【发布时间】:2019-07-10 22:14:44
【问题描述】:
我正在编写一个 mp4 到 HLS 转码过程,该过程在小于 7 GB 的文件(样本大小为 100 个视频)上按预期工作。尝试对大于 7GB 的任何内容进行转码时,它会崩溃。
命令:
ffmpeg
-i large_file.mp4 -y
-vf scale=w=1920:h=1080:force_original_aspect_ratio=decrease
-c:a aac
-ar 48000
-c:v h264
-profile:v main
-crf 20
-sc_threshold 0
-g 48
-keyint_min 48
-hls_time 4
-hls_playlist_type vod
-b:v 5000k
-maxrate 5350k
-bufsize 7500k
-b:a 192k
-hls_segment_filename /1080p_%03d.ts
-threads 0
/tmp/output-ef42dc65-1d3d-4682-b32b-68d7c712fb9c-raw-test/1080p.m3u8
错误:
ffmpeg version 3.2.12-1\x7edeb9u1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
configuration: --prefix=/usr --extra-version='1~deb9u1' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
libavutil 55. 34.101 / 55. 34.101
libavcodec 57. 64.101 / 57. 64.101
libavformat 57. 56.101 / 57. 56.101
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x555888d821c0] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1280x720, 3856 kb/s): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'large_file.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.26.101
Duration: 05:56:12.51, start: 0.000000, bitrate: 4061 kb/s
Stream #0:0(und): Video: h264 (avc1 / 0x31637661), none, 1280x720, 3856 kb/s, 29.99 fps, 30 tbr, 100k tbn, 200k tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 194 kb/s (default)
Metadata:
handler_name : SoundHandler
[buffer @ 0x555888d88180] Unable to parse option value "-1" as pixel format
Last message repeated 1 times
[buffer @ 0x555888d88180] Error setting option pix_fmt to value -1.
[graph 0 input from stream 0:0 @ 0x555888d81e40] Error applying options to the filter.
Error opening filters!
错误说尝试增加analyzeduration 和probesize,我将其设置为最大值(基于this 帖子的回答),但这似乎并没有改变行为。我还怀疑该文件已损坏,但是对于所有大于 7GB 的文件,这都失败了,这使得建议它与 mp4 的大小无关。
【问题讨论】:
-
将 ffmpeg 升级到 4.1 或更新版本 (git) 并检查。
标签: ffmpeg mp4 http-live-streaming