Opened 10 days ago
Closed 10 days ago
#10977 closed defect (invalid)
confused pipes
Reported by: | Nils Goroll | Owned by: | |
---|---|---|---|
Priority: | normal | Component: | ffmpeg |
Version: | git-master | Keywords: | pipe |
Cc: | Blocked By: | ||
Blocking: | Reproduced by developer: | no | |
Analyzed by developer: | no |
Description
Summary of the bug: using more than one output pipe leads to missing and corrupt output
How to reproduce:
#!/bin/bash input=video.mkv runtest () { echo echo case ${tc} echo ============================ rm -f named_pipe ${tc}_* mknod named_pipe p cat named_pipe >${tc}_pipe & catpid=$! cat ${input} | ffmpeg -i - "${args[@]}" | cat >${tc}_fd1 kill $catpid 2>/dev/null echo ---------------------------- ls -als ${tc}_* for f in ${tc}_* ; do echo echo $f: ffprobe -hide_banner ${f} done } tc=fd1_np args=( -f matroska -map 0:v -vcodec copy pipe:1 -f wav -map 0:a -acodec pcm_s32le pipe:named_pipe ) runtest # tc=fd1_file args=( -y -f matroska -map 0:v -vcodec copy pipe:1 -f wav -map 0:a -acodec pcm_s32le named_pipe ) runtest exit ## same as fd1_np tc=np_fd1 args=( -f wav -map 0:a -acodec pcm_s32le pipe:named_pipe -f matroska -map 0:v -vcodec copy pipe:1 ) runtest
output:
case fd1_np ============================ ffmpeg version N-115007-g1f8e5b6d95-1 Copyright (c) 2000-2024 the FFmpeg developers built with gcc 12 (Debian 12.2.0-14) configuration: --prefix=/usr/local --extra-version=1 --toolchain=hardened --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --disable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --disable-shared --enable-libfdk-aac --enable-nonfree libavutil 59. 16.101 / 59. 16.101 libavcodec 61. 5.103 / 61. 5.103 libavformat 61. 3.102 / 61. 3.102 libavdevice 61. 2.100 / 61. 2.100 libavfilter 10. 2.101 / 10. 2.101 libswscale 8. 2.100 / 8. 2.100 libswresample 5. 2.100 / 5. 2.100 libpostproc 58. 2.100 / 58. 2.100 Input #0, matroska,webm, from 'fd:': Metadata: ENCODER : Lavf59.27.100 Duration: 00:01:00.00, start: 0.000000, bitrate: N/A Stream #0:0: Video: h264 (High), yuv420p(progressive), 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1k tbn Metadata: ENCODER : Lavc59.37.100 libx264 DURATION : 00:01:00.003000000 Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp Metadata: ENCODER : Lavc59.37.100 libvorbis DURATION : 00:01:00.003000000 Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #1:0 (vorbis (native) -> pcm_s32le (native)) Output #0, matroska, to 'pipe:1': Metadata: encoder : Lavf61.3.102 Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(progressive), 320x240 [SAR 1:1 DAR 4:3], q=2-31, 25 fps, 25 tbr, 1k tbn Metadata: ENCODER : Lavc59.37.100 libx264 DURATION : 00:01:00.003000000 Output #1, wav, to 'pipe:named_pipe': Metadata: ISFT : Lavf61.3.102 Stream #1:0: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32, 3072 kb/s Metadata: DURATION : 00:01:00.003000000 encoder : Lavc61.5.103 pcm_s32le [out#0/matroska @ 0x557d535f8940] video:26KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 39.822365% [out#1/wav @ 0x557d535f9a40] video:0KiB audio:22500KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.000443% size= 36KiB time=00:00:59.92 bitrate= 4.9kbits/s speed=1.04e+03x ---------------------------- 1 -rw-r--r-- 1 slink slink 23076625 Apr 25 18:54 fd1_np_fd1 1 -rw-r--r-- 1 slink slink 0 Apr 25 18:54 fd1_np_pipe fd1_np_fd1: [matroska,webm @ 0x55de843c8b40] 0x00 at pos 2160 (0x870) invalid as first byte of an EBML number [matroska,webm @ 0x55de843c8b40] Duplicate element [matroska,webm @ 0x55de843c8b40] 0x00 at pos 110 (0x6e) invalid as first byte of an EBML number [matroska,webm @ 0x55de843c8b40] Duplicate element [matroska,webm @ 0x55de843c8b40] 0x00 at pos 202 (0xca) invalid as first byte of an EBML number [matroska,webm @ 0x55de843c8b40] Element at 0x67 ending at 0x83ec0100000070 exceeds containing master element ending at 0x1413 [matroska,webm @ 0x55de843c8b40] 0x00 at pos 704676 (0xac0a4) invalid as first byte of an EBML number [matroska,webm @ 0x55de843c8b40] Length 5 indicated by an EBML number's first byte 0x09 at pos 2985599 (0x2d8e7f) exceeds max length 4. [matroska,webm @ 0x55de843c8b40] 0x00 at pos 2193011 (0x217673) invalid as first byte of an EBML number [matroska,webm @ 0x55de843c8b40] Could not find codec parameters for stream 1 (Video: h264, none(progressive), 320x240): unspecified pixel format Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options Input #0, matroska,webm, from 'fd1_np_fd1': Metadata: ENCODER : Lavf61.3.102 Duration: 00:01:00.00, start: 0.003000, bitrate: 3076 kb/s Stream #0:0: Video: h264 (High), yuv420p(progressive), 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1k tbn Metadata: ENCODER : Lavc59.37.100 libx264 Stream #0:1: Video: h264, none(progressive), 320x240, SAR 1:1 DAR 4:3, 25 fps, 25 tbr, 1k tbn Metadata: ENCODER : Lavc59.37.100 libx264 fd1_np_pipe: fd1_np_pipe: Invalid data found when processing input case fd1_file ============================ ffmpeg version N-115007-g1f8e5b6d95-1 Copyright (c) 2000-2024 the FFmpeg developers built with gcc 12 (Debian 12.2.0-14) configuration: --prefix=/usr/local --extra-version=1 --toolchain=hardened --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --disable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --disable-shared --enable-libfdk-aac --enable-nonfree libavutil 59. 16.101 / 59. 16.101 libavcodec 61. 5.103 / 61. 5.103 libavformat 61. 3.102 / 61. 3.102 libavdevice 61. 2.100 / 61. 2.100 libavfilter 10. 2.101 / 10. 2.101 libswscale 8. 2.100 / 8. 2.100 libswresample 5. 2.100 / 5. 2.100 libpostproc 58. 2.100 / 58. 2.100 Input #0, matroska,webm, from 'fd:': Metadata: ENCODER : Lavf59.27.100 Duration: 00:01:00.00, start: 0.000000, bitrate: N/A Stream #0:0: Video: h264 (High), yuv420p(progressive), 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1k tbn Metadata: ENCODER : Lavc59.37.100 libx264 DURATION : 00:01:00.003000000 Stream #0:1: Audio: vorbis, 48000 Hz, stereo, fltp Metadata: ENCODER : Lavc59.37.100 libvorbis DURATION : 00:01:00.003000000 Stream mapping: Stream #0:0 -> #0:0 (copy) Stream #0:1 -> #1:0 (vorbis (native) -> pcm_s32le (native)) Output #0, matroska, to 'pipe:1': Metadata: encoder : Lavf61.3.102 Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(progressive), 320x240 [SAR 1:1 DAR 4:3], q=2-31, 25 fps, 25 tbr, 1k tbn Metadata: ENCODER : Lavc59.37.100 libx264 DURATION : 00:01:00.003000000 Output #1, wav, to 'named_pipe': Metadata: ISFT : Lavf61.3.102 Stream #1:0: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32, 3072 kb/s Metadata: DURATION : 00:01:00.003000000 encoder : Lavc61.5.103 pcm_s32le [out#0/matroska @ 0x560e5ff71b40] video:26KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 39.822365% [out#1/wav @ 0x560e5ff73d00] video:0KiB audio:22500KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.000443% size= 36KiB time=00:00:59.92 bitrate= 4.9kbits/s speed=1e+03x ---------------------------- 1 -rw-r--r-- 1 slink slink 36523 Apr 25 18:54 fd1_file_fd1 1 -rw-r--r-- 1 slink slink 23040102 Apr 25 18:54 fd1_file_pipe fd1_file_fd1: Input #0, matroska,webm, from 'fd1_file_fd1': Metadata: ENCODER : Lavf61.3.102 Duration: 00:01:00.00, start: 0.003000, bitrate: 4 kb/s Stream #0:0: Video: h264 (High), yuv420p(progressive), 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 1k tbn Metadata: ENCODER : Lavc59.37.100 libx264 fd1_file_pipe: [wav @ 0x55a0af5fba40] Ignoring maximum wav data size, file may be invalid [wav @ 0x55a0af5fba40] Estimating duration from bitrate, this may be inaccurate Input #0, wav, from 'fd1_file_pipe': Metadata: encoder : Lavf61.3.102 Duration: 00:01:00.00, bitrate: 3072 kb/s Stream #0:0: Audio: pcm_s32le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s32, 3072 kb/s
So, to summarize:
If two pipe:
outputs are used, one output does not receive any data, while the other gets corrupted. If, however, a pipe:
output is replaced with a regular file name (a named pipe in this case), the written data looks fine.
THANK YOU to everyone contributing to ffmpeg for your GREAT work!
Change History (3)
comment:1 by , 10 days ago
comment:3 by , 10 days ago
Resolution: | → invalid |
---|---|
Status: | new → closed |
Note:
See TracTickets
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<https://ffmpeg.org//ffmpeg-all.html#pipe>:
In
pipe:named_pipe
, thatnamed_pipe
does not look like a number.Also, when reporting a bug, simplify your use case as most as possible.