[FFmpeg-trac] #4297(undetermined:new): video sync errors and missing stream after clipping h264 files
FFmpeg
trac at avcodec.org
Wed Feb 4 22:01:39 CET 2015
#4297: video sync errors and missing stream after clipping h264 files
-------------------------------------+-------------------------------------
Reporter: seahorse41 | Type: defect
Status: new | Priority: important
Component: | Version: git-
undetermined | master
Keywords: h264 video | Blocked By:
sync clip | Reproduced by developer: 0
Blocking: |
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Summary of the bug:
If I re-encode a file with h264, any later attempts to clip/trim/resize
that file result in various sync errors or even a missing video stream.
How to reproduce:
After starting with a raw camera file, after I process it by resizing
and/or cropping etc, using the h264 codec, When I later try to use that
output file as an input file for further processing, (like to trim
the length and starting time) it gives an error and drops the video
stream, or it gets the video way out of sync.
Looks like the same bug, with different starting times specified.
I suspect a problem with tbc and tbn, watch the input and output values.
Step 1, resize only:
{{{
> ffmpeg -v 9 -loglevel 99 -i 20150204_1037_beaverDam7_rec_5472.MOV -c:v
h264 -s 640x360 -c:a copy 20150204_1037_beaverDam7_rec_5472-360p.mov >&
ffmpeg-5472-test1.log
ffmpeg version N-69557-gb119945 Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-libx264 --disable-doc --disable-
htmlpages --disable-podpages --disable-ffserver --disable-network
--enable-libfreetype --enable-libfontconfig --enable-shared
libavutil 54. 18.100 / 54. 18.100
libavcodec 56. 21.102 / 56. 21.102
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 9.103 / 5. 9.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with
argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument '99'.
Reading option '-i' ... matched as input file with argument
'20150204_1037_beaverDam7_rec_5472.MOV'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument
'h264'.
Reading option '-s' ... matched as option 's' (set frame size (WxH or
abbreviation)) with argument '640x360'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument
'copy'.
Reading option '20150204_1037_beaverDam7_rec_5472-360p.mov' ... matched as
output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Successfully parsed a group of options.
Parsing a group of options: input file
20150204_1037_beaverDam7_rec_5472.MOV.
Successfully parsed a group of options.
Opening an input file: 20150204_1037_beaverDam7_rec_5472.MOV.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] Format mov,mp4,m4a,3gp,3g2,mj2
probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] ISO: File Type Major Brand: qt
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] Before avformat_find_stream_info()
pos: 55287099 bytes read:73011 seeks:2
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] After avformat_find_stream_info()
pos: 2656256 bytes read:2466043 seeks:4 frames:31
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'20150204_1037_beaverDam7_rec_5472.MOV':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2015-02-04 10:37:32
original_format : DVR-CD
original_format-eng: DVR-CD
comment : HDDVR-Mobius
comment-eng : HDDVR-Mobius
Duration: 00:00:24.00, start: 0.000000, bitrate: 18429 kb/s
Stream #0:0(eng), 30, 1/30000: Video: h264 (High) (avc1 / 0x31637661),
yuv420p(left), 1920x1080 (1920x1088), 1/60000, 17662 kb/s, 30 fps, 30 tbr,
30k tbn, 60k tbc (default)
Metadata:
creation_time : 2015-02-04 10:37:32
handler_name : DataHandler
encoder : h264
Stream #0:1(eng), 1, 1/32000: Audio: pcm_s16le (sowt / 0x74776F73),
32000 Hz, 1 channels, s16, 512 kb/s (default)
Metadata:
creation_time : 2015-02-04 10:37:32
handler_name : DataHandler
Successfully opened the file.
Parsing a group of options: output file
20150204_1037_beaverDam7_rec_5472-360p.mov.
Applying option c:v (codec name) with argument h264.
Applying option s (set frame size (WxH or abbreviation)) with argument
640x360.
Applying option c:a (codec name) with argument copy.
Successfully parsed a group of options.
Opening an output file: 20150204_1037_beaverDam7_rec_5472-360p.mov.
Matched encoder 'libx264' for codec 'h264'.
