igardais at yahoo.fr
Sun Dec 22 11:42:38 CET 2013
Le 22 déc. 2013 à 08:00, Paul B Mahol <onemda at gmail.com> a écrit :
> On Sat, Dec 21, 2013 at 8:27 PM, Ionel GARDAIS <igardais at yahoo.fr> wrote:
>> Hi list,
>> Has anyone succeeded in making a CD-DTS (a.k.a. DTS Audio CD a.k.a. 5.1
>> Music Disc) ?
>> I'm desperately trying to find the right combination of options to create
>> a valid, burnable wave file that spits DTS on my receiver.
>> Unfortunately, all I get is white noise.
>> The key seems to pack a DTS flow inside a classic 2-channel, 44100Hz,
>> PCM-declared WAV container.
>> $ ./ffmpeg -i input.aac -acodec dts -strict -2 -ar 44100 dts-output.wav
>> creates a 6-channel wav container for the DTS datas and
>> $ ./ffmpeg -i input.aac -acodec dts -strict -2 -ar 44100 -ac 2
>> downmix the 5.1 aac input to a 2-channel wav file
>> I tried to bit-bang the dts-output.wav so the wav container is declared as
>> wanted but it fails.
>> The file at http://www.lamoateffe.com/samples/RedHouseDTS.wav is a valid
>> wav-packed DTS file.
>> Any advice welcomed.
> For start what version are you using?
I'm using a daily build version :
ffmpeg version N-59266-gd1b8e01
built on Dec 21 2013 13:21:23 with Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
configuration: --disable-yasm --enable-opencl --enable-openssl --enable-pic --enable-avresample --enable-shared --enable-libmp3lame --extra-cflags='-I /usr/local/include' --extra-ldflags='-L /usr/local/lib'
libavutil 52. 58.101 / 52. 58.101
libavcodec 55. 45.103 / 55. 45.103
libavformat 55. 22.100 / 55. 22.100
libavdevice 55. 5.102 / 55. 5.102
libavfilter 4. 0.100 / 4. 0.100
libavresample 1. 1. 0 / 1. 1. 0
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
I gave the rcaenc encoder a try : byte ordering is different, content is different but headers look the same.
I created a dca file with dcaenc using the folowing sequence :
$ ./ffmpeg -i input.aac -acodec pcm_s16le -ar 44100 test.pcm.44100.wav
$ ./dcaenc test.pcm.44100.wav test.dcaenc.dts 1411200
The ffmpeg dca file was created like this :
$ ./ffmpeg -i input.aac -acodec dts -ar 44100 -strict -2 test.dts.44100.dts
Here are the tests results :
- plain dcaenc file burned with cdrecord '-audio -pad -swab' => DTS is OK on receiver, music plays, file cannot be read on VLC
- plain ffmpeg dts file burned with cdrecord '-audio -pad' => DTS is OK on receiver, SILENCE plays, file cannot be read on VLC
- dcaenc file, packed in a wav file with Carl's command and burned with cdrecord '-audio -pad' (no -swab here) => DTS is OK on receiver, music plays, file cannot be read on VLC
- ffmpeg dts, packed in a wav file with Carl's command and burned with cdrecord '-audio -pad' => no DTS, noise on receiver, file cannot be read on VLC
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