Hi,
I’m trying to encode a 30+ min video at 60FPS but Shotcut keeps producing 30FPS even though the setting is at 60FPS. It appears to only work if DUAL PASS is disabled when using Constant Bitrate.
Any advice is greatly appreciated …
Source Video File
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.2
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 1 frame
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 17 min 42 s
Bit rate mode : Variable
Bit rate : 30.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.241
Stream size : 3.71 GiB (99%)
Shotcut - Custom Profile - Video & Codec Tab
Thanks,
Plasmator
Which export preset are you using?
Is the original video you’re editing recorded at 60fps?
[Update]
I managed to get the video encoded using “59.940 (60000/1001) FPS” which is the same as the source. (see details below).
So not totally clear on why Shotcut won’t do 60 FPS and defaults to the lower 30 FPS.
Encoded Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.2
Format settings : CABAC / 4 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 4 frames
Format settings, GOP : M=1, N=15
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 37 min 29 s
Bit rate : 30.0 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 59.940 (60000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.060
Stream size : 7.76 GiB (99%)
Writing library : x264 core 152 r2854 e9a5903
Encoding settings : cabac=1 / ref=2 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=12 / lookahead_threads=2 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=2 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=1 / keyint=15 / keyint_min=1 / scenecut=40 / intra_refresh=0 / rc_lookahead=30 / rc=2pass / mbtree=1 / bitrate=30000 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=30000 / vbv_bufsize=30720 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
Color range : Limited
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Shotcut - Custom Profile - Video & Codec Tab
I do not know why it did not work for you; it works for me using a similar source clip with same export settings. in Settings, my Video Mode is set to Automatic.
My video mode is set to “UHD 2160p 60 fps”.
Does the video mode actually override the export profiles or export settings ?
Only if you don’t select an export mode/preset before exporting.
Otherwise what you select is what you should get.
The Video Mode determines the defaults for the Video tab of the Export panel.
