Hi list, First of all, thanks to the ffmpeg developers and community for this awesome software.
I'm using a two-pass workflow, where I pipe concatenate source files in the first pass, then trim and process the result in a second pass. I am not changing framerates. Quoting from https://video.stackexchange.com/questions/20958/ffmpeg-dropping-duplicate-frames FFmpeg duplicates or drops frames when the input and output framerates differ. If I apply an ffmpeg command line to process a raw MTS file from a camera, I do not get "More than 1000 frames duplicated" warnings during processing. However if I combine MTS files using pipe concatenation, e.g. ffmpeg -i concat:"./00000.MTS|./00001.MTS" -codec copy ./00000.mp4 then run the same command line on the mp4 result, I get plentiful duplicate frame warnings. I'm using Jon Van Sickle's statically ffmpeg, to wit, ffmpeg-git-20180216-64bit-static/ffmpeg from https://www.johnvansickle.com/ffmpeg/ The command line is: ffmpeg -i ./00000.mp4 -to 3:31 -c:v libx264 -preset:v medium -profile:v main -tune:v film -s:v 640x360 -c:a aac -b:a 80k -ac 2 -ar 24000 -level 3 -strict -2 -copyts -ss 1:29 ../final/20180220-1.mp4 The rendered video appears okay, but I would like to understand what is occurring before running a larger rendering job. Thanks for any suggestions. -- Joel Roth _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
