I am trying to perform a complex filter to merge two videos one after the
other. The output video appears to have black frames in it where the input
videos do not (at the end of the first and second video). The FFmpeg command
and output is:
ffmpeg -y -i input1.mp4 -i input2.mp4 -f lavfi -i
color=black:s=1920x1080:d=6.0 -filter_complex
"[1:v]setpts=expr=PTS-STARTPTS+3.0/TB[v1];
[2:v][0:v]overlay=eof_action=pass[over1];
[over1][v1]overlay=eof_action=pass[over2]" -vcodec libx264 -map [over2]
output.mp4
ffmpeg version 3.4.1 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 6.2.1 (Alpine 6.2.1) 20160822
configuration: --disable-debug --disable-doc --disable-ffplay
--enable-shared --enable-avresample --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-gpl --enable-libass --enable-libfreetype
--enable-libvidstab --enable-libmp3lame --enable-libopenjpeg
--enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx
--enable-libx265 --enable-libxvid --enable-libx264 --enable-nonfree
--enable-openssl --enable-libfdk_aac --enable-postproc --enable-small
--enable-version3 --extra-cflags=-I/opt/ffmpeg/include
--extra-ldflags=-L/opt/ffmpeg/lib --extra-libs=-ldl --prefix=/opt/ffmpeg
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libavresample 3. 7. 0 / 3. 7. 0
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.61.100
Duration: 00:00:03.09, start: 0.000000, bitrate: 302 kb/s
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], 269 kb/s, 2 fps, 2 tbr, 16384 tbn, 4 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo,
fltp, 35 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'input2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.61.100
Duration: 00:00:03.09, start: 0.000000, bitrate: 466 kb/s
Stream #1:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], 438 kb/s, 2 fps, 2 tbr, 16384 tbn, 4 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #1:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo,
fltp, 35 kb/s (default)
Metadata:
handler_name : SoundHandler
Input #2, lavfi, from 'color=black:s=1920x1080:d=6.0':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #2:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1920x1080
[SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 (h264) -> overlay:overlay
Stream #1:0 (h264) -> setpts
Stream #2:0 (rawvideo) -> overlay:main
overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x55e7ab444da0] using SAR=1/1
[libx264 @ 0x55e7ab444da0] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
[libx264 @ 0x55e7ab444da0] profile High, level 4.0
[libx264 @ 0x55e7ab444da0] 264 - core 148 - H.264/MPEG-4 AVC codec -
Copyleft 2003-2016 - 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=12 lookahead_threads=2
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 'output.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.83.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p,
1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
encoder : Lavc57.107.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
[Parsed_color_0 @ 0x55e7ab540820] EOF timestamp not reliablebitrate=
708.6kbits/s speed=1.46x
frame= 150 fps= 60 q=-1.0 Lsize= 410kB time=00:00:05.88 bitrate=
571.0kbits/s speed=2.35x
video:407kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.637398%
[libx264 @ 0x55e7ab444da0] frame I:2 Avg QP:13.72 size:190245
[libx264 @ 0x55e7ab444da0] frame P:38 Avg QP:15.10 size: 572
[libx264 @ 0x55e7ab444da0] frame B:110 Avg QP:14.82 size: 128
[libx264 @ 0x55e7ab444da0] consecutive B-frames: 1.3% 2.7% 0.0% 96.0%
[libx264 @ 0x55e7ab444da0] mb I I16..4: 21.7% 44.7% 33.5%
[libx264 @ 0x55e7ab444da0] mb P I16..4: 0.0% 0.0% 0.0% P16..4: 1.7%
0.1% 0.2% 0.0% 0.0% skip:97.9%
[libx264 @ 0x55e7ab444da0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.9%
0.0% 0.0% direct: 0.0% skip:99.1% L0:21.8% L1:78.2% BI: 0.0%
[libx264 @ 0x55e7ab444da0] 8x8 transform intra:44.6% inter:67.8%
[libx264 @ 0x55e7ab444da0] coded y,uvDC,uvAC intra: 66.7% 53.0% 31.6% inter:
0.1% 0.3% 0.0%
[libx264 @ 0x55e7ab444da0] i16 v,h,dc,p: 36% 10% 29% 25%
[libx264 @ 0x55e7ab444da0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 11% 40% 3%
2% 3% 2% 7% 5%
[libx264 @ 0x55e7ab444da0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 14% 15% 7%
5% 6% 4% 13% 6%
[libx264 @ 0x55e7ab444da0] i8c dc,h,v,p: 57% 19% 17% 8%
[libx264 @ 0x55e7ab444da0] Weighted P-Frames: Y:5.3% UV:5.3%
[libx264 @ 0x55e7ab444da0] ref P L0: 93.0% 0.8% 5.4% 0.8%
[libx264 @ 0x55e7ab444da0] ref B L0: 57.8% 42.1% 0.1%
[libx264 @ 0x55e7ab444da0] ref B L1: 93.5% 6.5%
[libx264 @ 0x55e7ab444da0] kb/s:555.11
I understand there are easier ways to concatenate two videos, but this is a
simplification of a more complicated command.
The two input files are here:
input1.mp4 <http://www.ffmpeg-archive.org/file/t377720/input1.mp4>
input2.mp4 <http://www.ffmpeg-archive.org/file/t377720/input2.mp4>
I made the input files using Android MediaCodec, so I suspect there may be
some issue with the timings of frames or something. FFmpeg does not output
any warnings though. Can anyone help me find out why these black frames are
appearing?
--
Sent from: http://www.ffmpeg-archive.org/
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