CRF客制化

config.py

@@ -20,6 +20,8 @@ FFMPEG_USE_NVIDIA_GPU = False
 FFMPEG_USE_INTEL_GPU = False
 # bitrate
 VIDEO_BITRATE = "2.5M"
+# crf
+VIDEO_CRF = 28
 # [video]
 # title
 VIDEO_TITLE = "【永恒de草薙直播录播】直播于 {}"
@@ -61,11 +63,12 @@ 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_NVIDIA_GPU, FFMPEG_USE_INTEL_GPU, VIDEO_BITRATE
+        global FFMPEG_EXEC, FFMPEG_USE_NVIDIA_GPU, FFMPEG_USE_INTEL_GPU, VIDEO_BITRATE, VIDEO_CRF
         FFMPEG_EXEC = section.get('exec', FFMPEG_EXEC)
         FFMPEG_USE_NVIDIA_GPU = section.getboolean('nvidia_gpu', FFMPEG_USE_NVIDIA_GPU)
         FFMPEG_USE_INTEL_GPU = section.getboolean('intel_gpu', FFMPEG_USE_INTEL_GPU)
         VIDEO_BITRATE = section.get('bitrate', VIDEO_BITRATE)
+        VIDEO_CRF = section.getfloat('crf', VIDEO_CRF)
     if config.has_section("recorder"):
         global BILILIVE_RECORDER_DIRECTORY, XIGUALIVE_RECORDER_DIRECTORY, VIDEO_OUTPUT_DIR
         section = config['recorder']
@@ -95,6 +98,7 @@ def get_config():
             'nvidia_gpu': FFMPEG_USE_NVIDIA_GPU,
             'intel_gpu': FFMPEG_USE_INTEL_GPU,
             'bitrate': VIDEO_BITRATE,
+            'crf': VIDEO_CRF,
         },
         'recorder': {
             'bili_dir': BILILIVE_RECORDER_DIRECTORY,

templates/index.html

@@ -75,6 +75,10 @@
             <td>视频比特率</td>
             <td>{{ config.ffmpeg.bitrate }}</td>
         </tr>
+        <tr>
+            <td>视频CRF</td>
+            <td>{{ config.ffmpeg.crf }}</td>
+        </tr>
         </tbody>
     </table>
     <table class="current-config">
@@ -220,6 +224,7 @@
                         nvidia_gpu: false,
                         intel_gpu: false,
                         bitrate: "",
+                        crf: "",
                     },
                     recorder: {
                         bili_dir: "",

workflow/video.py

@@ -5,7 +5,7 @@ from datetime import datetime, timedelta
 from typing import IO
 
 from config import FFMPEG_EXEC, VIDEO_BITRATE, FFMPEG_USE_NVIDIA_GPU, VIDEO_CLIP_EACH_SEC, VIDEO_CLIP_OVERFLOW_SEC, \
-    FFMPEG_USE_INTEL_GPU, VIDEO_OUTPUT_DIR
+    FFMPEG_USE_INTEL_GPU, VIDEO_OUTPUT_DIR, VIDEO_CRF
 
 
 def base_ts_to_filename(start_ts: float, is_mp4=False) -> str:
@@ -164,6 +164,6 @@ def _common_ffmpeg_params():
     return (
         "-f", "mp4", "-b:v", VIDEO_BITRATE, "-c:a", "copy",
         "-preset:v", "fast", "-profile:v", "main", "-avoid_negative_ts", "1",
-        "-qmin", "12", "-qmax", "34", "-crf", "26", "-g:v", "60",
+        "-qmin", "18", "-qmax", "38", "-crf", str(VIDEO_CRF), "-g:v", "240",
         "-fflags", "+genpts", "-shortest", "-movflags", "faststart"
     )