القائمة
Extract, normalize, mix, and process audio tracks - audio manipulation and analysis
يُحدَّد Prompt الذي يراجع المصدر أولًا بشكل افتراضي. يمكنك التبديل إلى أمر مباشر أو تنزيل نسخة محلية.
اقرأ SKILL.md وأي ملفات مرافقة يعرضها SkillsMP قبل أن تقرر التثبيت.
التثبيت باستخدام Codex أو Claude انسخ هذا Prompt والصقه في Codex أو Claude أو مساعد آخر ليراجع صفحة Skill ويثبّتها لك.
يتجاوز الأمر المباشر Prompt المخصّص للمراجعة. افحص المصدر قبل تشغيله.
npx skills add https://github.com/benchflow-ai/skillsbench --skill ffmpeg-audio-processingيبقى الأمر في سطر واحد. مرّر أفقيًا لمراجعته كاملًا قبل النسخ.
تفضّل نسخة محلية؟ نزّل الملفات المتاحة حاليًا لدى SkillsMP.
SkillsBench contribution workflow. Use when: (1) Creating benchmark tasks, (2) Understanding repo structure, (3) Preparing PRs for task submission.
SkillsBench task authoring — walk a contributor from idea to submission-ready task following CONTRIBUTING.md and the task-implementation rubric. Use when the user wants to create a new SkillsBench task, scaffold a task from an existing workflow (notebook, Excel workbook, document, dataset), convert a prompt or a benchmark item into a SkillsBench task, write skills for a task, or prepare a SkillsBench PR. Pairs with `task-review` (run that as a self-check before submitting).
SkillsBench task PR review — classifies the task track (standard / research / multimodal), runs static policy checks against the track-specific rubric, benchmarks the task across oracle plus Claude and Codex (with and without skills), audits trajectories for cheating and skill invocation, and produces a `pr-N-task-timestamp-run.txt` review report alongside a `prN.zip` bundle of trajectories. Use when reviewing a SkillsBench task PR (by number, branch, or local task path), when the user asks to review a task, run benchmarks on a PR, audit a submission, classify a task as research or multimodal track, or prepare a comment to post on a SkillsBench PR.
عرض SKILL.md
استنادا إلى تصنيف SOC المهني
| name | ffmpeg-audio-processing |
| description | Extract, normalize, mix, and process audio tracks - audio manipulation and analysis |
Extract, normalize, mix, and process audio tracks from video files.
# Extract as MP3
ffmpeg -i video.mp4 -vn -acodec libmp3lame -q:a 2 audio.mp3
# Extract as AAC (copy, no re-encode)
ffmpeg -i video.mp4 -vn -c:a copy audio.aac
# Extract as WAV (uncompressed)
ffmpeg -i video.mp4 -vn -acodec pcm_s16le audio.wav
# Extract specific audio stream
ffmpeg -i video.mp4 -map 0:a:1 -c:a copy audio2.aac
# Normalize loudness (ITU-R BS.1770-4)
ffmpeg -i input.mp4 -af "loudnorm=I=-23:TP=-1.5:LRA=11" output.mp4
# Simple normalization
ffmpeg -i input.mp4 -af "volume=2.0" output.mp4
# Peak normalization
ffmpeg -i input.mp4 -af "volumedetect" -f null -
# Then use the detected peak to normalize
ffmpeg -i input.mp4 -af "volume=0.5" output.mp4
# Increase volume by 6dB
ffmpeg -i input.mp4 -af "volume=6dB" output.mp4
# Decrease volume by 3dB
ffmpeg -i input.mp4 -af output.mp4
ffmpeg -i input.mp4 -af output.mp4
# Extract left channel
ffmpeg -i stereo.mp3 -map_channel 0.0.0 left.mp3
# Extract right channel
ffmpeg -i stereo.mp3 -map_channel 0.0.1 right.mp3
# Convert stereo to mono
ffmpeg -i stereo.mp3 -ac 1 mono.mp3
# Convert mono to stereo
ffmpeg -i mono.mp3 -ac 2 stereo.mp3
# Replace audio track
ffmpeg -i video.mp4 -i audio.mp3 -c:v copy -map 0:v:0 -map 1:a:0 output.mp4
# Mix two audio tracks
ffmpeg -i video.mp4 -i audio2.mp3 \
-filter_complex "[0:a][1:a]amix=inputs=2:duration=first" \
-c:v copy output.mp4
# Mix with volume control
ffmpeg -i video.mp4 -i bgm.mp3 \
-filter_complex "[0:a]volume=1.0[voice];[1:a]volume=0.3[music];[voice][music]amix=inputs=2:duration=first" \
-c:v copy output.mp4
# Delay audio by 0.5 seconds
ffmpeg -i video.mp4 -itsoffset 0.5 -i video.mp4 \
-map 0:v -map 1:a -c copy output.mp4
# Using adelay filter (milliseconds)
ffmpeg -i input.mp4 -af "adelay=500|500" output.mp4
# Resample to 48kHz
ffmpeg -i input.mp4 -af "aresample=48000" output.mp4
# Resample audio only
ffmpeg -i input.mp4 -vn -af "aresample=48000" -ar 48000 audio.wav
# High-pass filter (remove low frequencies)
ffmpeg -i input.mp4 -af "highpass=f=200" output.mp4
# Low-pass filter (remove high frequencies)
ffmpeg -i input.mp4 -af "lowpass=f=3000" output.mp4
# Band-pass filter
ffmpeg -i input.mp4 -af "bandpass=f=1000:width_type=h:w=500" output.mp4
# Fade in/out
ffmpeg -i input.mp4 -af "afade=t=in:st=0:d=2,afade=t=out:st=8:d=2" output.mp4
# Detect volume levels
ffmpeg -i input.mp4 -af "volumedetect" -f null -
# Measure loudness (LUFS)
ffmpeg -i input.mp4 -af "ebur128=peak=true" -f null -
# Get audio statistics
ffprobe -v error -select_streams a:0 \
-show_entries stream=sample_rate,channels,bit_rate \
-of json input.mp4
# Concatenate audio files
ffmpeg -i "concat:audio1.mp3|audio2.mp3|audio3.mp3" -c copy output.mp3
# Using file list
# file 'audio1.mp3'
# file 'audio2.mp3'
ffmpeg -f concat -safe 0 -i list.txt -c copy output.mp3
-vn to disable video when extracting audio-map to select specific streams-af for audio filters-ac for channel count-ar for sample rate