Opened 12 years ago
Last modified 7 years ago
#3406 open defect
H.264 threaded decode error
| Reported by: | Cigaes | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avcodec |
| Version: | git-master | Keywords: | h264 |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
There are some samples that decode correctly with threads turned off or only a few threads, but fail to decode with mode threads.
For example:
$ ./ffmpeg_g -threads 4 -i /tmp/sf.h264 -f framecrc -c png -
ffmpeg version N-60805-gc8f3c3a Copyright (c) 2000-2014 the FFmpeg developers
built on Feb 21 2014 20:26:22 with gcc 4.8 (Debian 4.8.2-15)
configuration: --enable-shared --disable-static --enable-gpl --enable-libx264 --enable-libopus --enable-libass --enable-libfreetype --enable-opengl --assert-level=2
libavutil 52. 65.100 / 52. 65.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 1.103 / 4. 1.103
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, h264, from '/tmp/sf.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
#software: Lavf55.33.100
#tb 0: 1/25
Output #0, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.33.100
Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> png)
Press [q] to stop, [?] for help
0, 0, 0, 1, 14600, 0x4d4b3314
0, 1, 1, 1, 20624, 0x9d04c3da
0, 2, 2, 1, 20373, 0x3224514e
0, 3, 3, 1, 16474, 0x5a53824a
0, 4, 4, 1, 20997, 0xe2ac63ec
0, 5, 5, 1, 21466, 0x3a5edae1
0, 6, 6, 1, 15290, 0x9fb36a83
0, 7, 7, 1, 19601, 0x8af6664a
0, 8, 8, 1, 20217, 0x96032e30
0, 9, 9, 1, 16655, 0x6e0a0985
0, 10, 10, 1, 18492, 0x12b572b4
0, 11, 11, 1, 18118, 0x6b1994d6
frame= 12 fps=0.0 q=0.0 Lsize= 1kB time=00:00:00.48 bitrate= 12.2kbits/s
video:218kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -99.671165%
$ ./ffmpeg_g -threads 5 -i /tmp/sf.h264 -f framecrc -c png -
ffmpeg version N-60805-gc8f3c3a Copyright (c) 2000-2014 the FFmpeg developers
built on Feb 21 2014 20:26:22 with gcc 4.8 (Debian 4.8.2-15)
configuration: --enable-shared --disable-static --enable-gpl --enable-libx264 --enable-libopus --enable-libass --enable-libfreetype --enable-opengl --assert-level=2
libavutil 52. 65.100 / 52. 65.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 1.103 / 4. 1.103
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, h264, from '/tmp/sf.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
#software: Lavf55.33.100
#tb 0: 1/25
Output #0, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.33.100
Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> png)
Press [q] to stop, [?] for help
Error while decoding stream #0:0: Invalid data found when processing input
[h264 @ 0xa81240] reference picture missing during reorder
Last message repeated 1 times
[h264 @ 0xa81240] Missing reference picture, default is 65548
Last message repeated 1 times
[h264 @ 0xad9200] reference picture missing during reorder
[h264 @ 0xad9200] Missing reference picture, default is 65556
0, 0, 0, 1, 14600, 0x4d4b3314
0, 1, 1, 1, 20624, 0x9d04c3da
0, 3, 3, 1, 20373, 0x3224514e
0, 4, 4, 1, 16474, 0x5a53824a
0, 5, 5, 1, 21099, 0x61cb8a88
0, 6, 6, 1, 21466, 0x7d3727ad
0, 8, 8, 1, 15370, 0x4b0bcbbd
0, 9, 9, 1, 19775, 0xed275f1c
0, 10, 10, 1, 16851, 0x0725c06b
0, 11, 11, 1, 16717, 0xd445fc7c
frame= 10 fps=0.0 q=0.0 Lsize= 1kB time=00:00:00.48 bitrate= 10.3kbits/s
video:179kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -99.663483%
The -c png is necessary to reproduce the problem in this particular case, but threading issues are sensitive to timing. Helgrind spews a load of errors too:
==10123== Helgrind, a thread error detector
==10123== Copyright (C) 2007-2012, and GNU GPL'd, by OpenWorks LLP et al.
