Sau khi chạy lệnh này ffmpeg -f concat -i mylist.txt -c copy output.mp4
- Tôi nhận được output.mp4
tệp bị hỏng và thông báo này:
ffmpeg -f concat -i mylist.txt -c copy output.mp4
ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, concat, from 'mylist.txt':
Duration: N/A, start: 0.000000, bitrate: 829 kb/s
Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1440x900, 701 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc
Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s
Output #0, mp4, to 'output.mp4':
Metadata:
encoder : Lavf56.25.101
Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1440x900, q=2-31, 701 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc
Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, 128 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x7f897a01bc00] Non-monotonous DTS in output stream 0:0; previous: 598061, current: 467644; changing to 598062. This may result in incorrect timestamps in the output file.
[mp4 @ 0x7f897a01bc00] Non-monotonous DTS in output stream 0:0; previous: 598062, current: 468044; changing to 598063. This may result in incorrect timestamps in the output file.
[mp4 @ 0x7f897a01bc00] Non-monotonous DTS in output stream 0:0; previous: 598063, current: 468444; changing to 598064. This may result in incorrect timestamps in the output file.
...
[mp4 @ 0x7f897a01bc00] Non-monotonous DTS in output stream 0:0; previous: 598362, current: 588044; changing to 598363. This may result in incorrect timestamps in the output file.
frame= 1472 fps=0.0 q=-1.0 Lsize= 5825kB time=00:00:49.04 bitrate= 973.0kbits/s
video:4903kB audio:877kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.776358%
Nội dung của mylist.txt
file 'cut.mp4'
file 'cut2.mp4'
đầu ra cut.mp4 từ ffmpeg:
ffmpeg -i cut.mp4
ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cut.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.25.101
Duration: 00:00:39.04, start: 0.036281, bitrate: 837 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1440x900, 701 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
đầu ra cut2.mp4 từ ffmpeg:
ffmpeg -i cut2.mp4
ffmpeg version 2.6.2 Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'cut2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.25.101
Duration: 00:00:10.07, start: 0.000000, bitrate: 1498 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1440x900, 1271 kb/s, 30 fps, 30 tbr, 12k tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 218 kb/s (default)
Metadata:
handler_name : SoundHandler
cut.mp4
Tôi đã nhận lệnh này ffmpeg -ss 00:00:11 -i myfile.mp4 -to 00:00:39 -vf 'drawbox= : x=0 : y=0 : color=invert' cut.mp4
cut2.mp4
Tôi đã nhận lệnh này ffmpeg -ss 00:00:00 -i myfile.mp4 -to 00:00:10 -c copy cut2.mp4
Tôi đã tìm kiếm rất nhiều - không tìm thấy bất kỳ giải pháp nào, có lẽ, ai đó có thể giúp tôi với giải pháp này.
output.mp4
có thể chơi được, nhưng trông lạ.
-c copy
để cho phép mã hóa lại hoặc -c:a copy
chỉ sử dụng . Sau đó, bước concat vẫn có thể sử dụng -c copy
vì tất cả các video đã được mã hóa lại. Lưu ý rằng một số video có cảnh báo này vẫn có vẻ ổn sau khi concat và như vậy -c copy
là ổn.