Successfully opened the file.
detected 1 logical cores
[graph 0 input from stream 0:0 @ 0x8087400] Setting 'video_size' to value
'1920x1080'
[graph 0 input from stream 0:0 @ 0x8087400] Setting 'pix_fmt' to value '0'
[graph 0 input from stream 0:0 @ 0x8087400] Setting 'time_base' to value
'1/30000'
[graph 0 input from stream 0:0 @ 0x8087400] Setting 'pixel_aspect' to
value '0/1'
[graph 0 input from stream 0:0 @ 0x8087400] Setting 'sws_param' to value
'flags=2'
[graph 0 input from stream 0:0 @ 0x8087400] Setting 'frame_rate' to value
'30/1'
[graph 0 input from stream 0:0 @ 0x8087400] w:1920 h:1080 pixfmt:yuv420p
tb:1/30000 fr:30/1 sar:0/1 sws_param:flags=2
[scaler for output stream 0:0 @ 0x8086fe0] Setting 'w' to value '640'
[scaler for output stream 0:0 @ 0x8086fe0] Setting 'h' to value '360'
[scaler for output stream 0:0 @ 0x8086fe0] Setting 'flags' to value '0x4'
[scaler for output stream 0:0 @ 0x8086fe0] w:640 h:360 flags:'0x4'
interl:0
[format @ 0x808eb80] compat: called with
args=[yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16]
[format @ 0x808eb80] Setting 'pix_fmts' to value
'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16'
[AVFilterGraph @ 0x81b75a0] query_formats: 5 queried, 4 merged, 0 already
done, 0 delayed
[scaler for output stream 0:0 @ 0x8086fe0] w:1920 h:1080 fmt:yuv420p
sar:0/1 -> w:640 h:360 fmt:yuv420p sar:0/1 flags:0x4
[libx264 @ 0x80a7360] using cpu capabilities: MMX2 SSE SlowCTZ
[libx264 @ 0x80a7360] profile High, level 3.0
[libx264 @ 0x80a7360] 264 - core 142 r2479 dd79a61 - H.264/MPEG-4 AVC
codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options:
cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1
psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1
cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1
lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0
bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25
scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0
qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mov, to '20150204_1037_beaverDam7_rec_5472-360p.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
comment-eng : HDDVR-Mobius
original_format : DVR-CD
original_format-eng: DVR-CD
comment : HDDVR-Mobius
encoder : Lavf56.19.100
Stream #0:0(eng), 0, 1/15360: Video: h264 (libx264) (avc1 /
0x31637661), yuv420p(left), 640x360, 1/30, q=-1--1, 30 fps, 15360 tbn, 30
tbc (default)
Metadata:
creation_time : 2015-02-04 10:37:32
handler_name : DataHandler
encoder : Lavc56.21.102 libx264
Stream #0:1(eng), 0, 1/32000: Audio: pcm_s16le (sowt / 0x74776F73),
32000 Hz, mono, 512 kb/s (default)
Metadata:
creation_time : 2015-02-04 10:37:32
handler_name : DataHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
Cliping frame in rate conversion by 0.000008
frame= 7 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
frame= 18 fps= 17 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
frame= 29 fps= 18 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
frame= 38 fps= 18 q=0.0 size= 0kB time=00:00:01.00 bitrate=
0.3kbits/s
[libx264 @ 0x80a7360] frame= 0 QP=24.25 NAL=3 Slice:I Poc:0 I:920 P:0
SKIP:0 size=23082 bytes
[libx264 @ 0x80a7360] frame= 1 QP=24.49 NAL=2 Slice:P Poc:6 I:30
P:716 SKIP:174 size=7996 bytes
frame= 43 fps= 15 q=29.0 size= 31kB time=00:00:01.00 bitrate=
254.4kbits/s
[libx264 @ 0x80a7360] frame= 2 QP=29.63 NAL=2 Slice:B Poc:4 I:0
P:513 SKIP:385 size=1381 bytes
[libx264 @ 0x80a7360] frame= 3 QP=27.53 NAL=0 Slice:B Poc:2 I:2
P:556 SKIP:340 size=1388 bytes
