Opened 8 months ago
Closed 7 months ago
#10886 closed defect (fixed)
Transcoding video to x264/x265 results in 1 second of frozen frames
| Reported by: | Yuri Gorokhov | Owned by: | |
|---|---|---|---|
| Priority: | important | Component: | avfilter |
| Version: | git-master | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | 7.0 | Reproduced by developer: | yes |
| Analyzed by developer: | no |
Description (last modified by )
Summary of the bug:
Transcoding to x264 on git-master introduces frozen frames.
Exact same steps on 6.0.1 produces correct video (no frozen frames)
Repro-steps:
Download input video: https://github.com/yurigorokhov/ffmpeg_bug/raw/main/input-1fps.mov
The input video is at 1fps (that is expected)
Run ffmpeg encoding command:
ffmpeg -y -ignore_editlist true \ -i input-1fps.mov -r 30 \ -vcodec libx264 \ -x264opts keyint=30:scenecut=0 \ -crf 34 \ -vf "setpts=(N/(30*TB)),format=pix_fmts=yuv420p" \ output.mov
with x265:
ffmpeg -y -ignore_editlist true \ -i input-1fps.mov -r 30 \ -c:v libx265 -crf 28 -b:v 2.8M -tag:v hvc1 \ -vf "setpts=(N/(30*TB)),format=pix_fmts=yuv420p" \ output.mov
Please note the frozen frames in the output video.
Further details, repro step and sample videos are located here: https://github.com/yurigorokhov/ffmpeg_bug
ffmpeg version 6.1.1
built on alpine linux
Change History (12)
comment:1 by , 8 months ago
| Blocking: | → 7.0 |
|---|---|
| Component: | undetermined → ffmpeg |
| Status: | new → open |
| Version: | 6.1 → git-master |
comment:2 by , 8 months ago
| Description: | modified (diff) |
|---|
comment:4 by , 8 months ago
| Description: | modified (diff) |
|---|
comment:5 by , 8 months ago
| Description: | modified (diff) |
|---|
comment:6 by , 8 months ago
| Description: | modified (diff) |
|---|---|
| Summary: | Transcoding video to x264 results in 1 second of frozen frames → Transcoding video to x264/x265 results in 1 second of frozen frames |
comment:7 by , 8 months ago
| Description: | modified (diff) |
|---|
comment:8 by , 8 months ago
| Description: | modified (diff) |
|---|
comment:10 by , 8 months ago
| Reproduced by developer: | set |
|---|
comment:12 by , 7 months ago
| Component: | ffmpeg → avfilter |
|---|---|
| Resolution: | → fixed |
| Status: | open → closed |
Note:
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When filing a bug report, include the description of the problem, the steps and the complete command lines in the body of the ticket. Samples should ideally be attached to the ticket, but if they're too large, add direct links.
That said, I'm able to reproduce this with current git master, which is the only acceptable version for bug reports. You can ignore the original source, and simply use waves-6-1-1-tmp.mov as the source with both 6.0 and current git in order to demonstrate the regression.
I suggest you edit the ticket with these changes.