#2863: libwavpack: Output too short ---------------------------------+-------------------------------------- Reporter: lachs0r | Type: defect Status: new | Priority: normal Component: avcodec | Version: git-master Keywords: wavpack | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | ---------------------------------+-------------------------------------- When trying to convert audio files with a certain length to WavPack using the libwavpack encoder, the resulting file is shorter than expected and tools like wvgain complain about an incorrect number of samples. ffmpeg outputs a warning when that happens, e.g.: [libwavpack @ 0x2335b00] 1 frames left in the queue on closing Log: {{{ ffmpeg -y -i 404.wav -c:a libwavpack -ss 228.06 -to 442.85 out.wv -report ffmpeg version N-55519-g7ec7d62 Copyright (c) 2000-2013 the FFmpeg developers built on Aug 14 2013 11:31:24 with gcc 4.8 (SUSE Linux) configuration: --prefix=/usr --libdir=/usr/lib64 --enable-gpl --enable- version3 --enable-nonfree --enable-static --disable-shared --enable-pic --enable-libvorbis --enable-libmp3lame --enable-libwavpack --enable- avresample libavutil 52. 42.100 / 52. 42.100 libavcodec 55. 27.100 / 55. 27.100 libavformat 55. 13.102 / 55. 13.102 libavdevice 55. 3.100 / 55. 3.100 libavfilter 3. 82.100 / 3. 82.100 libavresample 1. 1. 0 / 1. 1. 0 libswscale 2. 4.100 / 2. 4.100 libswresample 0. 17.103 / 0. 17.103 libpostproc 52. 3.100 / 52. 3.100 Splitting the commandline. Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'. Reading option '-i' ... matched as input file with argument '404.wav'. Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'libwavpack'. Reading option '-ss' ... matched as option 'ss' (set the start time offset) with argument '228.06'. Reading option '-to' ... matched as option 'to' (record or transcode stop time) with argument '442.85'. Reading option 'out.wv' ... matched as output file. Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'. Finished splitting the commandline. Parsing a group of options: global . Applying option y (overwrite output files) with argument 1. Applying option report (generate a report) with argument 1. Successfully parsed a group of options. Parsing a group of options: input file 404.wav. Successfully parsed a group of options. Opening an input file: 404.wav. [wav @ 0x35672c0] Format wav probed with size=2048 and score=99 [wav @ 0x35672c0] File position before avformat_find_stream_info() is 80 [wav @ 0x35672c0] parser not found for codec pcm_s16le, packets or times may be invalid. [wav @ 0x35672c0] probing stream 0 pp:4 [wav @ 0x35672c0] probing stream 0 pp:3 [wav @ 0x35672c0] probing stream 0 pp:2 [wav @ 0x35672c0] probing stream 0 pp:1 [wav @ 0x35672c0] probed stream 0 [wav @ 0x35672c0] parser not found for codec pcm_s16le, packets or times may be invalid. [wav @ 0x35672c0] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x35672c0] File position after avformat_find_stream_info() is 897104 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, wav, from '404.wav': Metadata: encoder : Lavf55.13.102 Duration: 00:35:50.40, bitrate: 1411 kb/s Stream #0:0, 218, 1/44100: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s Successfully opened the file. Parsing a group of options: output file out.wv. Applying option c:a (codec name) with argument libwavpack. Applying option ss (set the start time offset) with argument 228.06. Applying option to (record or transcode stop time) with argument 442.85. Successfully parsed a group of options. Opening an output file: out.wv. Successfully opened the file. detected 4 logical cores [graph 0 input from stream 0:0 @ 0x3579940] Setting 'time_base' to value '1/44100' [graph 0 input from stream 0:0 @ 0x3579940] Setting 'sample_rate' to value '44100' [graph 0 input from stream 0:0 @ 0x3579940] Setting 'sample_fmt' to value 's16' [graph 0 input from stream 0:0 @ 0x3579940] Setting 'channel_layout' to value '0x3' [graph 0 input from stream 0:0 @ 0x3579940] tb:1/44100 samplefmt:s16 samplerate:44100 chlayout:0x3 [audio format for output stream 0:0 @ 0x3579ec0] Setting 'sample_fmts' to value 's32' [audio format for output stream 0:0 @ 0x3579ec0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0' [AVFilterGraph @ 0x35581a0] query_formats: 5 queried, 9 merged, 3 already done, 0 delayed [auto-inserted resampler 0 @ 0x357cf80] ch:2 chl:stereo fmt:s16 r:44100Hz -> ch:2 chl:stereo fmt:s32 r:44100Hz Output #0, wv, to 'out.wv': Metadata: encoder : Lavf55.13.102 Stream #0:0, 0, 1/90000: Audio: wavpack (libwavpack), 44100 Hz, stereo, s32, 128 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le -> libwavpack) Press [q] to stop, [?] for help size= 5646kB time=00:00:46.81 bitrate= 988.0kbits/s size= 12936kB time=00:01:42.53 bitrate=1033.5kbits/s size= 20328kB time=00:02:38.26 bitrate=1052.2kbits/s [output stream 0:0 @ 0x357af00] EOF on sink link output stream 0:0:default. No more output streams to write to, finishing. size= 27489kB time=00:03:34.73 bitrate=1048.7kbits/s video:0kB audio:27489kB subtitle:0 global headers:0kB muxing overhead 0.000330% [libwavpack @ 0x3577f20] 1 frames left in the queue on closing 19073 frames successfully decoded, 0 decoding errors [AVIOContext @ 0x35787e0] Statistics: 2 seeks, 1053 writeouts [AVIOContext @ 0x356f8a0] Statistics: 78151680 bytes read, 0 seeks }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2863> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker