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2

To mostly match the MP4 created by GTM, but with no padding, I'd use ffmpeg -i meeting.g2m -profile:v baseline -c:v libx264 -crf 23 -r 30 -pix_fmt yuv420p -c:a aac -b:a 64k -ar 16k -ac 1 output.mp4 Some notes: The MP4 produced by GTM is variable frame rate, which FFmpeg does not do for MP4 output. The notional frame rate reported by the GTM MP4 is ...


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See this blog, too: https://spreadys.wordpress.com/2013/05/18/portable-smplayer-with-fjht-imm4imm5-and-imm6-codecs-included/ the link is taken from this reddit thread: https://www.reddit.com/r/techsupport/comments/1un7cx/converting_this_imm5_avi_file_into_something/ In particular, I've installed the mm4,5 and 6 codec and played the video with Windows ...


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I want to change dimensions of multiple mp4 files in one go You can use a for command to loop and convert the files one at a time. Something like the following. command line: for /f %i in (mylist.txt) do FFmpeg -I "%i" -vf scale=460:690 "output_%i" batch file: for /f %%i in (mylist.txt) do FFmpeg -I "%%i" -vf scale=460:690 "output_%%i" Further ...


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It may be due to the pixel format or atom placement. Try ffmpeg -i INPUT.y4m -c:v libx264 -preset ultrafast -qp 0 -pix_fmt yuv420p -movflags +faststart OUTPUT.mp4


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Yes, see http://apple.stackexchange.com/questions/235376/how-do-i-add-vtt-subtitles-to-a-mp4-video-to-view-on-an-iphone-ios, https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo and https://en.wikibooks.org/wiki/FFMPEG_An_Intermediate_Guide/subtitle_options. That is for subtitles but it gives examples. Try ffmpeg -i input.mkv -map 0:v -map 0:a -c copy ...


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Try this, (although you don't mention what's not working) ffmpeg -s 480x270 -framerate 30 -i left.yuv -s 480x270 -framerate 30 -i right.yuv \ -filter_complex "[0:v:0]pad=iw+10:ih:color=white[l]; \ [l][1:v:0]hstack[v]" -map "[v]" left-right.YUV



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