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FFmpeg is adding black borders to overlay PNG.

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Mikołaj Henklewski

FFmpeg is adding black borders to overlay PNG.

Hi,

I have a few PNG files that I want to add to video, but on final video some
of them have black borders (they do not have it originally). Question is
why ffmpeg is adding it?
my ffmpeg command is:

ffmpeg -i 3d9678e2e58c4d08a24363468d0cfd3e.mp4 -i caption-1616544596077.png
-i caption-1616544596080.png -i caption-1616544597262.png -i
caption-1616544598027.png -filter_complex
"[1:v]format=rgba,colorchannelmixer=aa=1[1_alpha];
[1_alpha]setpts=1.0*PTS[1_alpha_speed];
[1_alpha_speed]rotate=6.178465552059927:c=none:ow=rotw(6.178465552059927):oh=roth(6.178465552059927)[1_alpha_speed_rot];
[1_alpha_speed_rot]scale=iw/2:ih/2[1_alpha_speed_rot_scale];
[0:v][1_alpha_speed_rot_scale]overlay=x=288:y=50:enable='between(t,0,3.2)':format=rgb[1_out];
[2:v]format=rgba,colorchannelmixer=aa=1[2_alpha];
[2_alpha]setpts=1.0*PTS[2_alpha_speed];
[2_alpha_speed]rotate=0.0:c=none:ow=rotw(0.0):oh=roth(0.0)[2_alpha_speed_rot];
[2_alpha_speed_rot]scale=iw/2:ih/2[2_alpha_speed_rot_scale];
[1_out][2_alpha_speed_rot_scale]overlay=x=589:y=71:enable='between(t,0,3.2)':format=rgb[2_out];
[3:v]format=rgba,colorchannelmixer=aa=1[3_alpha];
[3_alpha]setpts=1.0*PTS[3_alpha_speed];
[3_alpha_speed]rotate=6.178465552059927:c=none:ow=rotw(6.178465552059927):oh=roth(6.178465552059927)[3_alpha_speed_rot];
[3_alpha_speed_rot]scale=iw/2:ih/2[3_alpha_speed_rot_scale];
[2_out][3_alpha_speed_rot_scale]overlay=x=409:y=104:enable='between(t,0,3.2)':format=rgb[3_out];
[4:v]format=rgba,colorchannelmixer=aa=1[4_alpha];
[4_alpha]setpts=1.0*PTS[4_alpha_speed];
[4_alpha_speed]rotate=0.0:c=none:ow=rotw(0.0):oh=roth(0.0)[4_alpha_speed_rot];
[4_alpha_speed_rot]scale=iw/2:ih/2[4_alpha_speed_rot_scale];
[3_out][4_alpha_speed_rot_scale]overlay=x=593:y=337:enable='between(t,0,3.2)':format=rgb"
-preset ultrafast -crf 23 d4d85756d7b54735b95720f9280bf6e2.mp4

log from ffmpeg:

ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2_1 --enable-shared
--enable-pthreads --enable-version3 --enable-avresample --cc=clang
--host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl
--enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame
--enable-libopus --enable-librav1e --enable-librubberband
--enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora
--enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid
--enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r
--enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr
--enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
--enable-videotoolbox
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
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'3d9678e2e58c4d08a24363468d0cfd3e.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.77.100
Duration: 00:00:03.72, start: 0.000000, bitrate: 2333 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 /
0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2331 kb/s, 25 fps, 25
tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Input #1, png_pipe, from 'caption-1616544596077.png':
Duration: N/A, bitrate: N/A
Stream #1:0: Video: png, rgba(pc), 1382x884, 25 tbr, 25 tbn, 25 tbc
Input #2, png_pipe, from 'caption-1616544596080.png':
Duration: N/A, bitrate: N/A
Stream #2:0: Video: png, rgba(pc), 612x612, 25 tbr, 25 tbn, 25 tbc
Input #3, png_pipe, from 'caption-1616544597262.png':
Duration: N/A, bitrate: N/A
Stream #3:0: Video: png, rgba(pc), 720x266, 25 tbr, 25 tbn, 25 tbc
Input #4, png_pipe, from 'caption-1616544598027.png':
Duration: N/A, bitrate: N/A
Stream #4:0: Video: png, rgba(pc), 304x170, 25 tbr, 25 tbn, 25 tbc
File 'd4d85756d7b54735b95720f9280bf6e2.mp4' already exists. Overwrite?
[y/N] y
Stream mapping:
Stream #0:0 (h264) -> overlay:main
Stream #1:0 (png) -> format
Stream #2:0 (png) -> format
Stream #3:0 (png) -> format
Stream #4:0 (png) -> format
overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x7fb2c7015a00] using SAR=1/1
[libx264 @ 0x7fb2c7015a00] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fb2c7015a00] profile High 4:4:4 Predictive, level 3.1, 4:4:4,
8-bit
[libx264 @ 0x7fb2c7015a00] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC
codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options:
cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1
psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=18
lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250
keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'd4d85756d7b54735b95720f9280bf6e2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.45.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p,
1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
encoder : Lavc58.91.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 17 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
speed= frame= 93 fps=0.0 q=-1.0 Lsize= 972kB time=00:00:03.68
bitrate=2164.1kbits/s speed=4.01x
video:971kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.121794%
[libx264 @ 0x7fb2c7015a00] frame I:1 Avg QP:20.00 size: 90127
[libx264 @ 0x7fb2c7015a00] frame P:92 Avg QP:18.23 size: 9821
[libx264 @ 0x7fb2c7015a00] mb I I16..4: 100.0% 0.0% 0.0%
[libx264 @ 0x7fb2c7015a00] mb P I16..4: 1.7% 0.0% 0.0% P16..4: 19.9%
0.0% 0.0% 0.0% 0.0% skip:78.4%
[libx264 @ 0x7fb2c7015a00] coded y,u,v intra: 33.9% 3.1% 5.2% inter: 8.6%
0.9% 0.8%
[libx264 @ 0x7fb2c7015a00] i16 v,h,dc,p: 29% 34% 19% 18%
[libx264 @ 0x7fb2c7015a00] kb/s:2136.99
I also attach input files, and output files for you to be sure, those input
files are fine. (
https://drive.google.com/drive/folders/1MeOR7uXRGo4k6hppie65jfbNwh5Tzf_Z?usp=sharing
)

