[FFmpeg-trac] #6285(avfilter:new): ffmpeg hangs when using framerate filter since filtering rework
FFmpeg
trac at avcodec.org
Sat Apr 1 03:43:58 EEST 2017
#6285: ffmpeg hangs when using framerate filter since filtering rework
--------------------------------------+------------------------------------
Reporter: cus | Owner:
Type: defect | Status: new
Priority: important | Component: avfilter
Version: git-master | Keywords: regression
Blocked By: | Blocking:
Reproduced by developer: 0 | Analyzed by developer: 0
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Summary of the bug:
Since the recent filtering changes (around
02aa0701ae0dc2def8db640c9e3c06dc1b5de70c) ffmpeg.c hangs because always
EAGAIN is returned in transcode_step when using framerate filter with
certain input timestamps.
How to reproduce:
{{{
% ./ffmpeg -y -i out.mp4 -vf framerate=50 out.avi
ffmpeg version N-84804-g247d033 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.8 (SUSE Linux)
configuration: --disable-vaapi --enable-vdpau --enable-gpl --enable-
libfreetype --enable-libzvbi --enable-libass --enable-frei0r --enable-
openssl --enable-nonfree --enable-libx264 --enable-libfdk-aac --enable-
nonfree --enable-libvorbis --enable-decklink --enable-libmp3lame --enable-
openal --enable-libiec61883
libavutil 55. 52.100 / 55. 52.100
libavcodec 57. 86.103 / 57. 86.103
libavformat 57. 68.100 / 57. 68.100
libavdevice 57. 3.101 / 57. 3.101
libavfilter 6. 78.101 / 6. 78.101
libswscale 4. 3.101 / 4. 3.101
libswresample 2. 4.100 / 2. 4.100
libpostproc 54. 2.100 / 54. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.68.100
Duration: 00:00:02.93, start: 0.100000, bitrate: 22 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
32x32, 17 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> mpeg4 (native))
Press [q] to stop, [?] for help
[Parsed_framerate_0 @ 0x356ea00] time base:1/15360 -> 1/76800 exact:1
[Parsed_framerate_0 @ 0x356ea00] fps -> fps:50/1 scene score:7.000000
interpolate start:15 end:240
[mpeg4 @ 0x349b4e0] too many threads/slices (3), reducing to 2
Output #0, avi, to 'out.avi':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
ISFT : Lavf57.68.100
Stream #0:0(eng): Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 32x32,
q=2-31, 200 kb/s, 50 fps, 50 tbn, 50 tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc57.86.103 mpeg4
Side data:
cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame= 132 fps= 38 q=2.0 Lsize= 34kB time=00:00:02.64 bitrate=
105.6kbits/s speed=0.759x
video:25kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 34.369095%
Exiting normally, received signal 2.
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/6285>
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