Opened 7 years ago
Closed 7 years ago
#6627 closed defect (needs_more_info)
av_read_frame got incorrect packet after av_seek_frame
| Reported by: | leiming | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avformat |
| Version: | git-master | Keywords: | mov |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
I'm writing a C program to use avformat to demux the attached mp4 file and feed audio track to decoder. I found avformat read packet in incorrect size after seek to begining, and decoder refused to decode that packet.
How to reproduce:
windows 10 x64, visual studio 2013, linked with nightly build 20170827-ef0c6d9-win32 (32bit) from https://ffmpeg.zeranoe.com/builds/
I use av_read_frame to read packet from video file, and feed the packet of audio track through avcodec_send_packet to decoder, then receive frame by avcodec_receive_frame. After decoding finished, I use av_seek_frame to rewind and read the file again.
The program's output should explain the issue.
attachments are the program and sample video file.
Attachments (3)
Change History (5)
by , 7 years ago
| Attachment: | bug-sample.zip added |
|---|
comment:1 by , 7 years ago
| Keywords: | mov added; mp4 demuxer removed |
|---|
comment:2 by , 7 years ago
| Resolution: | → needs_more_info |
|---|---|
| Status: | new → closed |
In second turn, that the audio packet with the same pts is larger
is caused by the merging of side data.
Decoding error may be caused by other problem.
source code of program and sample video to cause the bug.