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使用QP作为码率控制策略

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This commit is contained in:
Jerry Yan 2022-12-08 12:54:59 +08:00
parent c3993965a9
commit a13f732321
2 changed files with 11 additions and 13 deletions
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15
config.py
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@ -28,10 +28,10 @@ FFMPEG_USE_NVIDIA_GPU = False
FFMPEG_USE_INTEL_GPU = False
# vaapi
FFMPEG_USE_VAAPI = False
# bitrate
VIDEO_BITRATE = "2.5M"
# gop
VIDEO_GOP = 60
VIDEO_GOP = 30
# qp
VIDEO_QP = 28
# [video]
# enabled
VIDEO_ENABLED = False
@ -94,15 +94,14 @@ def load_config():
VIDEO_CLIP_OVERFLOW_SEC = section.getfloat('overflow_sec', VIDEO_CLIP_OVERFLOW_SEC)
if config.has_section("ffmpeg"):
section = config['ffmpeg']
global FFMPEG_EXEC, FFMPEG_USE_HEVC, FFMPEG_USE_NVIDIA_GPU, FFMPEG_USE_INTEL_GPU, VIDEO_BITRATE, \
VIDEO_GOP, FFMPEG_USE_VAAPI
global FFMPEG_EXEC, FFMPEG_USE_HEVC, FFMPEG_USE_NVIDIA_GPU, FFMPEG_USE_INTEL_GPU, VIDEO_QP, VIDEO_GOP, FFMPEG_USE_VAAPI
FFMPEG_EXEC = section.get('exec', FFMPEG_EXEC)
FFMPEG_USE_HEVC = section.getboolean('hevc', FFMPEG_USE_HEVC)
FFMPEG_USE_NVIDIA_GPU = section.getboolean('nvidia_gpu', FFMPEG_USE_NVIDIA_GPU)
FFMPEG_USE_INTEL_GPU = section.getboolean('intel_gpu', FFMPEG_USE_INTEL_GPU)
FFMPEG_USE_VAAPI = section.getboolean('vaapi', FFMPEG_USE_VAAPI)
VIDEO_BITRATE = section.get('bitrate', VIDEO_BITRATE)
VIDEO_GOP = section.getfloat('gop', VIDEO_GOP)
VIDEO_GOP = section.getint('gop', VIDEO_GOP)
VIDEO_QP = section.getint('qp', VIDEO_QP)
if config.has_section("recorder"):
global BILILIVE_RECORDER_DIRECTORY, XIGUALIVE_RECORDER_DIRECTORY, VIDEO_OUTPUT_DIR
section = config['recorder']
@ -140,7 +139,7 @@ def get_config():
'nvidia_gpu': FFMPEG_USE_NVIDIA_GPU,
'intel_gpu': FFMPEG_USE_INTEL_GPU,
'vaapi': FFMPEG_USE_VAAPI,
'bitrate': VIDEO_BITRATE,
'qp': VIDEO_QP,
'gop': VIDEO_GOP,
},
'recorder': {

9
workflow/video.py
View File

@ -3,9 +3,9 @@ import subprocess
from datetime import datetime, timedelta
from typing import IO
from config import FFMPEG_EXEC, FFMPEG_USE_HEVC, VIDEO_BITRATE, FFMPEG_USE_NVIDIA_GPU, VIDEO_CLIP_EACH_SEC, \
from config import FFMPEG_EXEC, FFMPEG_USE_HEVC, FFMPEG_USE_NVIDIA_GPU, VIDEO_CLIP_EACH_SEC, \
VIDEO_CLIP_OVERFLOW_SEC, \
FFMPEG_USE_INTEL_GPU, VIDEO_OUTPUT_DIR, VIDEO_GOP, FFMPEG_USE_VAAPI
FFMPEG_USE_INTEL_GPU, VIDEO_OUTPUT_DIR, VIDEO_GOP, VIDEO_QP, FFMPEG_USE_VAAPI
from . import LOGGER
@ -216,7 +216,6 @@ def quick_split_video(file):
"-ss", str(current_sec),
"-i", file, "-c:v", "copy", "-c:a", "copy", "-f", "mp4",
"-t", str(VIDEO_CLIP_EACH_SEC + VIDEO_CLIP_OVERFLOW_SEC),
"-fflags", "+genpts", "-shortest", "-movflags", "faststart",
os.path.join(VIDEO_OUTPUT_DIR, "{}.mp4".format(current_dt))
], stdout=subprocess.PIPE)
handle_ffmpeg_output(split_process.stdout)
@ -237,8 +236,8 @@ def _common_ffmpeg_setting():
def _common_ffmpeg_params():
return (
"-f", "mp4", "-b:v", VIDEO_BITRATE, "-c:a", "aac",
"-f", "mp4", "-c:a", "copy",
"-preset:v", "fast", "-profile:v", "main", "-avoid_negative_ts", "1",
"-qmin", "18", "-qmax", "38", "-g:v", str(VIDEO_GOP),
"-qp", str(VIDEO_QP), "-g:v", str(VIDEO_GOP),
"-fflags", "+genpts", "-shortest"
)