==10123== Using Valgrind-3.8.1 and LibVEX; rerun with -h for copyright info
==10123== Command: ./ffmpeg_g -threads 5 -i /tmp/sf.h264 -f framecrc -c png -
==10123==
ffmpeg version N-60805-gc8f3c3a Copyright (c) 2000-2014 the FFmpeg developers
built on Feb 21 2014 20:26:22 with gcc 4.8 (Debian 4.8.2-15)
configuration: --enable-shared --disable-static --enable-gpl --enable-libx264 --enable-libopus --enable-libass --enable-libfreetype --enable-opengl --assert-level=2
libavutil 52. 65.100 / 52. 65.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 1.103 / 4. 1.103
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, h264, from '/tmp/sf.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
#software: Lavf55.33.100
#tb 0: 1/25
Output #0, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.33.100
Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> png)
Press [q] to stop, [?] for help
==10123== ---Thread-Announcement------------------------------------------
==10123==
==10123== Thread #11 was created
==10123== at 0x7BC40BE: clone (clone.S:76)
==10123== by 0x78C5FF4: do_clone.constprop.4 (createthread.c:74)
==10123== by 0x78C7473: pthread_create@@GLIBC_2.2.5 (createthread.c:244)
==10123== by 0x4C2D8F0: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x58A417F: ff_frame_thread_encoder_init (frame_thread_encoder.c:204)
==10123== by 0x5B7B5D1: avcodec_open2 (utils.c:1305)
==10123== by 0x4210EA: transcode_init (ffmpeg.c:2658)
==10123== by 0x406F8E: main (ffmpeg.c:3413)
==10123==
==10123== ---Thread-Announcement------------------------------------------
==10123==
==10123== Thread #1 is the program's root thread
==10123==
==10123== ----------------------------------------------------------------
==10123==
==10123== Lock at 0x103824B0 was first observed
==10123== at 0x4C2E96A: pthread_mutex_init (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x58A4082: ff_frame_thread_encoder_init (frame_thread_encoder.c:176)
==10123== by 0x5B7B5D1: avcodec_open2 (utils.c:1305)
==10123== by 0x4210EA: transcode_init (ffmpeg.c:2658)
==10123== by 0x406F8E: main (ffmpeg.c:3413)
==10123==
==10123== Possible data race during write of size 8 at 0x103814B8 by thread #11
==10123== Locks held: 1, at address 0x103824B0
==10123== at 0x58A3E54: worker (frame_thread_encoder.c:105)
==10123== by 0x4C2DA86: ??? (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x78C6E0D: start_thread (pthread_create.c:311)
==10123== by 0x7BC40FC: clone (clone.S:113)
==10123==
==10123== This conflicts with a previous read of size 8 by thread #1
==10123== Locks held: none
==10123== at 0x58A4487: ff_thread_video_encode_frame (frame_thread_encoder.c:275)
==10123== by 0x41DCCB: reap_filters (ffmpeg.c:997)
==10123== by 0x407BFD: main (ffmpeg.c:3399)
==10123==
==10123== Address 0x103814B8 is 152 bytes inside a block of size 4856 alloc'd
==10123== at 0x4C2BA30: memalign (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x4C2BB57: posix_memalign (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x6E4A7AC: av_malloc (mem.c:94)
==10123== by 0x6E4A96D: av_mallocz (mem.c:244)
==10123== by 0x58A403F: ff_frame_thread_encoder_init (frame_thread_encoder.c:165)
