on the FLY AAC to DD AC3 re-encode

**itsmydamnation** · 09-09-2011, 05:48 PM

i would love an option (that could be selected on a per device basis) to enable on the fly re-encoding off just the audio if it is in AAC and re-encode it to DD AC3 5.1 . the reason, pretty much all samsung TV's will do DD AC3 5.1 over optical to an AV receiver / amp but not AAC. otherwise i will have to trans-code a lot of existing files.

personally i think that would be a pretty cool advantage over other DLNA servers.

cheers

**Paul** · 09-09-2011, 05:56 PM

Mezzmo already does that (remuxing), if the video stream is deemed compatible with the device (as per the device profile). This is much quicker and less CPU-intensive than a full transcode.

**itsmydamnation** · 09-09-2011, 05:58 PM

more info on it?how to enable etc? i have AAC that doesn't seem to be changed to AAC

**Paul** · 09-09-2011, 05:59 PM

It depends on the device profile and your file. Please send in FFmpeg information on the file (in Mezzmo right-click on the file and use the "Get FFmpeg Information" command) and also the device profile that's used and we'll see how it matches up.

**itsmydamnation** · 09-09-2011, 06:06 PM

Code:

ffmpeg version N-32348-g6dbac85, Copyright (c) 2000-2011 the FFmpeg developers
  built on Sep  6 2011 16:03:56 with gcc 4.4.2
  configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
  libavutil    51. 16. 0 / 51. 16. 0
  libavcodec   53. 13. 0 / 53. 13. 0
  libavformat  53. 11. 0 / 53. 11. 0
  libavdevice  53.  3. 0 / 53.  3. 0
  libavfilter   2. 37. 0 /  2. 37. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[matroska,webm @ 003f8c60] max_analyze_duration 5000000 reached at 5019000
[matroska,webm @ 003f8c60] Estimating duration from bitrate, this may be inaccurate
Input #0, matroska,webm, from 'D:\TV shows\ghost in the shell\S.A.C. 2nd GIG \ Ghost in the Shell S.A.C. 2nd GIG E01.mkv':
  Duration: 00:24:32.37, start: 0.000000, bitrate: N/A
    Chapter #0.0: start 0.000000, end 92.019000
    Metadata:
      title           : Opening
    Chapter #0.1: start 92.019000, end 749.092000
    Metadata:
      title           : Part 1
    Chapter #0.2: start 749.092000, end 1382.099000
    Metadata:
      title           : Part 2
    Chapter #0.3: start 1382.099000, end 1472.370000
    Metadata:
      title           : Ending
    Stream #0.0(jpn): Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Metadata:
      title           : Episode 01 - Reembody
    Stream #0.1(eng): Audio: aac, 48000 Hz, 5.1, s16 (default)
    Metadata:
      title           : English Dolby Digital 5.1ch AAC
    Stream #0.2(jpn): Audio: aac, 48000 Hz, 5.1, s16
    Metadata:
      title           : Japanese Dolby Digital 5.1ch AAC
    Stream #0.3(eng): Subtitle: ssa (default)
    Metadata:
      title           : English Lyrics/Signs
    Stream #0.4(eng): Subtitle: ssa
    Metadata:
      title           : English Subtitles
    Stream #0.5: Attachment: ttf
    Metadata:
      filename        : Androgyne_TB.otf
    Stream #0.6: Attachment: ttf
    Metadata:
      filename        : BellGothicStd-Black.otf
    Stream #0.7: Attachment: ttf
    Metadata:
      filename        : BellGothicStd-Bold.otf
    Stream #0.8: Attachment: ttf
    Metadata:
      filename        : Brianne_s_hand.ttf
    Stream #0.9: Attachment: ttf
    Metadata:
      filename        : ITCKabelStd-Medium.otf
    Stream #0.10: Attachment: ttf
    Metadata:
      filename        : kkberktp.ttf
    Stream #0.11: Attachment: ttf
    Metadata:
      filename        : POORICH.TTF
    Stream #0.12: Attachment: ttf
    Metadata:
      filename        : Sony_Sketch_EF.ttf
    Stream #0.13: Attachment: ttf
    Metadata:
      filename        : X-SCALE.TTF
    Stream #0.14: Attachment: ttf
    Metadata:
      filename        : YOUTHAN_.ttf
    Stream #0.15: Attachment: ttf
    Metadata:
      filename        : YOUTHANI.ttf
    Stream #0.16: Attachment: ttf
    Metadata:
      filename        : YOUTTX__.ttf
At least one output file must be specified