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Screenshot 2021-03-24 at 01.35.18.png (389K) Download Attachment

Mikołaj Henklewski

FFmpeg is adding black borders when scaling to overlay PNG.

Hi,

I have a few PNG files that I want to add to video, but on final video
after scaling them they have unnecessary outlines.. Question how to remove
it?
my ffmpeg command is:

ffmpeg -i 3d9678e2e58c4d08a24363468d0cfd3e.mp4 -i
caption-1616544596077.png -i caption-1616544596080.png -filter_complex
[1:v]rotate=6.178465552059927:c=none:ow=rotw(6.178465552059927):oh=roth(6.178465552059927)[1_rot];
[1_rot]scale=iw/2:ih/2[1_rot_scale];
[0:v][1_rot_scale]overlay=x=288:y=50:enable='between(t,0,3.2)':format=auto[1_out];
[2:v]rotate=0.0:c=none:ow=rotw(0.0):oh=roth(0.0)[2_rot];[2_rot]scale=iw/2:ih/2[2_rot_scale];
[1_out[2_rot_scale]overlay=x=589:y=71:enable='between(t,0,3.2)':format=auto"
-preset ultrafast -crf 23 out.mp4

log from ffmpeg:

ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
built with Apple clang version 12.0.0 (clang-1200.0.32.29)
configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2_1 --enable-shared
--enable-pthreads --enable-version3 --enable-avresample --cc=clang
--host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl
--enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame
--enable-libopus --enable-librav1e --enable-librubberband
--enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora
--enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid
--enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r
--enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr
--enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
--enable-videotoolbox
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
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'3d9678e2e58c4d08a24363468d0cfd3e.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.77.100
Duration: 00:00:03.72, start: 0.000000, bitrate: 2333 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 /
0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2331 kb/s, 25 fps, 25
tbr, 12800 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
Input #1, png_pipe, from 'caption-1616544596077-d.png':
Duration: N/A, bitrate: N/A
Stream #1:0: Video: png, rgba(pc), 1382x884, 25 tbr, 25 tbn, 25 tbc
Input #2, png_pipe, from 'caption-1616544596080-d.png':
Duration: N/A, bitrate: N/A
Stream #2:0: Video: png, rgba(pc), 612x612, 25 tbr, 25 tbn, 25 tbc
File 'out.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
Stream #0:0 (h264) -> overlay:main
Stream #1:0 (png) -> rotate
Stream #2:0 (png) -> rotate
overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x7f8999025c00] using SAR=1/1
[libx264 @ 0x7f8999025c00] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7f8999025c00] profile High 4:4:4 Predictive, level 3.1, 4:4:4,
8-bit
[libx264 @ 0x7f8999025c00] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC
codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options:
cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1
psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=18
lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250
keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'out.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.45.100
Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p,
1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
Metadata:
encoder : Lavc58.91.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 93 fps=0.0 q=-1.0 Lsize= 967kB time=00:00:03.68
bitrate=2152.5kbits/s speed=8.66x
video:966kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.122451%
[libx264 @ 0x7f8999025c00] frame I:1 Avg QP:20.00 size: 85204
[libx264 @ 0x7f8999025c00] frame P:92 Avg QP:18.23 size: 9817
[libx264 @ 0x7f8999025c00] mb I I16..4: 100.0% 0.0% 0.0%
[libx264 @ 0x7f8999025c00] mb P I16..4: 1.7% 0.0% 0.0% P16..4: 19.9%
0.0% 0.0% 0.0% 0.0% skip:78.4%
[libx264 @ 0x7f8999025c00] coded y,u,v intra: 33.6% 3.0% 4.9% inter: 8.6%
0.9% 0.8%
[libx264 @ 0x7f8999025c00] i16 v,h,dc,p: 30% 33% 18% 18%
[libx264 @ 0x7f8999025c00] kb/s:2125.53
I also attach input files, and output files for you to be sure, those input
files are fine. (
https://drive.google.com/drive/folders/1MeOR7uXRGo4k6hppie65jfbNwh5Tzf_Z?usp=sharing
)

_______________________________________________
ffmpeg-user mailing list
[hidden email]
https://ffmpeg.org/mailman/listinfo/ffmpeg-user

To unsubscribe, visit link above, or email
[hidden email] with subject "unsubscribe".

Screenshot 2021-03-24 at 01.35.18.png (389K) Download Attachment