==10123== by 0x5B7B5D1: avcodec_open2 (utils.c:1305)
==10123== by 0x4210EA: transcode_init (ffmpeg.c:2658)
==10123== by 0x406F8E: main (ffmpeg.c:3413)
==10123==
0, 0, 0, 1, 14600, 0x4d4b3314
0, 1, 1, 1, 20624, 0x9d04c3da4 bitrate= 19.0kbits/s
0, 2, 2, 1, 20373, 0x3224514e8 bitrate= 15.3kbits/s
0, 3, 3, 1, 16474, 0x5a53824a2 bitrate= 14.1kbits/s
0, 4, 4, 1, 20997, 0xe2ac63ec6 bitrate= 13.4kbits/s
0, 5, 5, 1, 21466, 0x3a5edae10 bitrate= 13.1kbits/s
0, 6, 6, 1, 15290, 0x9fb36a832:-22.-77 bitrate=N/A
0, 7, 7, 1, 19601, 0x8af6664a
0, 8, 8, 1, 20217, 0x96032e30
0, 9, 9, 1, 16655, 0x6e0a0985
0, 10, 10, 1, 18492, 0x12b572b4
0, 11, 11, 1, 18118, 0x6b1994d6
frame= 12 fps=0.7 q=0.0 Lsize= 1kB time=00:00:00.48 bitrate= 12.2kbits/s
video:218kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -99.671165%
==10123== ----------------------------------------------------------------
==10123==
==10123== Lock at 0x1038AD20 was first observed
==10123== at 0x4C2E96A: pthread_mutex_init (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x5B75323: default_lockmgr_cb (utils.c:81)
==10123== by 0x5B7AD9D: ff_lock_avcodec (utils.c:3299)
==10123== by 0x5B7B07C: avcodec_open2 (utils.c:1193)
==10123== by 0x54647A3: avformat_find_stream_info (utils.c:2993)
==10123== by 0x412DE0: open_input_file (ffmpeg_opt.c:860)
==10123== by 0x4177C0: ffmpeg_parse_options (ffmpeg_opt.c:2597)
==10123== by 0x406F20: main (ffmpeg.c:3600)
==10123==
==10123== Possible data race during write of size 4 at 0x10385924 by thread #1
==10123== Locks held: 1, at address 0x1038AD20
==10123== at 0x5AD50FD: ff_frame_thread_free (pthread_frame.c:565)
==10123== by 0x5754DBA: avcodec_close (utils.c:2602)
==10123== by 0x407618: main (ffmpeg.c:3491)
==10123==
==10123== Address 0x10385924 is 68 bytes inside a block of size 72 alloc'd
==10123== at 0x4C2BA30: memalign (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x4C2BB57: posix_memalign (in /usr/lib/valgrind/vgpreload_helgrind-amd64-linux.so)
==10123== by 0x6E4A7AC: av_malloc (mem.c:94)
==10123== by 0x6E4A96D: av_mallocz (mem.c:244)
==10123== by 0x5AD53E5: ff_frame_thread_init (pthread_frame.c:641)
==10123== by 0x5B7B5FF: avcodec_open2 (utils.c:1313)
==10123== by 0x4214D7: transcode_init (ffmpeg.c:2144)
==10123== by 0x406F8E: main (ffmpeg.c:3413)
==10123==
==10123==
==10123== For counts of detected and suppressed errors, rerun with: -v
==10123== Use --history-level=approx or =none to gain increased speed, at
==10123== the cost of reduced accuracy of conflicting-access information
==10123== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 2274 from 350)
Attachments (1)
Change History (8)
by , 12 years ago
comment:1 by , 12 years ago
comment:2 by , 12 years ago
I just checked: with just ./configure I do not get the issue, but it happens with --enable-shared. Thanks for testing.
comment:3 by , 12 years ago
I tested with ./configure --enable-shared && make but I am still unable to reproduce a different number of output frames between -threads 4 and -threads 5.
Does it make a difference if you run either decoding or encoding with a different number of threads (1)?
