Hot answers tagged conversion
7
Converting a from wma file to wav is technically un-compressing it. You will not be able to regain the quality lost from the original compression, but you shouldn't lose any additional quality as long as the algorithm of the conversion software is decent.
ffmpeg should work well for your needs.
Edit: (Thanks to @evilsoup for the command line given in the ...
7
You can encode to Theora video and Vorbis audio with FFmpeg if it has been compiled with --enable-libtheora and --enable-libvorbis. Depending on your ffmpeg version the default settings may not provide good enough quality. Therefore you must add some additional parameters to enable a constant quality type of mode for the video.
The valid range to set video ...
6
The following example will make a directory called outputdir and then re-encode all wav inputs in the current directory to mp3:
mkdir outputdir
for f in *.wav; do ffmpeg -i "$f" -c:a libmp3lame -q:a 4 outputdir/"${f%.wav}.mp3"; done
You can use a slightly modified command to convert multiple formats to MP3:
mkdir outputdir
for f in *.{wav,aiff,flac,m4a}; ...
4
A DAC converter like the one linked, will look through the stream of bits coming from the optical/toslink connection and create an analog bit stream from them. The quality associated with this box will most likely result from the power output (SNR) of the actual DAC chip itself, this will be the quality limiting factor since the other connection is purely ...
4
You can use the amerge and pan filters in ffmpeg to combine two mono streams into one stereo output:
ffmpeg -i input -filter_complex "[0:3] [0:4] amerge,pan=stereo:c0=c0:c1=c1" -c:v copy -c:a pcm_s16le output
or using -ac instead of pan:
ffmpeg -i input -filter_complex "[0:3] [0:4] amerge" -c:v copy -c:a pcm_s16le -ac 2 output
[0:3] and [0:4] refer to ...
4
You can use wonderful ffmpeg for your desired workflow. There is a guide here on this page but once you have the ffmpeg installed, you can simply cd into your folder with sequence, and type in your terminal:
ffmpeg -f image2 -pattern_type glob -i '*.png' -vcodec qtrle -r 25 -s 1920x1080 test.mov
To understand the options, you can check the documentation ...
4
What you are talking about is upscaling and any current HDTV will do upscaling automatically. Upscaling doesn't work miracles though, it will only make it so that the lower quality signal can be watched on a higher quality display. It just multiplies the pixels so that a 720 by 480 (.9 pixel compressed) signal for example doesn't end up only taking up 1/4 ...
3
The cabling is likely your problem. The composite cables you're using (red, yellow, white) will only move analog signal from the set top box to the TV. Likewise with RG59 or RG6 (coaxial).
While both varieties of cables there are technically capable of passing digital signals (they don't care... they're just dumb cables), set top boxes typically only ...
3
Devices are often picky, and specifications are usually too uninformative so it's always trial and error. For example, your link indicates that the phone supports MP4 playback, but that is simply a container than can utilize several video and audio formats.
MPEG-4 part 2 video and AAC-LC audio
(partially based on the working video details you provided)
...
3
If you had just 4:3 and 16:9 videos, I would suggest:
ffmpeg -i input.mov -filter:v 'scale=-1:768;crop=1024:ih' \
-c:v libx264 -crf 23 -preset veryfast output.mp4
That would scale a video to a height of 768, scaling the width to keep the aspect ratio; and then it crops the width to 1024, keeping the height at 768. However, the fact that you are using 1:1 ...
3
ffmpeg has removed their x264 presets so the -vpre setting doesn't work any more.
Now, I have a script for converting video files to a format my Cellphone can handle.
ffmpeg -i input.avi -sws_flags lanczos+accurate_rnd -vf "scale=320:240" -c:v libx264 -crf 20 -preset veryslow -profile:v main -tune fastdecode -c:a copy output.mkv
I'll explain each option
...
2
For a server, you definitely want ffmpeg. I would also strongly recommend compiling it yourself (those are Ubuntu instructions, but should work for Debian as well AFAIK) - the best AAC encoder available for ffmpeg (libfdk_aac) cannot be redistributed alongside x264 (because of the GPL), and the version of ffmpeg in the repositories is probably too old for ...
2
Adobe Premiere Elements is like $80 and does all that including stabilization.
