#504: Fixing av_seek_frame
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Reporter: DonMoir | Owner:
Type: defect | Status: new
Priority: normal | Component:
Version: unspecified | undetermined
Keywords: | Resolution:
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Comment (by DonMoir):
A lot of the seek errors I am seeing are with MPEG1 files. Not all of them
fail though. I get some failures with MPEG2 as well. I am still looking
into this. Most of the other formats I have tried work pretty good but I
have this CODEC_ID_H264 case that fails. (AspectRatioHB.mpg). This
particular file has 1 keyframe in the first frame and it is marked as
such. The timestamp for this frame is negative which might have something
to do with the failure but I don't know. Any attempt to seek directly to
this first frame will fail. I have tried serveral different ways to seek
to the frame but it always ends up with incorrect results. Other ways
might be avio_seek and update the timestamp etc. Like the seek may return
-1 or if I rearrange things seek returns success but then on decode I
might get a gray frame or similiar. The rest of the H264 files I have work
fine.
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/504#comment:1>
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