John L orionfyre at hotmail.com writes:
Please test the following:
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.ac3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.mp3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2
-acodec pcm_f32le out.wav
I ran all three as
To: ffmpeg-user@ffmpeg.org
From: ceho...@ag.or.at
Date: Mon, 18 May 2015 08:48:32 +
Subject: Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality
John L orionfyre at hotmail.com writes:
Please test the following:
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2
John L wrote:
Please test the following:
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.ac3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.mp3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 -acodec pcm_f32le out.wav
I ran all three as requested, including '-loglevel debug'. All
John L wrote:
Backstory: I have a system in place to automagically convert video files to smaller
formats/versions on request to have a sort of mobile version for my father
who travels extensively. The purpose is so that he can fit significantly more videos on
his tablet than if they were the
On Sun, 17 May 2015 02:16:56 -0500, John L orionf...@hotmail.com
wrote:
-
the resulting wav file is significantly distorted, but qualitatively doesn't
'feel' as harsh
Just FYI John, _some_ of those channels in the 5.1 are already
flattening at peak levels so the
Please test the following:
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.ac3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 out.mp3
$ ffmpeg -i inter.dts -rematrix_maxval 1.0 -ac 2 -acodec pcm_f32le out.wav
I ran all three as requested, including '-loglevel debug'. All three
On Sun, 17 May 2015 07:41:31 + (UTC), Carl Eugen Hoyos
ceho...@ag.or.at wrote:
Not a problem about misunderstanding.
Hope I make sense sometimes too -)
I did now and the question now is:
Is the issue reproducible with:
$ ffmpeg -i inter.dts -ac 2 -acodec pcm_f32le outf.wav
This (above)
John L orionfyre at hotmail.com writes:
But I'm still curious why it would behave in such a way
Me too!
So please test the following and report back:
ffmpeg -i inter.dts -acodec pcm_f32le -ac 2 out.wav
Carl Eugen
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Bazza lamia at jeack.com.au writes:
The simple command
'ffmpeg -i inter.dts -ac 2 -ab 320k out.mp3',
for an MP3 file, will produce this result.
Plainly distorted. -)
You told that and John told us.
I did neither deny it nor asked for another
example for the same comamnd line.
When I
To: ffmpeg-user@ffmpeg.org
From: ceho...@ag.or.at
Date: Sat, 16 May 2015 11:15:29 +
Subject: Re: [FFmpeg-user] Input 5.1 DTS, output 2.0 MP3: Atrocious Quality
Moritz Barsnick barsnick at gmx.net writes:
$ ffmpeg -loglevel debug -i inter.dts -ac 2 -c:a libmp3lame -f null
Instead, take the 5.1 and _DOWNMIX_ all tracks to a single stereo for
the phone/tablet by declaring -acodec -ac 2. No intermediate
steps should be required. Consider also - Do you need pcm_s32le ?
pcm_s16le is usual.
I fail to see how that is any different than what I am doing now. I
John L orionfyre at hotmail.com writes:
ffmpeg version 2.5.6-0ubuntu0.15.04.1
Please test current FFmpeg git head, see
http://ffmpeg.org/download.html
(Please do not test 2.6)
ffmpeg -i inter.dts -ac 2 -c libmp3lame inter-test.mp3
This audio sample has the exact same audio defects as
in
On Sat, 16 May 2015 07:52:12 + (UTC), Carl Eugen Hoyos
ceho...@ag.or.at wrote:
Please test the following:
$ ffmpeg -i inter.dts -ac 2 out16.wav
$ ffmpeg -i inter.dts -ac 2 -acodec pcm_s32le out32.wav
$ ffmpeg -i inter.dts -ac 2 -ab 640k out.ac3
$ ffmpeg -i inter.dts -ac 2 -ab 320k out.mp2
Bazza lamia at jeack.com.au writes:
Please test the following:
$ ffmpeg -i inter.dts -ac 2 out16.wav
$ ffmpeg -i inter.dts -ac 2 -acodec pcm_s32le out32.wav
$ ffmpeg -i inter.dts -ac 2 -ab 640k out.ac3
$ ffmpeg -i inter.dts -ac 2 -ab 320k out.mp2
Carl, I did test some of this stuff.
-
John L wrote:
Instead, take the 5.1 and _DOWNMIX_ all tracks to a single stereo
for the phone/tablet by declaring -acodec -ac 2. No
intermediate steps should be required. Consider also - Do you need
pcm_s32le ? pcm_s16le is usual.
I fail to see how that is any different than what I am
On Sat, 16 May 2015 09:17:59 + (UTC), Carl Eugen Hoyos
ceho...@ag.or.at wrote:
Bazza lamia at jeack.com.au writes:
Please test the following:
$ ffmpeg -i inter.dts -ac 2 out16.wav
$ ffmpeg -i inter.dts -ac 2 -acodec pcm_s32le out32.wav
$ ffmpeg -i inter.dts -ac 2 -ab 640k out.ac3
$
On Sat, 16 May 2015 09:17:59 + (UTC), Carl Eugen Hoyos
ceho...@ag.or.at wrote:
Sorry, I am apparently extremely dim-witted:
Did you test the four lines above?
Which of them sound ok, which of them do
not sound ok?
Seem to have not explicitly answered the Q. Sorry.
$ ffmpeg -i inter.dts -ac
Moritz Barsnick barsnick at gmx.net writes:
$ ffmpeg -loglevel debug -i inter.dts -ac 2 -c:a libmp3lame -f null -
$ ffmpeg -loglevel debug -i inter.dts -ac 2 -c:a pcm_s16le -f null -
You can insert other arbitrary codecs at will.
The former shows a matrix:
1.00 0.00 0.707107
On Sat, May 16, 2015 at 13:07:01 +0200, Moritz Barsnick wrote:
[auto-inserted resampler 0 @ 0xb713840] ch:6 chl:5.1(side) fmt:fltp r:48000Hz
- ch:2 chl:stereo fmt:fltp r:48000Hz
[auto-inserted resampler 0 @ 0xb3b55c0] ch:6 chl:5.1(side) fmt:fltp r:48000Hz
- ch:2 chl:stereo fmt:s16 r:48000Hz
Bazza lamia at jeack.com.au writes:
$ ffmpeg -i inter.dts -ac 2 out16.wav
$ ffmpeg -i inter.dts -ac 2 -acodec pcm_s32le out32.wav
$ ffmpeg -i inter.dts -ac 2 -ab 640k out.ac3
$ ffmpeg -i inter.dts -ac 2 -ab 320k out.mp2
1 = Good
2 = Good
3 = Bad
4 = Good
and 1 you didn't list, AC3 =
On Sat, 16 May 2015 10:25:09 + (UTC), Carl Eugen Hoyos
ceho...@ag.or.at wrote:
Since your answer makes no sense (is ac3 doubly bad?),
maybe you could map 1, 2, 3, 4 to out.mp2, out.ac3 and
the two wav files?
They say a picture is worth 1000 words etc so I'll do it this way.
This is John's
Maybe that's because you're converting lossy audio to another lossy audio
format?
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On Fri, 15 May 2015 23:04:06 -0500, John L orionf...@hotmail.com
wrote:
Backstory: I have a system in place to automagically convert video files to
smaller formats/versions on request to have a sort of mobile version for my
father who travels extensively. The purpose is so that he can fit
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