[FFmpeg-user] ffprobe outputs frame_rate=90000/1

[Marton Balint]

On Mon, 2 Aug 2021, David Mueller IWS. wrote:

> Hello,
>
> when checking the framerate of an h264 stream with ffprobe I'm getting an output of  r_frame_rate=90000/1.
> Any idea why ffprobe outputs this value?

Maybe because the video PID has no packets so there is no way to determine 
the proper frame rate, therefore ffprobe makes the best guess based on the 
mpegts time base, which is 1/90000.

Regards,
Marton

>
> Here is the command I'm executing:
>
> ffprobe.exe -show_format -show_streams udp://172.19.253.10:1100
>
> And this is the full output:
>
> [STREAM]
> index=0
> codec_name=h264
> codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
> profile=High
> codec_type=video
> codec_time_base=0/2
> codec_tag_string=[27][0][0][0]
> codec_tag=0x001b
> width=640
> height=360
> coded_width=640
> coded_height=368
> closed_captions=0
> has_b_frames=0
> sample_aspect_ratio=N/A
> display_aspect_ratio=N/A
> pix_fmt=yuv420p
> level=50
> color_range=unknown
> color_space=unknown
> color_transfer=unknown
> color_primaries=unknown
> chroma_location=unspecified
> field_order=progressive
> timecode=N/A
> refs=1
> is_avc=false
> nal_length_size=0
> id=0x100
> r_frame_rate=90000/1
> avg_frame_rate=0/0
> time_base=1/90000
> start_pts=538119
> start_time=5.979100
> duration_ts=N/A
> duration=N/A
> bit_rate=N/A
> max_bit_rate=N/A
> bits_per_raw_sample=8
> nb_frames=N/A
> nb_read_frames=N/A
> nb_read_packets=N/A
> DISPOSITION:default=0
> DISPOSITION:dub=0
> DISPOSITION:original=0
> DISPOSITION:comment=0
> DISPOSITION:lyrics=0
> DISPOSITION:karaoke=0
> DISPOSITION:forced=0
> DISPOSITION:hearing_impaired=0
> DISPOSITION:visual_impaired=0
> DISPOSITION:clean_effects=0
> DISPOSITION:attached_pic=0
> DISPOSITION:timed_thumbnails=0
> [/STREAM]
> [FORMAT]
> filename=udp://172.125.1.2:1100
> nb_streams=1
> nb_programs=1
> format_name=mpegts
> format_long_name=MPEG-TS (MPEG-2 Transport Stream)
> start_time=5.979100
> duration=N/A
> size=N/A
> bit_rate=N/A
> probe_score=50
> [/FORMAT]
>
> Kind regards
>
> David
>
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