[FFmpeg-trac] #11584(ffprobe:new): ffprobe returns "n/a" for bitrate in opus audio file

[FFmpeg]

#11584: ffprobe returns "n/a" for bitrate in opus audio file
------------------------------------+-----------------------------------
             Reporter:  jr_clifton  |                    Owner:  (none)
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  ffprobe
              Version:  6.1.1       |               Resolution:
             Keywords:  ffprobe     |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+-----------------------------------
Description changed by jr_clifton:

Old description:

> I try to query the bitrate of the opus encoded audio file and it gives me
> N/A for the bitrate.
>
> $  ffprobe -v error -show_format -show_streams cath.webm  (see the putput
> bellow)
>
> I understand that this is probably due to the fact that this info is not
> written in the header. Would it be possible for ffprobe to calculate this
> data internally? I know it could be done by doing this:
>
> ffprobe -v error -select_streams a:0 -show_entries
> packet=size,duration_time -of default=noprint_wrappers=1:nokey=1
> cath.webm
>
> And then Sum the sizes, sum the durations, and divide the summed size by
> summed duration.
>
> Could this enhancement be implemented in ffprobe?
>
> Output of ffprobe:
>
> [STREAM]
> index=0
> codec_name=opus
> codec_long_name=Opus (Opus Interactive Audio Codec)
> profile=unknown
> codec_type=audio
> codec_tag_string=[0][0][0][0]
> codec_tag=0x0000
> sample_fmt=fltp
> sample_rate=48000
> channels=2
> channel_layout=stereo
> bits_per_sample=0
> initial_padding=312
> id=N/A
> r_frame_rate=0/0
> avg_frame_rate=0/0
> time_base=1/1000
> start_pts=-7
> start_time=-0.007000
> duration_ts=N/A
> duration=N/A
> bit_rate=N/A
> max_bit_rate=N/A
> bits_per_raw_sample=N/A
> nb_frames=N/A
> nb_read_frames=N/A
> nb_read_packets=N/A
> extradata_size=19
> DISPOSITION:default=1
> 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
> DISPOSITION:non_diegetic=0
> DISPOSITION:captions=0
> DISPOSITION:descriptions=0
> DISPOSITION:metadata=0
> DISPOSITION:dependent=0
> DISPOSITION:still_image=0
> DISPOSITION:multilayer=0
> TAG:language=eng
> [/STREAM]
> [FORMAT]
> filename=cath.webm
> nb_streams=1
> nb_programs=0
> nb_stream_groups=0
> format_name=matroska,webm
> format_long_name=Matroska / WebM
> start_time=-0.007000
> duration=933.261000
> size=14677429
> bit_rate=125816
> probe_score=100
> TAG:encoder=google/video-file
> [/FORMAT]

New description:

 I try to query the bitrate of the opus encoded audio file and it gives me
 N/A for the bitrate.

 $  ffprobe -v error -show_format -show_streams cath.webm  (see the putput
 bellow)

 I understand that this is probably due to the fact that this info is not
 written in the header. Would it be possible for ffprobe to calculate this
 data internally? I know it could be done by doing this:

 ffprobe -v error -select_streams a:0 -show_entries
 packet=size,duration_time -of default=noprint_wrappers=1:nokey=1 cath.webm

 And then Sum the sizes, sum the durations, and divide the summed size by
 summed duration.

 Could this be implemented in ffprobe?

 Output of ffprobe:

 [STREAM]
 index=0
 codec_name=opus
 codec_long_name=Opus (Opus Interactive Audio Codec)
 profile=unknown
 codec_type=audio
 codec_tag_string=[0][0][0][0]
 codec_tag=0x0000
 sample_fmt=fltp
 sample_rate=48000
 channels=2
 channel_layout=stereo
 bits_per_sample=0
 initial_padding=312
 id=N/A
 r_frame_rate=0/0
 avg_frame_rate=0/0
 time_base=1/1000
 start_pts=-7
 start_time=-0.007000
 duration_ts=N/A
 duration=N/A
 bit_rate=N/A
 max_bit_rate=N/A
 bits_per_raw_sample=N/A
 nb_frames=N/A
 nb_read_frames=N/A
 nb_read_packets=N/A
 extradata_size=19
 DISPOSITION:default=1
 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
 DISPOSITION:non_diegetic=0
 DISPOSITION:captions=0
 DISPOSITION:descriptions=0
 DISPOSITION:metadata=0
 DISPOSITION:dependent=0
 DISPOSITION:still_image=0
 DISPOSITION:multilayer=0
 TAG:language=eng
 [/STREAM]
 [FORMAT]
 filename=cath.webm
 nb_streams=1
 nb_programs=0
 nb_stream_groups=0
 format_name=matroska,webm
 format_long_name=Matroska / WebM
 start_time=-0.007000
 duration=933.261000
 size=14677429
 bit_rate=125816
 probe_score=100
 TAG:encoder=google/video-file
 [/FORMAT]

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Ticket URL: <https://trac.ffmpeg.org/ticket/11584#comment:2>
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