咨询将HandBrake预设转换为FFmpeg预设的可靠方法

Hey there, let's break down your HandBrake presets into equivalent FFmpeg commands step by step. I’ve mapped every key setting from your presets to FFmpeg’s command-line flags so you can replicate the exact behavior without guesswork.

Preset 1: PS4 English (GPU) (MP4 Output) #

This preset targets PS4 compatibility with GPU-accelerated H.265 encoding and optimized MP4 streaming. Here’s the matching FFmpeg command:

ffmpeg -i input_file \
  -map 0:v -map 0:a -map_chapters 0 \
  -vf "crop=iw:ih-556:0:278,decomb" \
  -c:v hevc_nvenc -preset medium -level 4.1 -crf 30 \
  -c:a copy -c:a:0 ac3 -b:a:0 160k \
  -f mp4 -movflags +faststart \
  output_file.mp4

Key Setting Mappings: #

• Track/Chapter Handling: -map 0:v -map 0:a -map_chapters 0 preserves all video/audio tracks and chapters (matches ChapterMarkers: true and AudioTrackSelectionBehavior: all).
• Cropping & Deinterlacing: -vf "crop=iw:ih-556:0:278,decomb" auto-crops 278px from the top/bottom of your input (matches PictureAutoCrop: true with fixed top/bottom values) and applies the decomb filter to remove interlacing (matches PictureDeinterlaceFilter: decomb).
• Video Encoding: -c:v hevc_nvenc -preset medium -level 4.1 -crf 30 uses NVIDIA GPU-accelerated H.265 encoding with a medium speed/quality preset, Level 4.1 compatibility, and CRF 30 quality control (matches VideoEncoder: nvenc_h265, VideoPreset: medium, VideoLevel: 4.1, and VideoQualitySlider: 30.0).
• Audio Handling: -c:a copy -c:a:0 ac3 -b:a:0 160k copies compatible audio tracks first, then falls back to AC3 encoding at 160kbps if copying isn’t possible (matches AudioEncoder: copy and AudioEncoderFallback: ac3).
• Container Optimization: -f mp4 -movflags +faststart outputs an MP4 file optimized for HTTP streaming (matches FileFormat: av_mp4 and Mp4HttpOptimize: true).

Preset 2: Movies (MKV Output) #

This preset focuses on retaining all media tracks (including subtitles) with GPU-accelerated H.265 encoding in an MKV container. Here’s the matching FFmpeg command:

ffmpeg -i input_file \
  -map 0:v -map 0:a -map 0:s -map_chapters 0 \
  -vf "crop=iw:ih-556:0:278,decomb" \
  -c:v hevc_nvenc -preset medium -level 4.0 -crf 30 \
  -c:a copy -c:a:0 ac3 -b:a:0 160k \
  -c:s copy \
  -f matroska \
  output_file.mkv

Key Differences from the PS4 Preset: #

• Subtitle Handling: -map 0:s -c:s copy preserves all subtitle tracks and copies them directly (matches SubtitleTrackSelectionBehavior: all).
• Video Level: -level 4.0 sets the H.265 Level to 4.0 instead of 4.1 (matches VideoLevel: 4.0).
• Container: -f matroska outputs an MKV file instead of MP4 (matches FileFormat: av_mkv).

Quick Notes: #

• The crop filter crop=iw:ih-556:0:278 is dynamic—it uses the input’s original width (iw) and height (ih) to apply the 278px top/bottom crop, so it works regardless of your source video’s resolution (aligns with PictureKeepRatio: true).
• FFmpeg defaults to variable frame rate (VFR) matching your source, so no extra flag is needed for VideoFramerateMode: vfr.
• If you need to tweak deinterlacing settings, you can add parameters to the decomb filter (e.g., decomb=preset=default to match HandBrake’s default decomb behavior).

备注：内容来源于stack exchange，提问作者Keitaro26