comment:4 by , 12 years ago
It does indeed make a difference:
./ffmpeg_g -threads 5 -i /tmp/sf.h264 -f framecrc -threads 7 -c png - ./ffmpeg_g -threads 5 -i /tmp/sf.h264 -f framecrc -threads 8 -c png -
give respectively:
ffmpeg version N-60813-g44b22bb Copyright (c) 2000-2014 the FFmpeg developers
built on Feb 22 2014 09:46:05 with gcc 4.8 (Debian 4.8.2-15)
configuration: --enable-shared --disable-static --enable-gpl --enable-libx264 --enable-libopus --enable-libass --enable-libfreetype --enable-opengl --assert-level=2
libavutil 52. 65.100 / 52. 65.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 1.103 / 4. 1.103
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, h264, from '/tmp/sf.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
#software: Lavf55.33.100
#tb 0: 1/25
Output #0, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.33.100
Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> png)
Press [q] to stop, [?] for help
0, 0, 0, 1, 14600, 0x4d4b3314
0, 1, 1, 1, 20624, 0x9d04c3da
0, 2, 2, 1, 20373, 0x3224514e
0, 3, 3, 1, 16474, 0x5a53824a
0, 4, 4, 1, 20997, 0xe2ac63ec
0, 5, 5, 1, 21466, 0x3a5edae1
0, 6, 6, 1, 15290, 0x9fb36a83
0, 7, 7, 1, 19601, 0x8af6664a
0, 8, 8, 1, 20217, 0x96032e30
0, 9, 9, 1, 16655, 0x6e0a0985
0, 10, 10, 1, 18492, 0x12b572b4
0, 11, 11, 1, 18118, 0x6b1994d6
frame= 12 fps=0.0 q=0.0 Lsize= 1kB time=00:00:00.48 bitrate= 12.2kbits/s
video:218kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -99.671165%
ffmpeg version N-60813-g44b22bb Copyright (c) 2000-2014 the FFmpeg developers
built on Feb 22 2014 09:46:05 with gcc 4.8 (Debian 4.8.2-15)
configuration: --enable-shared --disable-static --enable-gpl --enable-libx264 --enable-libopus --enable-libass --enable-libfreetype --enable-opengl --assert-level=2
libavutil 52. 65.100 / 52. 65.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 1.103 / 4. 1.103
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, h264, from '/tmp/sf.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p, 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
#software: Lavf55.33.100
#tb 0: 1/25
Output #0, framecrc, to 'pipe:':
Metadata:
encoder : Lavf55.33.100
Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> png)
Press [q] to stop, [?] for help
Error while decoding stream #0:0: Invalid data found when processing input
[h264 @ 0x2310680] reference picture missing during reorder
Last message repeated 1 times
[h264 @ 0x2310680] Missing reference picture, default is 65548
Last message repeated 1 times
[h264 @ 0x23554c0] reference picture missing during reorder
[h264 @ 0x23554c0] Missing reference picture, default is 65556
0, 0, 0, 1, 14600, 0x4d4b3314
0, 1, 1, 1, 20624, 0x9d04c3da
0, 3, 3, 1, 20373, 0x3224514e
0, 4, 4, 1, 16474, 0x5a53824a
0, 5, 5, 1, 21099, 0x61cb8a88
0, 6, 6, 1, 21466, 0x7d3727ad
0, 8, 8, 1, 15370, 0x4b0bcbbd
0, 9, 9, 1, 19775, 0xed275f1c
0, 10, 10, 1, 16851, 0x0725c06b
0, 11, 11, 1, 16717, 0xd445fc7c
frame= 10 fps=0.0 q=0.0 Lsize= 1kB time=00:00:00.48 bitrate= 10.3kbits/s
video:179kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead -99.663483%
comment:7 by , 7 years ago
| Reproduced by developer: | set |
|---|---|
| Status: | new → open |
Happens only rarely, helgrind still shows issues.
