Hi,
We’ve been noticing an issue with choppy playback for movies recorded with an iPhone. This happens on any version of RV newer than RV-7.3.4, including RV-7.9 and RV-2021.
Some info about the codec:
General
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 0000.00 (qt )
File size : 82.2 MiB
Duration : 1 min 59 s
Overall bit rate : 5 748 kb/s
Encoded date : UTC 2020-10-07 03:14:23
Tagged date : UTC 2020-10-07 03:16:23
Writing library : Apple QuickTime
com.apple.quicktime.creationdate : 2020-10-07T03:14:23Z
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 1 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 59 s
Bit rate : 5 490 kb/s
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 24.000 FPS
Minimum frame rate : 24.000 FPS
Maximum frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.248
Stream size : 78.5 MiB (96%)
Title : Core Media Video
Encoded date : UTC 2020-10-07 03:14:23
Tagged date : UTC 2020-10-07 03:16:23
Codec configuration box : avcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 min 59 s
Source duration : 2 min 0 s
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 3.57 MiB (4%)
Source stream size : 3.57 MiB (4%)
Title : Core Media Audio
Encoded date : UTC 2020-10-07 03:14:23
Tagged date : UTC 2020-10-07 03:16:23
Is this a known issue? I’ve heard that AVC is a relatively new codec and RV doesn’t offer support for it yet. If that is the case, is there perhaps a known fix or workaround for this issue? Perhaps we have to convert the video, or change something in iPhone settings?
Thank you!