Hi, sorry for the bad formatting in the previous emails, hopefully this should
be better, I have also attached the output log, just in case.I am downscaling
an HD movie from 1920x1080 to 720x576 and want to make sure the color
conversion is done correctly, which with my current settings I am sure it is
not. I am coming from an HD Prores HQ, going to an SD Prores HQ.With my current
command (below) it is introducing a very faint green pattern / interference, I
can see this when zooming into the video. If remove the colormatrix=bt709:bt601
altogether then the very faint green pattern / interference goes, bu the output
file is now brighter than the original, so isn't doing the 709 to 601
conversion. So my question is do I need any color conversion (is ffmpeg already
doing this for me) and if I do, what would be the correct way to apply this?
Here is my current command:
ffmpeg -r 25 -i "/Volumes/Original/TestInput.mov" -t 20 -af
atempo=1.04166666667 -map 0:0 -vf scale=720:576,colormatrix=bt709:bt601 -map
0:1 -map 0:2 -map 0:3 -map 0:4 -map 0:5 -map 0:6 -map 0:7 -vcodec prores
-profile:v 3 -c:a pcm_s16le -y "/Volumes/Done/TestOutput.mov"
And here is the output:ffmpeg -r 25 -i "/Volumes/Original/TestInput.mov" -t 20
-af atempo=1.04166666667 -map 0:0 -vf scale=720:576,colormatrix=bt709:bt601
-map 0:1 -map 0:2 -map 0:3 -map 0:4 -map 0:5 -map 0:6 -map 0:7 -vcodec prores
-profile:v 3 -c:a pcm_s16le -y "/Volumes/Done/TestOutput.mov"ffmpeg version
2.5.3-tessus Copyright (c) 2000-2015 the FFmpeg developers built on Jan 10
2015 01:19:50 with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM
3.5svn) configuration: --cc=/usr/bin/clang
--prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus
--disable-shared --enable-static --disable-ffplay --enable-gpl
--enable-pthreads --enable-postproc --enable-libmp3lame --enable-libtheora
--enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid
--enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libxavs --enable-libsoxr
--enable-libwavpack --enable-version3 --enable-libvo-aacenc
--enable-libvo-amrwbenc --enable-libvpx --enable-libgsm --enable-libopus
--enable-libmodplug --enable-fontconfig --enable-libfreetype --enable-libass
--enable-libbluray --enable-filters --disable-indev=qtkit
--disable-indev=x11grab_xcb --enable-runtime-cpudetect libavutil 54.
15.100 / 54. 15.100 libavcodec 56. 13.100 / 56. 13.100 libavformat 56.
15.102 / 56. 15.102 libavdevice 56. 3.100 / 56. 3.100 libavfilter 5.
2.103 / 5. 2.103 libswscale 3. 1.101 / 3. 1.101 libswresample 1.
1.100 / 1. 1.100 libpostproc 53. 3.100 / 53. 3.100Input #0,
mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/Original/TestInput.mov': Metadata:
major_brand : qt minor_version : 537199360 compatible_brands: qt
creation_time : 2014-12-23 17:56:48 Duration: 01:26:48.54, start:
0.000000, bitrate: 167427 kb/s Stream #0:0(eng): Video: prores (apch /
0x68637061), yuv422p10le(bt709), 1920x1080, 158160 kb/s, SAR 1:1 DAR 16:9, 24
fps, 24 tbr, 24 tbn, 24 tbc (default) Metadata: creation_time :
2014-12-23 17:56:48 handler_name : Apple Alias Data Handler
encoder : Apple ProRes 422 HQ timecode : 00:00:00:00
Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels
(FL), s32 (24 bit), 1152 kb/s (default) Metadata: creation_time :
2014-12-23 17:56:48 handler_name : Apple Alias Data Handler Stream
#0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32
(24 bit), 1152 kb/s (default) Metadata: creation_time : 2014-12-23
17:56:48 handler_name : Apple Alias Data Handler Stream #0:3(eng):
Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s
(default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler Stream #0:4(eng): Audio:
pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32 (24 bit), 1152
kb/s (default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler Stream #0:5(eng): Audio:
pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32 (24 bit), 1152
kb/s (default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler Stream #0:6(eng): Audio:
pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32 (24 bit), 1152
kb/s (default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler Stream #0:7(eng): Audio:
pcm_s24le (in24 / 0x34326E69), 48000 Hz, downmix, s32 (24 bit), 2304 kb/s
(default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler Stream #0:8(eng): Data: none
(tmcd / 0x64636D74) (default) Metadata: creation_time : 2014-12-23
18:06:00 handler_name : Apple Alias Data Handler timecode :
