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Sur d’autres sites (6205)
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FFMPEG = I tried resizing a video, but got different resolution than I wanted [closed]
10 janvier 2024, par wakanasakaiI downloaded a video that had some black bars (left & right), so I used the following command in FFmpeg to make various changes to it. I tested it on a 10 second clip to see what the result would look like.


-ss 00:04:44 -to 00:04:54 -vf "crop=1870:20:20:0","scale=640x480:flags=lanczos","eq=gamma=1.5:saturation=1.3:contrast=1.2"


The original video is an mp4, with a resolution of 1920 x 1080. Besides trying to crop it & adjust the gamma, saturation, & contrast, I also tried to resize it to 640 x 480. Instead, it's resulting resolution is 44880 x 480 ! I have a link to it for anybody who wants to examine it directly. (It's only 487 kb.)
text


I've tried using FFmpeg before, & it never did anything so insane. (It cropped it, & adjusted the gamma a saturation (I didn't test the contrast until THIS time), but it did not resize it at all.)


Here is FFmpeg's log file for it. Guesses as to the cause of the insane result, & advice on how to achieve the DESIRED result (in 1 pass, if possible) are requested.


ffmpeg -hwaccel auto -y -i "/storage/emulated/0/bluetooth/Barbie & the Rockers=1080-Out of this world (1987).mp4" -ss 00:04:44 -to 00:04:54 -vf "crop=1870:20:20:0","scale=640x480:flags=lanczos","eq=gamma=1.5:saturation=1.3:contrast=1.2" "/storage/emulated/0/Movies/Barbie.mp4"

