FFMPEG COMBINE VIDEOS INTO QUAD VIEW MP4
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They require all inputs to have the same size in the dimension normal to the join direction i.e. The stack filters are somewhat more efficient. For streamlining purposes, I would do it in two - then the two encodes aren't competing for memory or CPU. When using the originals, it doesn't matter whether you do it in one step or two. c:v libx264 -tune film -crf 16 -b:a 256k triple.mp4 ffmpeg -i left.mov -i centre.mov -i right.mov Quality-wise, it's better to use the original MOVs, but if the MP4-based stacking looks ok, that's the final arbiter. Is there anything obviously wrong with it?įfmpeg -i left.mov -c:v libx264 -preset medium -tune film -crf 16 -c:a aac -b:a 256k left.mp4 mov files, which seems to work as desired.

Is that right or is it in some way combining them?Īm I right in thinking a term like in the filter_complex expression means 'second input, first video track only'? Since the audio is the same on each it doesn't matter to me which one. When preparing the widescreen, I think ffmpeg chooses the audio from just one of the input files. Is there any advantage either way? It seems like the overlay should be slower but in testing seemed about the same.įfmpeg -i left.mp4 -i centre.mp4 -i right.mp4 -filter_complex 'pad=iw*3:ih overlay=w overlay=w*2' triple.mp4 When preparing the widescreen I came across an alternative method using overlay like below. If I should do the conversion to H.264 at the same time as making the widescreen how do I combine the different commands? Should I do the process in two steps - (a) convert files, (b) make widescreen file - or does that mean the widescreen video is re-encoded therefore it's worse quality? I'd like to keep the separate files so if there's no other impact then I'd prefer to do it as two steps. filter_complex 'hstack=inputs=3' triple.mp4

FFMPEG COMBINE VIDEOS INTO QUAD VIEW MP4

it'll be 1920px times 3 wide and 1080px high.įor generating the widescreen I've worked out I can use this command assuming I've prepared the individual mp4 files: ffmpeg -i left.mp4 -i centre.mp4 -i right.mp4 Generate a single widescreen video in H.264/AAC, i.e. I'd like to:Ĭonvert to H.264 video and AAC audio, retaining very good quality (for public exhibition), and mov files with video in Apple ProRes (apcn) and audio in PCM S24 LE (in24), of identical length and dimensions (1920x1080), frame rate (23.976024) and each with the same audio track. That said, this does actually open up the idea that I could conceivably open the video in some video editing application, rotate it 90 degrees one way, rotate it again back 90 degrees the other way, and then save it and that would maybe save the correct resolution in Windows, but I'm not sure how well that would work or if it would do anything to the video quality.I have three. As such, it opens up with the wrong aspect ratio in, for example, Hitfilm Express (top and bottom of the video are cut off with black bars on the sides) and Flowframes (video appears very 'squashed' with black bars at the top and bottom) as they both think the video is 1920W x 1080H. But if I right-click on the 'properties' of the file it says that the Frame Width is 1920 and the Frame Height is 1080, which it isn't - the width is 1080 and the height is 1920.

FFMPEG COMBINE VIDEOS INTO QUAD VIEW WINDOWS

What I mean by this is that if I click on the video and open it in, say, Windows Photo and Video viewer or whatever the default program is, it displays just fine. It may have an option to let you convert the video to any custom resolution you want.Possibly - the issue isn't so much that the video isn't at the right resolution, it's that the file information is wrong.

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There's a free video editing app called HandBrake: HandBrake: Open Source Video Transcoder

Ffmpeg combine videos into quad view