00:00:00:00Output #0, mov, to '/Volumes/Done/TestOutput.mov': Metadata:
major_brand : qt minor_version : 537199360 compatible_brands: qt
encoder : Lavf56.15.102 Stream #0:0(eng): Video: prores (apch)
(apch / 0x68637061), yuv422p10le, 720x576 [SAR 64:45 DAR 16:9], q=2-31, 200
kb/s, 25 fps, 12800 tbn, 25 tbc (default) Metadata: creation_time :
2014-12-23 17:56:48 handler_name : Apple Alias Data Handler
timecode : 00:00:00:00 encoder : Lavc56.13.100 prores
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels
(FL), s16 (24 bit), 768 kb/s (default) Metadata: creation_time :
2014-12-23 17:56:48 handler_name : Apple Alias Data Handler
encoder : Lavc56.13.100 pcm_s16le Stream #0:2(eng): Audio: pcm_s16le
(sowt / 0x74776F73), 48000 Hz, 1 channels (FR), s16 (24 bit), 768 kb/s
(default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler encoder : Lavc56.13.100
pcm_s16le Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
mono, s16 (24 bit), 768 kb/s (default) Metadata: creation_time :
2014-12-23 17:56:48 handler_name : Apple Alias Data Handler
encoder : Lavc56.13.100 pcm_s16le Stream #0:4(eng): Audio: pcm_s16le
(sowt / 0x74776F73), 48000 Hz, 1 channels (LFE), s16 (24 bit), 768 kb/s
(default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler encoder : Lavc56.13.100
pcm_s16le Stream #0:5(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
1 channels (BL), s16 (24 bit), 768 kb/s (default) Metadata:
creation_time : 2014-12-23 17:56:48 handler_name : Apple Alias Data
Handler encoder : Lavc56.13.100 pcm_s16le Stream #0:6(eng):
Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (BR), s16 (24 bit),
768 kb/s (default) Metadata: creation_time : 2014-12-23 17:56:48
handler_name : Apple Alias Data Handler encoder : Lavc56.13.100
pcm_s16le Stream #0:7(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz,
downmix, s16 (24 bit), 1536 kb/s (default) Metadata: creation_time :
2014-12-23 17:56:48 handler_name : Apple Alias Data Handler
encoder : Lavc56.13.100 pcm_s16leStream mapping: Stream #0:0 -> #0:0
(prores (native) -> prores (native)) Stream #0:1 -> #0:1 (pcm_s24le (native)
-> pcm_s16le (native)) Stream #0:2 -> #0:2 (pcm_s24le (native) -> pcm_s16le
(native)) Stream #0:3 -> #0:3 (pcm_s24le (native) -> pcm_s16le (native))
Stream #0:4 -> #0:4 (pcm_s24le (native) -> pcm_s16le (native)) Stream #0:5 ->
#0:5 (pcm_s24le (native) -> pcm_s16le (native)) Stream #0:6 -> #0:6 (pcm_s24le
(native) -> pcm_s16le (native)) Stream #0:7 -> #0:7 (pcm_s24le (native) ->
pcm_s16le (native))Press [q] to stop, [?] for helpframe= 500 fps= 46 q=0.0
Lsize= 101594kB time=00:00:20.00 bitrate=41613.0kbits/s
video:86555kB audio:15000kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.038209%
{\rtf1\ansi\ansicpg1252\cocoartf1343\cocoasubrtf160
{\fonttbl\f0\fnil\fcharset0 Calibri;}
{\colortbl;\red255\green255\blue255;\red0\green0\blue0;}
\paperw11900\paperh16840\margl1440\margr1440\vieww23840\viewh13520\viewkind0
\deftab720
\pard\pardeftab720
\f0\fs32 \cf2 \expnd0\expndtw0\kerning0
\outl0\strokewidth0 \strokec2 ffmpeg -r 25 -i\'a0"/Volumes/Original/TestInput.mov"\'a0-t 20 -af atempo=1.04166666667 -map 0:0 -vf scale=720:576,colormatrix=bt709:bt601 -map 0:1 -map 0:2 -map 0:3 -map 0:4 -map 0:5 -map 0:6 -map 0:7 -vcodec prores -profile:v 3 -c:a pcm_s16le -y\'a0"/Volumes/Done/TestOutput.mov"\
ffmpeg version 2.5.3-tessus Copyright (c) 2000-2015 the FFmpeg developers\
\'a0 built on Jan 10 2015 01:19:50 with Apple LLVM version 6.0 (clang-600.0.56) (based on LLVM 3.5svn)\
\'a0 configuration: --cc=/usr/bin/clang --prefix=/Users/tessus/data/ext/ffmpeg/sw --as=yasm --extra-version=tessus --disable-shared --enable-static --disable-ffplay --enable-gpl --enable-pthreads --enable-postproc --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-libspeex --enable-bzlib --enable-zlib --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libxavs --enable-libsoxr --enable-libwavpack --enable-version3 --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvpx --enable-libgsm --enable-libopus --enable-libmodplug --enable-fontconfig --enable-libfreetype --enable-libass --enable-libbluray --enable-filters --disable-indev=qtkit --disable-indev=x11grab_xcb --enable-runtime-cpudetect\
\'a0 libavutil\'a0 \'a0 \'a0 54. 15.100 / 54. 15.100\
\'a0 libavcodec \'a0 \'a0 56. 13.100 / 56. 13.100\
\'a0 libavformat\'a0 \'a0 56. 15.102 / 56. 15.102\
\'a0 libavdevice\'a0 \'a0 56.\'a0 3.100 / 56.\'a0 3.100\
\'a0 libavfilter \'a0 \'a0 5.\'a0 2.103 /\'a0 5.\'a0 2.103\
