Hello list members,
I have some wrong aspect rationed video which size is 856x480 pixel and 103
pixel black band on both side.
I thought they can be corrected with -filter:v crop like the following:
$ ffplay -i v01.wmv -vf "crop=856:480:103:0"
ffplay version N-69655-g1df841f Copyright (c) 2003-2015 the FFmpeg developers
built with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
configuration: --prefix=/Volumes/ffmpeg_compile --pkg-config-flags=--static
--disable-ffserver --enable-gpl --enable-version3 --enable-nonfree
--enable-postproc --enable-filters --enable-runtime-cpudetect --enable-bzlib
--enable-zlib --enable-libmp3lame --enable-libfdk-aac --enable-libvo-aacenc
--enable-libvo-amrwbenc --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libvorbis --enable-libspeex --enable-libopus --enable-libgsm
--enable-libtwolame --enable-libsoxr --enable-libwavpack --enable-libmodplug
--enable-libopenjpeg --enable-libwebp --enable-libtheora --enable-libx264
--enable-libopenh264 --enable-libx265 --enable-libxvid --enable-libvpx
--enable-libxavs --enable-libfreetype --enable-fontconfig --enable-libfribidi
--enable-libass --enable-libbluray --enable-libvidstab --disable-indev=qtkit
--disable-indev=x11grab_xcb --disable-outdev=sdl
libavutil 54. 18.100 / 54. 18.100
libavcodec 56. 21.102 / 56. 21.102
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 9.104 / 5. 9.104
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[wmv3 @ 0x7fb72d807c00] Extra data: 8 bits left, value: 00B f=0/0
Input #0, asf, from 'v01.wmv':
Metadata:
Application : Windows ムービー メーカー 2.1.4028.0
WMFSDKVersion : 11.0.5721.5275
WMFSDKNeeded : 0.0.0.0000
artist : PCサイト作業用
IsVBR : 0
DeviceConformanceTemplate: MP@HL
Duration: 00:02:00.28, start: 0.000000, bitrate: 2070 kb/s
Stream #0:0(jpn): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels,
fltp, 160 kb/s
Stream #0:1(jpn): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 856x480,
1900 kb/s, SAR 160:160 DAR 107:60, 30 fps, 30 tbr, 1k tbn, 1k tbc
[wmv3 @ 0x7fb72d807c00] Extra data: 8 bits left, value: 0
4.30 A-V: -0.021 fd= 13 aq= 22KB vq= 651KB sq= 0B f=0/0
But the result is same as not cropping one. Then I thought that I should use
scale filter too like the following:
$ ffplay -i v01.wmv -vf "crop=640:360:103:0, scale=856:480"
ffplay version N-69655-g1df841f Copyright (c) 2003-2015 the FFmpeg developers
built with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)
configuration: --prefix=/Volumes/ffmpeg_compile --pkg-config-flags=--static
--disable-ffserver --enable-gpl --enable-version3 --enable-nonfree
--enable-postproc --enable-filters --enable-runtime-cpudetect --enable-bzlib
--enable-zlib --enable-libmp3lame --enable-libfdk-aac --enable-libvo-aacenc
--enable-libvo-amrwbenc --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libvorbis --enable-libspeex --enable-libopus --enable-libgsm
--enable-libtwolame --enable-libsoxr --enable-libwavpack --enable-libmodplug
--enable-libopenjpeg --enable-libwebp --enable-libtheora --enable-libx264
--enable-libopenh264 --enable-libx265 --enable-libxvid --enable-libvpx
--enable-libxavs --enable-libfreetype --enable-fontconfig --enable-libfribidi
--enable-libass --enable-libbluray --enable-libvidstab --disable-indev=qtkit
--disable-indev=x11grab_xcb --disable-outdev=sdl
libavutil 54. 18.100 / 54. 18.100
libavcodec 56. 21.102 / 56. 21.102
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 9.104 / 5. 9.104
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[wmv3 @ 0x7fe2ac011600] Extra data: 8 bits left, value: 00B f=0/0
Input #0, asf, from 'v01.wmv':
Metadata:
Application : Windows ムービー メーカー 2.1.4028.0
WMFSDKVersion : 11.0.5721.5275
WMFSDKNeeded : 0.0.0.0000
artist : PCサイト作業用
IsVBR : 0
DeviceConformanceTemplate: MP@HL
Duration: 00:02:00.28, start: 0.000000, bitrate: 2070 kb/s
Stream #0:0(jpn): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, 2 channels,
fltp, 160 kb/s
Stream #0:1(jpn): Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 856x480,
1900 kb/s, SAR 160:160 DAR 107:60, 30 fps, 30 tbr, 1k tbn, 1k tbc
[wmv3 @ 0x7fe2ac011600] Extra data: 8 bits left, value: 0
[swscaler @ 0x7fe2ab859a00] Warning: data is not aligned! This can lead to a
speedloss
1.95 A-V: 0.015 fd= 9 aq= 22KB vq= 611KB sq= 0B f=0/0
This gives me expected result but ffplay warns like following:
[swscaler @ 0x7fe2ab859a00] Warning: data is not aligned! This can lead to a
speed loss
Am I doing proper with correction of aspect ratio or is there any much better
way?
Once I will find the correct way, I will re-encode video with ffmpeg.
Thanks for advice.
// Miya
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