PMP: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
header: | header: | ||
0-3 "pmpm" | |||
4-7 1 (version?) | |||
8-b video format (0 = MPEG-4 ASP, 1 = H.264) | |||
d-f number of packets (== number of frames?) | |||
10-13 video width | 10-13 video width | ||
14-17 video height | 14-17 video height | ||
18-1b time base num | 18-1b time base num | ||
1c-1f time base den | 1c-1f time base den | ||
20-23 audio format (0 = MP3, 1 = AAC) | 20-23 audio format (0 = MP3, 1 = AAC) | ||
24-27 number of audio streams (all the same format) | 24-27 number of audio streams (all the same format) | ||
28-2b ?? | 28-2b ?? | ||
2c-2f ?? | 2c-2f ?? | ||
30-33 sample rate | 30-33 sample rate | ||
34-37 channels - 1? | 34-37 channels - 1? | ||
38- list of packet sizes, 4 bytes each, lowest bit is keyframe flag | 38- list of packet sizes, 4 bytes each, lowest bit is keyframe flag | ||
following: data packets | following: data packets | ||
data packet: | data packet: | ||
0 number of audio packets (per audio stream) | 0 number of audio packets (per audio stream) | ||
1-4 ? | 1-4 ? | ||
5-8 ? | 5-8 ? | ||
9-c length of video data | 9-c length of video data | ||
audio packet sizes, 4 bytes each | audio packet sizes, 4 bytes each | ||
video data | video data | ||
audio data, AAC packets lack 7 bytes of AAC header | audio data, AAC packets lack 7 bytes of AAC header | ||
Latest revision as of 13:41, 4 November 2010
PMP format
All values are stored as little-endian
header:
0-3 "pmpm" 4-7 1 (version?) 8-b video format (0 = MPEG-4 ASP, 1 = H.264) d-f number of packets (== number of frames?) 10-13 video width 14-17 video height 18-1b time base num 1c-1f time base den 20-23 audio format (0 = MP3, 1 = AAC) 24-27 number of audio streams (all the same format) 28-2b ?? 2c-2f ?? 30-33 sample rate 34-37 channels - 1? 38- list of packet sizes, 4 bytes each, lowest bit is keyframe flag following: data packets
data packet:
0 number of audio packets (per audio stream) 1-4 ? 5-8 ? 9-c length of video data audio packet sizes, 4 bytes each video data audio data, AAC packets lack 7 bytes of AAC header