comando di ffmpeg per colture e trasporre il video esce ingrandita cattiva qualità

Question

Sto cercando di convertire un video mp4 di dimensioni di solito 960x720 in uno sqaure 480: 480 video, ma si esce guardando schiacciata di solito, il comando è

"-y -i %s -vf crop=480:480,transpose=%d -threads 5 -metadata:s:v rotate=0 -c:v libx264 -crf 27 -preset ultrafast -c:a copy -bsf:a aac_adtstoasc %s"; 

Mi manca qualcosa, devo prima ridimensionare o qualcosa del genere?

** EDIT aggiunta uscita console completa. Il comando ffmpeg è aggiornato, ma l'obiettivo rimane sempre lo stesso, fare un video di arbitrario e raccolto quadrato è

07-14 22:30:32.813: D/ffmpeg(30354): -y -i /data/data/com.myapp.app/cache:temp/i7h4ajm0nim1mbcnrqotvrhhsc.mp4 -vf scale=iw*sar:ih,transpose=1 -threads 5 -metadata:s:v rotate=0 -c:v libx264 -crf 27 -preset ultrafast -c:a copy -bsf:a aac_adtstoasc -aspect 1:1 /data/data/com.myapp.app/cache:temp/p1t3bhs0oa3lpqa67g5i9ninm9.ts 
07-14 22:30:32.903: D/ffmpeg(30354): new time reamining 9283 
07-14 22:30:32.913: D/FFmpeg(30354): Running publishing updates method 
07-14 22:30:35.963: D/ffmpeg(30354): WARNING: linker: /data/data/com.myapp.app/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix. 
07-14 22:30:35.963: D/ffmpeg(30354): ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers 
07-14 22:30:35.963: D/ffmpeg(30354): built on Jun 3 2015 21:56:01 with gcc 4.8 (GCC) 
07-14 22:30:35.963: D/ffmpeg(30354): configuration: --target-os=linux --cross-prefix=/Users/Brian1/development/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/Users/Brian1/development/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-small --enable-libx264 --enable-pthreads --disable-muxers --enable-muxer=mpegts --enable-muxer=mp4 --disable-demuxers --enable-demuxer=mpegts --enable-demuxer=mov --enable-demuxer=mpeg --enable-demuxer=mp4 --disable-debug --disable-decoders --enable-decoder=h264 --enable-decoder=aac --disable-devices --disable-encoders --enable-encoder=libx264 --disable-network --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/Users/Brian1/development/ffmpeg-android/ffmpeg-pkg-config --prefix=/Users/Brian1/development/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/Users/Brian1/development/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/Users/Brian1/development/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs=-lm --extra-cxxflags= 
07-14 22:30:35.963: D/ffmpeg(30354): libavutil  54. 7.100/54. 7.100 
07-14 22:30:35.963: D/ffmpeg(30354): libavcodec  56. 1.100/56. 1.100 
07-14 22:30:35.963: D/ffmpeg(30354): libavformat 56. 4.101/56. 4.101 
07-14 22:30:35.963: D/ffmpeg(30354): libavdevice 56. 0.100/56. 0.100 
07-14 22:30:35.963: D/ffmpeg(30354): libavfilter  5. 1.100/5. 1.100 
07-14 22:30:35.963: D/ffmpeg(30354): libswscale  3. 0.100/3. 0.100 
07-14 22:30:35.963: D/ffmpeg(30354): libswresample 1. 1.100/1. 1.100 
07-14 22:30:35.963: D/ffmpeg(30354): libpostproc 53. 0.100/53. 0.100 
07-14 22:30:35.963: D/ffmpeg(30354): Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/data/com.myapp.app/cache:temp/i7h4ajm0nim1mbcnrqotvrhhsc.mp4': 
07-14 22:30:35.963: D/ffmpeg(30354): Metadata: 
07-14 22:30:35.963: D/ffmpeg(30354):  major_brand  : mp42 
07-14 22:30:35.963: D/ffmpeg(30354):  minor_version : 0 
07-14 22:30:35.963: D/ffmpeg(30354):  compatible_brands: isommp42 
07-14 22:30:35.963: D/ffmpeg(30354):  creation_time : 2015-07-15 05:30:32 
07-14 22:30:35.963: D/ffmpeg(30354): Duration: 00:00:02.75, start: 0.000000, bitrate: 9315 kb/s 