ffmpeg version 6.0 Copyright (c) 2000-2023 the FFmpeg developers
 built with gcc 4.9.x (GCC) 20150123 (prerelease)
 configuration: --enable-version3 --enable-gpl --enable-nonfree --disable-indev=v4l2 --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libvpx --enable-libvorbis --enable-libtheora --enable-libopus --enable-libfdk-aac --enable-libfreetype --enable-libass --enable-libfribidi --enable-fontconfig --enable-pthreads --enable-libxvid --enable-filters --enable-openssl --enable-librtmp --disable-protocol='udp,udplite' --enable-libopencore-amrwb --enable-libopencore-amrnb --enable-libvo-amrwbenc --enable-libspeex --enable-libsoxr --enable-libwebp --enable-libxml2 --enable-libopenh264 --enable-jni --prefix=/home/silentlexx/AndroidstudioProjects/ffmpeg/ffmpeg/build/arm-api18-r13b --sysroot=/home/silentlexx/Android/android-ndk-r13b/platforms/android-18/arch-arm --arch=arm --disable-shared --enable-static --enable-pic --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffnvcodec --disable-avdevice --disable-debug --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-symver --cross-prefix=/home/silentlexx/Android/android-ndk-r13b/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --target-os=android --enable-cross-compile --pkg-config-flags=--static --extra-libs='-lgnustl_static -lm -lpng -l:libz.so -lpthread' --enable-asm --enable-neon --enable-small
 libavutil 58. 2.100 / 58. 2.100
 libavcodec 60. 3.100 / 60. 3.100
 libavformat 60. 3.100 / 60. 3.100
 libavfilter 9. 3.100 / 9. 3.100
 libswscale 7. 1.100 / 7. 1.100
 libswresample 4. 10.100 / 4. 10.100
 libpostproc 57. 1.100 / 57. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/bluetooth/Barbie & the Rockers=1080-Out of this world (1987).mp4':
 Metadata:
 major_brand : mp42
 minor_version : 512
 compatible_brands: mp41isomiso2
 creation_time : 2024-01-04T01:46:07.000000Z
 Duration: 00:45:33.10, start: 0.000000, bitrate: 3404 kb/s
 Stream #0:0[0x1](und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 3272 kb/s, 30 fps, 30 tbr, 15360 tbn (default)
 Metadata:
 creation_time : 2023-06-25T13:25:03.000000Z
 vendor_id : [0][0][0][0]
 Stream #0:1[0x2](eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
 Metadata:
 creation_time : 2023-06-25T13:25:03.000000Z
 vendor_id : [0][0][0][0]
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
 Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0xf38cd180] using SAR=561/8
[libx264 @ 0xf38cd180] using cpu capabilities: ARMv6 NEON
[libx264 @ 0xf38cd180] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0xf38cd180] 264 - core 158 r2984 3759fcb - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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 '/storage/emulated/0/Movies/Barbie.mp4':
 Metadata:
 major_brand : mp42
 minor_version : 512
 compatible_brands: mp41isomiso2
 encoder : Lavf60.3.100
 Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 640x480 [SAR 561:8 DAR 187:2], q=2-31, 30 fps, 15360 tbn (default)
 Metadata:
 creation_time : 2023-06-25T13:25:03.000000Z
 vendor_id : [0][0][0][0]
 encoder : Lavc60.3.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
 Metadata:
 creation_time : 2023-06-25T13:25:03.000000Z
 vendor_id : [0][0][0][0]
 encoder : Lavc60.3.100 aac
frame= 0 fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=00:00:00.16 bitrate= 2.4kbits/s speed=0.00197x 
frame= 0 fps=0.0 q=0.0 size= 0kB time=00:00:00.71 bitrate= 0.5kbits/s speed=0.00867x 
frame= 13 fps=0.2 q=29.0 size= 0kB time=00:00:01.48 bitrate= 0.3kbits/s speed=0.0178x 
frame= 45 fps=0.5 q=29.0 size= 0kB time=00:00:02.55 bitrate= 0.2kbits/s speed=0.0304x 
frame= 78 fps=0.9 q=29.0 size= 0kB time=00:00:03.66 bitrate= 0.1kbits/s speed=0.0434x 
frame= 114 fps=1.3 q=29.0 size= 0kB time=00:00:04.85 bitrate= 0.1kbits/s speed=0.057x 
frame= 146 fps=1.7 q=29.0 size= 0kB time=00:00:05.92 bitrate= 0.1kbits/s speed=0.0692x 
frame= 178 fps=2.1 q=29.0 size= 0kB time=00:00:07.03 bitrate= 0.1kbits/s speed=0.0817x 
frame= 209 fps=2.4 q=29.0 size= 256kB time=00:00:08.03 bitrate= 261.1kbits/s speed=0.0928x 
frame= 240 fps=2.8 q=29.0 size= 256kB time=00:00:09.07 bitrate= 231.0kbits/s speed=0.104x 
frame= 300 fps=3.4 q=-1.0 Lsize= 445kB time=00:00:09.98 bitrate= 365.2kbits/s speed=0.114x 
video:275kB audio:159kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.692692%
[libx264 @ 0xf38cd180] frame I:10 Avg QP:20.34 size: 2434
[libx264 @ 0xf38cd180] frame P:129 Avg QP:21.89 size: 1292
[libx264 @ 0xf38cd180] frame B:161 Avg QP:21.69 size: 555
[libx264 @ 0xf38cd180] consecutive B-frames: 20.0% 18.7% 20.0% 41.3%
[libx264 @ 0xf38cd180] mb I I16..4: 30.2% 66.5% 3.2%
[libx264 @ 0xf38cd180] mb P I16..4: 14.3% 17.7% 0.2% P16..4: 12.7% 2.7% 0.4% 0.0% 0.0% skip:52.1%
[libx264 @ 0xf38cd180] mb B I16..4: 2.1% 1.1% 0.0% B16..8: 21.9% 1.7% 0.0% direct: 1.5% skip:71.6% L0:46.0% L1:53.0% BI: 1.0%
[libx264 @ 0xf38cd180] 8x8 transform intra:54.9% inter:98.2%
[libx264 @ 0xf38cd180] coded y,uvDC,uvAC intra: 10.3% 14.9% 1.5% inter: 2.2% 5.4% 0.0%
[libx264 @ 0xf38cd180] i16 v,h,dc,p: 93% 2% 2% 4%
[libx264 @ 0xf38cd180] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 69% 1% 28% 0% 0% 1% 0% 0% 0%
[libx264 @ 0xf38cd180] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 76% 3% 17% 1% 1% 2% 0% 1% 0%
[libx264 @ 0xf38cd180] i8c dc,h,v,p: 45% 2% 53% 1%
[libx264 @ 0xf38cd180] Weighted P-Frames: Y:0.8% UV:0.8%
[libx264 @ 0xf38cd180] ref P L0: 57.0% 8.7% 24.0% 10.4%
[libx264 @ 0xf38cd180] ref B L0: 79.7% 17.3% 3.0%
[libx264 @ 0xf38cd180] ref B L1: 95.6% 4.4%
[libx264 @ 0xf38cd180] kb/s:224.32
[aac @ 0xf38cd880] Qavg: 457.489



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