Some common ffmpeg commands, I tend to forget..

ffmpeg.md

cut sequence from mp4 video

ffmpeg -ss <start_time_hh:ii:ss> -i input.mp4 -to <length_in_hh:ii:ss_from_start> -c copy ./out.mp4
ffmpeg -ss 00:47:42 -i input.mp4 -to 00:01:49 -c copy ./out.mp4

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create thumbnail images from input video (@30fps)

ffmpeg -i input.mp4 -r 30/1 ./out-%03d.jpg

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concatinate multiple video files

ffmpeg -f concat -i filelist.txt -c:v copy ./out.mp4

Contents if filelist.txt:

file input1.mp4
file input2.mp4

Note: Must call ffmpeg in path of filelist.txt and use relative paths in filelist.txt!

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add blur to video

Blur video:

ffmpeg -i input.mp4 -vf "boxblur=5:1" ./out.mp4

Add blur overlay to specific area:

ffmpeg -i input.mp4 -filter_complex "[0:v]crop=<width_px>:<height_px>:<margin_left_px>:<margin_top_px>,boxblur=<chroma_level_1-9>[fg]; [0:v][fg]overlay=<margin_left_px>:<margin_top_px>[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart ./out.mp4
ffmpeg -i input.mp4 -filter_complex "[0:v]crop=120:40:60:40,boxblur=9[fg]; [0:v][fg]overlay=60:40[v]" -map "[v]" -map 0:a -c:v libx264 -c:a copy -movflags +faststart ./out.mp4

More examples (e.g. how to use masks)

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save RMTP video stream to local flv video

ffmpeg -i rtmp://web1.iptv-planet.com:81/live2/ -y -f flv ./out.flv

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save M3U8 HTTP video stream to local mp4 video

ffmpeg -i "http://example.com/playlist.m3u8" -c:v copy -bsf:a aac_adtstoasc ./out.mp4

Reference for "aac_adtstoasc"

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convert avi video to mp4 video

If you have libfaac:

# mpeg4 (native) -> mpeg4 (native)
ffmpeg -i input.avi -c:v libx264 -crf 19 -preset slow -c:a libfaac -b:a 192k -ac 2 out.mp4
ffmpeg -i input.avi -c:v libx264 -crf 19 -preset slow -c:a aac -strict experimental -b:a 192k -ac 2 out.mp4

If you don't have libfaac:

# mpeg4 (native) -> mpeg4 (native)
# mp3 (native) -> aac (native)
ffmpeg -i input.avi -acodec libfaac -b:a 192k -vcodec mpeg4 -b:v 1200k -flags +aic+mv4 ./out.mp4
ffmpeg -i input.avi -acodec aac -strict experimental -b:a 192k -vcodec mpeg4 -b:v 1200k -flags +aic+mv4 ./out.mp4

# mpeg4 (native) -> h264 (libx264)
ffmpeg -i input.avi -c:v libx264 -crf 22 -preset medium -c:a aac -strict experimental -b:a 192k -ac 2 ./out.mp4

# mpeg4 (native) -> h264 (libx264)
# mp3 (native) -> aac (native)
ffmpeg -i input.avi -c:v libx264 -crf 23 -profile:v high -r 30 -c:a aac -strict experimental -q:a 100 -ar 48000 out.mp4

# alternatives: -b:a 128k
#               -b:a 192k
#               -crf 19 -preset slow
#               -crf 22 -preset medium

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convert flv video to mp4 video

ffmpeg -i input.flv -vcodec copy -acodec copy ./out.mp4

ffmpeg -i input.flv -c:v copy -bsf:a aac_adtstoasc ./out.mp4

Reference for "aac_adtstoasc"

If the error Could not find tag for codec vp6f in stream #0, codec not currently supported in container occurs, try:

ffmpeg -i input.flv -c:v libx264 -crf 23 -preset medium -c:a aac -strict -2 -b:a 128k -ar 44100 -ac 2 ./out.mp4

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convert wmv video to mp4 video

ffmpeg -i file.wmv -vcodec libx264 -pix_fmt yuv420p -profile:v baseline -preset medium -crf 22 -movflags +faststart ./out.mp4

ffmpeg -i input.wmv -c:v libx264 -crf 23 -preset medium ./out.mp4

ffmpeg -i input.wmv -c:v libx264 -crf 23 -c:a libfaac -q:a 100 ./out.mp4

ffmpeg -i input.wmv -c:v libx264 -crf 23 -profile:v high -r 30 -c:a libfaac -q:a 100 -ar 48000 ./out.mp4

ffmpeg -i input.wmv -c:v libx264 -crf 23 -profile:v high -r 30 -c:a aac -strict experimental -q:a 100 -ar 48000 ./out.mp4

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Legend + References

Special FAAC switches & bitstream filters

FAAC is an MPEG-4 and MPEG-2 AAC encoder.

• -flag
  The flag command is used to by calling "-flag", followed by a single space and then all flags with a plus "+" or minus "-" sign preceding each indicating active or inactive flag respectively.
• +aic
  h263 advanced intra coding / mpeg4 ac prediction (Affects: Encoding, Video)
• +mv4
  Use four motion vector by macroblock (mpeg4) (Affects: Encoding, Video)
• -bsf:a aac_adtstoasc
  Convert MPEG-2/4 AAC ADTS to an MPEG-4 Audio Specific Configuration bitstream. Is required for example when copying an AAC stream from a raw ADTS AAC or an MPEG-TS container to MP4A-LATM, to an FLV file, or to MOV/MP4 files and related formats such as 3GP or M4A.