Error getting frames

[mnicolas94]

Hi,
I have an issue with a video that plays fine, but when i try to get some frames it rises the following error:
decord._ffi.base.DECORDError: [10:27:30] C:\projects\decord-distro\decord\src\video\video_reader.cc:641: Error getting frame at: 0 with total frames: 199

I'm using decord version 0.4.2 installed from pypi, python 3.6.6 on Windows 10. I can't upload the video for confidenciality reasons, but this is ffprobe diagnose info:

Input #0, avi, from 'C:\file.avi':
  Metadata:
    software        : MEncoder SVN-r33883(20110719-gcc4.5.2)
  Duration: 00:00:20.10, start: 0.000000, bitrate: 3601 kb/s
    Stream #0:0: Video: mpeg4 (Advanced Simple Profile) (XVID / 0x44495658), yuv420p, 1280x1024 [SAR 1:1 DAR 5:4], 3652 kb/s, SAR 65536:65535 DAR 16384:13107, 10 fps, 10 tbr, 10 tbn, 10 tbc

I'm using VideoReader.get_batch() function when i get this error. Also, when i use VideoReader.next() function it returns None. And when i use VideoReader.seek(0) function i get: RuntimeError: Failed to seek to frame 0 and the same for VideoReader.seek_accurate(). When i open the video file with VideReader.open() function, i get a warning message: [11:52:27] C:\projects\decord-distro\decord\src\video\video_reader.cc:277: Failed to seek file to position: 0

I think is a similar problem to #83 issue, but i'm not getting the same error messages. How could i solve this?

Thanks in advance.

EDIT:
It seems to be the same problem as #100, however i dont understand how to solve it.

[ChristianEschen]

I got a similar error:

vr = VideoReader(path, ctx=cpu(0))
for i in range(len(vr)):
frame = vr[i]
[15:11:50] /io/decord/src/video/video_reader.cc:280: Failed to seek file to position: 0

I am on linux...

[YuqiHUO]

hi,
have u tried to update the version to solve the bug? It worked for me in #100

[YuqiHUO]

seems the author change the modification back...
b5b7ae5#diff-ddafbe9a39091de800c878a0bcff64fc77f265fe90f96a11ef1bf00fc88804c3

[mnicolas94]

hi,
have u tried to update the version to solve the bug? It worked for me in #100

Hi, thanks for the answer. I upgraded to 0.5.2 and still getting the same errors.

[starsholic]

I got the same error on decord=0.5.2 on centos, I installed decord via pip

RuntimeError: Failed to seek_accurate to frame 0

Does the author fixed it? @zhreshold

[starsholic]

I got the same error on decord=0.5.2 on centos, I installed decord via pip

RuntimeError: Failed to seek_accurate to frame 0

Does the author fixed it? @zhreshold

[snehamaheshwari07]

Any update on how to resolve this??

[KastanDay]

My issue was resolved by setting num_threads=1 in the VideoReader. This is unfortunate, but greatly increased the reliability.

[relh]

I also found that setting num_threads=1 also fixed my problem. My problem was related, where I was occasionally extracting all black frames for some reason.

I also found that this problem occurred when I was using GPU context, not sure if switching to CPU helped but I did that anyways.