PAL HDTV Capture playback in stuttery frame rate

[Guest]

Video mediainfo:

 

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Main@L4
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 23 min 18 s
Bit rate                                 : 8 424 kb/s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 25.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan type, store method                  : Separated fields
Scan order                               : Top Field First
Bits/(Pixel*Frame)                       : 0.163
Stream size                              : 1.37 GiB (94%)
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

 

It plays back in a very very stuttery frame rate but I'm not sure how to check what the frame rate actually is.

 

I've tested this on MULTIPLE devices and MULTIPLE browsers, here are my results:

- Chrome: Infinite loading circle indicator
- Firefox: Plays, in a stuttered frame rate
- Android TV: Plays perfectly fine

 

Just so you're aware, when playing this with MPV on a PC, and holding I, the frame rates state: "Specified 50.000, Estimated 25.000"
Every 2nd frame is a duplicate frame.

[Luke 42083]

Based on that i would guess it's direct playing but the browser video player is having difficulty with it. If you lower the in-app quality setting to force transcoding, how does that compare?

[Guest]

Based on that i would guess it's direct playing but the browser video player is having difficulty with it. If you lower the in-app quality setting to force transcoding, how does that compare?

Yeah if I force transcoding, the result is fine. But thats quite inconvenient, I have lots of content like this.

[Luke 42083]

Yeah if I force transcoding, the result is fine. But thats quite inconvenient, I have lots of content like this.

 

There's nothing we can do to make the direct play work, it's a problem with the browser video player. The best we can do is try to recover and automatically switch to transcoding.