ffmpeg syntax

[maxmercy]

Can be used to decode the track but can't be used by eac3to until madshi can parse the track and add new libav dll's.

By the moment you can do, for instance:

ffmpeg -i 000000.m2ts -map 0:1 recoded.flac

What would be the ffmpeg command line to convert to a 24bit, 48kHz .w64 file?

JSS

[tebasuna51]

Precedent post moved from eac3to thread to avoid Off Topic in that thread.

Please read the ffmpeg doc's here (https://www.ffmpeg.org/documentation.html)

Or the ffmpeg help with:

ffmpeg -h

[pandy]

something like this?

@ffmpeg -i %1 -map 0:a:0 -c:a pcm_s24le -af aresample=resampler=soxr:osr=48000:cutoff=0.99:dither_method=0 %1.w64

[Overdrive80]

Which are features of audio source??

[tebasuna51]

We are speaking about decode/recode the TrueHD Atmos 7.1 24 bits 48 KHz from last Tranformers movie.

[pandy]

We are speaking about decode/recode the TrueHD Atmos 7.1 24 bits 48 KHz from last Tranformers movie.

Wow, impressive, which model of crystal ball you currently use? :cool:

[tebasuna51]

Wow, impressive, which model of crystal ball you currently use? :cool:

Read my second post and the eac3to thread.

[serie]

This is much simpler. Extract the TrueHD Atmos stream to a multi-channel wav via ffmpeg, and then run that wav through eac3to to dts or whatever.
ffmpeg -i 00000.m2ts -map 0:1 extract.wav
eac3to extract.wav extract.dts

I have tried this method but something is not working well, i get errors :

[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 26

F:\ffmpeg-20150126-git-f994000-win32-static\bin>ffmpeg.exe -i D:\BDMV\STREAM\00000.m2ts -map 0:1 extract.wav
ffmpeg version N-69258-gf994000 Copyright (c) 2000-2015 the FFmpeg developers built on Jan 25 2015 22:03:00 with gcc 4.9.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib
modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw
b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge
r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --en
able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enab
le-zlib
libavutil 54. 17.100 / 54. 17.100
libavcodec 56. 20.100 / 56. 20.100
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 9.100 / 5. 9.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[NULL @ 033ce080] start time for stream 4 is not set in estimate_timings_from_pt
s
[NULL @ 033ce780] start time for stream 5 is not set in estimate_timings_from_pt
s
[NULL @ 033cee80] start time for stream 6 is not set in estimate_timings_from_pt
s
[mpegts @ 02eca080] Could not find codec parameters for stream 4 (Subtitle: hdmv
_pgs_subtitle ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 02eca080] Could not find codec parameters for stream 5 (Subtitle: hdmv
_pgs_subtitle ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[mpegts @ 02eca080] Could not find codec parameters for stream 6 (Subtitle: hdmv
_pgs_subtitle ([144][0][0][0] / 0x0090)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from 'D:\BDMV\STREAM\00000.m2ts':
Duration: 01:41:12.93, start: 11.650667, bitrate: 42750 kb/s
Program 1
Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1920x1
080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
Stream #0:1[0x1100]: Audio: truehd (AC-3 / 0x332D4341), 48000 Hz, 7.1, s32 (
24 bit)
Stream #0:2[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fl
tp, 640 kb/s
Stream #0:3[0x1101]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), fl
tp, 640 kb/s
Stream #0:4[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:5[0x1201]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Stream #0:6[0x1202]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090)
Output #0, wav, to 'extract.wav':
Metadata:
ISFT : Lavf56.19.100
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, 7.1, s16 (2
4 bit), 6144 kb/s
Metadata:
encoder : Lavc56.20.100 pcm_s16le
Stream mapping:
Stream #0:1 -> #0:0 (truehd (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 26.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 5a.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 02.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 2a.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 64.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated e8.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 69.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated ab.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 26.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 95.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated f6.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated ef.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated f3.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated d7.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated d7.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 1e.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 66.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 83.
[truehd @ 03734ba0] Lossless check failed - expected 00, calculated 3f.
size= 4554681kB time=01:41:12.90 bitrate=6144.0kbits/s
video:0kB audio:4554681kB subtitle:0kB other streams:0kB global headers:0kB muxi
ng overhead: 0.000002%

Result is a 7.1 WAV

C:\eac3to>eac3to.exe F:\ffmpeg-20150126-git-f994000-win32-static\bin\extract.wav

WAV, 7.1 channels, 1:41:13, 16 bits, 6144kbps, 48kHz

Also, is there any way to create truehd track back ? something like dts master audio suite ...

[bmcelvan]

I have noticed these "errors" as well when using ffmpeg decoding atmos. Are they really lossless errors or just atmos being bitchy about being decoded?