#11597: FFmpeg output is stuck if using split with fps filter -------------------------------------+------------------------------------- Reporter: TheTroll | Owner: (none) Type: defect | Status: new Priority: important | Component: avfilter Version: git-master | Resolution: Keywords: split | Blocked By: thumbnail | Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- Description changed by TheTroll: Old description:
Summary of the bug: How to reproduce: {{{ % ffmpeg -re -y -i INPUT -filter_complex "[0:v]split=2[s0][sthumb];[s0]scale=320:184[o0];[sthumb]fps=1/60[othumb]" -an -c:v libx264 -map [o0] out.ts -map [othumb] -update 1 out.png }}}
Built on master
When trying to transcode an input live stream while extracting thumbnails (every minute in this example), using the split and fps filters, FFmpeg gets blocked and eventually generates the output after a while, by bursts.
The following warning indicates that something is wrong:
[out_#0:0 @ 0x7f1018013c00] 100 buffers queued in out_#0:0, something may be wrong.
FFmpeg 5.1.2 works fine and as expected.
Thanks
New description: Summary of the bug: How to reproduce: {{{ % ffmpeg -re -y -i INPUT -filter_complex "[0:v]split=2[o0][sthumb];[sthumb]fps=1/60[othumb]" -an -c:v libx264 -map [o0] out.ts -map [othumb] -update 1 out.png }}} Built on master When trying to transcode an input live stream while extracting thumbnails (every minute in this example), using the split and fps filters, FFmpeg gets blocked and eventually generates the output after a while, by bursts. The following warning indicates that something is wrong: [out_#0:0 @ 0x7f1018013c00] 100 buffers queued in out_#0:0, something may be wrong. FFmpeg 5.1.2 works fine and as expected. Thanks -- -- Ticket URL: <https://trac.ffmpeg.org/ticket/11597#comment:1> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker