2012-07-13 108 views
2

我想在Ubuntu 12.04上使用ffmpeg在視頻底部放一段簡單的文字。我想這其中建議在幾個地方:如何使用ffmpeg將文本添加到avi視頻?

ffmpeg -i input.avi -vf drawtext="fontfile=/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif.ttf:text='Text to write':fontsize=20:fontcolor=black:x=100:y=100" output.avi 

但每次我得到這個錯誤:

ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers 
    built on Jun 12 2012 16:37:58 with gcc 4.6.3 
*** THIS PROGRAM IS DEPRECATED *** 
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. 
Input #0, avi, from 'input.avi': 
    Duration: 04:09:09.66, start: 0.000000, bitrate: 480 kb/s 
    Stream #0.0: Video: mpeg4 (Advanced Simple Profile), yuv420p, 320x240 [PAR 1:1 DAR 4:3], 45 tbr, 45 tbn, 45 tbc 
    Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 64 kb/s 
[buffer @ 0x860d5a0] w:320 h:240 pixfmt:yuv420p 
Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt' 
[ac3 @ 0x8607a00] invalid bit rate 
Output #0, avi, to 'output.avi': 
    Stream #0.0: Video: mpeg4, yuv420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 45 tbc 
    Stream #0.1: Audio: ac3, 48000 Hz, stereo, flt, 200 kb/s 
Stream mapping: 
    Stream #0.0 -> #0.0 
    Stream #0.1 -> #0.1 
Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height 

感謝你的幫助。

+0

嘗試添加'-acodec copy'。 – 2012-07-13 10:15:35

+0

@Banthar它解決了這個問題。謝謝。然而,文本出現在中間的任何想法如何把它放在底部?謝謝 – qliq 2012-07-13 13:47:21

回答

6

該文檔顯示您可以使用其他參數xy,如輸入視頻高度和寬度以及文本寬度和高度。將文本放在底部的一種方法是y=main_h-text_h。如果你想在底部填充一點點,你可以使用y=main_h-(text_h*2)水平居中使用x=(main_w/2-text_w/2)

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