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ffmpeg: how to get program descriptions from transmission stream?

Super User Asked by Steve Newcomb on February 19, 2021

I’m getting off-air MPEG2 transmission streams from HDHomerun hardware and recoding it with ffmpeg. The HDHomerun hardware can give me very brief strings that describe the programs:

% hdhomerun_config hdhr0 get /tuner0/streaminfo
3: 8.1 WROC-HD
4: 8.2 BOUNCE
5: 8.3 Laff
6: 8.4 Escape
tsid=0x0885

But I haven’t been able to persuade ffmpeg to reveal the strings "WROC-HD", "BOUNCE", "Laff", "Escape". I’m supposing that those strings must be somewhere in the multiplexed transmission stream, and therefore ffmpeg must be seeing them, but at the moment, the only way I can get those strings is to make the special invocation of hdhomerun_config shown above. How I can extract this information from ffmpeg (or ffprobe)?

Here is a sample run, using -show_programs, which apparently makes no difference, regardless of whether it is specified before or after the input argument. (N.B. the fact that output always ends with "error writing output" is another mystery that may or may not be related.)

% hdhomerun_config hdhr0 save /tuner0 - | ffprobe -show_programs -
ffprobe version N-101025-g2c60eb6c5a Copyright (c) 2007-2021 the FFmpeg developers
  built with gcc 10 (Debian 10.2.1-6)
  configuration: --enable-nonfree --enable-cuda-nvcc --enable-libnpp --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64
  libavutil      56. 64.100 / 56. 64.100
  libavcodec     58.122.100 / 58.122.100
  libavformat    58. 67.100 / 58. 67.100
  libavdevice    58. 11.103 / 58. 11.103
  libavfilter     7.103.100 /  7.103.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
[mpeg2video @ 0x5634c3f51800] Invalid frame dimensions 0x0.
    Last message repeated 2 times
[mpeg2video @ 0x5634c3f548c0] Invalid frame dimensions 0x0.
[mpeg2video @ 0x5634c3f51800] Invalid frame dimensions 0x0.
    Last message repeated 1 times

