Hot answers tagged

20

You can use ffmpeg to create video from audio using several filters. avectorscope Convert input audio to a video output, representing the audio vector scope. ffmpeg ffmpeg -i input.mp3 -filter_complex "[0:a]avectorscope=s=1280x720,format=yuv420p[vid]" \ -map "[vid]" -map 0:a -codec:v libx264 -crf 18 -preset fast -codec:a aac -strict -2 \ -b:a 192k ...


6

I suspect you are having problems because you are trying to overwrite the input file with the output, ffmpeg just doesn't work that way. For a single file: ffmpeg -i input.avi -an -c:v copy output.mkv To do every file in a directory, you can use a for loop. For every `file.avi``in the working directory, this command will create an output called ...


5

If you just play the comp it won't play audio. You need to do a RAM preview. Hit 0 (zero) on the numeric keypad or Ctrl+0 if you're on a laptop. . (period) on the numeric keypad (or for laptop ctrl+.) plays just the audio from wherever the playhead is. If your footage does have audio, you will see the waveform in the preview thumbnail in the project ...


5

If you are judging Vegas Pro audio editing on native effects than I don't think it has any edge over others. I have been using the Pro version for about 18 months now and I find it pretty darn good overall. I am also learning Adobe Premiere and After Effects CS5.5, so far I think Vegas has the edge on the audio for sure. However, are you aware that Vegas ...


5

Is it possible? Sure, just setup each source clip as a sequence that has the audio feed you want for that shot and leave the tracks linked so that you cut between both video and audio. Is it advisable? Probably not. People are far less used to changing of the audio scene they are watching. Video creates kind of a disconnect between the scene we are ...


5

There are a variety of reasons to have an external recorder depending on the size of your production. A big advantage is the number of audio inputs and the ability to record each of those inputs as separate tracks, allowing you to do the mixing in post. I'm not sure about the H4n, but I know the H5 and H6 support multiple inputs as well as interchangeable ...


5

First, get ffmpeg. Generally, you want to give YouTube the highest quality you can because it will re-encode anything you give it, but the formats used in MXF can be mental for uploading. So re-encoding to modern formats for a more manageable upload often makes sense. Example ffmpeg -i input.mxf \ -filter_complex "[0:a:0][0:a:1]amerge" \ -ac 2 -c:v ...


4

Speech Detection with Adobe Premiere You haven't mentioned what NLE you use to edit, however here is a method you can use to transcribe if you are using Adobe CS4 or later. This method uses speech detection to automatically transcribe videos - a feature brought in with CS4. It then adds the the text into the metadata of the file. Analyze speech to ...


4

To expand upon ObscureRobot's answer, use ffmpeg like so: ffmpeg -loop 1 -f image2 -r 2 -i input1.png -i input2.aiff -c:v libx264 -c:a copy -shortest output.mp4 -loop 1 -f image2 -r 2 -i input1.png tells ffmpeg to loop input1.png forever, at a frame rate of 2fps. -c:v libx264 tells it to use x264 to encode the video, and -c:a copy tells it to simply copy ...


4

It depends on the exact studio's process, but generally either an animatic (basically a roughly animated storyboard) or the audio is done first. In the case of Family Guy and American Dad specifically, it sounds like they work on the audio and the animatic first. The advantage to doing an animatic first is it can help the voice actors visualize what will ...


4

If you work on a regular basis with the "owner" of the voice I can recommend Nuance's Dragon it offers very accurate speech to text with very few errors but it needs some "calibration" to a specific voice. So if you can get your actor/narrator to read the calibration text you will have an easy time making transcripts and subtitles (though subs will require ...


4

AVI and MKV are both containers, so in theory it should be possible to transfer your contents with no further loss. I can't say for certain if MKV can wrap xvid4, but it's very likely. You shouldn't need to decode / re-encode to transfer the contents, just demux / remux.


4

Can't speak for the Nikon, but the Canon 5D and 7D both have terrible on-board audio, with no way to easily monitor the audio levels. The Zoom will have a better mic pre-amp, and will let you monitor the levels easily and accurately. You can also monitor the audio on headphones whilst filming, so you'll stand a better chance of spotting problems, like wind ...


4

Yes, its way better. Being able to monitor the levels, and headphones, makes a huge difference. However, its not even just the quality of the mic or recording device its the location. Having an external recorder means you can separate the audio easily from the camera. Back in the day when I was a teen, and had more enthusiasm than money, we used mics from ...


4

I've used AudioMicro.com and like a lot of their music. I hear good things about incompetech.com. You can also just Google "royalty-free music sites" and you'll find several, each with different terms and prices.


4

I know for a fact GoPro gets its music from extrememusic.com, and I personally use Night3x from youtube for electronic music, and RFGB for orchestral music. AudioJungle offers some great services to. Another source is CC-Mixter, straight from the creative commons, but I myself do not think that the library present is too good. If you are looking for audio ...


4

The Mainconcept or Sony codecs in Vegas are subpar for low-bitrate output such as needed for HTML5 use. Use ffmpeg to generate your HTML5 videos. Yes, mono audio is acceptable for HTML5 use, but once you use ffmpeg/x264 for generating those videos, the 6kB/s savings you get from switching to mono audio won't matter much if at all. Get the 32-bit static ...


4

There are a lot of variables in this equation, and any one of them could be the culprit. These include: the quality of the audio picked up by the lapel mic, the quality of the PA preamp, the quality of the PA signal output to the wireless transmitter, the quality of the wireless transmitter, the quality of the wireless receiver, and finally, the quality of ...


3

OK, I'll have a go. Here's my own answer (and advise I should take for myself - which I actually did do to some extent): Avoid procrastination. Start small. Start with doing something. Don't hold up too high expectations to put yourself off. Good ideas here: http://zenhabits.net/dead-simple-guide-to-beating-procrastination/ (I succeed a bit with this ...


3

I have no idea if this is optimal for you, but one approach using free software would be to first determine the percentage (and direction) of drift by finding a point near the end where you can tell with some precision what the sync error is, in frames. Demux the video and audio into separate streams, using a free tool like AVI-Mux. Load the audio into ...


3

You are looking for a Non-Linear Video Editing packages or NLE. Premiere and Final Cut Pro are two of the most popular, but they are also relatively pricy professional products. There are also many cheaper and/or free options available such as Windows Movie Maker (Windows) or iMovie (Mac). If you search for non-linear editing software or video editing ...


3

For videography, the best bang for your buck is, hands down, going to be an entry level DSLR and a decent lens. For audio, if your budget can allow for it, I suggest getting a stand alone multi-track recorder. The Zoom H4n is a particularly popular model with videographers for its low price and decent (though not superb) audio quality. (Update: The H5 and ...


3

Copied from the Tascam manual: Analog audio input/output ratings MIC/EXT IN jacks (supporting plug-in power) Connector: 1/8” (3.5 mm) stereo mini Input impedance: 25 kâ„Ĥ Nominal input level: –20 dBV Maximum input level: –4 dBV This Tascam doesn't even take nominal consumer level without distorting (-10dBV). Most likely on an RCA output from a mixer you'll ...


3

YouTube has several captioning options. At one time they had free computer generated captions which you could then download the results in a text file. YouTube currently provides this list of caption software and services.


3

As Jim Mack has correctly pointed out MKV (Matroska) and AVI are containers, and are both able to store many of the same streams without any change to the streams themselves, and thus the remuxing should be lossless. But there is one time where data is lost when remuxing from AVI to MKV. The thing is that some poor encoders in the day of AVI have created ...



Only top voted, non community-wiki answers of a minimum length are eligible