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Support multiline captions

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This commit is contained in:
hbrain 2026-05-25 00:05:57 +00:00
parent aafd856ecc
commit cfc7e4d32c
2 changed files with 20 additions and 14 deletions
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1
README.md
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@ -111,6 +111,7 @@ Optional per-file captions are supported:
```text
IMG_001.jpg: Eiffel Tower
IMG_002.jpg: Louvre
IMG_003.jpg: First line | Second line
```
## Usage

19
movmaker.py
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@ -451,7 +451,7 @@ def build_video(
filters.append(f"[{current}]copy[{title_label}]")
caption_label = title_label
caption_size = subtitle_font_size if title_lines else max(40, height // 18)
caption_size = max(16, int((subtitle_font_size if title_lines else max(40, height // 18)) * 0.5))
for idx, caption in enumerate(captions):
if not caption:
continue
@ -474,16 +474,21 @@ def build_video(
f"if(lt(t\\,{start + caption_fade:.3f})\\,(t-{start:.3f})/{caption_fade:.3f}\\,"
f"if(lt(t\\,{end - caption_fade:.3f})\\,1\\,({end:.3f}-t)/{caption_fade:.3f}))"
) if caption_fade > 0 else "1"
next_label = f"caption{idx}"
caption_lines = [line.strip() for line in caption.split("|") if line.strip()]
line_gap = int(caption_size * 1.2)
block_height = line_gap * (len(caption_lines) - 1)
for line_idx, caption_line in enumerate(caption_lines):
y_expr = f"h-text_h-62-{block_height - line_idx * line_gap}"
next_label = f"caption{idx}_{line_idx}"
filters.append(
f"[{caption_label}]drawtext=fontfile='{stamp_bold_font}':text='{drawtext_escape(caption)}':x=(w-text_w)/2:y=h-text_h-62:"
f"fontsize={caption_size}:fontcolor=white:borderw=1:bordercolor=black:"
f"[{caption_label}]drawtext=fontfile='{stamp_bold_font}':text='{drawtext_escape(caption_line)}':x=(w-text_w)/2:y={y_expr}:"
f"fontsize={caption_size}:fontcolor=white:borderw=0:shadowcolor=black@0.75:shadowx=2:shadowy=2:"
f"alpha='{caption_alpha}':enable='between(t,{start:.3f},{end:.3f})'[{next_label}]"
)
bold_label = f"caption{idx}b"
bold_label = f"caption{idx}_{line_idx}b"
filters.append(
f"[{next_label}]drawtext=fontfile='{stamp_bold_font}':text='{drawtext_escape(caption)}':x=(w-text_w)/2+1:y=h-text_h-62:"
f"fontsize={caption_size}:fontcolor=white:borderw=1:bordercolor=black:"
f"[{next_label}]drawtext=fontfile='{stamp_bold_font}':text='{drawtext_escape(caption_line)}':x=(w-text_w)/2+1:y={y_expr}:"
f"fontsize={caption_size}:fontcolor=white:borderw=0:shadowcolor=black@0.75:shadowx=2:shadowy=2:"
f"alpha='{caption_alpha}':enable='between(t,{start:.3f},{end:.3f})'[{bold_label}]"
)
caption_label = bold_label