Opened 12 years ago
Closed 12 years ago
#2552 closed defect (fixed)
FLAC with wrong but valid 'header' makes decoder misbehave
| Reported by: | Martijn van Beurden | Owned by: | |
|---|---|---|---|
| Priority: | important | Component: | avcodec |
| Version: | git-master | Keywords: | flac regression |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | yes | |
| Analyzed by developer: | no |
Description
Summary of the bug: I found a file where libavcodec thinks the file is 8kHz, 3 channel while the file is 44.1kHz and stereo. With ghex I found out this is probably because there is a valid header (CRC checks out) somewhere halfway a block. While this is only one header versus 11 valid ones, libavcodec thinks this one is valid and the rest is garbage.
How to reproduce:
- Get flac-file-with-valid-header-in-last-block.flac from upload.ffmpeg.org/incoming
- Try 'ffmpeg -i flac-file-with-valid-header-in-last-block.flac test.wav' and see that the resulting file is 8kHz, 3-channel
Output:
ffmpeg -loglevel 99 -i flac-file-with-valid-header-in-last-block.flac -f null /dev/null
ffmpeg version N-52792-g7c23922 Copyright (c) 2000-2013 the FFmpeg developers
built on May 5 2013 22:10:53 with gcc 4.7 (Ubuntu/Linaro 4.7.2-2ubuntu1)
configuration: --enable-libx264 --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-gpl
libavutil 52. 29.100 / 52. 29.100
libavcodec 55. 7.100 / 55. 7.100
libavformat 55. 4.101 / 55. 4.101
libavdevice 55. 0.100 / 55. 0.100
libavfilter 3. 63.101 / 3. 63.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '99'.
Reading option '-i' ... matched as input file with argument 'flac-file-with-valid-header-in-last-block.flac'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'null'.
Reading option '/dev/null' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument 99.
Successfully parsed a group of options.
Parsing a group of options: input file flac-file-with-valid-header-in-last-block.flac.
Successfully parsed a group of options.
Opening an input file: flac-file-with-valid-header-in-last-block.flac.
[flac @ 0x1e997c0] Format flac probed with size=2048 and score=50
[flac @ 0x1e997c0] File position before avformat_find_stream_info() is 8304
[flac @ 0x1e9a1e0] sample rate change detected in adjacent frames
[flac @ 0x1e9a1e0] bits per sample change detected in adjacent frames
[flac @ 0x1e9a1e0] number of channels change detected in adjacent frames
[flac @ 0x1e9a1e0] sample/frame number mismatch in adjacent frames
[flac @ 0x1e9a1e0] crc check failed from offset 518995 (frame 8) to 567270 (frame 65)
[flac @ 0x1e9a1e0] sample rate change detected in adjacent frames
[flac @ 0x1e9a1e0] bits per sample change detected in adjacent frames
[flac @ 0x1e9a1e0] number of channels change detected in adjacent frames
[flac @ 0x1e9a1e0] sample/frame number mismatch in adjacent frames
[flac @ 0x1e9a1e0] crc check failed from offset 443570 (frame 7) to 567270 (frame 65)
[flac @ 0x1e9a1e0] sample/frame number mismatch in adjacent frames
[flac @ 0x1e9a1e0] sample rate change detected in adjacent frames
[flac @ 0x1e9a1e0] bits per sample change detected in adjacent frames
[flac @ 0x1e9a1e0] number of channels change detected in adjacent frames
[flac @ 0x1e9a1e0] sample/frame number mismatch in adjacent frames
[flac @ 0x1e9a1e0] crc check failed from offset 371506 (frame 6) to 567270 (frame 65)
[flac @ 0x1e9a1e0] sample/frame number mismatch in adjacent frames
Last message repeated 11 times
[flac @ 0x1e9a1e0] Junk frame till offset 48275
[flac @ 0x1e997c0] max_analyze_duration 5000000 reached at 5062721 microseconds
[flac @ 0x1e997c0] File position after avformat_find_stream_info() is 579223
Input #0, flac, from 'flac-file-with-valid-header-in-last-block.flac':
Duration: 00:00:07.40, bitrate: 626 kb/s
Stream #0:0, 8, 1/44100: Audio: flac, 8000 Hz, 3.0, s16
Successfully opened the file.
