wader/fq
1
1
Fork 0
mirror of https://github.com/wader/fq.git synced 2024-11-26 21:55:57 +03:00
Code Issues Projects Releases Wiki Activity
b5a96e06e1
fq/format/riff/avi.md
Mattias Wadman d703321a7a avi: Add extended chunks support and option 
This is used for >1gb files. Disable decode will speed up
deocde a lot but will probably also produce some gaps as same
part of the movi chunks will not be reference by the indx index.
2023-10-20 15:55:19 +02:00

1.0 KiB
Raw Blame History

Samples

AVI has many redundant ways to index samples so currently .streams[].samples will only include samples the most "modern" way used in the file. That is in order of stream super index, movi ix index then idx1 index.

Extract samples for stream 1

$ fq '.streams[1].samples[] | tobytes' file.avi > stream01.mp3

Show stream summary

$ fq -o decode_samples=false '[.chunks[0] | grep_by(.id=="LIST" and .type=="strl") | grep_by(.id=="strh") as {$type} | grep_by(.id=="strf") as {$format_tag, $compression} | {$type,$format_tag,$compression}]' *.avi

Speed up decoding by disabling sample and extended chunks decoding

If your not interested in sample details or extended chunks you can speed up decoding by using:

$ fq -o decode_samples=false -o decode_extended_chunks=false d file.avi

References