Hi Carl -- any luck digging into that video?
Thanks!
On Wed, Jun 27, 2012 at 9:03 AM, Noah Spitzer-Williams
n...@highlighthunter.com wrote:
Input file: https://dl.dropbox.com/u/28441949/sample%20video.MP4
On Tue, Jun 26, 2012 at 10:45 PM, Carl Eugen Hoyos ceho...@ag.or.atwrote:
Simon
Input file: https://dl.dropbox.com/u/28441949/sample%20video.MP4
On Tue, Jun 26, 2012 at 10:45 PM, Carl Eugen Hoyos ceho...@ag.or.at wrote:
Simon Daniels simondaniels23@... writes:
I've confirmed this does seem to be a regression.
I ran the same code with the same video on ffmpeg 0.8.3
Thanks Pavel but it doesn't look like I can use the -skip_frame flag to
specify a particular number of frames to skip.
From:
http://ffmpeg.org/doxygen/trunk/group__lavc__decoding.html#g352363bce7d3ed82c101b3bc001d1c16
*AVDISCARD_NONE* discard nothing*AVDISCARD_DEFAULT* discard useless packets
On Tue, Jun 26, 2012 at 1:11 PM, Simon Daniels simondaniel...@gmail.com wrote:
Hi Michael -- after reading into things a bit more, I agree that it's risky
what I'm doing. However, I only need about 3 frames per second so maybe
waiting for a key frame isn't the end of the world...
Is there a
Input file: https://dl.dropbox.com/u/28441949/sample%20video.MP4
On Tue, Jun 26, 2012 at 10:45 PM, Carl Eugen Hoyos ceho...@ag.or.at wrote:
Simon Daniels simondaniels23@... writes:
I've confirmed this does seem to be a regression.
I ran the same code with the same video on ffmpeg 0.8.3
Hey guys,
I'm doing some simply video analysis in which I walk through frames of a
video and do some calculations on the pixel data. I started noticing some
issues with frame timing so I tried to compare my results with a simple
thumbnail extraction script using ffmpeg.exe.
*The thumbnails from
Simon Daniels simondaniels23@... writes:
The thumbnails from my code did not visually line up with
the thumbnails generated by ffmpeg.exe.
Command line and complete, uncut console output missing.
If you are a user and not a distributor, please always use
current git head.
Carl Eugen
On Tue, Jun 26, 2012 at 12:34 PM, Simon Daniels
simondaniel...@gmail.com wrote:
// Is this a packet from the video stream?
if (packet.stream_index == videoStreamIndex frameLocation++ % frameSkip
== 0)
{
// Decode video frame
avcodec_decode_video2(pCodecCtx, pFrameYUV, isFrameFinished,
Sorry Carl -- here you go:
C:\Users\Simonffmpeg.exe -i sample video.mp4 -vframes 1 -f image2 -sameq
-vcodec mjpeg frame-%05d.jpg
ffmpeg version 0.11.1 Copyright (c) 2000-2012 the FFmpeg developers
built on Jun 12 2012 21:10:06 with gcc 4.6.3
configuration: --enable-version3
Hi Michael -- after reading into things a bit more, I agree that it's risky
what I'm doing. However, I only need about 3 frames per second so maybe
waiting for a key frame isn't the end of the world...
Is there a safer way? The decoding is extremely expensive so I only want to
do it when I
Interesting. There was a difference of 30 between the frames that
ffmpeg.exe output and the result of -nb_frames.
Sure enough, ffmpeg.exe with -vsync 0 output 480 frames instead of 510. So
now how do I get my code's output to match ffmpeg.exe's output? (and
hopefully skip frames in the process)
I've confirmed this does seem to be a regression.
https://dl.dropbox.com/u/28441949/0.8.3.results.zip
https://dl.dropbox.com/u/28441949/0.11.1.results.zip
I ran the same code with the same video on ffmpeg 0.8.3 and 0.11.1 and you
can see the thumbnails generated are not the same. #281 in 0.11.1
Simon Daniels simondaniels23@... writes:
I've confirmed this does seem to be a regression.
I ran the same code with the same video on ffmpeg 0.8.3
and 0.11.1 and you can see the thumbnails generated are
not the same. #281 in 0.11.1 lines up with #221 in 0.8.3.
Please provide the input
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