[libx264 @ 0x80a7360] frame= 4 QP=23.87 NAL=2 Slice:P Poc:10 I:23
P:756 SKIP:141 size=7939 bytes
[libx264 @ 0x80a7360] frame= 5 QP=27.40 NAL=0 Slice:B Poc:8 I:0
P:534 SKIP:375 size=1325 bytes
frame= 47 fps= 14 q=29.0 size= 51kB time=00:00:01.00 bitrate=
416.2kbits/s
[libx264 @ 0x80a7360] frame= 6 QP=23.42 NAL=2 Slice:P Poc:16 I:106
P:718 SKIP:96 size=8376 bytes
[clipping 90kb of repetitive output]
[libx264 @ 0x80a7360] frame= 701 QP=24.37 NAL=2 Slice:P Poc:404 I:64
P:738 SKIP:118 size=8160 bytes
[libx264 @ 0x80a7360] frame= 702 QP=28.40 NAL=0 Slice:B Poc:402 I:2
P:538 SKIP:331 size=1928 bytes
[libx264 @ 0x80a7360] frame= 703 QP=24.95 NAL=2 Slice:P Poc:408 I:46
P:725 SKIP:149 size=7953 bytes
[libx264 @ 0x80a7360] frame= 704 QP=28.40 NAL=0 Slice:B Poc:406 I:2
P:553 SKIP:318 size=2154 bytes
[libx264 @ 0x80a7360] frame= 705 QP=24.47 NAL=2 Slice:P Poc:412 I:100
P:761 SKIP:59 size=8848 bytes
[libx264 @ 0x80a7360] frame= 706 QP=27.87 NAL=0 Slice:B Poc:410 I:5
P:523 SKIP:339 size=2377 bytes
[libx264 @ 0x80a7360] frame= 707 QP=24.59 NAL=2 Slice:P Poc:416 I:62
P:726 SKIP:132 size=8050 bytes
[libx264 @ 0x80a7360] frame= 708 QP=28.71 NAL=0 Slice:B Poc:414 I:1
P:542 SKIP:326 size=2370 bytes
[libx264 @ 0x80a7360] frame= 709 QP=24.62 NAL=2 Slice:P Poc:420 I:56
P:730 SKIP:134 size=8032 bytes
[libx264 @ 0x80a7360] frame= 710 QP=29.40 NAL=0 Slice:B Poc:418 I:0
P:486 SKIP:378 size=2372 bytes
[libx264 @ 0x80a7360] frame= 711 QP=25.18 NAL=2 Slice:P Poc:424 I:70
P:673 SKIP:177 size=7714 bytes
[libx264 @ 0x80a7360] frame= 712 QP=27.69 NAL=0 Slice:B Poc:422 I:1
P:567 SKIP:315 size=2508 bytes
[libx264 @ 0x80a7360] frame= 713 QP=25.53 NAL=2 Slice:P Poc:428 I:70
P:701 SKIP:149 size=7330 bytes
[libx264 @ 0x80a7360] frame= 714 QP=28.75 NAL=0 Slice:B Poc:426 I:3
P:552 SKIP:319 size=2641 bytes
[libx264 @ 0x80a7360] frame= 715 QP=25.45 NAL=2 Slice:P Poc:432 I:133
P:685 SKIP:102 size=7491 bytes
[libx264 @ 0x80a7360] frame= 716 QP=27.71 NAL=0 Slice:B Poc:430 I:5
P:533 SKIP:334 size=2485 bytes
[libx264 @ 0x80a7360] frame= 717 QP=26.73 NAL=2 Slice:P Poc:436 I:85
P:644 SKIP:191 size=6014 bytes
[libx264 @ 0x80a7360] frame= 718 QP=28.64 NAL=0 Slice:B Poc:434 I:4
P:553 SKIP:324 size=2544 bytes
[libx264 @ 0x80a7360] frame= 719 QP=28.73 NAL=2 Slice:P Poc:438 I:36
P:526 SKIP:358 size=3531 bytes
frame= 720 fps=5.8 q=29.0 Lsize= 6582kB time=00:00:24.00
bitrate=2246.8kbits/s
video:5066kB audio:1500kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: 0.249506%
Input file #0 (20150204_1037_beaverDam7_rec_5472.MOV):
Input stream #0:0 (video): 720 packets read (52986380 bytes); 720 frames
decoded;
Input stream #0:1 (audio): 768 packets read (1536000 bytes);
Total: 1488 packets (54522380 bytes) demuxed
Output file #0 (20150204_1037_beaverDam7_rec_5472-360p.mov):
Output stream #0:0 (video): 720 frames encoded; 720 packets muxed
(5187678 bytes);
Output stream #0:1 (audio): 768 packets muxed (1536000 bytes);
Total: 1488 packets (6723678 bytes) muxed
720 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x80a9c20] Statistics: 64 seeks, 1539 writeouts
[libx264 @ 0x80a7360] frame I:3 Avg QP:23.41 size: 32721
[libx264 @ 0x80a7360] frame P:379 Avg QP:25.40 size: 11296
[libx264 @ 0x80a7360] frame B:338 Avg QP:29.00 size: 2390
[libx264 @ 0x80a7360] consecutive B-frames: 10.1% 77.8% 12.1% 0.0%
[libx264 @ 0x80a7360] mb I I16..4: 5.7% 50.0% 44.3%
[libx264 @ 0x80a7360] mb P I16..4: 1.8% 4.7% 1.8% P16..4: 36.2% 27.3%
18.8% 0.0% 0.0% skip: 9.5%
