doc/bitstream_filters: document dump_extra

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Stefano Sabatini 2013-07-16 15:34:02 +02:00
parent b405f4e916
commit 34322ab27a
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@ -32,6 +32,32 @@ Remove zero padding at the end of a packet.
@section dump_extra @section dump_extra
Add extradata to the beginning of the filtered packets.
The additional argument specifies which packets should be filtered.
It accepts the values:
@table @samp
@item a
add extradata to all key packets, but only if @var{local_header} is
set in the @option{flags2} codec context field
@item k
add extradata to all key packets
@item e
add extradata to all packets
@end table
If not specified it is assumed @samp{k}.
For example the following @command{ffmpeg} command forces a global
header (thus disabling individual packet headers) in the H.264 packets
generated by the @code{libx264} encoder, but corrects them by adding
the header stored in extradata to the key packets:
@example
ffmpeg -i INPUT -map 0 -flags:v +global_header -c:v libx264 -bsf:v dump_extra out.ts
@end example
@section h264_mp4toannexb @section h264_mp4toannexb
Convert an H.264 bitstream from length prefixed mode to start code Convert an H.264 bitstream from length prefixed mode to start code