Avidemux Forum

Avidemux => Windows => Topic started by: kkk on August 24, 2018, 02:18:46 PM

Title: about video merge & cut
Post by: kkk on August 24, 2018, 02:18:46 PM
I know little English,can i ask question in Chinese?

有看到一个说是能解决这种问题的,大概意思是,剪切之后,在第一个I帧之前的内容重新编码,而I帧之后所有的内容都是copy原视频的内容,类似于这个软件以前有提到的smart copy方案,可惜这个软件说是只支持一种格式而已。
这种方式就是可以让导出时既省时间,又能很好的保存原视频的清晰度。这软件能让普通的视频,比如flv avi mkv之类的进行这样的剪切吗

Title: Re: about video merge & cut
Post by: eumagga0x2a on August 24, 2018, 03:16:34 PM
I have to rely on Google Translate, so I apologize in advance for possible misunderstandings.

1. The number of soundtracks, their audio codec parameters and the channel layout off all appended source videos must strictly match. You could extract the soundtrack of the second video, prepend silence for the duration of the first video using a wave editor (e.g. Audacity), export the audio as 16 bit low-endian PCM (.wav) or MP3 and add it as an external soundtrack in Avidemux.

2. The feature of legacy Avidemux versions to re-encode only portions of video was incompatible with modern video codecs like H.264 and HEVC and therefore removed a long time ago. If you need to cut at other positions as at I-frames (more precisely, at IDR frames = instant decoder refresh frames), you must re-encode the entire video.
Title: Re: about video merge & cut
Post by: kkk on August 25, 2018, 04:33:06 AM
ok,I see,thank you
maybe the second question is too hard  to solve at present
I ask many people for the ‘smart copy’ in my country,no one have any solution
anyhow,thanks for your answer