[libx264 @ 0x80a7360] mb B I16..4: 0.1% 0.2% 0.1% B16..8: 49.6% 10.5%
3.5% direct: 2.5% skip:33.5% L0:33.0% L1:54.8% BI:12.2%
[libx264 @ 0x80a7360] 8x8 transform intra:56.1% inter:48.3%
[libx264 @ 0x80a7360] coded y,uvDC,uvAC intra: 55.2% 21.5% 1.1% inter:
28.2% 6.3% 0.0%
[libx264 @ 0x80a7360] i16 v,h,dc,p: 29% 27% 18% 26%
[libx264 @ 0x80a7360] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 12% 36% 4% 7%
6% 6% 5% 5%
[libx264 @ 0x80a7360] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 21% 9% 23% 8% 9%
8% 7% 8% 7%
[libx264 @ 0x80a7360] i8c dc,h,v,p: 76% 12% 11% 1%
[libx264 @ 0x80a7360] Weighted P-Frames: Y:11.3% UV:0.3%
[libx264 @ 0x80a7360] ref P L0: 71.2% 20.2% 6.3% 2.2% 0.1%
[libx264 @ 0x80a7360] ref B L0: 95.5% 4.4% 0.1%
[libx264 @ 0x80a7360] ref B L1: 97.6% 2.4%
[libx264 @ 0x80a7360] kb/s:1729.00
[AVIOContext @ 0x808eb00] Statistics: 54633703 bytes read, 26 seeks
}}}
Step 2: clip/trim a section of the above file.
{{{
> ffmpeg -v 9 -loglevel 99 -i 20150204_1037_beaverDam7_rec_5472-360p.mov
-ss 12 -t 8 -c copy 20150204_1037_beaverDam7_rec_5472-360p_c12t8.mov >&
ffmpeg-5472-test2.log
ffmpeg version N-69557-gb119945 Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-libx264 --disable-doc --disable-
htmlpages --disable-podpages --disable-ffserver --disable-network
--enable-libfreetype --enable-libfontconfig --enable-shared
libavutil 54. 18.100 / 54. 18.100
libavcodec 56. 21.102 / 56. 21.102
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 9.103 / 5. 9.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with
argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument '99'.
Reading option '-i' ... matched as input file with argument
'20150204_1037_beaverDam7_rec_5472-360p.mov'.
Reading option '-ss' ... matched as option 'ss' (set the start time
offset) with argument '12'.
Reading option '-t' ... matched as option 't' (record or transcode
"duration" seconds of audio/video) with argument '8'.
Reading option '-c' ... matched as option 'c' (codec name) with argument
'copy'.
Reading option '20150204_1037_beaverDam7_rec_5472-360p_c12t8.mov' ...
matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Successfully parsed a group of options.
Parsing a group of options: input file
20150204_1037_beaverDam7_rec_5472-360p.mov.
Successfully parsed a group of options.
Opening an input file: 20150204_1037_beaverDam7_rec_5472-360p.mov.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] Format mov,mp4,m4a,3gp,3g2,mj2
probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] ISO: File Type Major Brand: qt
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] Before avformat_find_stream_info()
pos: 6740454 bytes read:49507 seeks:1
[h264 @ 0x8097220] no picture
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] After avformat_find_stream_info()
pos: 35233 bytes read:115043 seeks:2 frames:4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'20150204_1037_beaverDam7_rec_5472-360p.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf56.19.100
comment : HDDVR-Mobius
comment-eng : HDDVR-Mobius
Duration: 00:00:24.00, start: 0.000000, bitrate: 2246 kb/s
Stream #0:0(eng), 3, 1/15360: Video: h264 (High) (avc1 / 0x31637661),
yuv420p(left), 640x360 (640x368), 1/60, 1729 kb/s, 30 fps, 30 tbr, 15360
tbn, 60 tbc (default)
Metadata:
handler_name : DataHandler
encoder : Lavc56.21.102 libx264
Stream #0:1(eng), 1, 1/32000: Audio: pcm_s16le (sowt / 0x74776F73),
32000 Hz, mono, s16, 512 kb/s (default)
Metadata:
handler_name : DataHandler
Successfully opened the file.
