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magicrescue
flv
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File flv of Package magicrescue
# Extracts FLV files (Flash Video). # Contributed by John Zoidberg <zohn.joidberg@gmail.com> # Depends on MPlayer's mencoder: http://www.mplayerhq.hu/ 0 string FLV\x01 #4 int32 05000000 ffffffff 4 int32 00000000 f0ffffff 8 int32 09000000 ffffffff 12 int32 00000000 ff000000 extension flv # mencoder will keep reading after the flv ends, so we use tools/safecat to # stop it when it's not outputting useful things anymore. command safecat -d 30M -u 200M -t 200M "$1" | mencoder -of lavf -nocache -o "$1" -ovc copy -oac copy - min_output_file 102400 # A few notes about the recipe: # 1) It is based on the official FLV file specification from # http://www.adobe.com/devnet/flv/ # 2) I assume FLV version 1 + audio tags present + video tags present # # This leads to a header of the form # # header # # 46 4C 56 01 05 00 00 00 09 # # header + start of file body # # 46 4C 56 01 05 00 00 00 09 00 00 00 00 # # However, I found some FLV files which started like this instead: # # 46 4C 56 01 0D 00 00 00 09 00 00 00 00 # 0D=00001101 is contrary to the official file specification. # Only 00,01,04 or 05 should be possible.
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