[FFmpeg-user] ffprobe for text files?

Chad Davis

2018-11-20 16:05:42 UTC

Hello-

Here's a newbie ffprobe question:

I noticed that ffprobe supports txt files. For kicks, I created a sample text file titled "test.txt" that contained "Test." I ran ffprobe (ffprobe -v error -show_format -show_streams test.txt) and got this:

[STREAM]
index=0
codec_name=ansi
codec_long_name=ASCII/ANSI art
profile=unknown
codec_type=video
codec_time_base=1/25
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=640
height=400
coded_width=640
coded_height=400
has_b_frames=0
sample_aspect_ratio=0:1
display_aspect_ratio=0:1
pix_fmt=pal8
level=-99
color_range=N/A
color_space=unknown
color_transfer=unknown
color_primaries=unknown
chroma_location=unspecified
field_order=unknown
timecode=N/A
refs=1
id=N/A
r_frame_rate=25/1
avg_frame_rate=25/1
time_base=1/25
start_pts=N/A
start_time=N/A
duration_ts=1
duration=0.040000
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
[/STREAM]
[FORMAT]
filename=test.txt
nb_streams=1
nb_programs=0
format_name=tty
format_long_name=Tele-typewriter
start_time=N/A
duration=0.040000
size=5
bit_rate=1000
probe_score=50
[/FORMAT]

I guess I don't understand why ffprobe would support text files. I also don't understand why a text file could have a width, height or duration. Am I missing something?

Thanks!

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