Parsing a group of options: output file
20150204_1037_beaverDam7_rec_5472-360p_c12t8.mov.
Applying option ss (set the start time offset) with argument 12.
Applying option t (record or transcode "duration" seconds of audio/video)
with argument 8.
Applying option c (codec name) with argument copy.
Successfully parsed a group of options.
Opening an output file: 20150204_1037_beaverDam7_rec_5472-360p_c12t8.mov.
Successfully opened the file.
[mov @ 0x816fbe0] timecode: tbc=15360/1 invalid, fallback on 30/1
Output #0, mov, to '20150204_1037_beaverDam7_rec_5472-360p_c12t8.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
comment-eng : HDDVR-Mobius
comment : HDDVR-Mobius
encoder : Lavf56.19.100
Stream #0:0(eng), 0, 1/15360: Video: h264 (avc1 / 0x31637661),
yuv420p(left), 640x360 (0x0), 1/15360, q=2-31, 1729 kb/s, 30 fps, 30 tbr,
15360 tbn, 15360 tbc (default)
Metadata:
handler_name : DataHandler
encoder : Lavc56.21.102 libx264
Stream #0:1(eng), 0, 1/32000: Audio: pcm_s16le (sowt / 0x74776F73),
32000 Hz, mono, 512 kb/s (default)
Metadata:
handler_name : DataHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
No more output streams to write to, finishing.
frame= 102 fps=0.0 q=-1.0 Lsize= 1194kB time=00:00:08.00
bitrate=1222.9kbits/s
video:691kB audio:500kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.294840%
Input file #0 (20150204_1037_beaverDam7_rec_5472-360p.mov):
Input stream #0:0 (video): 603 packets read (4613823 bytes);
Input stream #0:1 (audio): 641 packets read (1282048 bytes);
Total: 1244 packets (5895871 bytes) demuxed
Output file #0 (20150204_1037_beaverDam7_rec_5472-360p_c12t8.mov):
Output stream #0:0 (video): 102 packets muxed (707304 bytes);
Output stream #0:1 (audio): 256 packets muxed (512000 bytes);
Total: 358 packets (1219304 bytes) muxed
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x8099ec0] Statistics: 64 seeks, 408 writeouts
[AVIOContext @ 0x808eb00] Statistics: 5947747 bytes read, 2 seeks
}}}
This results in a very out of sync video. The time marker starts at 4
seconds, or specifically A: 0.0 V: 4.4
and the video only lasts 4 seconds, as the audio and video arrive at 8
seconds separately. Also the footsteps are clearly out of sync. The video
stops while the audio continues to play the correct clip starting and
ending points.
Since this did not duplicate my earlier report (Jan22 on ffmpeg-users), I
adjust the starting sec to reproduce it.
{{{
> ffmpeg -v 9 -loglevel 99 -i 20150204_1037_beaverDam7_rec_5472-360p.mov
-ss 3 -t 2 -c copy 20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov >&
ffmpeg-5472-test3.log
ffmpeg version N-69557-gb119945 Copyright (c) 2000-2015 the FFmpeg
developers
built with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-libx264 --disable-doc --disable-
htmlpages --disable-podpages --disable-ffserver --disable-network
--enable-libfreetype --enable-libfontconfig --enable-shared
libavutil 54. 18.100 / 54. 18.100
libavcodec 56. 21.102 / 56. 21.102
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 9.103 / 5. 9.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with
argument '9'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging
level) with argument '99'.
Reading option '-i' ... matched as input file with argument
'20150204_1037_beaverDam7_rec_5472-360p.mov'.
Reading option '-ss' ... matched as option 'ss' (set the start time
offset) with argument '3'.
Reading option '-t' ... matched as option 't' (record or transcode
"duration" seconds of audio/video) with argument '2'.
Reading option '-c' ... matched as option 'c' (codec name) with argument
'copy'.
Reading option '20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov' ...
matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument 9.
Successfully parsed a group of options.
Parsing a group of options: input file
20150204_1037_beaverDam7_rec_5472-360p.mov.
Successfully parsed a group of options.
