[FFmpeg-user] afreqshift
Paul B Mahol
onemda at gmail.com
Wed Oct 21 21:36:54 EEST 2020
On Wed, Oct 21, 2020 at 08:14:50PM +0200, Michael Koch wrote:
> Hi,
>
> I'm just testing the new afreqshift filter.
> In my first test I did use only *.wav audio files. This test was successful.
>
> In my next test I'm using MP4 files. First I make a test video with a 5kHz
> tone:
> ffmpeg -f lavfi -i sine=f=5000:r=48000:d=5 -f lavfi -i color=black -lavfi
> showspectrum=legend=1 -y test.mp4
>
> Now I try to shift the frequency down by 4kHz:
> ffmpeg -i test.mp4 -lavfi afreqshift=-4000,showspectrum=legend=1 -y out.mp4
>
> The spectrum display is showing the expected 1kHz, but what I hear is 5kHz.
> What's wrong with my command line? Why is the output of the afreqshift
> filter not mapped to the output file?
>
Something like this:
ffmpeg -i test.mp4 -lavfi "asplit=2[a][b],[b]afreqshift=-4000,showspectrum=legend=1[b]" -map "[a]" -map "[b]" -y out.mp4
You ignored fact that showspectrum is just A->V filter.
> Michael
>
>
>
> C:\Users\astro\Desktop>c:\ffmpeg\ffmpeg -f lavfi -i sine=f=5000:r=48000:d=5
> -f lavfi -i color=black -lavfi showspectrum=legend=1 -y test.mp4
> ffmpeg version 2020-10-21-git-289e964873-full_build-www.gyan.dev Copyright
> (c) 2000-2020 the FFmpeg developers
> built with gcc 10.2.0 (Rev3, Built by MSYS2 project)
> configuration: --enable-gpl --enable-version3 --enable-static
> --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv
> --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma
> --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh
> --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca
> --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e
> --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265
> --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx
> --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi
> --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf
> --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec
> --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx
> --enable-libglslang --enable-vulkan --enable-libcdio --enable-libgme
> --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb
> --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame
> --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm
> --enable-libopencore-amrnb --enable-libopus --enable-libspeex
> --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite
> --enable-libmysofa --enable-librubberband --enable-libsoxr
> --enable-chromaprint
> libavutil 56. 60.100 / 56. 60.100
> libavcodec 58.111.101 / 58.111.101
> libavformat 58. 62.100 / 58. 62.100
> libavdevice 58. 11.102 / 58. 11.102
> libavfilter 7. 88.100 / 7. 88.100
> libswscale 5. 8.100 / 5. 8.100
> libswresample 3. 8.100 / 3. 8.100
> libpostproc 55. 8.100 / 55. 8.100
> Input #0, lavfi, from 'sine=f=5000:r=48000:d=5':
> Duration: N/A, start: 0.000000, bitrate: 768 kb/s
> Stream #0:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb/s
> Input #1, lavfi, from 'color=black':
> Duration: N/A, start: 0.000000, bitrate: N/A
> Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR
> 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
> Stream mapping:
> Stream #0:0 (pcm_s16le) -> showspectrum (graph 0)
> showspectrum (graph 0) -> Stream #0:0 (libx264)
> Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native))
> Press [q] to stop, [?] for help
> [libx264 @ 000001a6b13d0fc0] using SAR=1/1
> [libx264 @ 000001a6b13d0fc0] using cpu capabilities: MMX2 SSE2Fast SSSE3
> SSE4.2 AVX FMA3 BMI2 AVX2
> [libx264 @ 000001a6b13d0fc0] profile High 4:4:4 Predictive, level 3.2,
> 4:4:4, 8-bit