{{many lines like the above omitted here}}

Input #0, mpegts, from 'pipe:':
  Duration: N/A, start: 88387.194500, bitrate: N/A
  Program 3 
  Stream #0:5[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 1920x1080 [SAR 1:1 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Side data:
      cpb: bitrate max/min/avg: 24000000/0/0 buffer size: 7995392 vbv_delay: N/A
  Stream #0:7[0x34](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 384 kb/s
  Stream #0:8[0x35](spa): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s (visual impaired) (descriptions)
  Program 4 
  Stream #0:0[0x41]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Side data:
      cpb: bitrate max/min/avg: 15000000/0/0 buffer size: 1835008 vbv_delay: N/A
  Stream #0:1[0x44](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
  Program 5 
  Stream #0:3[0x51]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 40:33 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Side data:
      cpb: bitrate max/min/avg: 15000000/0/0 buffer size: 1835008 vbv_delay: N/A
  Stream #0:2[0x54](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
  Program 6 
  Stream #0:4[0x61]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 40:33 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Side data:
      cpb: bitrate max/min/avg: 15000000/0/0 buffer size: 1835008 vbv_delay: N/A
  Stream #0:6[0x64](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
[PROGRAM]
program_id=3
program_num=3
nb_streams=3
pmt_pid=48
pcr_pid=49
start_pts=88387194500
start_time=88387.194500
end_pts=N/A
end_time=N/A
[STREAM]
index=5
codec_name=mpeg2video
codec_long_name=MPEG-2 video
profile=Main
codec_type=video
codec_time_base=1001/30000
codec_tag_string=[2][0][0][0]
codec_tag=0x0002
width=1920
height=1080
coded_width=0
coded_height=0
closed_captions=1
has_b_frames=1
sample_aspect_ratio=1:1
display_aspect_ratio=16:9
pix_fmt=yuv420p
level=4
color_range=tv
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=left
field_order=tt
timecode=N/A
refs=1
id=0x31
r_frame_rate=30000/1001
avg_frame_rate=30000/1001
time_base=1/90000
start_pts=7954878769
start_time=88387.541878
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
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
[SIDE_DATA]
[/SIDE_DATA]
[/STREAM]
[STREAM]
index=7
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[129][0][0][0]
codec_tag=0x0081
sample_fmt=fltp
sample_rate=48000
channels=6
channel_layout=5.1(side)
bits_per_sample=0
dmix_mode=-1
ltrt_cmixlev=-1.000000
ltrt_surmixlev=-1.000000
loro_cmixlev=-1.000000
loro_surmixlev=-1.000000
id=0x34
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/90000
start_pts=7954847505
start_time=88387.194500
duration_ts=N/A
duration=N/A
bit_rate=384000
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
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
TAG:language=eng
[/STREAM]
[STREAM]
index=8
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[129][0][0][0]
codec_tag=0x0081
sample_fmt=fltp
sample_rate=48000
channels=2
channel_layout=stereo
bits_per_sample=0
dmix_mode=-1
ltrt_cmixlev=-1.000000
ltrt_surmixlev=-1.000000
loro_cmixlev=-1.000000
loro_surmixlev=-1.000000
id=0x35
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/90000
start_pts=7954851243
start_time=88387.236033
duration_ts=N/A
duration=N/A
bit_rate=192000
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
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=1
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
TAG:language=spa
[/STREAM]
[/PROGRAM]
[PROGRAM]
program_id=4
program_num=4
nb_streams=2
pmt_pid=64
pcr_pid=65
start_pts=89577427889
start_time=89577.427889
end_pts=N/A
end_time=N/A
[STREAM]
index=0
codec_name=mpeg2video
codec_long_name=MPEG-2 video
profile=Main
codec_type=video
codec_time_base=1001/30000
codec_tag_string=[2][0][0][0]
codec_tag=0x0002
width=704
height=480
coded_width=0
coded_height=0
closed_captions=1
has_b_frames=1
sample_aspect_ratio=10:11
display_aspect_ratio=4:3
pix_fmt=yuv420p
level=8
color_range=tv
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=left
field_order=tt
timecode=N/A
refs=1
id=0x41
r_frame_rate=30000/1001
avg_frame_rate=30000/1001
time_base=1/90000
start_pts=8062012347
start_time=89577.914967
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
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
[SIDE_DATA]
[/SIDE_DATA]
[/STREAM]
[STREAM]
index=1
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[129][0][0][0]
codec_tag=0x0081
sample_fmt=fltp
sample_rate=48000
channels=2
channel_layout=stereo
bits_per_sample=0
dmix_mode=-1
ltrt_cmixlev=-1.000000
ltrt_surmixlev=-1.000000
loro_cmixlev=-1.000000
loro_surmixlev=-1.000000
id=0x44
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/90000
start_pts=8061968510
start_time=89577.427889
duration_ts=N/A
duration=N/A
bit_rate=192000
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
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
TAG:language=eng
[/STREAM]
[/PROGRAM]
[PROGRAM]
program_id=5
program_num=5
nb_streams=2
pmt_pid=80
pcr_pid=81
start_pts=89580086889
start_time=89580.086889
end_pts=N/A
end_time=N/A
[STREAM]
index=3
codec_name=mpeg2video
codec_long_name=MPEG-2 video
profile=Main
codec_type=video
codec_time_base=1001/30000
codec_tag_string=[2][0][0][0]
codec_tag=0x0002
width=704
height=480
coded_width=0
coded_height=0
closed_captions=1
has_b_frames=1
sample_aspect_ratio=40:33
display_aspect_ratio=16:9
pix_fmt=yuv420p
level=8
color_range=tv
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=left
field_order=tt
timecode=N/A
refs=1
id=0x51
r_frame_rate=30000/1001
avg_frame_rate=30000/1001
time_base=1/90000
start_pts=8062239357
start_time=89580.437300
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
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
[SIDE_DATA]
[/SIDE_DATA]
[/STREAM]
[STREAM]
index=2
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[129][0][0][0]
codec_tag=0x0081
sample_fmt=fltp
sample_rate=48000
channels=2
channel_layout=stereo
bits_per_sample=0
dmix_mode=-1
ltrt_cmixlev=-1.000000
ltrt_surmixlev=-1.000000
loro_cmixlev=-1.000000
loro_surmixlev=-1.000000
id=0x54
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/90000
start_pts=8062207820
start_time=89580.086889
duration_ts=N/A
duration=N/A
bit_rate=192000
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
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
TAG:language=eng
[/STREAM]
[/PROGRAM]
[PROGRAM]
program_id=6
program_num=6
nb_streams=2
pmt_pid=96
pcr_pid=97
start_pts=89580833767
start_time=89580.833767
end_pts=N/A
end_time=N/A
[STREAM]
index=4
codec_name=mpeg2video
codec_long_name=MPEG-2 video
profile=Main
codec_type=video
codec_time_base=1001/30000
codec_tag_string=[2][0][0][0]
codec_tag=0x0002
width=704
height=480
coded_width=0
coded_height=0
closed_captions=1
has_b_frames=1
sample_aspect_ratio=40:33
display_aspect_ratio=16:9
pix_fmt=yuv420p
level=8
color_range=tv
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=left
field_order=tt
timecode=N/A
refs=1
id=0x61
r_frame_rate=30000/1001
avg_frame_rate=30000/1001
time_base=1/90000
start_pts=8062296059
start_time=89581.067322
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
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
[SIDE_DATA]
[/SIDE_DATA]
[/STREAM]
[STREAM]
index=6
codec_name=ac3
codec_long_name=ATSC A/52A (AC-3)
profile=unknown
codec_type=audio
codec_time_base=1/48000
codec_tag_string=[129][0][0][0]
codec_tag=0x0081
sample_fmt=fltp
sample_rate=48000
channels=2
channel_layout=stereo
bits_per_sample=0
dmix_mode=-1
ltrt_cmixlev=-1.000000
ltrt_surmixlev=-1.000000
loro_cmixlev=-1.000000
loro_surmixlev=-1.000000
id=0x64
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/90000
start_pts=8062275039
start_time=89580.833767
duration_ts=N/A
duration=N/A
bit_rate=192000
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
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
TAG:language=eng
[/STREAM]
[/PROGRAM]
error writing output
ffmpegvideovideo conversionvideo streaming

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