---> DB Level Info: 41, 100
---> Frame rate: 23.98
---> Aspect ratio: 16:9

using Samsung C on a PS50C6500 on mezzmo 2.4.3, on the TV i can only set PCM for audio out

one like this with AC3 as the encode, i can select DD

Code:

ffmpeg version N-32348-g6dbac85, Copyright (c) 2000-2011 the FFmpeg developers
  built on Sep  6 2011 16:03:56 with gcc 4.4.2
  configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
  libavutil    51. 16. 0 / 51. 16. 0
  libavcodec   53. 13. 0 / 53. 13. 0
  libavformat  53. 11. 0 / 53. 11. 0
  libavdevice  53.  3. 0 / 53.  3. 0
  libavfilter   2. 37. 0 /  2. 37. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[matroska,webm @ 003f8c60] Estimating duration from bitrate, this may be inaccurate
Input #0, matroska,webm, from 'D:\TV shows\stargate Universe\Stargate.Universe.S02E18.720p.HDTV.X264-DIMENSION.mkv':
  Duration: 00:42:40.09, start: 0.000000, bitrate: 384 kb/s
    Stream #0.0(eng): Video: h264 (High), yuv420p, 1280x720, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc
    Stream #0.1: Audio: ac3, 48000 Hz, stereo, s16, 384 kb/s (default)
At least one output file must be specified


---> DB Level Info: 41, 100
---> Frame rate: 23.98
---> Aspect ratio: 16:9

cheers

edit: im about to test by re-encoding the first file as the second one is only 2.0

**itsmydamnation** · 09-09-2011, 09:02 PM

ok, i have re-encoded as 5.1 AC3 and tested and it works fine, ie i can choose DD as the optical output

Code:

ffmpeg version N-32348-g6dbac85, Copyright (c) 2000-2011 the FFmpeg developers
  built on Sep  6 2011 16:03:56 with gcc 4.4.2
  configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
  libavutil    51. 16. 0 / 51. 16. 0
  libavcodec   53. 13. 0 / 53. 13. 0
  libavformat  53. 11. 0 / 53. 11. 0
  libavdevice  53.  3. 0 / 53.  3. 0
  libavfilter   2. 37. 0 /  2. 37. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[matroska,webm @ 003f8c80] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 47.95 (5000000/104271) -> 23.98 (24000/1001)
Input #0, matroska,webm, from 'D:\TV shows\ghost in the shell\Ghost in the Shell S.A.C. 2nd GIG E01.mkv':
  Duration: 00:24:32.22, start: 0.000000, bitrate: 384 kb/s
    Stream #0.0: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Stream #0.1: Audio: ac3, 44100 Hz, 5.1(side), s16, 384 kb/s (default)
At least one output file must be specified


---> DB Level Info: 41, 100
---> Frame rate: 23.98
---> Aspect ratio: 16:9

**itsmydamnation** · 09-11-2011, 01:11 PM

Originally Posted by itsmydamnation

ok, i have re-encoded as 5.1 AC3 and tested and it works fine, ie i can choose DD as the optical output

Code:

ffmpeg version N-32348-g6dbac85, Copyright (c) 2000-2011 the FFmpeg developers
  built on Sep  6 2011 16:03:56 with gcc 4.4.2
  configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
  libavutil    51. 16. 0 / 51. 16. 0
  libavcodec   53. 13. 0 / 53. 13. 0
  libavformat  53. 11. 0 / 53. 11. 0
  libavdevice  53.  3. 0 / 53.  3. 0
  libavfilter   2. 37. 0 /  2. 37. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[matroska,webm @ 003f8c80] Estimating duration from bitrate, this may be inaccurate

Seems stream 0 codec frame rate differs from container frame rate: 47.95 (5000000/104271) -> 23.98 (24000/1001)
Input #0, matroska,webm, from 'D:\TV shows\ghost in the shell\Ghost in the Shell S.A.C. 2nd GIG E01.mkv':
  Duration: 00:24:32.22, start: 0.000000, bitrate: 384 kb/s
    Stream #0.0: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Stream #0.1: Audio: ac3, 44100 Hz, 5.1(side), s16, 384 kb/s (default)
At least one output file must be specified


---> DB Level Info: 41, 100
---> Frame rate: 23.98
---> Aspect ratio: 16:9

i know this is now in the wrong section and its also the weekend :P , but any word? ( if you guys work mon to fri, i'll just wait till tomorrow afternoon before bugging or anything

)

**Paul** · 09-12-2011, 09:50 AM

Yes, we only work Monday to Friday

That file will be passed through natively using the "Samsung C" device profile. That same profile will remux 5.1 AAC in an MP4 container to AC3, so perhaps if the TV cannot play 5.1 AAC (it should play stereo AAC in MKV though), then we can recode 5.1 AAC to 5.1 AC3, while leaving 2-channel AAC untouched. Do you have any MKVs with stereo AAC to test?

**itsmydamnation** · 09-12-2011, 01:39 PM

Originally Posted by Dennis

Yes, we only work Monday to Friday

That file will be passed through natively using the "Samsung C" device profile. That same profile will remux 5.1 AAC in an MP4 container to AC3, so perhaps if the TV cannot play 5.1 AAC (it should play stereo AAC in MKV though), then we can recode 5.1 AAC to 5.1 AC3, while leaving 2-channel AAC untouched. Do you have any MKVs with stereo AAC to test?

i will have to check when i get home, if i dont i will just hack up a two channel AAC video by re-encoding DD5.1/DTS/AAC5.1 down to 2 channel AAC. so long as its in an mkv container its very quick to put it all back together thanks to mkvtools. i think 2 channel AAC will play fine as the audio in the 5.1 channel AAC itself plays fine on the TV but will only output in 2 channel PCM over the TOSLINK.