$ ffmpeg -i ../sf.h264 -f crc -vcodec png -
ffmpeg version N-92703-gc6e1966 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20180813 (Advance-Toolchain-at12.0) [revision 263510]
configuration: --cpu=power7 --enable-gpl cc=/opt/at12.0/bin/gcc
libavutil 56. 24.101 / 56. 24.101
libavcodec 58. 42.101 / 58. 42.101
libavformat 58. 24.101 / 58. 24.101
libavdevice 58. 6.101 / 58. 6.101
libavfilter 7. 46.101 / 7. 46.101
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
[h264 @ 0x10016471880] top block unavailable for requested intra mode -1
[h264 @ 0x10016471880] error while decoding MB 19 0, bytestream 2784
[h264 @ 0x10016471880] concealing 300 DC, 300 AC, 300 MV errors in I frame
Input #0, h264, from '../sf.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p(progressive), 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> png (native))
Press [q] to stop, [?] for help
[h264 @ 0x100164d26e0] top block unavailable for requested intra mode -1
[h264 @ 0x100164d26e0] error while decoding MB 19 0, bytestream 2784
[h264 @ 0x100164d26e0] concealing 300 DC, 300 AC, 300 MV errors in I frame
[h264 @ 0x10016474210] error while decoding MB 2 14, bytestream -7
[h264 @ 0x10016474210] concealing 67 DC, 67 AC, 67 MV errors in P frame
[h264 @ 0x100164cbf10] error while decoding MB 18 13, bytestream -12
[h264 @ 0x100164cbf10] concealing 71 DC, 71 AC, 71 MV errors in B frame
[h264 @ 0x10016516a90] cabac decode of qscale diff failed at 14 13
[h264 @ 0x10016516a90] error while decoding MB 14 13, bytestream 167
[h264 @ 0x10016516a90] concealing 75 DC, 75 AC, 75 MV errors in B frame
Output #0, crc, to 'pipe:':
Metadata:
encoder : Lavf58.24.101
Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc58.42.101 png
CRC=0xbbe0fd50
frame= 12 fps=0.0 q=-0.0 Lsize= 0kB time=00:00:00.48 bitrate= 0.2kbits/s speed=9.99x
video:103kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
$ ffmpeg -i ../sf.h264 -f crc -vcodec png -
ffmpeg version N-92703-gc6e1966 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.1 (GCC) 20180813 (Advance-Toolchain-at12.0) [revision 263510]
configuration: --cpu=power7 --enable-gpl cc=/opt/at12.0/bin/gcc
libavutil 56. 24.101 / 56. 24.101
libavcodec 58. 42.101 / 58. 42.101
libavformat 58. 24.101 / 58. 24.101
libavdevice 58. 6.101 / 58. 6.101
libavfilter 7. 46.101 / 7. 46.101
libswscale 5. 4.100 / 5. 4.100
libswresample 3. 4.100 / 3. 4.100
libpostproc 55. 4.100 / 55. 4.100
[h264 @ 0x1002fbb1880] top block unavailable for requested intra mode -1
[h264 @ 0x1002fbb1880] error while decoding MB 19 0, bytestream 2784
[h264 @ 0x1002fbb1880] concealing 300 DC, 300 AC, 300 MV errors in I frame
Input #0, h264, from '../sf.h264':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv444p(progressive), 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1200k tbn, 50 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> png (native))
Press [q] to stop, [?] for help
[h264 @ 0x1002fc126e0] top block unavailable for requested intra mode -1
[h264 @ 0x1002fc126e0] error while decoding MB 19 0, bytestream 2784
[h264 @ 0x1002fc126e0] concealing 300 DC, 300 AC, 300 MV errors in I frame
[h264 @ 0x1002fbb4210] error while decoding MB 2 14, bytestream -7
[h264 @ 0x1002fbb4210] concealing 67 DC, 67 AC, 67 MV errors in P frame
[h264 @ 0x1002fc0bf10] error while decoding MB 18 13, bytestream -12
[h264 @ 0x1002fc0bf10] concealing 71 DC, 71 AC, 71 MV errors in B frame
[h264 @ 0x1002fc56a90] cabac decode of qscale diff failed at 14 13
[h264 @ 0x1002fc56a90] error while decoding MB 14 13, bytestream 167
[h264 @ 0x1002fc56a90] concealing 75 DC, 75 AC, 75 MV errors in B frame
Output #0, crc, to 'pipe:':
Metadata:
encoder : Lavf58.24.101
Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc
Metadata:
encoder : Lavc58.42.101 png
CRC=0x54a738a1
frame= 12 fps=0.0 q=-0.0 Lsize= 0kB time=00:00:00.48 bitrate= 0.2kbits/s speed=10.6x
video:104kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
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I can only reproduce the helgrind output, not the different framecrc output for different thread counts. Is the problem reproducible for you with
./configure && make?