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REF
- about -ss before -i and after -i difference, which can make cut video works or not works
FFmpeg - the core command app of open source transcoder
- free and available as command line software for windows, mac, linux
- download: http://ffmpeg.org/
- input video format: 3GP, AVI, FLV, Matroska, MP4, MPEG-PS, Ogg, QuickTime, SVCD, TS, TOD, VCD, WMV
- output video format: 3GP, AVI, Blu-ray, DVD, FLV, MKV, MP4, MPEG-PS, Ogg, mov, super VCD, TS, VCD, Webm, WMV
- Doc: https://ffmpeg.org/
Common Convertion
- disable ffmpeg feedback by adding in 1st flag
ffmpeg -hide_banner -loglevel panic -i test.jpg test.png
- MTS 50i interlaced video to progress video 50p (ref: link)
ffmpeg -i in.MTS -vf yadif=1 -acodec ac3 -ab 192k -vcodec mpeg4 -f mp4 -y -qscale 0 out.mp4
- image sequence to mp4 in cmd (25fps, FHD size, pic.0001.png naming, H264, quality 15-25)
ffmpeg -r 25 -f image2 -s 1920x1080 -i pic.%04d.png -vcodec libx264 -crf 25 -pix_fmt yuv420p test.mp4
- image sequence to MOV with start frame detection (e.g h264 mov, prores 422)
- h264 mov
import os,glob,shlex,subprocess imgSeqPath = 'D:/ExamplePathRoot/ExampleName/ExampleVersion/example.%04d.exr' # 0001 format image names movPath = 'D:/OutputMov/ExampleName/example.mov' file_list = glob.glob( os.path.join(os.path.dirname(imgSeqPath), re.sub('\.?%0\d+d$', '*', base) + ext )) if len(file_list) == 0: return prefix, ext = os.path.splitext(os.path.basename(file_list[0])) start_number = re.findall('\d+$', prefix)[0] enc = 'D:/toolPath/ffmpeg.exe -y -r 24 -start_number {0} -i "{1}" -an -vcodec libx264 -preset slow -crf 22 -threads 0 "{2}"'.format(start_number, imgSeqPath, movPath) subprocess.Popen(shlex.split(enc), stdout=subprocess.PIPE, stderr=subprocess.PIPE)
- proRes422
# profile: 0 proxy, 1 LT, 2 SQ, 3 HQ # pix format: yuv422p10le , for 444, use yuva444p10le # -qscale:v 11: best 0-32 worst # ref: https://trac.ffmpeg.org/wiki/Encode/VFX enc = 'D:/toolPath/ffmpeg.exe -y -r 24 -start_number %s -i "%s" -an -c:v prores_ks -profile:v 2 -pix_fmt yuv422p10le -vendor ap10 "%s"' % (start_number, imgSeqPath, movPath)
- image conversion and resize (width 320px)
ffmpeg -i input.jpg -vf scale=320:-1 output_320.png
- convert mov with alpha to webm with alpha
ffmpeg.exe -i transparent_video_audio.mov -c:v libvpx-vp9 -pix_fmt yuva420p -b:v 2000k out.webm
- convert mpg to mov h264
ffmpeg.exe -i "d:\out\me.mpg" -c:v libx264 -c:a libfaac -crf 20 -preset:v veryslow "d:\out\me_out.mov"