On 10/20/2015 2:30 PM, Kevin Wells wrote:
From: [email protected]
To: [email protected]
Date: Tue, 20 Oct 2015 20:14:31 +0000
Subject: [FFmpeg-user] Channel layout flags

Hi, I posted this incorrectly on the dev list, so posting in the correct place 
with corrections.
I am looking for a patch, or solution, to my problem. When using the below 
Channel layout flags, in the resulting Quicktime Prores file, in the audio 
channels, the FC, DL and DR all come out flagged as 'Mono', but I would like 
these flagged as 'Center', 'Left Total' and 'Right Total'. Is there a patch / 
command / flag to get these flagged to how I label them please?

Here is my current command:

ffmpeg -i /Volumes/GRAID/EXPORTS/DESCRETE_TEST.mov -ss 45 -to 50 
-filter_complex \
"[0:1]pan=FL|c0=c0[FL]; \
  [0:1]pan=FR|c0=c1[FR]; \
  [0:1]pan=FC|c0=c2[FC]; \
  [0:1]pan=LFE|c0=c3[LFE]; \
  [0:1]pan=BL|c0=c4[BL]; \
  [0:1]pan=BR|c0=c5[BR]; \
  [0:1]pan=DL|c0=c6[DL]; \
  [0:1]pan=DR|c0=c7[DR]" \
-map v:0 \
-map "[FL]" \
-map "[FR]" \
-map "[FC]" \
-map "[LFE]" \
-map "[BL]" \
-map "[BR]" \
-map "[DL]" \
-map "[DR]" \
-vcodec prores -profile:v 3 -vtag apcn -f mov -y -c:a pcm_s24le 
/Volumes/GRAID/EXPORTS/DONE_TEST.mov

When viewing the result in Quicktime player, they are displayed as:

Video
Front Left
Front Right
Mono (would like it to be Center)
Left Surround
Right Surround
Mono (would like it to be Left Total)
Mono (would like it to be Right Total)
Below is the ffmpeg output.

