Hendrik Leppkes h.leppkes@... writes:
On Thu, Jul 19, 2012 at 8:18 AM, Carl Eugen Hoyos wrote:
Michael Bradshaw mbradshaw at ... writes:
But when I seek, the first packet returned out of the demuxer is
not a keyframe packet, and I have to read several (~45ish) packets
until I encounter a
On Thu, Jul 19, 2012 at 8:31 AM, Carl Eugen Hoyos ceho...@ag.or.at wrote:
Isn't this necessary for some codecs / at least for H264? Wouldn't
the API do exactly the same?
Sure, if you end up seeking to a non-keyframe, it should not decode garbage
frames.
The point here is that we would want
On Thu, Jul 19, 2012 at 9:25 AM, Carl Eugen Hoyos ceho...@ag.or.at wrote:
So if the file is ~2GB and (as a user) I seek approximately to
the middle of the video and decide to seek back then, the
video should be decoded from the beginning to find the keyframe
before the position I want to seek
On 07/19/2012 09:25 AM, Carl Eugen Hoyos wrote:
Hendrik Leppkes h.leppkes@... writes:
On Thu, Jul 19, 2012 at 8:31 AM, Carl Eugen Hoyos wrote:
Isn't this necessary for some codecs / at least for H264?
Wouldn't the API do exactly the same?
Sure, if you end up seeking to a non-keyframe, it
I found (and posted) the solution to this:
http://stackoverflow.com/questions/11537830/ffmpeg-api-h264-encoded-video-does-not-play-on-all-platforms/11558127#11558127
--
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On Thu, Jul 19, 2012 at 12:18 AM, Carl Eugen Hoyos ceho...@ag.or.at wrote:
Michael Bradshaw mbradshaw@... writes:
But when I seek, the first packet returned out of the demuxer is
not a keyframe packet, and I have to read several (~45ish) packets
until I encounter a keyframe.
Could you
Hi Guys
I have a problem creating MPEG2-TS files when using the ffmpeg API. I
get the following error thrown by ffmpeg H.264 bitstream malformed,
no startcode found, use the h264_mp4toannexb bitstream filter (-bsf
h264_mp4toannexb).
On the CLI interface I can easily specify the bitstream filter
Michael Bradshaw mbradshaw@... writes:
But when I seek, the first packet returned out of the demuxer is
not a keyframe packet, and I have to read several (~45ish) packets
until I encounter a keyframe.
Could you provide a sample that does not seek to a keyframe with
ffmpeg -ss x -i
- Original Message -
From: Michael Bradshaw mbrads...@sorensonmedia.com
To: This list is about using libavcodec, libavformat, libavutil,libavdevice
and libavfilter. libav-user@ffmpeg.org
Sent: Thursday, July 19, 2012 1:13 PM
Subject: Re: [Libav-user] Why does av_seek_frame() not seek to
On Thu, Jul 19, 2012 at 12:42 PM, Carl Eugen Hoyos ceho...@ag.or.at wrote:
[...]
Afair, Reimar believes the seek function should not try hard to find
a keyframe because seeking faster is more important.
I think the current functionality is OK, provided it's documented
well. Though to be honest
On Thu, Jul 19, 2012 at 1:54 PM, Hendrik Leppkes h.lepp...@gmail.com wrote:
[...]
If you want to do accurate seeks with only avformat, you have to add a lot
of boilerplate on top of it right now - or if you want to do accurate seeks
even with ffmpeg. Sure, if you tell it to seek, it'll output
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