Ticket #1916 (closed defect: wontfix)
mxf format pcm_s24le decoding is broken.
|Reported by:||dem0n||Owned by:|
|Blocking:||Reproduced by developer:||yes|
|Analyzed by developer:||no|
Summary of the bug:
I am trying to extract audio stream from mxf file and transcode it from pcm_s24le to pcm_s16le audio, but ffmpeg returns broken file instead. ffmpeg versions used: 1.0 and N-46710-g4facddd (from git). In ffmpeg 0.7.13 this is working well with the same sample-file.
How to reproduce:
To reproduce this behavior please use pcm_s24le_to_pcm_s16le.mxf sample-file, which was uploaded to ffmpeg public ftp and run ffmpeg with following params:
~/ffmpeg-git-20121113/bin/ffmpeg -y -i ./pcm_s24le_to_pcm_s16le.mxf -vn -map 0:0 -acodec pcm_s16le ./a0_0:0.wav ---- Detailed ffmpeg output: $ ~/ffmpeg-git-20121113/bin/ffmpeg -v 9 -loglevel 99 -y -i ./pcm_s24le_to_pcm_s16le.mxf -vn -map 0:0 -acodec pcm_s16le ./a0_0:0.wav ffmpeg version N-46710-g4facddd Copyright (c) 2000-2012 the FFmpeg developers built on Nov 13 2012 18:33:45 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5) configuration: --enable-libx264 --prefix=/home/mkproxy-test/ffmpeg-git-20121113 --enable-gpl --enable-shared libavutil 52. 6.100 / 52. 6.100 libavcodec 54. 71.100 / 54. 71.100 libavformat 54. 36.100 / 54. 36.100 libavdevice 54. 3.100 / 54. 3.100 libavfilter 3. 23.100 / 3. 23.100 libswscale 2. 1.102 / 2. 1.102 libswresample 0. 16.100 / 0. 16.100 libpostproc 52. 1.100 / 52. 1.100 [mxf @ 0x1dd0280] Format mxf probed with size=2048 and score=100 [mxf @ 0x1dd0280] File position before avformat_find_stream_info() is 11741 [mxf @ 0x1dd0280] KLV for edit unit 0 extends into next edit unit - OPAtom misinterpreted as OP1a? [mxf @ 0x1dd0280] If you want to help, upload a sample of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ and contact the ffmpeg-devel mailing list. [mxf @ 0x1dd0280] File position after avformat_find_stream_info() is 11765 Guessed Channel Layout for Input Stream #0.0 : mono Input #0, mxf, from './pcm_s24le_to_pcm_s16le.mxf': Metadata: timecode : 00:58:00:00 Duration: 01:55:06.90, start: 0.000000, bitrate: 10 kb/s Stream #0:0, 0, 1001/24000: Audio: pcm_s24le, 48000 Hz, mono, s32, 1152 kb/s [abuffer @ 0x1dd3360] Setting entry with key 'time_base' to value '1/48000' [abuffer @ 0x1dd3360] Setting entry with key 'sample_rate' to value '48000' [abuffer @ 0x1dd3360] Setting entry with key 'sample_fmt' to value 's32' [abuffer @ 0x1dd3360] Setting entry with key 'channel_layout' to value '0x4' [graph 0 input from stream 0:0 @ 0x1dd37e0] tb:1/48000 samplefmt:s32 samplerate:48000 chlayout:0x4 [aformat @ 0x1dd3640] Setting entry with key 'sample_fmts' to value 's16' [audio format for output stream 0:0 @ 0x1dd3dc0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0' [auto-inserted resampler 0 @ 0x1dd4f40] chl:mono fmt:s32 r:48000Hz -> chl:mono fmt:s16 r:48000Hz Output #0, wav, to './a0_0:0.wav': Metadata: ISMP : 00:58:00:00 ISFT : Lavf54.36.100 Stream #0:0, 0, 1/48000: Audio: pcm_s16le ( / 0x0001), 48000 Hz, mono, s16, 768 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s24le -> pcm_s16le) Press [q] to stop, [?] for help ./pcm_s24le_to_pcm_s16le.mxf: Operation not permitted [output stream 0:0 @ 0x1dd3d60] EOF on sink link output stream 0:0:default. No more output streams to write to, finishing. size= 0kB time=00:00:00.00 bitrate= 0.0kbits/s video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead inf% Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used) Statistics: 9458516 bytes read, 2 seeks
Thanks in advance!
- Status changed from new to open
- Reproduced by developer set
- Component changed from FFmpeg to avformat
- Summary changed from mxf format pcm_s24le to pcm_s16le audio transcoding is broken. to mxf format pcm_s24le decoding is broken.
- Version changed from 1.0 to git-master
- Keywords mxf regression added; ffmpeg, mxf, pcm_s24le, pcm_s16le, audio transcoding removed
- Status changed from open to closed
- Resolution set to invalid