| Offset | Size | Name | Notes |
|---|
| 0 | 2 | version | 5 |
| 2 | 2 | unknown | Always 1; possibly a version number specifically for this header |
| 4 | 4 | struct_size | Right now, 32. The meaning is a guess; treated as a magic number by the RTV code |
| 8 | 4 | num_channels_1 | The number of ReplayChannels in the GuideSnapshot file |
| 12 | 4 | num_channels_2 | In a valid exported GuideSnapshot file, will always match num_channels_1. This copy is incremented while the ReplayShow records are being exported, to keep track of how far in the process the export is. |
| 16 | 4 | group_data_offset | Offset in bytes from the beginning of the file for the start of the GroupData record. Should always be 32 for this version of the file format. |
| 20 | 4 | channel_offset | Offset in bytes from the beginning of the file for the beginning of the first ReplayChannel record. Should always be 808 for this version of the file format. |
| 24 | 4 | show_offset | Offset in bytes from the beginning of the file for the beginning of the first ReplayShow record. Should always be 808 + 624 * num_channels_1 for this version of the file format. |
| 28 | 4 | GuideFlags | This isn't initialized before being written; undefined bits should be ignored (for this version of the file format, at least) |
| Offset | Size | Name | Notes |
|---|
| 0 | 512 | replay_show | A ReplayShow structure; for time-based recordings, the time, channel, etc. come from here |
| 512 | 60 | replay_theme | A ReplayTheme structure; for theme-based and zone-based recordings, the search parameters come from here. |
| 572 | 4 | channel_id | channel ID/channel creation timestamp |
| 576 | 4 | category | The category 'tab' this channel is in, as a bitmask (1 << category index) |
| 580 | 4 | channel_type | The over-all ChannelType (Seems Incorrect!) |
| 584 | 4 | keep | The number of episodes to keep |
| 588 | 4 | quality | The QualitySetting |
| 592 | 4 | stored | The number of episodes currently stored |
| 596 | 1 | days_of_week | The DaysOfWeek to record on |
| 597 | 1 | after_padding | The number of minutes extra to record after the scheduled end of the program |
| 598 | 1 | before_padding | The number of minutes extra to record before the scheduled end of the program |
| 599 | 1 | flags | ChannelFlags -- not well understood |
| 600 | 8 | timereserved | Total Time Allocated (New) |
| 608 | 48 | label | A NUL-terminated string to use as a label for this channel |
| 656 | 32 | u32 reserved_for_don[7] | This seems to have been all given back to Don (?). this is actually an 8-member array, not 7, with seconds_allocated reserved_for_don[7], but since it's used it's no longer reserved, no matter what the actual source apparently says |
| 688 | 8 | space_allocated | The number of disk bytes reserved; 0 for non-guaranteed |
| 696 | 4 | unknown1 |
| 700 | 4 | unknown2 |
| 704 | 4 | unknown3 |
| 708 | 4 | unknown4 |
| N/A | 4 | seconds_allocated | This seems to be ... missing (or changed to timereserved) |
| Offset | Size | Name | Notes |
|---|
| 0 | 4 | channel_id | The channel_id for the ReplayChannel this show is part of |
| 4 | 4 | show_id | The primary key for this ReplayShow; also, the time the recording started, as a TimeT |
| 8 | 4 | input_source | The InputSource for this recording |
| 12 | 4 | quality | The QualitySetting for this recording |
| 16 | 4 | guaranteed | 0 = no, 0xffffffff = yes |
| 20 | 4 | show_flags | The ShowFlags for this recording |
| 24 | 80 | channel | the Channel for this recording |
| 104 | 272 | program | the Program for this recording |
| 376 | 4 | ivs_status | IvsStatus value (Always 1 in a ReplayShow snapshot, 0 or 2 in a ReplayChannel snapshot.) |
| 380 | 4 | remote_guide_id | Always 0 in a snapshot; the show_id on the original ReplayTV, for IVS or LAN shows |
| 384 | 4 | download_id | Valid only during actual transfer of index or mpeg file; format/meaning still unknown |
| 388 | 4 | times_sent | The number of times this program has been sent with InternetVideoSharing |
| 392 | 4 | seconds | The actual duration of the recording |
| 396 | 4 | GOP_count | The number of GOPs in the recording |
| 400 | 4 | GOP_highest | Always 0 in a snapshot; the index of the highest # GOP viewed |
| 404 | 4 | GOP_last | Always 0 in a snapshot; the index of the most recent GOP viewed |
| 408 | 4 | checkpointed | 0 in possibly-out-of-date in-memory copies; always -1 in snapshots |
| 412 | 4 | intact | 0xffffffff in a snapshot; 0 means a deleted show |
| 416 | 4 | upgrade_flag | Set only when upgrading software versions, and only in the ReplayShow structure inside a show-based ReplayChannel; if set, the upgrade procedure computes fields such as ReplayChannel's space_allocated, based on the actual space used. Cleared again before the upgrade is finished, so this is never exposed. |
| 420 | 4 | sort_hint | The (0-based) index of this show in its ReplayChannel; this is, for the 4th show listed in a given ReplayChannel, this is 3 |
| 424 | 2 | unused1 | not preserved when padding values are set, presumably not used |
| 426 | 1 | before_padding | Minutes of padding recorded before the scheduled start of the show |
| 427 | 1 | after_padding | Minutes of padding recorded after the scheduled start of the show |
| 428 | 8 | index_size | size of .ndx file. for IVS-downloading/downloaded shows |
| 436 | 8 | mpeg_size | size of .mpg file, for IVS-downloading/downloaded shows |
| 444 | 68 | reserved | |