Hello. After encoding mxf, I get mp 4, with a constant bitrate parameter. Tell me how to change the "Bit rate mode: Constant" parameter to variable? What parameter should you set?
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom)
File size : 18.3 MiB
Duration : 4 min 48 s
Overall bit rate mode : Variable
Overall bit rate : 532 kb/s
Encoded date : UTC 2021-05-17 12:33:57
Tagged date : UTC 2021-05-17 12:33:57
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4
Format settings : CABAC / 5 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference : 5 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 4 min 48 s
Bit rate mode : Variable
Bit rate : 402 kb/s
Maximum bit rate : 450 kb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
File size : 34.6 MiB
Duration : 8 min 5 s
Overall bit rate : 597 kb/s
Encoded date : UTC 2021-05-24 12:24:56
Tagged date : UTC 2021-05-24 12:24:56
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4
Format settings : CABAC / 5 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference : 5 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 8 min 5 s
Bit rate : 450 kb/s
Width : 720 pixels
Height : 576 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.043
Stream size : 27.0 MiB (78%)
mp4 bitrate cbr or vbr
Re: mp4 bitrate cbr or vbr
The H.264 encoder is essentially just x264, which means that you can specify custom parameters underneath it.
What you're gonna need for CBR is pretty straightforward and it's:
--nal-hrd cbr
Cheers,
Frank
What you're gonna need for CBR is pretty straightforward and it's:
--nal-hrd cbr
Cheers,
Frank