28 Dec
2012
28 Dec
'12
9:08 a.m.
Hi all,
I have a TV which has a built in USB record feature (which basically
dumps DVB-T MPEG TS in 2GB chunks). I'd like to pull the audio track
out of something I recorded. VLC happily plays the file and identifies
the video, audio and EPG info in the transport stream, but if, for
example, I run:
avconv -i ... -acodec copy audio.mp3
... I end up with about 2 seconds of silence.
It seems there's a couple of dummy streams and also that the overall
file is prefixed with what looks like null garbage. I know that if vlc
can play it, there's gotta be a way of extracting it, but must admit
that I haven't had any luck thus far.
Any ideas on recommended tools for stubborn MPEG TS demuxing?
Anthony
29 Dec
29 Dec
10:35 a.m.
It seems
there's a couple of dummy streams and also that the overall
file is prefixed with what looks like null garbage.
You could confirm this by running avprobe on the file. 
28 Dec
28 Dec
10:15 p.m.
On 28/12/12 20:08, Anthony Hogan wrote:
Hi all,
I have a TV which has a built in USB record feature (which basically
dumps DVB-T MPEG TS in 2GB chunks). I'd like to pull the audio track
out of something I recorded. VLC happily plays the file and identifies
the video, audio and EPG info in the transport stream
I use Kdenlive to convert MPEG TS into mp4 and xvid. I haven't tried
using it to separate audio but it does appear to be able to extract
audio into WAV files.
29 Dec
29 Dec
12:54 a.m.
On 12/28/2012 08:08 PM, Anthony Hogan wrote:
Hi all,
Any ideas on recommended tools for stubborn MPEG TS demuxing?
Anthony
hi
tested on a recording made by kaffeine of an SBS film, system is
Fedora-8 with a DVB-T tuner card. Demuxing was done on another machine.
ffmpeg works fine
Steve
--------------------------------------------
$ ffmpeg -i Micmacs.m2t track1.flac
ffmpeg version 0.10.6 Copyright (c) 2000-2012 the FFmpeg developers
built on Oct 31 2012 22:23:25 with gcc 4.7.2 20120921 (Red Hat 4.7.2-2)
configuration: --prefix=/usr --bindir=/usr/bin
--datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg
--libdir=/usr/lib --mandir=/usr/share/man --arch=i686
--extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
-fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686 -mtune=atom
-fasynchronous-unwind-tables' --enable-bzlib --disable-crystalhd
--enable-gnutls --enable-libass --enable-libcdio --enable-libcelt
--enable-libdc1394 --disable-indev=jack --enable-libfreetype
--enable-libgsm --enable-libmp3lame --enable-openal --enable-libopenjpeg
--enable-libpulse --enable-librtmp --enable-libschroedinger
--enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2
--enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab
--enable-avfilter --enable-postproc --enable-pthreads --disable-static
--enable-shared --enable-gpl --disable-debug --disable-stripping
--shlibdir=/usr/lib --cpu=i686 --enable-runtime-cpudetect
libavutil 51. 35.100 / 51. 35.100
libavcodec 53. 61.100 / 53. 61.100
libavformat 53. 32.100 / 53. 32.100
libavdevice 53. 4.100 / 53. 4.100
libavfilter 2. 61.100 / 2. 61.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 6.100 / 0. 6.100
libpostproc 52. 0.100 / 52. 0.100
[mpegts @ 0x8540bc0] max_analyze_duration 5000000 reached at 5000000
[mpegts @ 0x8540bc0] PES packet size mismatch
Input #0, mpegts, from 'Micmacs.m2t':
Duration: 02:09:57.57, start: 54683.170644, bitrate: 2772 kb/s
Program 1000
Stream #0:0[0xa1]: Video: mpeg2video (Main) ([2][0][0][0] /
0x0002), yuv420p, 720x576 [SAR 64:45 DAR 16:9], 15000 kb/s, 25 fps, 25
tbr, 90k tbn, 50 tbc
Stream #0:1[0x51](eng): Audio: mp2 ([4][0][0][0] / 0x0004), 48000
Hz, stereo, s16, 192 kb/s
Output #0, flac, to 'track1.flac':
Metadata:
encoder : Lavf53.32.100
Stream #0:0(eng): Audio: flac, 48000 Hz, stereo, s16, 128 kb/s
Stream mapping:
Stream #0:1 -> #0:0 (mp2 -> flac)
Press [q] to stop, [?] for help
8:48 a.m.
On Fri, Dec 28, 2012 at 8:08 PM, Anthony Hogan <anthony-luv(a)hogan.id.au>wrote;wrote:
Hi all,
I have a TV which has a built in USB record feature (which basically
dumps DVB-T MPEG TS in 2GB chunks). I'd like to pull the audio track
out of something I recorded. VLC happily plays the file and identifies
the video, audio and EPG info in the transport stream, but if, for
example, I run:
avconv -i ... -acodec copy audio.mp3
... I end up with about 2 seconds of silence.
It seems there's a couple of dummy streams and also that the overall
file is prefixed with what looks like null garbage. I know that if vlc
can play it, there's gotta be a way of extracting it, but must admit
that I haven't had any luck thus far.
Any ideas on recommended tools for stubborn MPEG TS demuxing?
I use mencoder to convert files from our PVR to AVI, you should be able to
just extract the audio, a little script I made for my wife to use to
convert on her netbook is attached
--
Mark "Pockets" Clohesy
Mob Phone: (+61) 406 417 877
Email: hiddensoul(a)twistedsouls.com
G-Talk: mark.clohesy(a)gmail.com
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6 comments
5 participants
participants (5)
-
Anthony Hogan -
Geoff D'Arcy -
Hiddensoul (Mark Clohesy) -
Jason White -
Steve Roylance