[MEncoder-users] "New video file has different resolution or colorspace" when concatenating and scaling files

[Reimar Döffinger]

On Tue, Apr 27, 2010 at 04:37:51PM -0500, stattik wrote:
> Concatenating multiple files works fine as long as there is no scaling
> involved.  When scaling is involved, I get the following error:
> 
> [swscaler @ 02518c80]Lanczos scaler, from yuv420p to yuv420p using MMX2
> New video file has different resolution or colorspace than the previous one.
> FATAL: Cannot initialize video driver.
> 
> Both files are from the same camera and so should have all the same
> audio/video properties.
> I've uploaded the test samples to
> ftp://upload.mplayerhq.hu/MPlayer/incoming/Concatenating_and_scaling_error/
> 
> Here's the output:
> 
> mencoder.exe -mc 2 "Z:\Video\Capture\testfiles\00011-part1.MTS"
> "Z:\Video\Capture\testfiles\00011-part2.MTS"  -sws 9 -lavdopts
> threads=2 -ovc x264 -x264encopts
> bitrate=3000:level_idc=40:frameref=1:bframes=4:b_adapt=2:weight_b:b_pyramid=normal:deblock=-1,-1:direct_pred=auto:subq=2:trellis=0:partitions=none:me=dia:threads=auto:mbtree=no:nopsnr:force-cfr
>  -oac pcm -af volnorm -vf scale=640:272, -fps 60000/1001 -ofps
> 30000/1001  -o "Z:\Video\Capture\testfiles\00011-part1.avi"

No surprise, you are only scaling the second video.
If you want an option to apply to all videos, you must put the options before all input files.