[FFmpeg-user] ffprobe -show_frames values

[Joel Lopez]

Thanks for the help.  It's making a bit of sense now.  It looks like my
keyframes are 1/3 of a second.  Is less than 2 seconds apart ok?

In the pict_type field I'm seeing B's and P's with one I.  Does that
translate to how far apart they are?

[FRAME]

pkt_pts_time=244.700000

pkt_dts_time=244.700000

pict_type=P

[/FRAME]

[FRAME]

pkt_pts_time=244.733333

pkt_dts_time=244.733333

pict_type=B

[/FRAME]

[FRAME]

pkt_pts_time=244.766667

pkt_dts_time=244.766667

pict_type=P

[/FRAME]

[FRAME]

pkt_pts_time=244.800000

pkt_dts_time=244.800000

pict_type=I

[/FRAME]

[FRAME]

pkt_pts_time=244.833333

pkt_dts_time=244.833333

pict_type=B

[/FRAME]

[FRAME]

pkt_pts_time=244.866667

pkt_dts_time=244.866667

pict_type=P

[/FRAME]


Here's the unfiltered output of a couple frames.


[FRAME]

media_type=video

key_frame=0

pkt_pts=754000

pkt_pts_time=251.333333

pkt_dts=754000

pkt_dts_time=251.333333

best_effort_timestamp=754000

best_effort_timestamp_time=251.333333

pkt_duration=100

pkt_duration_time=0.033333

pkt_pos=69183172

pkt_size=138

width=1280

height=720

pix_fmt=yuv420p

sample_aspect_ratio=N/A

pict_type=P

coded_picture_number=7539

display_picture_number=0

interlaced_frame=0

top_field_first=0

repeat_pict=0

[/FRAME]

[FRAME]

media_type=video

key_frame=0

pkt_pts=754100

pkt_pts_time=251.366667

pkt_dts=754100

pkt_dts_time=251.366667

best_effort_timestamp=754100

best_effort_timestamp_time=251.366667

pkt_duration=100

pkt_duration_time=0.033333

pkt_pos=69183588

pkt_size=140

width=1280

height=720

pix_fmt=yuv420p

sample_aspect_ratio=N/A

pict_type=B

coded_picture_number=7542

display_picture_number=0

interlaced_frame=0

top_field_first=0

repeat_pict=0

[/FRAME]





On Thu, Apr 30, 2015 at 1:24 AM, Werner Robitza <werner.robitza at gmail.com>
wrote:

> On Wed, Apr 29, 2015 at 8:36 PM, Joel Lopez <badassmexican at gmail.com>
> wrote:
> > Hi,
> >
> > I'm trying to decipher what the values are in the info presented.  I need
> > to determine how far apart the keyframes are.  3 seconds is what I hear
> > they should be for adaptive bitrate switching.
>
> Anything between 2 and 10 seconds is reasonable.
>
> > Are these miliseconds and bytes?
>
> PTS_time and DTS_time are in seconds. The size is in Bytes.
>
> But this won't tell you how far the keyframes are apart. For that,
> you'll need to check the "pict_type" field of the -show_frames option.
> Or, when your container is an MPEG-2 Transport Stream, check the
> "flags" field of the -show_packets option.
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