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0
votes
3answers
952 views

How should I decide on a default audio format?

I see that Windows sets the default output format at 16-bit, 44100 Hz (CD Quality). Most of my music is in this format, but most of my movies use a 16-bit at 48 KHz format (named DVD quality in the ...
1
vote
1answer
90 views

Why is preserving the pitch in audio playback (allegedly) less performant?

In VLC for Android, i discovered an option to preserve the pitch during faster-than-normal playback: The "requires a fast device" obviously implies that faster playback is more performant when the ...
2
votes
1answer
812 views

LIBFAAC cannot resample channels

Im using avconv to convert video files into MP4, but whenever I try to encode files with 6 or 8 channels into 2 channels using libfaac I get these error messages: Can not resample 8 channels @ 44100 ...
1
vote
0answers
137 views

Change CAF (Core Audio Format) volume without resampling

I've converted some MP3 files to CAF, but unfortunately all of them have inadecuate volume intensity Is there a tool to change their volume without resampling, to avoid any possible loss in quality ...
2
votes
2answers
2k views

Why noises appeared when convert 16bit wav to 8 bit wav, how to avoid it?

We have some 16bit/8000HZ/Mono/PCM .wav files, we need to convert to 8bit to use in our telephone system. But after conversion, we found there're many noise appeared in the 8bit .wav files even if ...
0
votes
1answer
119 views

Image Upsampling

I don't know if this specifically belongs on Stack Overflow; but I will post it here with hopes that it will be moved to the right section (if this is indeed the wrong section). I have Photoshop, and ...
1
vote
4answers
510 views

How do I rescale large images?

How do I reduce the dimensions of large .png images? I've tried GIMP, Paint.NET, and IrfanView, and they work well for smaller images but won't even open larger ones.
2
votes
1answer
3k views

How to change audio frequency?

I want to change the frequency of an audio file. Meaning: the whole file should sound (say) one octave higher or lower. How to do it? Using ffmpeg or other command line open source tool would be ...
2
votes
2answers
793 views

Resampling embedded raster images in SVG

I have a batch of SVG files with embedded, high-res PNG images. The PNG files have been resized considerably smaller (via transform, matrix, etc). What is the best way to resample these embedded ...
0
votes
2answers
2k views

Converting a .mp4 file throws “Resampling with input channels greater than 2 unsupported.” error

I am trying to convert a mp4 file into flv with 2 audio channels & sample rate of 44.1 Khz (because .flv does not allow higher than that). Here is the pastebin for the error. As seen from the ...