[HELP] 30>60 fps produces huge files
#1
30 to 60 fps conversion works well with great looking smooth results but the output file is huge - e.g. 8MB clip @ 30fps produces 214MB @ 60 fps. I'm new to using Hybrid so not really sure where to start. Any help greatly appreciated..   

T
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#2
Size of the output depends on the strength of the compression you choose.
if you want a specific file size, use an encoder which supports 2pass encoding and limit the file size accordingly.
-> not enough data about the source and the settings you used to say more
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#3
Thanks for the reply Selur. 

The source was a 1080p MP4 clip (data rate 1204 kbps / total bitrate 1329 kbps). I followed a Youtube guide on using Hybrid to do the conversion and used default settings - except:

1. On the x264 tab - changed the bitrate to 55000 and AVC Profile / Level > 4.2

2. On the Filtering / AVIsynth / Frame tab - ticked 'FPS adjust' box and selected 'Interframe'. Tuning = smooth, Target frame rate = 60.00, Override algo. = smooth, Support = AVIsynth.

Copied and pasted this from the configuration info on the x264 tab:

 
x264 --preset superfast --pass 1 --bitrate 55000 --profile high --level 4.2 --direct auto --lookahead-threads 3 --qcomp 0.5 --rc-lookahead 40 --qpmax 81 --aq-mode 0 --sar 1:1 --qpfile GENERATED_QP_FILE --non-deterministic --range tv --stats "PATH TO THE .stats FILE" --demuxer raw --input-res 48x48 --input-csp i420 --input-range tv --input-depth 8 --fps 60/1 --output-depth 8 --output NUL -

x264 --pass 2 --bitrate 55000 --profile high --level 4.2 --direct auto --lookahead-threads 3 --qcomp 0.5 --no-mbtree --qpmax 81 --partitions i4x4,p8x8,b8x8 --no-fast-pskip --subme 5 --trellis 0 --weightp 1 --aq-mode 0 --vbv-maxrate 62500 --vbv-bufsize 78125 --sar 1:1 --qpfile GENERATED_QP_FILE --non-deterministic --range tv --colormatrix bt470bg --stats "PATH TO THE .stats FILE" --demuxer raw --input-res 48x48 --input-csp i420 --input-range tv --input-depth 8 --fps 60/1 --output-depth 8 --output OUTPUTFILE -
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#4
So you input had 1204 kBit/s and you chose 55 000 kBit/s as target bit rate and wonder why the file is so large?
55000 kbit/s that's ~6.875 MB/s with a 214MB output file that is ~32 seconds of video.
=> your file isn't large because of the frame rate it's large since you chose such a high target bit rate!

As a side note: I would have expected an even larger file with that target bit rate, but seems like the source is saturated before hitting your target bit rate.

Cu Selur
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