%
[libx264 @ 0x6836ac0] frame I:303   Avg QP:22.95  size: 18951
[libx264 @ 0x6836ac0] frame P:10864 Avg QP:25.32  size:  7268
[libx264 @ 0x6836ac0] frame B:27845 Avg QP:28.91  size:  1626
[libx264 @ 0x6836ac0] consecutive B-frames:  1.9%  3.2% 16.8% 78.1%
[libx264 @ 0x6836ac0] mb I  I16..4:  2.3% 87.0% 10.7%
[libx264 @ 0x6836ac0] mb P  I16..4:  0.5%  8.9%  1.0%  P16..4: 41.9% 28.0% 18.0%  0.0%  0.0%    skip: 1.7%
[libx264 @ 0x6836ac0] mb B  I16..4:  0.1%  1.0%  0.1%  B16..8: 48.1%  7.8%  2.1%  direct: 7.6%  skip:33.4%  L0:36.1% L1:39.8% BI:24.1%
[libx264 @ 0x6836ac0] 8x8 transform intra:86.3% inter:80.9%
[libx264 @ 0x6836ac0] coded y,uvDC,uvAC intra: 87.5% 88.2% 46.9% inter: 32.6% 47.2% 4.6%
[libx264 @ 0x6836ac0] i16 v,h,dc,p: 26% 32% 12% 30%
[libx264 @ 0x6836ac0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 19% 26% 5%  6%  6%  6%  6%  8%
[libx264 @ 0x6836ac0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 20% 13% 6%  8%  8%  9%  7%  8%
[libx264 @ 0x6836ac0] i8c dc,h,v,p: 56% 19% 17%  8%
[libx264 @ 0x6836ac0] Weighted P-Frames: Y:4.4% UV:1.8%
[libx264 @ 0x6836ac0] ref P L0: 44.6% 15.3% 31.0%  8.8%  0.3%
[libx264 @ 0x6836ac0] ref B L0: 84.6% 13.4%  2.0%
[libx264 @ 0x6836ac0] ref B L1: 96.0%  4.0%
[libx264 @ 0x6836ac0] kb/s:666.33
[aac @ 0x6839580] Qavg: 231.969

Playing this video with VLC video player shows artifacts, see attached screen shot.

I'm wondering about this, because I never had such effect the last years.

So please can you have a look to the video, if there is something special with it? :
http://www.jugkoeln.de/Videos/Kiosk%20Mozartstr.%20-%20Andreas.mp4

Thanks
-Ulf

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