ref: 3192dd937a71f737af84273806d91b306526cece
dir: /common/mp4v2/API_CHANGES/
Changes from 0.9.4 to 0.9.5
---------------------------
Added
MP4GetTrackAudioMpeg4Type()
Returns MPEG-4 Audio type (e.g. AAC, CELP, HXVC, MIDI, etc.)
MP4ReadSampleFromTime()
Variant of MP4ReadSample() that uses time instead of sample id
(basically MP4GetSampleIdFromTime() + MP4ReadSample())
MP4Info()
MP4FileInfo()
Returns summary info on tracks in file (from util/mp4info.cpp)
The following functions add support for mp4 authoring/editting:
MP4CloneTrack()
Make a copy of a specified track, without media samples
MP4CopyTrack()
Make a copy of a specified track, with or without media samples
MP4CopySample()
Make a copy of a specified media sample
MP4AddTrackEdit()
Add a track edit list element
MP4DeleteTrackEdit()
Delete a track edit list element
MP4GetTrackNumberOfEdits()
Return the number of track edit list elements
MP4GetTrackEditTotalDuration()
Return the total duration of the track edit list
MP4GetTrackEditStart()
Return the edit start time for the edit list element
MP4GetTrackEditMediaStart()
Return the media start time for the edit list element
MP4SetTrackEditMediaStart()
Set the media start time for the edit list element
MP4GetTrackEditDuration()
Return the edit list element duration
MP4SetTrackEditDuration()
Set the edit list element duration
MP4GetTrackEditDwell()
Return the edit list element dwell parameter, see man page
MP4SetTrackEditDwell()
Set the edit list element dwell parameter, see man page
MP4ReadSampleFromEditTime()
Apply the edit list timeline to reading a sample
MP4GetSampleIdFromEditTime()
Return the sample id for a specified time on the edit list timeline
Modified
MP4GetSampleIdFromTime()
Semantic change - now returns sample id corresponding
to specified time, not the sample id with the smallest positive
start time difference from the specified time.
Changes from 0.9.3 to 0.9.4
---------------------------
Added
MP4GetTrackVideoFrameRate()
Returns video frame rate (average rate if video is variable rate).
MP4GetTrackBitRate()
Returns track average bit rate in bits-per-second.
Changes from 0.9.2 to 0.9.3
---------------------------
Modified
MP4Optimize()
Second argument, newFileName, can now be NULL in which case
a temporary file is created for the results of the optimization.
Upon success, the existing file specified with the first argument
is overwritten with the optimized file.
MP4GetNumberOfTracks()
MP4FindTrackId()
Both have a new optional argument, subType, with default value 0.
The subType can be specified for audio and video tracks to
match only a specific encoding type. See man page for more details.
Added
MP4GetTrackVideoWidth()
Returns video width in pixels. See man page for caveat.
MP4GetTrackVideoHeight()
Returns video height in pixels. See man page for caveat.