> [libx264 @ 000001a6b13d0fc0] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC
> codec - Copyleft 2003-2020 - 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=4 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 'test.mp4':
> Metadata:
> encoder : Lavf58.62.100
> Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 924x640
> [SAR 1:1 DAR 231:160], q=-1--1, 46.88 fps, 12k tbn, 46.88 tbc
> Metadata:
> encoder : Lavc58.111.101 libx264
> Side data:
> cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
> Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp,
> 69 kb/s
> Metadata:
> encoder : Lavc58.111.101 aac
> [Parsed_sine_0 @ 000001a6b1372040] EOF timestamp not reliableitrate=
> 0.1kbits/s speed=6.67x
> frame= 234 fps=0.0 q=-1.0 Lsize= 72kB time=00:00:05.01 bitrate=
> 117.6kbits/s speed=6.45x
> video:36kB audio:29kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: 10.633892%
> [libx264 @ 000001a6b13d0fc0] frame I:1 Avg QP:18.87 size: 11825
> [libx264 @ 000001a6b13d0fc0] frame P:60 Avg QP:14.80 size: 157
> [libx264 @ 000001a6b13d0fc0] frame B:173 Avg QP:17.49 size: 85
> [libx264 @ 000001a6b13d0fc0] consecutive B-frames: 0.9% 1.7% 0.0% 97.4%
> [libx264 @ 000001a6b13d0fc0] mb I I16..4: 28.0% 62.2% 9.8%
> [libx264 @ 000001a6b13d0fc0] mb P I16..4: 0.1% 0.1% 0.0% P16..4: 0.3%
> 0.1% 0.0% 0.0% 0.0% skip:99.3%
> [libx264 @ 000001a6b13d0fc0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 0.6%
> 0.0% 0.0% direct: 0.0% skip:99.3% L0:50.9% L1:48.1% BI: 1.0%
> [libx264 @ 000001a6b13d0fc0] 8x8 transform intra:63.0% inter:3.0%
> [libx264 @ 000001a6b13d0fc0] coded y,u,v intra: 5.3% 0.0% 0.0% inter: 0.0%
> 0.0% 0.0%
> [libx264 @ 000001a6b13d0fc0] i16 v,h,dc,p: 77% 23% 1% 0%
> [libx264 @ 000001a6b13d0fc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 65% 6% 29% 0%
> 0% 0% 0% 0% 0%
> [libx264 @ 000001a6b13d0fc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 37% 29% 25% 1%
> 1% 2% 3% 1% 2%
> [libx264 @ 000001a6b13d0fc0] Weighted P-Frames: Y:0.0% UV:0.0%
> [libx264 @ 000001a6b13d0fc0] ref P L0: 73.5% 8.1% 12.0% 6.5%
> [libx264 @ 000001a6b13d0fc0] ref B L0: 69.6% 29.3% 1.1%
> [libx264 @ 000001a6b13d0fc0] ref B L1: 95.1% 4.9%
> [libx264 @ 000001a6b13d0fc0] kb/s:57.68
> [aac @ 000001a6b13d4840] Qavg: 62732.414
>
> C:\Users\astro\Desktop>c:\ffmpeg\ffmpeg -i test.mp4 -lavfi
> afreqshift=-4000,showspectrum=legend=1 -y out.mp4
> ffmpeg version 2020-10-21-git-289e964873-full_build-www.gyan.dev Copyright
> (c) 2000-2020 the FFmpeg developers
> built with gcc 10.2.0 (Rev3, Built by MSYS2 project)
> configuration: --enable-gpl --enable-version3 --enable-static
> --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv
> --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma
> --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh
> --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca
> --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e
> --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265
> --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx
> --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi
> --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf
> --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec
> --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx
> --enable-libglslang --enable-vulkan --enable-libcdio --enable-libgme
> --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb
> --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame
> --enable-libvo-amrwbenc --enable-libilbc --enable-libgsm
> --enable-libopencore-amrnb --enable-libopus --enable-libspeex
> --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite
> --enable-libmysofa --enable-librubberband --enable-libsoxr
