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Yes, this is possible using ffmpeg and the mkv container. An example command sequence would be: ffmpeg -i input1 -i input2 -c copy -map 0 -map 1 output.mkv source Breaking down the command: -i input1 This selects the first input file. Could be something like my video_track1.mov. -i input2 Here you can specify the second input file. You can add another ...


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After seeing something similar and wondering how it was done in a video with a guy, girl video looks edited. I tried this, and think that he actually is writing on glass, is filmed from front, with mirrored letters. After filming just simply flip video horizontal, and text will be mirrored back to normal and guy will be mirrored. Just make sure there is no ...


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The biggest problem you are facing is that a DSLR typically records to the H.264 codec. That codec tries to minimize the file size and the only way to achieve that is to throw out negligible information. Sadly human eyes are not sensitive to black parts of video, so dark areas are highly compressed. That means you will have a really hard time brightening ...


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A videofilter in ffmpeg always has to modify pixel information hence the reason why you need to re-encode. It seems logical at first that you wouldn't have to do this when cropping but the way lossy video codecs work makes this pretty impossible without re-encoding everything. They usually don't see an array of pixel information but a much more complex ...


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I'd argue that for casual shooting (family, travels etc) you are not going to carry an expensive bulky camera, you are likely not going to carry anything on you… except maybe your mobile phone. So I would look into buying a cheap mobile 4k device. Two good looking recent mobile phones able to record 4k are the Samsung Galaxy Alpha and the Sony Xperia Z3. You ...


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An MP4 file normally contains H.264 video and AAC audio, both of which are compatible with the FLV container. You could simply copy over the streams: ffmpeg -i input.mp4 -c copy output.flv Since you're copying the streams, this will be as close to instantaneous as you're going to get and will not result in any loss of quality.


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Try to extract header from other file (e.g. create a new one with that recording software) and prepend it to your stream. On Windows you can use that command to concatenate files: copy /b header.hdr + stream.mov outputFile.mov


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I found that using Adobe Media Encoder is much easier when just cropping. Add the video to the queue and open the export settings. On the source tab you can crop the video and there you can also enter how many pixels to remove at each side. Remember to set the correct output size in the video tab on the right side. Here is a screenshot showing how i did it: ...


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No, one offending video won't taint your entire channel. At my workplace, sometimes the youtube algorithms will mistakenly flag some music to which we own the rights as copyright protected. When such an event occurs, the video is automatically un-monetized, and we are asked to demonstrate that we have rights to the music. The video still plays, we just ...


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Grab a pre-keyed smoke element from somewhere. Mask the smoke element as desired. Copy that mask onto the text or you can parent the mask as an adjustment layer. Keyframe opacity of text, linear wipe with feather in a gradient/ramp solid for the background. The "sparkling" effects are lens flares (see JJ Abrams) The curtain moving effect could be just ...


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Yes, CHDK should be able to do this. There are actually scripts available on their wiki for this. Basically, you have to tell it to press the video start button, wait a second or two for it to start, then begin polling to see if the get_movie_status has changed to the status for being done recording. You then wait a second and repeat. You'll also want to ...


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You have to check the specification of your camera. 30Mb/s could be plenty for 60fps 4k or not enough for 24p SD, entirely depending on what format and data rate is being used. Your camera should say the data rate of whatever you intend to record in. Use that to determine the needed card speed. Make sure that the write speed is actually what you need as ...


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The issue with the frames are very likely the results of using h264 and not re-encoding the video. h264 usually doesn't have single frames (unless encoded with an intra profile) but groups of frames (GOPs), ffmpeg will cut at a keyframe position ie. at the end or beginning of a GOP. Or not in the case of your first approach, giving you issues with the ...


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It is specifically a rolling shutter artifact combined with a wagon wheel effect. It is simply that the scene is only illuminated for a portion of the frame read. You can actually observe the same thing in still photography when you take a flash photo above the sync speed of the camera (because the flash is not long enough to cover the full exposure and ...


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What you're looking for is a difference matte. (Not to be confused with a Color Difference Key which is similar to regular chroma key.) It can certainly be done, though you should know that difference mattes are fairly temperamental. The way it works is by finding the difference between an image and each frame of video, and removing anything that's the ...


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You are almost certainly up a creek with no paddle. Since video is less than 8 bit color, what you see when you watch it is what is there. If there was some small amount of detail but it was just really dark, then you could alter the white point and get something minimally usable out of the darkest part of the image. This can be done with any decent ...


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You could use the 30 days trial version of Premiere Pro (most editing programs will be able to perform the following options). The best way to make the video viewable depends on how badly the video is underexposed. If some areas are literally pitchblack, there is nothing you can do about it. First, try to use the brightness and contrast effect and raise ...


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I am a little late in this topic. With a Creative Commons license, the Author wishing to use work of another author is typically permitted to use portions of the work, change, edit, recompile, or any other alteration except for specific items listed in the license document, with the caveats that; they include a clear path for the end user to obtain the ...



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