#10102: lavfi color background with clear png creating extra frames
-------------------------------------+-------------------------------------
Reporter: seankennett | Type: defect
Status: new | Priority: normal
Component: ffmpeg | Version: git-
Keywords: overlay | master
image2 filter_complex | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
I have 64 png images with transparent backgrounds which I want to overlay
onto a plain black background. The issue I have is that additional black
frames are added to the end of the video. Some of the images are
completely transparent which seem to be the cause of the issue. Replacing
these fully transparent images with partially transparent images works as
expected. With fully transparent the length of video is 5.333 seconds,
without is the expected length of 2.667.
ffmpeg -framerate 24 -i %d.png -f lavfi -i
color=0x000000@1:s=1920x1080:r=24 -filter_complex
"[1:v]trim=end_frame=64[b0];[b0][0:v]overlay" Recreate24.mp4
using latest master build:
ffmpeg version 2022-12-11-git-c3e20f78b0-essentials_build-www.gyan.dev
stack:
ffmpeg -framerate 24 -i %d.png -f lavfi -i
color=0x000000@1:s=1920x1080:r=24 -filter_complex
"[1:v]trim=end_frame=64[b0];[b0][0:v]overlay" Recreate24.mp4
ffmpeg version 2022-12-11-git-c3e20f78b0-essentials_build-www.gyan.dev
Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static --disable-
w32threads --disable-autodetect --enable-fontconfig --enable-iconv
--enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
--enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-
avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx
--enable-mediafoundation --enable-libass --enable-libfreetype --enable-
libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-
amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec
--enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-
libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame
--enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-
libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis
--enable-librubberband
libavutil 57. 43.100 / 57. 43.100
libavcodec 59. 55.100 / 59. 55.100
libavformat 59. 34.102 / 59. 34.102
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 52.100 / 8. 52.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
libpostproc 56. 7.100 / 56. 7.100
Input #0, image2, from '%d.png':
Duration: 00:00:02.67, start: 0.000000, bitrate: N/A
Stream #0:0: Video: png, monob(pc), 1920x1080, 24 fps, 24 tbr, 24 tbn
Input #1, lavfi, from 'color=0x000000@1:s=1920x1080:r=24':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #1:0: Video: wrapped_avframe, yuv420p, 1920x1080 [SAR 1:1 DAR
16:9], 24 fps, 24 tbr, 24 tbn
File 'Recreate24.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
Stream #0:0 (png) -> overlay
Stream #1:0 (wrapped_avframe) -> trim:default
overlay:default -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[image2 @ 0000025ca857dcc0] Thread message queue blocking; consider
raising the thread_queue_size option (current value: 8)
[libx264 @ 0000025ca8bbadc0] using SAR=1/1
[libx264 @ 0000025ca8bbadc0] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2
[libx264 @ 0000025ca8bbadc0] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0000025ca8bbadc0] 264 - core 164 r3102 416e3eb - H.264/MPEG-4
AVC codec - Copyleft 2003-2022 - 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=9
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=24
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 'Recreate24.mp4':
Metadata:
encoder : Lavf59.34.102
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(progressive),
1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 24 fps, 12288 tbn
Metadata:
encoder : Lavc59.55.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 128 fps= 65 q=-1.0 Lsize= 189kB time=00:00:05.20 bitrate=
296.5kbits/s dup=4 drop=0 speed=2.63x
video:186kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 1.242933%
[libx264 @ 0000025ca8bbadc0] frame I:2 Avg QP: 6.14 size: 3302
[libx264 @ 0000025ca8bbadc0] frame P:34 Avg QP:16.27 size: 2692
[libx264 @ 0000025ca8bbadc0] frame B:92 Avg QP:17.66 size: 999
[libx264 @ 0000025ca8bbadc0] consecutive B-frames: 1.6% 3.1% 14.1% 81.2%
[libx264 @ 0000025ca8bbadc0] mb I I16..4: 78.7% 20.5% 0.8%
[libx264 @ 0000025ca8bbadc0] mb P I16..4: 0.1% 0.5% 0.5% P16..4:
0.6% 0.4% 0.2% 0.0% 0.0% skip:97.8%
[libx264 @ 0000025ca8bbadc0] mb B I16..4: 0.0% 0.0% 0.1% B16..8:
1.1% 0.3% 0.1% direct: 0.1% skip:98.3% L0:52.8% L1:44.2% BI: 3.0%
[libx264 @ 0000025ca8bbadc0] 8x8 transform intra:24.5% inter:16.0%
[libx264 @ 0000025ca8bbadc0] coded y,uvDC,uvAC intra: 6.6% 10.0% 9.6%
inter: 0.3% 0.3% 0.2%
[libx264 @ 0000025ca8bbadc0] i16 v,h,dc,p: 97% 1% 2% 0%
[libx264 @ 0000025ca8bbadc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 59% 3% 36%
0% 0% 0% 0% 0% 1%
[libx264 @ 0000025ca8bbadc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 20% 31%
4% 7% 6% 6% 3% 4%
[libx264 @ 0000025ca8bbadc0] i8c dc,h,v,p: 93% 3% 3% 0%
[libx264 @ 0000025ca8bbadc0] Weighted P-Frames: Y:8.8% UV:5.9%
[libx264 @ 0000025ca8bbadc0] ref P L0: 51.1% 6.3% 17.3% 25.3%
[libx264 @ 0000025ca8bbadc0] ref B L0: 77.5% 19.2% 3.3%
[libx264 @ 0000025ca8bbadc0] ref B L1: 94.0% 6.0%
[libx264 @ 0000025ca8bbadc0] kb/s:284.98
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10102>
FFmpeg <https://ffmpeg.org>
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