Parsing a group of options: output file /dev/null.
Applying option f (force format) with argument null.
Successfully parsed a group of options.
Opening an output file: /dev/null.
Successfully opened the file.
[graph 0 input from stream 0:0 @ 0x1e9a6e0] Setting 'time_base' to value '1/8000'
[graph 0 input from stream 0:0 @ 0x1e9a6e0] Setting 'sample_rate' to value '8000'
[graph 0 input from stream 0:0 @ 0x1e9a6e0] Setting 'sample_fmt' to value 's16'
[graph 0 input from stream 0:0 @ 0x1e9a6e0] Setting 'channel_layout' to value '0x7'
[graph 0 input from stream 0:0 @ 0x1e9a6e0] tb:1/8000 samplefmt:s16 samplerate:8000 chlayout:0x7
[audio format for output stream 0:0 @ 0x1e9e300] Setting 'sample_fmts' to value 's16'
[AVFilterGraph @ 0x1e9b1a0] query_formats: 4 queried, 9 merged, 0 already done, 0 delayed
Output #0, null, to '/dev/null':
Metadata:
encoder : Lavf55.4.101
Stream #0:0, 0, 1/90000: Audio: pcm_s16le, 8000 Hz, 3.0, s16, 384 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (flac -> pcm_s16le)
Press [q] to stop, [?] for help
Input stream #0:0 frame changed from rate:8000 fmt:s16 ch:3 chl:3.0 to rate:44100 fmt:s16 ch:2 chl:stereo
[graph 0 input from stream 0:0 @ 0x1e9e280] Setting 'time_base' to value '1/44100'
[graph 0 input from stream 0:0 @ 0x1e9e280] Setting 'sample_rate' to value '44100'
[graph 0 input from stream 0:0 @ 0x1e9e280] Setting 'sample_fmt' to value 's16'
[graph 0 input from stream 0:0 @ 0x1e9e280] Setting 'channel_layout' to value '0x3'
[graph 0 input from stream 0:0 @ 0x1e9e280] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3
[audio format for output stream 0:0 @ 0x1e9f140] Setting 'sample_fmts' to value 's16'
[audio format for output stream 0:0 @ 0x1e9f140] Setting 'sample_rates' to value '8000'
[audio format for output stream 0:0 @ 0x1e9f140] Setting 'channel_layouts' to value '0x7'
[audio format for output stream 0:0 @ 0x1e9f140] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0'
[AVFilterGraph @ 0x1e9df60] query_formats: 4 queried, 9 merged, 3 already done, 0 delayed
1.000000 0.000000
0.000000 1.000000
0.000000 0.000000
[auto-inserted resampler 0 @ 0x1ea1960] ch:2 chl:stereo fmt:s16 r:44100Hz -> ch:3 chl:3.0 fmt:s16 r:8000Hz
[flac @ 0x1e9a1e0] CRC error at PTS -9223372036854775808
[flac @ 0x1e9a1e0] overread: 1
Error while decoding stream #0:0: Invalid data found when processing input
[flac @ 0x1e9a1e0] switching bps mid-stream is not supported
[flac @ 0x1e9a1e0] decode_frame() failed
Error while decoding stream #0:0: Operation not permitted
[output stream 0:0 @ 0x1e9de80] EOF on sink link output stream 0:0:default.
No more output streams to write to, finishing.
size=N/A time=00:00:07.40 bitrate=N/A
video:0kB audio:347kB subtitle:0 global headers:0kB muxing overhead -100.006195%
9 frames successfully decoded, 2 decoding errors
[AVIOContext @ 0x1ea1ee0] Statistics: 579223 bytes read, 0 seeks
Attachments (1)
Change History (4)
by , 12 years ago
| Attachment: | flac-file-with-valid-header-in-last-block.flac added |
|---|
comment:1 by , 12 years ago
| Keywords: | regression added |
|---|---|
| Priority: | normal → important |
| Reproduced by developer: | set |
| Status: | new → open |
comment:3 by , 12 years ago
| Resolution: | → fixed |
|---|---|
| Status: | open → closed |
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