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feat(reels): optimize quality to 1080p, increase text size to 64, and add stabilization toggle
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@@ -31,7 +31,7 @@ class ReelRequest(BaseModel):
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music_id: Optional[str] = None
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music_url: Optional[str] = None
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word_duration: float = 0.6
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font_size: int = 10
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font_size: int = 64
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music_volume: float = 0.25
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tts_enabled: bool = False
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tts_voice: str = "fr-FR-VivienneMultilingualNeural"
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@@ -359,7 +359,8 @@ async def process_reel(request: ReelRequest, x_api_key: str = Header(None)):
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if has_tts:
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# Use subtitles filter
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# Force style to look like TikTok/Reels text (No Black Box, just Outline)
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style = f"FontName=Arial,FontSize={request.font_size},PrimaryColour=&H00FFFFFF,OutlineColour=&H00000000,BorderStyle=1,Outline=3,Shadow=0,Bold=1,Alignment=2,MarginV=150"
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# Bigger font size (64 by default) and better vertical margin for 1080p
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style = f"FontName=Arial,FontSize={request.font_size},PrimaryColour=&H00FFFFFF,OutlineColour=&H00000000,BorderStyle=1,Outline=3,Shadow=0,Bold=1,Alignment=2,MarginV=300"
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# Escape path for FFmpeg filter
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vtt_path_str = str(tts_vtt_path).replace("\\", "/").replace(":", "\\:")
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video_filters.append(
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@@ -367,16 +368,12 @@ async def process_reel(request: ReelRequest, x_api_key: str = Header(None)):
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)
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else:
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# Standard Drawtext logic
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# Scale font for 1080p
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sanitized_text = request.text.replace("'", "").replace(":", "\\:")
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drawtext = f"drawtext=fontfile={FONT_PATH}:text='{sanitized_text}':fontcolor=white:fontsize={request.font_size}:borderw=3:bordercolor=black:x=(w-text_w)/2:y=h-text_h-150"
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drawtext = f"drawtext=fontfile={FONT_PATH}:text='{sanitized_text}':fontcolor=white:fontsize={request.font_size}:borderw=3:bordercolor=black:x=(w-text_w)/2:y=h-text_h-300"
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video_filters.append(drawtext)
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# Audio Mixing Strategy
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# We need to mix:
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# 1. Original Video Audio (0:a) - if exists
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# 2. Background Music (1:a) - if has_music
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# 3. TTS Voice (1:a or 2:a) - if has_tts
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# Detect if original video has audio
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has_original_audio = False
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try:
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@@ -400,67 +397,43 @@ async def process_reel(request: ReelRequest, x_api_key: str = Header(None)):
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filter_complex_parts = []
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mix_inputs = 0
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if has_music:
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cmd.extend(["-i", str(input_audio_path)])
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if has_tts:
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cmd.extend(["-i", str(tts_audio_path)])
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# Prepare inputs for mixing
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# ALWAYS ignore original video audio - only use music and/or TTS
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# (Original audio is never used per user request)
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if has_music:
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# Music volume - ensure it's properly scaled (0.0 to 1.0)
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# Apply volume more aggressively for noticeable effect
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music_vol = request.music_volume
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if has_tts:
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# Reduce music even more when TTS is active so voice is clear
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music_vol = music_vol * 0.3
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print(
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f"🎵 Music volume applied: {music_vol:.2f} (requested: {request.music_volume})"
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)
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filter_complex_parts.append(f"[1:a]volume={music_vol}[a1]")
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mix_inputs += 1
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if has_tts:
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tts_idx = 2 if has_music else 1
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# Voice needs to be loud and clear
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filter_complex_parts.append(f"[{tts_idx}:a]volume=1.5[a2]")
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mix_inputs += 1
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# Build mix command
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if mix_inputs > 0:
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inputs_str = ""
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# Note: Original audio is never mixed in (always muted)
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if has_music:
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inputs_str += "[a1]"
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if has_tts:
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inputs_str += "[a2]"
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# IMPORTANT: normalize=0 prevents amix from auto-adjusting volumes
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# which was causing volume slider to have no effect
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inputs_str = "".join(
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["[a1]" if has_music else "", "[a2]" if has_tts else ""]
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)
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filter_complex_parts.append(
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f"{inputs_str}amix=inputs={mix_inputs}:duration=first:dropout_transition=2:normalize=0[aout]"
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)
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cmd.extend(["-filter_complex", ";".join(filter_complex_parts)])
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# Map processed video and audio
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cmd.extend(["-map", "0:v", "-map", "[aout]"])
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else:
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# No audio at all, just video
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cmd.extend(["-map", "0:v"])
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# Apply Video Filters if any
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# Scaling to 1080x1920 (Vertical HD Reel Format)
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# unsharp is added to counteract any blurring from scaling
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format_filter = "scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2,unsharp=5:5:0.8:3:3:0.4"
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video_filters.insert(0, format_filter)
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if video_filters:
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cmd.extend(["-vf", ",".join(video_filters)])
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# -shortest not needed with duration=first in amix, but good practice if logic changes
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# actually duration=first in amix takes the length of the first input (usually video audio or music if mapped first)
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# We want the video length to dictate.
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# Easier: just use -shortest to cut audio to video length
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cmd.extend(["-shortest"])
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# Quality settings
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@@ -469,15 +442,15 @@ async def process_reel(request: ReelRequest, x_api_key: str = Header(None)):
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"-c:v",
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"libx264",
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"-preset",
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"medium",
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"slow",
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"-crf",
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"18", # High quality output (lower = better, 18 is visually lossless)
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"17",
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"-c:a",
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"aac",
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"-b:a",
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"192k",
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"-pix_fmt",
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"yuv420p", # Ensure compatibility
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"yuv420p",
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"-movflags",
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"+faststart",
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]
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