ffmpeg -i /Volumes/GRAID/EXPORTS/DESCRETE_TEST.mov -ss 45 -to 50 
-filter_complex \
"[0:1]pan=FL|c0=c0[FL]; \
  [0:1]pan=FR|c0=c1[FR]; \
  [0:1]pan=FC|c0=c2[FC]; \
  [0:1]pan=LFE|c0=c3[LFE]; \
  [0:1]pan=BL|c0=c4[BL]; \
  [0:1]pan=BR|c0=c5[BR]; \
  [0:1]pan=DL|c0=c6[DL]; \
  [0:1]pan=DR|c0=c7[DR]" \
-map v:0 \
-map "[FL]" \
-map "[FR]" \
-map "[FC]" \
-map "[LFE]" \
-map "[BL]" \
-map "[BR]" \
-map "[DL]" \
-map "[DR]" \
-vcodec prores -profile:v 3 -vtag apcn -f mov -y -c:a pcm_s24le 
/Volumes/GRAID/EXPORTS/DONE_TEST.mov
ffmpeg version 2.8.1-tessus Copyright (c) 2000-2015 the FFmpeg developers
   built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
   configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --as=yasm 
--extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl 
--enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm 
--enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb 
--enable-libopencore-amrwb --enable-libopus --enable-libschroedinger 
--enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab 
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis 
--enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 
--enable-libxavs --enable-libxvid --enable-libzmq --enable-version3 
--disable-ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
   libavutil      54. 31.100 / 54. 31.100
   libavcodec     56. 60.100 / 56. 60.100
   libavformat    56. 40.101 / 56. 40.101
   libavdevice    56.  4.100 / 56.  4.100
   libavfilter     5. 40.101 /  5. 40.101
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  2.101 /  1.  2.101
   libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 
'/Volumes/GRAID/EXPORTS/DESCRETE_TEST.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 537199360
     compatible_brands: qt
     creation_time   : 2015-10-20 14:25:55
   Duration: 00:01:37.08, start: 0.000000, bitrate: 160894 kb/s
     Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le, 
1920x1080, 151675 kb/s, 24 fps, 24 tbr, 24 tbn, 24 tbc (default)
     Metadata:
       creation_time   : 2015-10-20 14:25:55
       handler_name    : Apple Alias Data Handler
       encoder         : Apple ProRes 422 HQ
     Stream #0:1(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 8 
channels (FL+FR+FC+LFE+SL+SR+DL+DR), s32 (24 bit), 9216 kb/s (default)
     Metadata:
       creation_time   : 2015-10-20 14:28:55
       handler_name    : Apple Alias Data Handler
[Parsed_pan_7 @ 0x7fe7d1e05dc0] Pure channel mapping detected: 7
[Parsed_pan_6 @ 0x7fe7d1e05b60] Pure channel mapping detected: 6
[Parsed_pan_5 @ 0x7fe7d1e05860] Pure channel mapping detected: 5
[Parsed_pan_4 @ 0x7fe7d1e05580] Pure channel mapping detected: 4
[Parsed_pan_3 @ 0x7fe7d1e05280] Pure channel mapping detected: 3
[Parsed_pan_2 @ 0x7fe7d1e04f80] Pure channel mapping detected: 2
[Parsed_pan_1 @ 0x7fe7d1e04ba0] Pure channel mapping detected: 1
[Parsed_pan_0 @ 0x7fe7d1e048c0] Pure channel mapping detected: 0
Output #0, mov, to '/Volumes/GRAID/EXPORTS/DONE_TEST.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 537199360
     compatible_brands: qt
     encoder         : Lavf56.40.101
     Stream #0:0(eng): Video: prores (apch) (apch / 0x68637061), yuv422p10le, 
1920x1080, q=2-31, 200 kb/s, 24 fps, 12288 tbn, 24 tbc (default)
     Metadata:
       creation_time   : 2015-10-20 14:25:55
       handler_name    : Apple Alias Data Handler
       encoder         : Lavc56.60.100 prores
     Stream #0:1: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels 
(FL), s32, 1152 kb/s (default)
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
     Stream #0:2: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels 
(FR), s32, 1152 kb/s
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
     Stream #0:3: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32, 
1152 kb/s
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
     Stream #0:4: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels 
(LFE), s32, 1152 kb/s
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
     Stream #0:5: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels 
(BL), s32, 1152 kb/s
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
     Stream #0:6: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels 
(BR), s32, 1152 kb/s
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
     Stream #0:7: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels 
(DL), s32, 1152 kb/s
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
     Stream #0:8: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels 
(DR), s32, 1152 kb/s
     Metadata:
       encoder         : Lavc56.60.100 pcm_s24le
Stream mapping:
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:1 (pcm_s24le) -> pan (graph 0)
   Stream #0:0 -> #0:0 (prores (native) -> prores (native))
   pan (graph 0) -> Stream #0:1 (pcm_s24le)
   pan (graph 0) -> Stream #0:2 (pcm_s24le)
   pan (graph 0) -> Stream #0:3 (pcm_s24le)
   pan (graph 0) -> Stream #0:4 (pcm_s24le)
   pan (graph 0) -> Stream #0:5 (pcm_s24le)
   pan (graph 0) -> Stream #0:6 (pcm_s24le)
   pan (graph 0) -> Stream #0:7 (pcm_s24le)
   pan (graph 0) -> Stream #0:8 (pcm_s24le)
Press [q] to stop, [?] for help
[pcm_s24le @ 0x7fe7d3007c00] not writing 'chan' tag due to lack of channel 
information
[pcm_s24le @ 0x7fe7d3010a00] not writing 'chan' tag due to lack of channel 
information
frame=  120 fps=7.4 q=-0.0 Lsize=  129110kB time=00:00:05.00 
bitrate=211534.5kbits/s
video:123470kB audio:5625kB subtitle:0kB other streams:0kB global headers:0kB 
muxing overhead: 0.011760%

                                        
_______________________________________________
I had a small command line tool written for this exact purpose, since we're only talking about metadata it isn't difficult to manipulate after the fact. Apple has this fairly well documented too. Its a shame FFmpeg can't handle it directly!

I found that exactly the same thing has been reported 2 years ago, this is 
precisely my current issue.

https://trac.ffmpeg.org/ticket/2865#comment:9                                   
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