07-14 22:30:35.963: D/ffmpeg(30354):  Stream #0:0(eng): Video: h264 (avc1/0x31637661), yuv420p, 960x720, 10062 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 180k tbc (default) 
07-14 22:30:35.963: D/ffmpeg(30354):  Metadata: 
07-14 22:30:35.963: D/ffmpeg(30354):  rotate   : 90 
07-14 22:30:35.963: D/ffmpeg(30354):  creation_time : 2015-07-15 05:30:32 
07-14 22:30:35.963: D/ffmpeg(30354):  handler_name : VideoHandle 
07-14 22:30:35.963: D/ffmpeg(30354):  Side data: 
07-14 22:30:35.963: D/ffmpeg(30354):  displaymatrix: rotation of -90.00 degrees 
07-14 22:30:35.963: D/ffmpeg(30354):  Stream #0:1(eng): Audio: aac (mp4a/0x6134706D), 48000 Hz, stereo, fltp, 151 kb/s (default) 
07-14 22:30:35.963: D/ffmpeg(30354):  Metadata: 
07-14 22:30:35.963: D/ffmpeg(30354):  creation_time : 2015-07-15 05:30:32 
07-14 22:30:35.963: D/ffmpeg(30354):  handler_name : SoundHandle 
07-14 22:30:35.963: D/ffmpeg(30354): [libx264 @ 0xb6808800] using SAR=4/3 
07-14 22:30:35.963: D/ffmpeg(30354): [libx264 @ 0xb6808800] using cpu capabilities: none! 
07-14 22:30:35.963: D/ffmpeg(30354): [libx264 @ 0xb6808800] profile Constrained Baseline, level 3.1 
07-14 22:30:35.963: D/ffmpeg(30354): [adts @ 0xb685b000] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead. 
07-14 22:30:35.963: D/ffmpeg(30354): Output #0, mpegts, to '/data/data/com.myapp.app/cache:temp/p1t3bhs0oa3lpqa67g5i9ninm9.ts': 
07-14 22:30:35.963: D/ffmpeg(30354): Metadata: 
07-14 22:30:35.963: D/ffmpeg(30354):  major_brand  : mp42 
07-14 22:30:35.963: D/ffmpeg(30354):  minor_version : 0 
07-14 22:30:35.963: D/ffmpeg(30354):  compatible_brands: isommp42 
07-14 22:30:35.963: D/ffmpeg(30354):  encoder   : Lavf56.4.101 
07-14 22:30:35.963: D/ffmpeg(30354):  Stream #0:0(eng): Video: h264 (libx264), yuv420p, 720x960 [SAR 4:3 DAR 1:1], q=-1--1, 29.97 fps, 90k tbn, 29.97 tbc (default) 
07-14 22:30:35.963: D/ffmpeg(30354):  Metadata: 
07-14 22:30:35.963: D/ffmpeg(30354):  handler_name : VideoHandle 
07-14 22:30:35.963: D/ffmpeg(30354):  creation_time : 2015-07-15 05:30:32 
07-14 22:30:35.963: D/ffmpeg(30354):  rotate   : 0 
07-14 22:30:35.963: D/ffmpeg(30354):  encoder   : Lavc56.1.100 libx264 
07-14 22:30:35.963: D/ffmpeg(30354):  Stream #0:1(eng): Audio: aac (mp4a/0x6134706D), 48000 Hz, stereo, 151 kb/s (default) 
07-14 22:30:35.963: D/ffmpeg(30354):  Metadata: 
07-14 22:30:35.963: D/ffmpeg(30354):  creation_time : 2015-07-15 05:30:32 
07-14 22:30:35.963: D/ffmpeg(30354):  handler_name : SoundHandle 
07-14 22:30:35.963: D/ffmpeg(30354): Stream mapping: 
07-14 22:30:35.963: D/ffmpeg(30354): Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264)) 
07-14 22:30:35.963: D/ffmpeg(30354): Stream #0:1 -> #0:1 (copy) 
07-14 22:30:35.963: D/ffmpeg(30354): Press [q] to stop, [?] for help 
07-14 22:30:35.963: D/ffmpeg(30354): frame= 17 fps=0.0 q=27.0 size=  0kB time=00:00:00.36 bitrate= 0.0kbits/s  
07-14 22:30:35.963: D/ffmpeg(30354): frame= 33 fps= 32 q=27.0 size=  164kB time=00:00:01.15 bitrate=1163.1kbits/s  
07-14 22:30:35.963: D/ffmpeg(30354): frame= 46 fps= 30 q=29.0 size=  213kB time=00:00:01.33 b 

Answer 1

si può provare questo (si occupa di ritaglio e ridimensionamento) ...

ffmpeg -i input.file -s 480x480 -vf crop=480:480,setdar=1:1,setsar=1:1 output.mp4

-s imposterà scala (video zona tela)
crop=480:480 sarà ritagliare dal centro .. se avete bisogno di uso specifico: crop=480:480:pos-X:pos-Y
setdar imposterà Displa y Proporzioni
setsar imposterà Esempio Aspect Ratio

Risultati: (schermo afferrato alambicchi MP4 via MPC-Home Cinema)