Whist usando "ffmpeg versão n4.0.1" Eu notei que no host CentOS6 dentro de um contêiner VMware a transcodificação de vídeo leva quase o dobro do tamanho de "ffmpeg versão 2.2.1".
Os índices de referência abaixo executaram 3 iterações, apenas o tempo mais rápido abaixo.
Arquivo testado com o mesmo estoque de vídeo de 2,8 MB.
Todas as VMs estão rodando a versão 6.10 do CentOS.
| VM | FFMpeg version| Time | | Virtualbox | 4.0.1 | 11 secs | | Virtualbox | 2.2.1 | 18 secs | | VMWare | 2.2.1 | 29 secs | | VMWare | 4.0.1 | 1 minuite |
Eu literalmente não tenho idéia do porque isso é diferente e não consigo encontrar nenhuma razão lógica para isso - qualquer FFMpeg / VMWare boffins lá fora tem alguma idéia do que poderia estar acontecendo?
4.01 é compilado da fonte, 2.2.1 é como por EPEL.
Apenas para adicionar - as informações da CPU do VMWare são as seguintes -
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 62 model name : Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz stepping : 4 microcode : 1064 cpu MHz : 2100.000 cache size : 15360 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx f16c rdrand hypervisor lahf_lm arat epb xsaveopt pln pts dtherm pti retpoline fsgsbase smep bogomips : 4200.00 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management:
Versus informações da CPU do VirtualBox reportadas como
rocessor : 0 vendor_id : GenuineIntel cpu family : 6 model : 158 model name : Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz stepping : 9 cpu MHz : 2903.925 cache size : 8192 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 22 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good xtopology nonstop_tsc pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 movbe popcnt aes xsave avx rdrand lahf_lm abm 3dnowprefetch fsgsbase avx2 invpcid rdseed bogomips : 5807.85 clflush size : 64 cache_alignment : 64 address sizes : 39 bits physical, 48 bits virtual power management:
O texto acima demonstra que a versão mais recente apresenta um desempenho melhor e pior em arquiteturas diferentes.
Para ser 100% claro, re-corri alguns benchmarks abaixo - isso é diferente de VMs na mesma nuvem com configurações idênticas -
FFMPeg 4 - 122.861 segundos
[root@proofing test]# ./benchmark.sh
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 62
model name : Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
stepping : 4
microcode : 1064
cpu MHz : 2100.000
cache size : 15360 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx f16c rdrand hypervisor lahf_lm arat epb xsaveopt pln pts dtherm pti retpoline fsgsbase smep
bogomips : 4200.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 62
model name : Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
stepping : 4
microcode : 1064
cpu MHz : 2100.000
cache size : 15360 KB
physical id : 2
siblings : 1
core id : 0
cpu cores : 1
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx f16c rdrand hypervisor lahf_lm arat epb xsaveopt pln pts dtherm pti retpoline fsgsbase smep
bogomips : 4200.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
ffmpeg version n4.0.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-23)
configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --extra-libs=-lpthread --extra-libs=-lm --bindir=/usr/bin --enable-gpl --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libtheora --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
libavutil 56. 14.100 / 56. 14.100
libavcodec 58. 18.100 / 58. 18.100
libavformat 58. 12.100 / 58. 12.100
libavdevice 58. 3.100 / 58. 3.100
libavfilter 7. 16.100 / 7. 16.100
libswscale 5. 1.100 / 5. 1.100
libswresample 3. 1.100 / 3. 1.100
libpostproc 55. 1.100 / 55. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/root/test/test.mov':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1mp42
creation_time : 2016-11-03T20:11:18.000000Z
Duration: 00:00:09.33, start: 0.000000, bitrate: 20807 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 20805 kb/s, 30 fps, 30 tbr, 30 tbn, 60 tbc (default)
Metadata:
creation_time : 2016-11-03T20:11:08.000000Z
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x2d05c40] using SAR=1/1
[libx264 @ 0x2d05c40] frame MB size (120x68) > level limit (1620)
[libx264 @ 0x2d05c40] DPB size (1 frames, 3133440 bytes) > level limit (0 frames, 3110400 bytes)
[libx264 @ 0x2d05c40] MB rate (244800) > level limit (40500)
[libx264 @ 0x2d05c40] using cpu capabilities: none!