\'a0 libswscale\'a0 \'a0 \'a0 3.\'a0 1.101 /\'a0 3.\'a0 1.101\
\'a0 libswresample \'a0 1.\'a0 1.100 /\'a0 1.\'a0 1.100\
\'a0 libpostproc\'a0 \'a0 53.\'a0 3.100 / 53.\'a0 3.100\
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/Original/TestInput.mov':\
\'a0 Metadata:\
\'a0 \'a0 major_brand \'a0 \'a0 : qt \'a0\
\'a0 \'a0 minor_version \'a0 : 537199360\
\'a0 \'a0 compatible_brands: qt \'a0\
\'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 Duration: 01:26:48.54, start: 0.000000, bitrate: 167427 kb/s\
\'a0 \'a0 Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709), 1920x1080, 158160 kb/s, SAR 1:1 DAR 16:9, 24 fps, 24 tbr, 24 tbn, 24 tbc (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Apple ProRes 422 HQ\
\'a0 \'a0 \'a0 timecode\'a0 \'a0 \'a0 \'a0 : 00:00:00:00\
\'a0 \'a0 Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FL), s32 (24 bit), 1152 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (FR), s32 (24 bit), 1152 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 Stream #0:4(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (LFE), s32 (24 bit), 1152 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 Stream #0:5(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BL), s32 (24 bit), 1152 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 Stream #0:6(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels (BR), s32 (24 bit), 1152 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 Stream #0:7(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, downmix, s32 (24 bit), 2304 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 Stream #0:8(eng): Data: none (tmcd / 0x64636D74) (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 18:06:00\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 timecode\'a0 \'a0 \'a0 \'a0 : 00:00:00:00\
Output #0, mov, to '/Volumes/Done/TestOutput.mov':\
\'a0 Metadata:\
\'a0 \'a0 major_brand \'a0 \'a0 : qt \'a0\
\'a0 \'a0 minor_version \'a0 : 537199360\
\'a0 \'a0 compatible_brands: qt \'a0\
\'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavf56.15.102\
\'a0 \'a0 Stream #0:0(eng): Video: prores (apch) (apch / 0x68637061), yuv422p10le, 720x576 [SAR 64:45 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 timecode\'a0 \'a0 \'a0 \'a0 : 00:00:00:00\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 prores\
\'a0 \'a0 Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (FL), s16 (24 bit), 768 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 pcm_s16le\
\'a0 \'a0 Stream #0:2(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (FR), s16 (24 bit), 768 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 pcm_s16le\
\'a0 \'a0 Stream #0:3(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16 (24 bit), 768 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 pcm_s16le\
\'a0 \'a0 Stream #0:4(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (LFE), s16 (24 bit), 768 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 pcm_s16le\
\'a0 \'a0 Stream #0:5(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (BL), s16 (24 bit), 768 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 pcm_s16le\
\'a0 \'a0 Stream #0:6(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, 1 channels (BR), s16 (24 bit), 768 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 pcm_s16le\
\'a0 \'a0 Stream #0:7(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, downmix, s16 (24 bit), 1536 kb/s (default)\
\'a0 \'a0 Metadata:\
\'a0 \'a0 \'a0 creation_time \'a0 : 2014-12-23 17:56:48\
\'a0 \'a0 \'a0 handler_name\'a0 \'a0 : Apple Alias Data Handler\
\'a0 \'a0 \'a0 encoder \'a0 \'a0 \'a0 \'a0 : Lavc56.13.100 pcm_s16le\
Stream mapping:\
\'a0 Stream #0:0 -> #0:0 (prores (native) -> prores (native))\
\'a0 Stream #0:1 -> #0:1 (pcm_s24le (native) -> pcm_s16le (native))\
\'a0 Stream #0:2 -> #0:2 (pcm_s24le (native) -> pcm_s16le (native))\
\'a0 Stream #0:3 -> #0:3 (pcm_s24le (native) -> pcm_s16le (native))\
\'a0 Stream #0:4 -> #0:4 (pcm_s24le (native) -> pcm_s16le (native))\
\'a0 Stream #0:5 -> #0:5 (pcm_s24le (native) -> pcm_s16le (native))\
\'a0 Stream #0:6 -> #0:6 (pcm_s24le (native) -> pcm_s16le (native))\
\'a0 Stream #0:7 -> #0:7 (pcm_s24le (native) -> pcm_s16le (native))\
Press [q] to stop, [?] for help\
frame=\'a0 500 fps= 46 q=0.0 Lsize=\'a0 101594kB time=00:00:20.00 bitrate=41613.0kbits/s \'a0 \'a0\
\
video:86555kB audio:15000kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.038209%\
}
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