Hi.
I’m developing LiveStreamRecord Application to record a live.
I can record videos on mp4 correctly.
But mp4 file is VFR frame rate mode.
Is it possible to change CFR frame rate mode?
Regards
Kato
Hello there,
Wowza records what is sent in. You can use the Wowza Transcoder to achieve a consistent frame rate (as well as many other features):
How to set up and run Wowza Transcoder AddOn for live streaming
Wowza Transcoder AddOn Overview
Salvadore
Hi Kato,
Is the file a problem to use in anyway?
Looking at a file recorded with Wowza HTTPLiveStreamRecord (but not a Transcoder rendition) with MediaInfo I see the same lines. These were from a recording made from mpeg-ts stream produced by VLC
Frame rate mode : VFR
Frame rate mode : Variable
Frame rate : 23.212
Frame rate : 23.212 fps
Original frame rate : 24.000
Original frame rate : 24.000 fps
Minimum frame rate : 11.905
Minimum frame rate : 11.905 fps
Maximum frame rate : 24.390
Maximum frame rate : 24.390 fps
But when I playback the same file in RTMP client in Flash Builder, the onMetaData I see “videoframerate = 23.80952380952381”
FFprobe reported 23.21 fps for the same stream.
I cannot account for the slight difference in the reports of these 3rd party tools, but they agree closely.
In a recording made from FMLE with 15ps and Key frame Frequency set to 3 seconds, the lines are the same but the range is much narrower:
Frame rate mode : VFR
Frame rate mode : Variable
Frame rate : 15.026
Frame rate : 15.026 fps
Original frame rate : 15.000
Original frame rate : 15.000 fps
Minimum frame rate : 13.699
Minimum frame rate : 13.699 fps
Maximum frame rate : 16.129
Maximum frame rate : 16.129 fps
I also looked at recording from Wowza Transcoder renditions and it had similar info in MediaInfo. And I tried a recording with a template /Encode /KeyFrameInterval /FollowSource set to “false” on the VLC stream, but that no affect on the data shown in MediaInfo, it was the same range.
Richard
Has a solution to this been found? I’m streaming a file in Constant Frame Rate to Wowza, but Wowza records it to Variable Frame Rate. Is there a way to “force” it record in CBR?
Thanks!
Helder
Hello Savadore,
Thank you for reply,
Environment I’m using is as follows.
Regardless of the transcoding, Our problem is to be a VFR mode. Because our Filebase transcoder does not work correctly.
Therefore I would like to change CFR frame rate mode.
Any ideas?
[InputLiveSource]
Sony IPCamera: SNC-VB630(http://www.sony.co.uk/pro/product/video-security-ip-cameras-fixed/snc-vb630/overview/)
Source Video Info:
Codec: H.264
Resolution: 1920x1080 High@L4.1
Framerate: 30 fps
BitrateMode : CBR
Bitrate : 8Mbps
LiveSourceStreaming
Protocol: RTSP
WowzaStreamFile: vb630.stream(rtsp://IPAddress:554/media/video1)
[Wowza Record File(Information using MediaInfo)]
General
name : vb630.stream_720p.mp4
Format : MPEG-4
Format profile : Adobe Flash
Codec ID : f4v
File size : 26.4 MiB
Duration : 1Min 22Sec
Overall bit rate mode : VBR Mode
Overall bit rate : 2 688 Kbps
Video Info
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 Frames
Format settings, GOP : M=1, N=60
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1Min 22Sec
Bit rate mode : VBR mode
Bit rate : 2 589 Kbps
Maximum bit rate : 1 430 Kbps
Width : 1280
Height : 720
Display aspect ratio : 16:9
** Frame rate mode : VFR Mode **
** Frame rate : 29.970 fps **
** Original frame rate : 14.990 fps **
** Minimum frame rate : 29.412 fps **
** Maximum frame rate : 30.303 fps **
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bit
Scan type : Progressive(PPF)
Bits/(Pixel*Frame) : 0.094
Stream size : 25.5 MiB (96%)
Title : WowzaStreamingEngine
Thanks in advance.
Kato
Same here.
Encoder send CFR 50 and the downloaded file looks like:
Frame rate mode : Variable
Frame rate : 50.000 FPS
Minimum frame rate : 47.619 FPS
Maximum frame rate : 52.632 FPS