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帧跳过、zoom

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This commit is contained in:
Jerry Yan
2025-08-07 14:15:32 +08:00
parent 0770cb361d
commit 51e7d21f84
1 changed files with 44 additions and 6 deletions
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50
entity/ffmpeg.py
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@@ -246,12 +246,13 @@ class FfmpegTask(object):
_mid_out_str = "[eff_m]"
_end_out_str = "[eff_e]"
filter_args.append(f"{video_output_str}split=3{_start_out_str}{_mid_out_str}{_end_out_str}")
filter_args.append(f"{_start_out_str}select=lt(n\\,{int(start*self.frame_rate)}){_start_out_str}")
filter_args.append(f"{_end_out_str}select=gt(n\\,{int(start*self.frame_rate)}){_end_out_str}")
filter_args.append(f"{_mid_out_str}select=eq(n\\,{int(start*self.frame_rate)}){_mid_out_str}")
filter_args.append(f"{_mid_out_str}tpad=start_mode=clone:start_duration={duration:.4f}{_mid_out_str}")
filter_args.append(f"{_start_out_str}select=lt(n\\,{int(start * self.frame_rate)}){_start_out_str}")
filter_args.append(f"{_end_out_str}select=gt(n\\,{int(start * self.frame_rate)}){_end_out_str}")
filter_args.append(f"{_mid_out_str}select=eq(n\\,{int(start * self.frame_rate)}){_mid_out_str}")
filter_args.append(
f"{_mid_out_str}tpad=start_mode=clone:start_duration={duration:.4f}{_mid_out_str}")
if rotate_deg != 0:
filter_args.append(f"{_mid_out_str}rotate=PI*{rotate_deg}/360{_mid_out_str}")
filter_args.append(f"{_mid_out_str}rotate=PI*{rotate_deg}/180{_mid_out_str}")
# filter_args.append(f"{video_output_str}trim=start=0:end={start+duration},tpad=stop_mode=clone:stop_duration={duration},setpts=PTS-STARTPTS{_start_out_str}")
# filter_args.append(f"tpad=start_mode=clone:start_duration={duration},setpts=PTS-STARTPTS{_start_out_str}")
# filter_args.append(f"{_end_out_str}trim=start={start}{_end_out_str}")
@@ -269,7 +270,44 @@ class FfmpegTask(object):
filter_args.append(f"{video_output_str}setpts={param}*PTS[v_eff{effect_index}]")
video_output_str = f"[v_eff{effect_index}]"
elif effect.startswith("zoom:"):
...
param = effect.split(":", 2)[1]
if param == '':
continue
_split = param.split(",")
if len(_split) < 3:
continue
try:
start_time = float(_split[0])
zoom_factor = float(_split[1])
duration = float(_split[2])
if start_time < 0:
start_time = 0
if duration < 0:
duration = 0
if zoom_factor <= 0:
zoom_factor = 1
except (ValueError, IndexError):
start_time = 0
duration = 0
zoom_factor = 1
if zoom_factor == 1:
continue
effect_index += 1
if duration == 0:
filter_args.append(f"{video_output_str}trim=start={start_time},scale=iw*{zoom_factor}:ih*{zoom_factor},crop=iw/{zoom_factor}:ih/{zoom_factor}:(iw-iw/{zoom_factor})/2:(ih-ih/{zoom_factor})/2,setpts=PTS-STARTPTS[v_eff{effect_index}]")
else:
zoom_expr = f"if(between(t,{start_time},{start_time + duration}),{zoom_factor},1)"
filter_args.append(f"{video_output_str}scale=iw*({zoom_expr}):ih*({zoom_expr}),crop=iw:ih:(iw-iw)/2:(ih-ih)/2[v_eff{effect_index}]")
video_output_str = f"[v_eff{effect_index}]"
elif effect.startswith("skip:"):
param = effect.split(":", 2)[1]
if param == '':
param = "0"
skip_seconds = float(param)
if skip_seconds > 0:
effect_index += 1
filter_args.append(f"{video_output_str}trim=start={skip_seconds},setpts=PTS-STARTPTS[v_eff{effect_index}]")
video_output_str = f"[v_eff{effect_index}]"
...
if self.resolution:
filter_args.append(f"{video_output_str}scale={self.resolution.replace('x', ':')}[v]")