<v4l2src0:pool:src> Dropping truncated buffer, this is likely a driver bug.

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<v4l2src0:pool:src> Dropping truncated buffer, this is likely a driver bug.

Aniket0987
Trying to capture I420 FHD at 5fps on RP4.
Pipeline is as follows,

v4l2src device=/dev/video0 io-mode=dmabuf !
video/x-raw,width=1920,height=1080 ! videoconvert ! video/x-raw,format=RGBA
! videorate ! video/x-raw,framerate=5/1 ! queue leaky=downstream !
v4l2h264enc capture-io-mode=dmabuf ! video/x-h264,profile=main ! h264parse
splitmuxsink name=mp4mux max-size-time=60000000000 max-size-bytes=134217728
location=/tmp/vid_ sync=false ! queue ! mp4mux.video

After a certain time, v4l2src starts dropping everything.

0:10:33.385742774    42   0xa3bfb0 INFO                 v4l2src
gstv4l2src.c:961:gst_v4l2src_create:<v4l2src0> sync to 0:10:30.400000000 out
ts 0:10:30.557956381
0:10:33.585610267    42   0xa3bfb0 DEBUG                v4l2src
gstv4l2src.c:925:gst_v4l2src_create:<v4l2src0> ts: 1:05:16.523210000 now
1:05:16.695278946 delay 0:00:00.172068946
0:10:33.585754746    42   0xa3bfb0 INFO                 v4l2src
gstv4l2src.c:961:gst_v4l2src_create:<v4l2src0> sync to 0:10:30.600000000 out
ts 0:10:30.757941863
0:10:33.689999870    42   0xa3bfb0 WARN          v4l2bufferpool
gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
Dropping truncated buffer, this is likely a driver bug.
0:10:33.690498344    42   0xa3bfb0 WARN          v4l2bufferpool
gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
Dropping truncated buffer, this is likely a driver bug.
0:10:33.693825940    42   0xa3bfb0 WARN          v4l2bufferpool
gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
Dropping truncated buffer, this is likely a driver bug.
0:10:33.694079417    42   0xa3bfb0 WARN          v4l2bufferpool
gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
Dropping truncated buffer, this is likely a driver bug.
0:10:33.697968615    42   0xa3bfb0 WARN          v4l2bufferpool
gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
Dropping truncated buffer, this is likely a driver bug.
0:10:33.698261555    42   0xa3bfb0 WARN          v4l2bufferpool
gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
Dropping truncated buffer, this is likely a driver bug.

Is there any issue in my pipeline or is it a v4l2 driver bug?



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Re: <v4l2src0:pool:src> Dropping truncated buffer, this is likely a driver bug.

Nicolas Dufresne-5
Le mercredi 24 juin 2020 à 22:47 -0500, Aniket0987 a écrit :

> Trying to capture I420 FHD at 5fps on RP4.
> Pipeline is as follows,
>
> v4l2src device=/dev/video0 io-mode=dmabuf !
> video/x-raw,width=1920,height=1080 ! videoconvert ! video/x-raw,format=RGBA
> ! videorate ! video/x-raw,framerate=5/1 ! queue leaky=downstream !
> v4l2h264enc capture-io-mode=dmabuf ! video/x-h264,profile=main ! h264parse
> splitmuxsink name=mp4mux max-size-time=60000000000 max-size-bytes=134217728
> location=/tmp/vid_ sync=false ! queue ! mp4mux.video
>
> After a certain time, v4l2src starts dropping everything.
>
> 0:10:33.385742774    42   0xa3bfb0 INFO                 v4l2src
> gstv4l2src.c:961:gst_v4l2src_create:<v4l2src0> sync to 0:10:30.400000000 out
> ts 0:10:30.557956381
> 0:10:33.585610267    42   0xa3bfb0 DEBUG                v4l2src
> gstv4l2src.c:925:gst_v4l2src_create:<v4l2src0> ts: 1:05:16.523210000 now
> 1:05:16.695278946 delay 0:00:00.172068946
> 0:10:33.585754746    42   0xa3bfb0 INFO                 v4l2src
> gstv4l2src.c:961:gst_v4l2src_create:<v4l2src0> sync to 0:10:30.600000000 out
> ts 0:10:30.757941863
> 0:10:33.689999870    42   0xa3bfb0 WARN          v4l2bufferpool
> gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
> Dropping truncated buffer, this is likely a driver bug.
> 0:10:33.690498344    42   0xa3bfb0 WARN          v4l2bufferpool
> gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
> Dropping truncated buffer, this is likely a driver bug.
> 0:10:33.693825940    42   0xa3bfb0 WARN          v4l2bufferpool
> gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
> Dropping truncated buffer, this is likely a driver bug.
> 0:10:33.694079417    42   0xa3bfb0 WARN          v4l2bufferpool
> gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
> Dropping truncated buffer, this is likely a driver bug.
> 0:10:33.697968615    42   0xa3bfb0 WARN          v4l2bufferpool
> gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
> Dropping truncated buffer, this is likely a driver bug.
> 0:10:33.698261555    42   0xa3bfb0 WARN          v4l2bufferpool
> gstv4l2bufferpool.c:2066:gst_v4l2_buffer_pool_process:<v4l2src0:pool:src>
> Dropping truncated buffer, this is likely a driver bug.
>
> Is there any issue in my pipeline or is it a v4l2 driver bug?

The warning from gst is correct, it's a driver bug. But as you can see,
it has a workaround. The driver I made this workaround for is now fixed
in mainline kernel.

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Re: <v4l2src0:pool:src> Dropping truncated buffer, this is likely a driver bug.

Aniket0987
Okay. So this has been fixed in v4l2-core? or are we talking about gstreamer
1.17.1.



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Re: <v4l2src0:pool:src> Dropping truncated buffer, this is likely a driver bug.

Nicolas Dufresne-5
Le lundi 29 juin 2020 à 01:57 -0500, Aniket0987 a écrit :
> Okay. So this has been fixed in v4l2-core? or are we talking about gstreamer
> 1.17.1.

v4l2-core, but I tried to add a workaround in gstreamer master, but
there is a limit of what we can do about it in userland.

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Re: <v4l2src0:pool:src> Dropping truncated buffer, this is likely a driver bug.

Aniket0987
If this is fixed in v4l2-core I believe it will come out with the next linux
kernel release, correct me if otherwise. Is there any other way to upgrade
v4l2?



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Re: <v4l2src0:pool:src> Dropping truncated buffer, this is likely a driver bug.

Nicolas Dufresne-5


Le sam. 4 juill. 2020 07 h 45, Aniket0987 <[hidden email]> a écrit :
If this is fixed in v4l2-core I believe it will come out with the next linux
kernel release, correct me if otherwise. Is there any other way to upgrade
v4l2?

The next kernel release is very ambiguous, since there is often a certain lag between the official release and distro / embedded board being updated. Also, bug fixes can be backported.





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