Opening an input file: 20150204_1037_beaverDam7_rec_5472-360p.mov.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] Format mov,mp4,m4a,3gp,3g2,mj2
probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] ISO: File Type Major Brand: qt
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] Before avformat_find_stream_info()
pos: 6740454 bytes read:49507 seeks:1
[h264 @ 0x8097220] no picture
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x80969e0] After avformat_find_stream_info()
pos: 35233 bytes read:115043 seeks:2 frames:4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'20150204_1037_beaverDam7_rec_5472-360p.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf56.19.100
comment : HDDVR-Mobius
comment-eng : HDDVR-Mobius
Duration: 00:00:24.00, start: 0.000000, bitrate: 2246 kb/s
Stream #0:0(eng), 3, 1/15360: Video: h264 (High) (avc1 / 0x31637661),
yuv420p(left), 640x360 (640x368), 1/60, 1729 kb/s, 30 fps, 30 tbr, 15360
tbn, 60 tbc (default)
Metadata:
handler_name : DataHandler
encoder : Lavc56.21.102 libx264
Stream #0:1(eng), 1, 1/32000: Audio: pcm_s16le (sowt / 0x74776F73),
32000 Hz, mono, s16, 512 kb/s (default)
Metadata:
handler_name : DataHandler
Successfully opened the file.
Parsing a group of options: output file
20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov.
Applying option ss (set the start time offset) with argument 3.
Applying option t (record or transcode "duration" seconds of audio/video)
with argument 2.
Applying option c (codec name) with argument copy.
Successfully parsed a group of options.
Opening an output file: 20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov.
Successfully opened the file.
[mov @ 0x816fbe0] timecode: tbc=15360/1 invalid, fallback on 30/1
Output #0, mov, to '20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
comment-eng : HDDVR-Mobius
comment : HDDVR-Mobius
encoder : Lavf56.19.100
Stream #0:0(eng), 0, 1/15360: Video: h264 (avc1 / 0x31637661),
yuv420p(left), 640x360 (0x0), 1/15360, q=2-31, 1729 kb/s, 30 fps, 30 tbr,
15360 tbn, 15360 tbc (default)
Metadata:
handler_name : DataHandler
encoder : Lavc56.21.102 libx264
Stream #0:1(eng), 0, 1/32000: Audio: pcm_s16le (sowt / 0x74776F73),
32000 Hz, mono, 512 kb/s (default)
Metadata:
handler_name : DataHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
No more output streams to write to, finishing.
frame= 0 fps=0.0 q=-1.0 Lsize= 126kB time=00:00:02.00 bitrate=
514.9kbits/s
video:0kB audio:125kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.573438%
Input file #0 (20150204_1037_beaverDam7_rec_5472-360p.mov):
Input stream #0:0 (video): 251 packets read (1907581 bytes);
Input stream #0:1 (audio): 265 packets read (530432 bytes);
Total: 516 packets (2438013 bytes) demuxed
Output file #0 (20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov):
Output stream #0:0 (video): 0 packets muxed (0 bytes);
Output stream #0:1 (audio): 64 packets muxed (128000 bytes);
Total: 64 packets (128000 bytes) muxed
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x8099ec0] Statistics: 32 seeks, 89 writeouts
[AVIOContext @ 0x808eb00] Statistics: 2507107 bytes read, 2 seeks
}}}
{{{
> ffprobe 20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov
ffprobe version N-69557-gb119945 Copyright (c) 2007-2015 the FFmpeg
developers
built with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-libx264 --disable-doc --disable-
htmlpages --disable-podpages --disable-ffserver --disable-network
--enable-libfreetype --enable-libfontconfig --enable-shared
libavutil 54. 18.100 / 54. 18.100
libavcodec 56. 21.102 / 56. 21.102
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 9.103 / 5. 9.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'20150204_1037_beaverDam7_rec_5472-360p_c3t2.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf56.19.100
comment : HDDVR-Mobius
comment-eng : HDDVR-Mobius
Duration: 00:00:02.00, start: 0.000000, bitrate: 514 kb/s
Stream #0:0(eng): Audio: pcm_s16le (sowt / 0x74776F73), 32000 Hz,
mono, s16, 512 kb/s (default)
Metadata:
handler_name : DataHandler
}}}
Notice there is no video stream in the test3 output.
Also the tbc don't match. Step 1 wrote the tbc as 30 (default), it becomes
60 (default) at the 2nd stage input, and then 15360 (default) at the last
output.
Which tbc is (default)? The meaning of default is lost and confusing.
Error message: '''tbc=15360/1 invalid''' seems like perhaps it is
confusing tbc and tbn?
Source file 52Mb:
[http://seahorseCorral.org/videos/tests/20150204_1037_beaverDam7_rec_5472.MOV]
This seems to be reproducable with any video file I try it on, the problem
starts after re-encoding with ffmpeg to h264. Any subsequent attempts at
processing (serially) result in bugs.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4297>
FFmpeg <https://ffmpeg.org>
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