> --enable-chromaprint
> libavutil 56. 60.100 / 56. 60.100
> libavcodec 58.111.101 / 58.111.101
> libavformat 58. 62.100 / 58. 62.100
> libavdevice 58. 11.102 / 58. 11.102
> libavfilter 7. 88.100 / 7. 88.100
> libswscale 5. 8.100 / 5. 8.100
> libswresample 3. 8.100 / 3. 8.100
> libpostproc 55. 8.100 / 55. 8.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
> Metadata:
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf58.62.100
> Duration: 00:00:05.02, start: 0.000000, bitrate: 117 kb/s
> Stream #0:0(und): Video: h264 (High 4:4:4 Predictive) (avc1 /
> 0x31637661), yuv444p, 924x640 [SAR 1:1 DAR 231:160], 58 kb/s, 46.88 fps,
> 46.88 tbr, 12k tbn, 93.75 tbc (default)
> Metadata:
> handler_name : VideoHandler
> Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono,
> fltp, 47 kb/s (default)
> Metadata:
> handler_name : SoundHandler
> Stream mapping:
> Stream #0:1 (aac) -> afreqshift (graph 0)
> showspectrum (graph 0) -> Stream #0:0 (libx264)
> Stream #0:1 -> #0:1 (aac (native) -> aac (native))
> Press [q] to stop, [?] for help
> [libx264 @ 000001cf9fc32ec0] using SAR=1/1
> [libx264 @ 000001cf9fc32ec0] using cpu capabilities: MMX2 SSE2Fast SSSE3
> SSE4.2 AVX FMA3 BMI2 AVX2
> [libx264 @ 000001cf9fc32ec0] profile High 4:4:4 Predictive, level 3.2,
> 4:4:4, 8-bit
> [libx264 @ 000001cf9fc32ec0] 264 - core 161 r3018 db0d417 - H.264/MPEG-4 AVC
> codec - Copyleft 2003-2020 - 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=4 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 'out.mp4':
> Metadata:
> major_brand : isom
> minor_version : 512
> compatible_brands: isomiso2avc1mp41
> encoder : Lavf58.62.100
> Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 924x640
> [SAR 1:1 DAR 231:160], q=-1--1, 46.88 fps, 12k tbn, 46.88 tbc (default)
> Metadata:
> encoder : Lavc58.111.101 libx264
> Side data:
> cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
> Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono,
> fltp, 69 kb/s (default)
> Metadata:
> handler_name : SoundHandler
> encoder : Lavc58.111.101 aac
> frame= 236 fps=0.0 q=-1.0 Lsize= 72kB time=00:00:05.01 bitrate=
> 117.8kbits/s dup=1 drop=0 speed= 6.7x
> video:38kB audio:27kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: 10.648475%
> [libx264 @ 000001cf9fc32ec0] frame I:1 Avg QP:17.09 size: 11790
> [libx264 @ 000001cf9fc32ec0] frame P:59 Avg QP:13.85 size: 157
> [libx264 @ 000001cf9fc32ec0] frame B:176 Avg QP:17.41 size: 98
> [libx264 @ 000001cf9fc32ec0] consecutive B-frames: 0.4% 0.0% 1.3% 98.3%
> [libx264 @ 000001cf9fc32ec0] mb I I16..4: 48.2% 41.7% 10.0%
> [libx264 @ 000001cf9fc32ec0] mb P I16..4: 0.0% 0.1% 0.0% P16..4: 0.4%
> 0.1% 0.0% 0.0% 0.0% skip:99.4%
> [libx264 @ 000001cf9fc32ec0] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 1.5%
> 0.0% 0.0% direct: 0.0% skip:98.4% L0:62.6% L1:36.9% BI: 0.4%
> [libx264 @ 000001cf9fc32ec0] 8x8 transform intra:44.4% inter:4.5%
> [libx264 @ 000001cf9fc32ec0] coded y,u,v intra: 5.6% 0.0% 0.0% inter: 0.0%
> 0.0% 0.0%
> [libx264 @ 000001cf9fc32ec0] i16 v,h,dc,p: 90% 10% 1% 0%
> [libx264 @ 000001cf9fc32ec0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 58% 5% 36% 1%
> 0% 0% 0% 0% 0%
> [libx264 @ 000001cf9fc32ec0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 31% 25% 1%
> 1% 2% 3% 1% 2%
> [libx264 @ 000001cf9fc32ec0] Weighted P-Frames: Y:0.0% UV:0.0%
> [libx264 @ 000001cf9fc32ec0] ref P L0: 74.2% 7.4% 11.9% 6.6%
> [libx264 @ 000001cf9fc32ec0] ref B L0: 56.7% 42.8% 0.5%
> [libx264 @ 000001cf9fc32ec0] ref B L1: 96.7% 3.3%
> [libx264 @ 000001cf9fc32ec0] kb/s:60.88
> [aac @ 000001cf9fcd90c0] Qavg: 63059.797
>
>
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