Okay, so changing "default=noprint_wrappers=1:nokey=1" to "default=noprint_wrappers=1:nokey=0" returns all entries with their name like this:

(shell-to-string "/usr/bin/ffprobe" "-v" "quiet"
		 "-show_entries" "format=duration"
		 "-show_entries" "format=size"
		 "-show_entries" "stream=sample_rate,channels,r_frame_rate,width,height,bits_per_sample"
		 "-of" "default=noprint_wrappers=1:nokey=0" "/E/SWELST/video/C0002.MP4")
"width=3840
height=2160
r_frame_rate=25/1
sample_rate=48000
channels=2
bits_per_sample=16
r_frame_rate=0/0
r_frame_rate=0/0
r_frame_rate=0/0
duration=9687.840000
size=114935107344
"

As you can see, we get multiple r_frame_rate entries because when we want audio and video stream data, we have to read ALL streams. You can only choose to read from one stream or all... So packing audio and video in one function means we can already no longer go by order...

Since I wouldn't know how else to parse a list like that, I went with the regex route again. I see no change in speed!

I modified get-sound-info (see ebbd7d0) and added the parse-ffprobe-string function. However I haven't updated any other methods yet.

NB: You can get all entries with this command:

(shell-to-string "/usr/bin/ffprobe" "-v" "quiet" "-show_streams" "-of" "default=noprint_wrappers=1:nokey=0" "/E/SWELST/video/C0002.MP4")

That way you can also determine their names...

get fps, dimensions etc. for vidfile from ffprobe #96

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