From 32347f83a4180ede781ff61e0b11e3f745bc686e Mon Sep 17 00:00:00 2001 From: Henry Vindin Date: Thu, 26 Oct 2017 00:46:31 +1100 Subject: [PATCH] update to simplify the tldr page based on feedback --- pages/common/ffmpeg.md | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) diff --git a/pages/common/ffmpeg.md b/pages/common/ffmpeg.md index 8e1042b9c..858c2415c 100644 --- a/pages/common/ffmpeg.md +++ b/pages/common/ffmpeg.md @@ -4,7 +4,7 @@ - Extract the sound from a video and save it as MP3: -`ffmpeg -i {{video.mp4}} -vn -codec:audio {{sound}}.mp3` +`ffmpeg -i {{video.mp4}} -vn {{sound}}.mp3` - Convert frames from a video or GIF into individual numbered images: @@ -18,14 +18,10 @@ `ffmpeg -ss {{mm:ss}} -i {{video.mp4}} -frames 1 -s {{128x128}} -f image2 {{image.png}}` -- Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ 1250kbit (Gives a predictable file size at lower quality): +- Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ CRF 23: -`ffmpeg -i {{input_video}}.avi -codec:audio aac -b:audio 128k -codec:video libx264 -b:video 1250K {{output_video}}.mp4` +`ffmpeg -i {{input_video}}.avi -codec:audio aac -b:audio 128k -codec:video libx264 -crf 23 {{output_video}}.mp4` -- Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ CRF 23, Preset of very slow (Good trade off with file size/speed/quality), also allow faststart by moving the MOOV atom to the start of the file after processing: +- Remux MKV video to MP4. No re-encoding of video or audio streams: -`ffmpeg -i {{input_video}}.avi -codec:audio aac -b:audio 128k -codec:video libx264 -crf 23 --preset veryslow --movflags +faststart {{output_video}}.mp4` - -- Remux MKV video to MP4. No re-encoding of video or audio streams, convert subtitles stream to MP4 compatible codec: - -`ffmpeg -i {{inpupt_video}}.mkv -codec:audio copy -codec:video copy -codec:s mov_text --movflags +faststart {{output_video}}.mp4` +`ffmpeg -i {{inpupt_video}}.mkv -codec copy {{output_video}}.mp4`