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56 lines
1.6 KiB
Plaintext
Executable File
56 lines
1.6 KiB
Plaintext
Executable File
#!/usr/bin/env fq -d mp4 -f
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# TODO: esds, make fancy printer? shared?
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# TODO: handle -1 media_time
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# TODO: fragmented mp4
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# root
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# moov
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# mvhd (movie header)
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# trak (track)
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# mdia
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# mdhd (media header)
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# hdlr (handler?)
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# minf
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# stbl
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# stsd (sample description)
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# elst (edit list)
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( first(.boxes[] | select(.type == "moov")?)
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| first(.boxes[] | select(.type == "mvhd")?) as $mvhd
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| {
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duration: $mvhd.duration,
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time_scale: $mvhd.time_scale,
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duration_s: ($mvhd.duration / $mvhd.time_scale),
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tracks:
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[ .boxes[]
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| select(.type == "trak")
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| first(.. | select(.type == "mdhd")?) as $mdhd
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| first(.. | select(.type == "hdlr")?) as $hdlr
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| first(.. | select(.type == "stsd")?) as $stsd
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| first(.. | select(.type == "elst")?) as $elst
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| first(.. | select(.type == "stts")?) as $stts
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| ([$stts.entries[] | .count * .delta] | add) as $stts_sum
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| {
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component_type: $hdlr.component_subtype,
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# the sample descriptors are handled as boxes by the mp4 decoder
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data_format: $stsd.boxes[0].type,
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media_scale: $mdhd.time_scale,
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edit_list:
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[ $elst.entries[]
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| {
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track_duration: .segment_duration,
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media_time: .media_time,
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track_duration_s: (.segment_duration / $mvhd.time_scale),
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media_time_s: (.media_time / $mdhd.time_scale)
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}
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],
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stts: {
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sum: $stts_sum,
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sum_s: ($stts_sum / $mdhd.time_scale)
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}
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}
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]
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}
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)
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