Using -ss <seconds> in fornt of inputfile, apply format filter and overlay
output is strange?
Creat rgbtestsrc video.
ffmpeg -f lavfi -i rgbtestsrc=d=10 -vcodec utvideo rgbtestsrc.avi
Overlay z output file is not change format before -ss input file.
This is OK.
ffmpeg -i rgbtestsrc.avi -ss 1 -vf
split[x][z];[x]format=gray[x1];[x1][z]overlay -vcodec libx264 1.mkv
ffmpeg version N-73541-g944a1aa Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 4.9.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b
--enable-libcaca --
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm
--enable-l
ibilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
--enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp
--en
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora
--ena
ble-libtwolame --enable-libvidstab --enable-libvo-aacenc
--enable-libvo-amrwbenc
--enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
--enabl
e-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma
--ena
ble-decklink --enable-zlib
libavutil 54. 28.100 / 54. 28.100
libavcodec 56. 47.100 / 56. 47.100
libavformat 56. 40.100 / 56. 40.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 21.100 / 5. 21.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.100 / 1. 2.100
libpostproc 53. 3.100 / 53. 3.100
Duration: 00:00:10.00, start: 0.000000, bitrate: 10462 kb/s
Stream #0:0: Video: utvideo (ULRA / 0x41524C55), rgba, 320x240, 10494
kb/s,
SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 25 tbn, 25 tbc
[libx264 @ 04554240] using SAR=1/1
[libx264 @ 04554240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 04554240] profile High, level 1.3
[libx264 @ 04554240] 264 - core 146 r2538 121396c - H.264/MPEG-4 AVC codec -
Cop
yleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
deb
lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
mixed_ref=1 m
e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1
chro
ma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0
decimate=1 i
nterlaced=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
scenec
ut=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, matroska, to '4.mkv':
Metadata:
encoder : Lavf56.40.100
Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv420p, 320x240
[SA
R 1:1 DAR 4:3], q=-1--1, 25 fps, 1k tbn, 25 tbc
Metadata:
encoder : Lavc56.47.100 libx264
Stream mapping:
Stream #0:0 -> #0:0 (utvideo (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 225 fps=0.0 q=-1.0 Lsize= 7kB time=00:00:08.92 bitrate=
6.5kbits
/s
video:5kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
ove
rhead: 39.354343%
[libx264 @ 04554240] frame I:1 Avg QP:17.18 size: 785
[libx264 @ 04554240] frame P:56 Avg QP:18.15 size: 27
[libx264 @ 04554240] frame B:168 Avg QP:22.33 size: 13
[libx264 @ 04554240] consecutive B-frames: 0.4% 0.0% 0.0% 99.6%
[libx264 @ 04554240] mb I I16..4: 42.3% 57.7% 0.0%
[libx264 @ 04554240] mb P I16..4: 0.1% 0.0% 0.0% P16..4: 0.6% 0.4%
0.0%
0.0% 0.0% skip:98.8%
[libx264 @ 04554240] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.2% 0.0%
0.0%
direct: 0.0% skip:99.8% L0:17.8% L1:82.2% BI: 0.0%
[libx264 @ 04554240] 8x8 transform intra:53.8% inter:100.0%
[libx264 @ 04554240] coded y,uvDC,uvAC intra: 6.9% 30.4% 26.1% inter: 0.0%
0.1%
0.0%
[libx264 @ 04554240] i16 v,h,dc,p: 68% 18% 3% 11%
[libx264 @ 04554240] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 88% 0% 8% 0% 0% 0%
0%
0% 3%
[libx264 @ 04554240] i8c dc,h,v,p: 7% 14% 77% 3%
[libx264 @ 04554240] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 04554240] ref P L0: 91.8% 0.0% 7.6% 0.6%
[libx264 @ 04554240] kb/s:4.01
Using -ss in front of input file, and overlay z input. z is not changed
format, but output file is changed format.
ffmpeg -ss 1 -i rgbtestsrc.avi -vf
split[x][z];[x]format=gray[x1];[x1][z]overlay -vcodec libx264 2.mkv
Output is gray format. This is OK.
ffmpeg -i rgbtestsrc.avi -ss 1 -vf
split[x][z];[x]format=gray[x1];[z][x1]overlay -vcodec libx264 3.mkv
Output is gray format. This is OK.
ffmpeg -ss 1 -i rgbtestsrc.avi -vf
split[x][z];[x]format=gray[x1];[z][x1]overlay -vcodec libx264 4.mkv
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