#10164: Segfault dual pass transcoding to AV1 with libaom
-------------------------------------+-------------------------------------
Reporter: Ferdi | Owner: (none)
Scholten |
Type: defect | Status: new
Priority: normal | Component:
| undetermined
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by Ferdi Scholten):
Just built ffmpeg n5.1.2 this version also segfaults at the end of the
transcode.
Output from first pass:
{{{
ffmpeg -i test.mkv -c:v libaom-av1 -pass 1 -cpu-used 4 -row-mt true
-threads 8 -lag-in-frames 48 -crf 35 -tiles 1x2 -aq-mode 3 -an -f null
/dev/null
ffmpeg version n5.1.2 Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12 (Ubuntu 12.2.0-3ubuntu1)
configuration: --prefix=/home/ferdi/ffmpeg_build --pkg-config-
flags=--static --extra-cflags=-I/home/ferdi/ffmpeg_build/include --extra-
ldflags=-L/home/ferdi/ffmpeg_build/lib --extra-libs='-lpthread -lm'
--ld=g++ --bindir=/home/ferdi/bin --enable-gpl --enable-gnutls --enable-
libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-
libmp3lame --enable-libopus --enable-libsvtav1 --enable-libdav1d --enable-
libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-
nonfree --enable-libvmaf --enable-lto
libavutil 57. 28.100 / 57. 28.100
libavcodec 59. 37.100 / 59. 37.100
libavformat 59. 27.100 / 59. 27.100
libavdevice 59. 7.100 / 59. 7.100
libavfilter 8. 44.100 / 8. 44.100
libswscale 6. 7.100 / 6. 7.100
libswresample 4. 7.100 / 4. 7.100
libpostproc 56. 6.100 / 56. 6.100
Input #0, matroska,webm, from 'test.mkv':
Metadata:
COMPATIBLE_BRANDS: isomiso2avc1mp41
MAJOR_BRAND : isom
MINOR_VERSION : 512
ENCODER : Lavf59.37.100
Duration: 00:01:00.00, start: 0.000000, bitrate: 3810 kb/s
Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR
1:1 DAR 16:9], 30.08 fps, 30.08 tbr, 1k tbn (default)
Metadata:
HANDLER_NAME : VideoHandler
VENDOR_ID : [0][0][0][0]
DURATION : 00:00:59.897000000
Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp (default)
Metadata:
HANDLER_NAME : SoundHandler
VENDOR_ID : [0][0][0][0]
DURATION : 00:01:00.000000000
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> av1 (libaom-av1))
Press [q] to stop, [?] for help
[libaom-av1 @ 0x55f4346c53c0] 3.5.0
Output #0, null, to '/dev/null':
Metadata:
COMPATIBLE_BRANDS: isomiso2avc1mp41
MAJOR_BRAND : isom
MINOR_VERSION : 512
encoder : Lavf59.27.100
Stream #0:0: Video: av1, yuv420p(progressive), 1920x1080 [SAR 1:1 DAR
16:9], q=2-31, 30.08 fps, 30.08 tbn (default)
Metadata:
HANDLER_NAME : VideoHandler
VENDOR_ID : [0][0][0][0]
DURATION : 00:00:59.897000000
encoder : Lavc59.37.100 libaom-av1
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 1800 fps= 44 q=0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A speed=
0x
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown
Output file is empty, nothing was encoded
}}}
Will try to get output from second pass as well. After the segfault, the
terminal does not behave well and no longer has a cursor or visible
output.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/10164#comment:2>
FFmpeg <https://ffmpeg.org>
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