[libx264 @ 0x2d05c40] profile Constrained Baseline, level 3.0
[libx264 @ 0x2d05c40] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 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=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=26.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1500 vbv_bufsize=3000 crf_max=0.0 nal_hrd=none ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/root/test/out.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1mp42
encoder : Lavf58.12.100
Stream #0:0(und): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
creation_time : 2016-11-03T20:11:08.000000Z
encoder : Lavc58.18.100 libx264
Side data:
cpb: bitrate max/min/avg: 1500000/0/0 buffer size: 3000000 vbv_delay: -1
[mp4 @ 0x2d04680] Starting second pass: moving the moov atom to the beginning of the file.0726x
frame= 280 fps=2.3 q=-1.0 Lsize= 1865kB time=00:00:09.30 bitrate=1642.5kbits/s speed=0.0757x
video:1863kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.103491%
[libx264 @ 0x2d05c40] frame I:2 Avg QP:37.09 size: 36746
[libx264 @ 0x2d05c40] frame P:278 Avg QP:38.97 size: 6594
[libx264 @ 0x2d05c40] mb I I16..4: 79.3% 0.0% 20.7%
[libx264 @ 0x2d05c40] mb P I16..4: 0.6% 0.0% 0.2% P16..4: 17.3% 2.7% 1.5% 0.0% 0.0% skip:77.7%
[libx264 @ 0x2d05c40] coded y,uvDC,uvAC intra: 30.9% 23.0% 0.2% inter: 3.0% 1.5% 0.0%
[libx264 @ 0x2d05c40] i16 v,h,dc,p: 33% 28% 9% 31%
[libx264 @ 0x2d05c40] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 4% 4% 13% 16% 21% 14% 14% 8% 6%
[libx264 @ 0x2d05c40] i8c dc,h,v,p: 85% 8% 7% 1%
[libx264 @ 0x2d05c40] kb/s:1634.35
122.861 seconds to complete
FFMpeg 2 - 32.378 segundos
[root@staging test]# ./benchmark.sh
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 62
model name : Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
stepping : 4
microcode : 1064
cpu MHz : 2100.000
cache size : 15360 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx f16c rdrand hypervisor lahf_lm arat epb xsaveopt pln pts dtherm pti retpoline fsgsbase smep
bogomips : 4200.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 62
model name : Intel(R) Xeon(R) CPU E5-2620 v2 @ 2.10GHz
stepping : 4
microcode : 1064
cpu MHz : 2100.000
cache size : 15360 KB
physical id : 2
siblings : 1
core id : 0
cpu cores : 1
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx f16c rdrand hypervisor lahf_lm arat epb xsaveopt pln pts dtherm pti retpoline fsgsbase smep
bogomips : 4200.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 13 2014 13:00:18 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --enable-runtime-cpudetect --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --enable-pthreads --enable-x11grab --enable-vdpau --disable-avisynth --enable-frei0r --enable-libopencv --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --disable-stripping
libavutil 52. 66.100 / 52. 66.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 2.100 / 4. 2.100
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/root/test/test.mov':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1mp42
creation_time : 2016-11-03 20:11:18
Duration: 00:00:09.33, start: 0.000000, bitrate: 20807 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 20805 kb/s, 30 fps, 30 tbr, 30 tbn, 60 tbc (default)
Metadata:
creation_time : 2016-11-03 20:11:08
[libx264 @ 0x2139060] using SAR=1/1
[libx264 @ 0x2139060] frame MB size (120x68) > level limit (1620)
[libx264 @ 0x2139060] DPB size (5 frames, 40800 mbs) > level limit (0 frames, 8100 mbs)
[libx264 @ 0x2139060] MB rate (244800) > level limit (40500)
[libx264 @ 0x2139060] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0x2139060] profile Constrained Baseline, level 3.0
[libx264 @ 0x2139060] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=0 ref=5 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 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=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=26.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=1500 vbv_bufsize=3000 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/root/test/out.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1mp42
encoder : Lavf55.33.100
Stream #0:0(und): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, max. 1500 kb/s, 15360 tbn, 30 tbc (default)
Metadata:
creation_time : 2016-11-03 20:11:08
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> libx264)
Press [q] to stop, [?] for help
[mp4 @ 0x21357e0] Starting second pass: moving the moov atom to the beginning of the file
frame= 280 fps=8.7 q=-1.0 Lsize= 1861kB time=00:00:09.33 bitrate=1633.7kbits/s
video:1859kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead 0.100889%
[libx264 @ 0x2139060] frame I:2 Avg QP:36.29 size: 46508
[libx264 @ 0x2139060] frame P:278 Avg QP:38.34 size: 6512
[libx264 @ 0x2139060] mb I I16..4: 75.4% 0.0% 24.6%
[libx264 @ 0x2139060] mb P I16..4: 0.5% 0.0% 0.2% P16..4: 18.6% 2.7% 1.8% 0.0% 0.0% skip:76.3%
[libx264 @ 0x2139060] coded y,uvDC,uvAC intra: 31.4% 22.8% 0.3% inter: 2.7% 1.1% 0.0%
[libx264 @ 0x2139060] i16 v,h,dc,p: 33% 28% 9% 30%
[libx264 @ 0x2139060] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 4% 4% 13% 17% 20% 14% 14% 8% 6%
[libx264 @ 0x2139060] i8c dc,h,v,p: 85% 7% 7% 1%
[libx264 @ 0x2139060] ref P L0: 77.6% 9.9% 8.2% 1.8% 2.5%
[libx264 @ 0x2139060] kb/s:1631.45
32.378 seconds to complete
Testando com a versão 4.0.2, o problema desapareceu, enquanto o seu agora é um pouco mais rápido, não chega nem perto da velocidade da configuração local, mas sim da CPU.
Eu só posso concluir que o que estava causando o slowdown era limitado a essa versão em particular - (4.0.1).
Embora esta não seja a resposta sobre qual foi a causa, uma vez que uma atualização de versão secundária corrige o problema, não vejo a dificuldade em tentar resolver a causa.
Tags virtualbox ffmpeg vmware transcode