Export video with 59,94 FPS

[Drexel]

Hello,

I have a source video file with 59,94006 FPS according to VLC Player or 60000/1001 fps as ffprobe shows it. I want to edit it and export it with exact the same frame rate to avoid any stutterings etc. So on the “Video” tab I enter 59,940 in the Frames/sec field, more digits cannot be entered. And I see that in the “Other” tab that the parameters
frame_rate_num=60000
frame_rate_den=1001
are added which looks pretty good.

But in the output video I get 59,941256 in VLC Player or 19001/317 fps as ffprobe show it. So what am I doing wrong to get the original 60000/1001 fps?

Thanks in advance,
Matthias

[shotcut]

@Drexel

on the “Video” tab I enter 59,940 in the Frames/sec field, more digits cannot be entered

You are using an old version. v18.10.08 is the latest:

After exporting ffprobe:

Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709/unknown/bt709), 1920x1080 [SAR 1:1 DAR 16:9], 53689 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)

[Drexel]

Hey! Thanks for your quick response, your support is really great. I downloaded the latest version and I can enter more digits in the targe frames/sec field. But the result is still the same it is 59,941256 fps in VLC Player and not 59,94006. With a simple ffprobe query without any paramters it shows 59,94 fps. But with this query to get the axeact framerate:

ffprobe.exe -v 0 -of csv=p=0 -select_streams 0 -show_entries stream=r_frame_rate INPUTFILEPATH

I get 19001/317 and not 60000/1001 how it should be.

[shotcut]

From the job XML of my test:

  <profile width="1920" height="1080" sample_aspect_den="1" frame_rate_den="1001" display_aspect_den="9" colorspace="709" sample_aspect_num="1" frame_rate_num="60000" display_aspect_num="16" progressive="1" description="automatic"/>
  <consumer threads="0" f="mp4" g="300" width="1920" aspect="1.77778" progressive="1" crf="21" preset="faster" ar="48000" vcodec="libx264" target="/Users/ddennedy/Movies/test.mp4" rescale="bilinear" height="1080" mlt_service="avformat" channels="2" deinterlace_method="yadif" acodec="aac" movflags="+faststart" bf="3" real_time="-4" top_field_first="2" ab="384k"/>

As you can see, only framerate of 60000/1001 is supplied. From Shotcut > Properties > More Info…, which uses ffprobe:

r_frame_rate=60000/1001
avg_frame_rate=60000/1001

I did not have a 59.94 clip on this laptop while out of town and used Settings > Video Mode > HD 1080p 59.94 fps to make a test. What does your job XML show for both profile and consumer?

If I make another testing using Automatic with 29.97 clip but enter into the Export panel 59.94006, then I still get the intended result:

  <profile width="1920" height="1080" sample_aspect_den="1" frame_rate_den="1001" display_aspect_den="1080" colorspace="709" sample_aspect_num="1" frame_rate_num="30000" display_aspect_num="1920" progressive="1" description="automatic"/>
  <consumer frame_rate_den="1001" threads="0" f="mp4" g="150" width="1920" frame_rate_num="60000" aspect="1.77778" progressive="1" crf="21" preset="faster" ar="48000" vcodec="libx264" target="/Users/ddennedy/Movies/test.mp4" rescale="bilinear" height="1080" mlt_service="avformat" channels="2" deinterlace_method="yadif" acodec="aac" movflags="+faststart" bf="3" real_time="-4" top_field_first="2" ab="384k"/>
...
r_frame_rate=60000/1001
avg_frame_rate=60000/1001

So, I do not know how to reproduce it, and you might have made an incorrect test, or you need to submit a patch.

[Drexel]

So this is the export XML:
<profile display_aspect_num="1920" frame_rate_num="60000" sample_aspect_den="1" height="1080" display_aspect_den="1080" width="1920" frame_rate_den="1001" progressive="1" sample_aspect_num="1" colorspace="709" description="automatic"/>

<consumer channels="2" threads="0" deinterlace_method="yadif" crf="16" real_time="-3" bf="2" aspect="1,77778" preset="fast" mlt_service="avformat" width="2048" vcodec="libx264" f="matroska" x264opts="aq-strength=1,00:colorprim=bt709:transfer=bt709:colormatrix=bt709:keyint=6000:min-keyint=60" top_field_first="0" g="13" target="E:/Lets Play/SpiderMan/2 Edited/05-06/59fpstest59.mkv" progressive="1" aq="11" ar="44100" height="1152" rescale="hyper" movflags="+faststart" acodec="vorbis"/>

And here the result from Shotcut > Properties > More Info… of the rendered video:
r_frame_rate=19001/317
avg_frame_rate=19001/317

[shotcut]

I reproduce it with f=matroska. It is my understanding that Matroska does not typically store the frame rate information for H.264, and tools gather it from the video codec timing. Here is a previous discussion about that matter:

How Can I Make Sure That The Frame Rate Is "Constant"?

Hello. I was exporting a project as a matroska AKA mkv file (I picked the first one listed as there are two listed apparently in error) but when the file finished and I was looking at the specs, it came back with the info in Media Player Classic saying that the Frame Rate Mode is Variable instead of my preferred Constant. The original file is not Variable it is Constant. How do I make sure that the export file comes out as Constant instead of Variable? Programs like Handbrake ha…

Next, I used ffmpeg that comes with Shotcut to make a similar encoding, and it reports the same result:

$ ffmpeg -i GOPR0395.MP4 -t 10 -strict experimental -c:a vorbis -ar 4410 0 test.mkv
...
$ ffprobe -v 0 -of csv=p=0 -select_streams 0 -show_entries stream=r_frame_rate test.mkv
19001/317

[Drexel]

Indeed with mp4 container it’s ok. Thanks for clarification.