**itsmydamnation** · 09-12-2011, 07:10 PM

Code:

ffmpeg version N-32348-g6dbac85, Copyright (c) 2000-2011 the FFmpeg developers
  built on Sep  6 2011 16:03:56 with gcc 4.4.2
  configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
  libavutil    51. 16. 0 / 51. 16. 0
  libavcodec   53. 13. 0 / 53. 13. 0
  libavformat  53. 11. 0 / 53. 11. 0
  libavdevice  53.  3. 0 / 53.  3. 0
  libavfilter   2. 37. 0 /  2. 37. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[matroska,webm @ 003f8c60] Estimating duration from bitrate, this may be inaccurate
Input #0, matroska,webm, from 'F:\videos\music\metallica-magnetic_tour_2009_live_at_arenes_de_nimes-x264-2009-pmv.mkv':
  Duration: 01:34:55.28, start: 0.000000, bitrate: 384 kb/s
    Stream #0.0(eng): Video: h264 (Main), yuv420p, 688x368 [SAR 203:211 DAR 8729:4853], SAR 184:191 DAR 344:191, 25 fps, 25 tbr, 1k tbn, 50 tbc (default)
    Stream #0.1: Audio: ac3, 48000 Hz, stereo, s16, 384 kb/s (default)
At least one output file must be specified


---> DB Level Info: 30, 77
---> Frame rate: 25.00
---> Aspect ratio: 344:191

this gets converted to DD????

whoops, my mistake.....lol... left me find something thats AAC not DD/ac3...lol

edit:
i had to create this myself, it plays as PCM only out the TOSLINK

Code:

ffmpeg version N-32348-g6dbac85, Copyright (c) 2000-2011 the FFmpeg developers
  built on Sep  6 2011 16:03:56 with gcc 4.4.2
  configuration: --enable-memalign-hack --arch=x86 --target-os=mingw32 --cross-prefix=i686-mingw32- --enable-static --disable-shared --enable-zlib --disable-ffplay --prefix=/media/windows/ffmpeg --enable-libmp3lame --enable-libx264 --enable-gpl --extra-libs='-lx264 -lpthread' --enable-runtime-cpudetect --pkg-config=pkg-config
  libavutil    51. 16. 0 / 51. 16. 0
  libavcodec   53. 13. 0 / 53. 13. 0
  libavformat  53. 11. 0 / 53. 11. 0
  libavdevice  53.  3. 0 / 53.  3. 0
  libavfilter   2. 37. 0 /  2. 37. 0
  libswscale    2.  1. 0 /  2.  1. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[matroska,webm @ 003f8c60] max_analyze_duration 5000000 reached at 5040000
[matroska,webm @ 003f8c60] Estimating duration from bitrate, this may be inaccurate
Input #0, matroska,webm, from 'D:\TV shows\[OZC] Ghost in the Shell S.A.C. 2nd GIG E11 _Affection_ [Blu-Ray 1080p] (1).mkv':
  Duration: 00:24:31.27, start: 0.000000, bitrate: N/A
    Stream #0.0: Video: h264 (High), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Metadata:
      title           : Episode 11 - Affection
    Stream #0.1: Audio: aac, 48000 Hz, stereo, s16 (default)
    Stream #0.2: Attachment: ttf
    Metadata:
      filename        : Androgyne_TB.otf
    Stream #0.3: Attachment: ttf
    Metadata:
      filename        : BellGothicStd-Black.otf
    Stream #0.4: Attachment: ttf
    Metadata:
      filename        : BellGothicStd-Bold.otf
    Stream #0.5: Attachment: ttf
    Metadata:
      filename        : Brianne_s_hand.ttf
    Stream #0.6: Attachment: ttf
    Metadata:
      filename        : ITCKabelStd-Medium.otf
    Stream #0.7: Attachment: ttf
    Metadata:
      filename        : kkberktp.ttf
    Stream #0.8: Attachment: ttf
    Metadata:
      filename        : POORICH.TTF
    Stream #0.9: Attachment: ttf
    Metadata:
      filename        : Sony_Sketch_EF.ttf
    Stream #0.10: Attachment: ttf
    Metadata:
      filename        : X-SCALE.TTF
    Stream #0.11: Attachment: ttf
    Metadata:
      filename        : YOUTHAN_.ttf
    Stream #0.12: Attachment: ttf
    Metadata:
      filename        : YOUTHANI.ttf
    Stream #0.13: Attachment: ttf
    Metadata:
      filename        : YOUTTX__.ttf
At least one output file must be specified


---> DB Level Info: 41, 100
---> Frame rate: 23.98
---> Aspect ratio: 16:9

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