안녕하세요, 비트레이트 관련 글 검색해서 다 읽어봤지만 해결이 안되서 글 남깁니다 ㅠ
원본 파일 비트레이트가 30000이면 똑같이 30000으로 인코딩 하고 싶어서 설정에서 똑같이 비트레이트를 설정해봐도 결과물 보면 비트레이트가 18000입니다.
왜 그런 걸까요?? 비트레이트 설정값이 평균값이라는데...
비트레이트 똑같이 인코딩 하는 방법이 있을까요??
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp41/avc1)
File size : 17.6 GiB
Duration : 1 h 23 min
Overall bit rate mode : Variable
Overall bit rate : 30.3 Mb/s
Encoded date : UTC 2019-06-15 08:13:10
Tagged date : UTC 2019-06-15 08:13:10
Writing library : Apple QuickTime
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 h 23 min
Source duration : 1 h 23 min
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 : 29.970 (30000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.483
Stream size : 17.4 GiB (99%)
Source stream size : 17.4 GiB (99%)
Language : English
Encoded date : UTC 2019-06-15 08:13:10
Tagged date : UTC 2019-06-15 08:13:10
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 4986048
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1 h 23 min
Bit rate mode : Variable
Bit rate : 320 kb/s
Maximum bit rate : 326 kb/s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 spf)
Compression mode : Lossy
Stream size : 190 MiB (1%)
Language : English
Encoded date : UTC 2019-06-15 08:13:10
Tagged date : UTC 2019-06-15 08:13:10
Other #1
ID : 3
Type : Object description
Format : System Core
Codec ID : 2
Duration : 1 h 23 min
Language : English
Encoded date : UTC 2019-06-15 08:13:10
Tagged date : UTC 2019-06-15 08:13:10
mdhd_Duration : 1000
Other #2
ID : 4
Type : Scene description
Format : System Core
Codec ID : 2
Duration : 1 h 23 min
Language : English
Encoded date : UTC 2019-06-15 08:13:10
Tagged date : UTC 2019-06-15 08:13:10
mdhd_Duration : 1000
^ 위 정보가 원본 파일이고
1080AVC (2).mpeg
Format : MPEG-PS
File size : 11.5 GiB
Duration : 1 h 23 min
Overall bit rate mode : Variable
Overall bit rate : 19.8 Mb/s
Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@High
Format settings, BVOP : No
Format settings, Matrix : Default
Format settings, GOP : Variable
Duration : 1 h 23 min
Bit rate mode : Variable
Bit rate : 19.1 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 (30000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.307
Time code of first frame : 00:00:00:00
Time code source : Group of pictures header
GOP, Open/Closed : Open
GOP, Open/Closed of first frame : Closed
Stream size : 11.1 GiB (96%)
Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 1 h 23 min
Bit rate mode : Constant
Bit rate : 320 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Compression mode : Lossy
Stream size : 190 MiB (2%)
이게 출력 파일입니다.
출력 파일 형식은 mpeg2로 해야 하거든요 ㅠ
고수님들 도와주세요 ㅠ
샤나인코더로 avc, hevc 인코딩 하였을 때의 비교