I use Premiere pro on my main comp and you elements on my backup computer since I couldn't afford another copy.
It's not free but I've looked for free editors and you won't find anything free that does stabilization.
Elements project files can be imported in to Premiere Pro so ...
2
Amazingly, the best place to start with a question like this is Youtube. Believe it or not they have help file that explain the process with quite a bit of detail:
https://support.google.com/youtube/bin/answer.py?hl=en&answer=1722171&topic=2888648&ctx=topic
On Youtube itself many others have offered up video tutorials on how to do it:
...
2
For amateur events, SDI may be overkill compared to using simple Component. The key for long runs is to separate the various components so that they don't degrade. There is a similar question here about long distance runs.
As for HDMI to SDI, there should be no quality loss compared to HDMI as both are digital formats supporting full uncompressed HD ...
2
If you select your clip and go to the Clip menu, then choose Analyse Content, Premiere will attempt to identify speakers and even attempt to dictate what is being said. You can assist this analysis by providing a script file to it by adding either an Adobe Story Script file or a TXT file to the Reference Script option. I don't have any experience with how ...
1
If you want something pretty standard and with good quality with DV. The most important thin, whatever the codec you choose, configure it for an interlaced source (since VHS signal is interlaced). If you don't you will end up with a digitized file that will need more space and have much lower quality.
1
VHS is already highly 'compressed', so capturing to an uncompressed format is likely overkill. For your purposes MJPEG with a reasonably high quality setting will preserve all your options and shouldn't degrade the images any further than VHS already has.
MJPEG goes by other names -- the idea is that it's all "I-frames". It is a lossy codec, but there are ...
1
WAV is an uncompressed format. Unless you are merging tracks, reducing the sample rate, or lowering the bit depth (all unlikely to happen by accident), a plain conversion to WAV will always be lossless. Of course, this will not remove noise introduced by the lossy compression on the source material. Basically, any program you find will suffice.
1
Wonderful ffmpeg command line utility is the solution. Just check their documentation, but something like the following will probably work for your case:
ffmpeg -i video.mts video%05d.png
This will take your video, and create video00001.png, video00002.png... files in the same folder.
You can find a lot of guides for ffmpeg, or ask here for a specific ...
1
I spent my eveening but finally found a working software. That's not a freeware :( 69 boxes, but it works so I'll buy it. This is Wondershare Video Converter Ultimate.
Don't hesitate to edit this answer if you feel that my answer is too spammy.
Happy converting
1
You didn't supply very much information, such as your OS and your desired output format, so I can not give you a detailed answer.
CAF is a container format that can support several audio formats, but Apple Lossless (ALAC) is probably the most common.
ffmpeg can decode ALAC in CAF:
ffmpeg -i input.caf output.wav
This can be turned into a "batch" command ...
1
This will depend a bit on exactly what is in the files. They may be just audio, but they may have midi bits and pieces in there as well.
In your .band file, you should have a media subfolder, and the audio tracks should be in there (as .aiff files if I recall). Any audio app should let you import them and let you save as wav, mp3 or whatever. I'd use ...
1
Ion do a range of these sorts of things - from audio to video etc. SOme do auto flipping to play both sides before stopping. The one you linked to also gets good reviews.
The thing you need to remember is that audio circuitry these days can give you higher quality than your cassettes, at a very low price.
So get one of them, run Audacity (which will ...
1
Flac is just flac - it will accurately encode whatever is fed into it. You are right though, that if you feed in a poor quality audio file it will remain a poor quality file.
The only likely way to do this would be through spectrum analysis:
Analysis of the frequencies in the file may indicate compression or sampling artifacts, but automatically scanning ...
1
The worst part of transferring old VHS to DVD is that it has to be done in real time as VHS is linear access and analog. Here are two ways I know of that work. One will eat your time the other will eat your wallet.
1) for about $35 or less you can get a transfer device which connects the output of your VHS machine into a USB interface to your computer. ...
1
There are some things to make clear:
A format is not a codec; you want to get a file in avi format with video encoded with h264 codec. Just use -vcodec libx264 and a filename with .avi. Ffmpeg should recognize a format by looking at a file extension, but you may also be specific adding -f avi. You definetely not want to use mpeg1, because it gives worse ...
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