[gentoo-user] Splitting .mov files
Hi All, I have a rather large .mov file which I want to split into two separate files. What options are available to me? -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Splitting .mov files
I assume you want each piece of this file to be play-able? If you don't care about that, just use split to chop them up into your desired size and then use cat to reassemble them at the destination. *$ split –bytes=1m /path/to/large/file /path/to/output/file/prefix* 'man split' will also contain this information. -Hal Mick wrote: Hi All, I have a rather large .mov file which I want to split into two separate files. What options are available to me? -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Splitting .mov files
On Saturday 26 April 2008, Hal Martin wrote: I assume you want each piece of this file to be play-able? If you don't care about that, just use split to chop them up into your desired size and then use cat to reassemble them at the destination. *$ split –bytes=1m /path/to/large/file /path/to/output/file/prefix* 'man split' will also contain this information. Thanks! I didn't know about split. I am afraid that the split files have to be playable. I intend to upload them on a server for a MSWindows user to download and play. It has to be point click skill level at the receiving end. -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] Splitting .mov files
On Sat, 2008-04-26 at 19:56 +0100, Mick wrote: On Saturday 26 April 2008, Hal Martin wrote: I assume you want each piece of this file to be play-able? If you don't care about that, just use split to chop them up into your desired size and then use cat to reassemble them at the destination. *$ split –bytes=1m /path/to/large/file /path/to/output/file/prefix* 'man split' will also contain this information. Thanks! I didn't know about split. I am afraid that the split files have to be playable. I intend to upload them on a server for a MSWindows user to download and play. It has to be point click skill level at the receiving end. Hmm, theoretically it should be possible without re-encoding because video files contain I-frames which are encoded without reference to previous frames every x frames. With a media player you can only seek through a video from I-frame to I-frame (I think ...). If that assumption is right, it should be a relatively easy task. Something like this might work: mencoder -vf harddup -ovc copy -oac copy -of lavf -lavfopts format=mov -ss 1:30 -endpos 3:00 -o output.mov input.mov explanation: -vf harddup - don't skip duplicate frames -ovc copy; -oac copy - don't re-encode audio and video -of lavf - use lavf for muxing -lavfopts format=mov - mux into mov-format -ss 1:30 - skip the first 1 min + 30 sec -endpos 3:00 - end input at position 3:00 min of the original film -o output.mov - write to output.mov This command should result in a file containing a total of 3:00-1:30=1:30 min of film, however, seeking might be inaccurate (searches next or previous I-frame) so both videos might overlap for maybe a second or two or you could loose that amount time therefor tweaking might be necessary. Unfortunately, I couldn't test this because I have no suitable video file at hand. If it works, tell me please, if not, post your results, maybe I can look further into it. signature.asc Description: This is a digitally signed message part
Re: [gentoo-user] Splitting .mov files
El Sat, 26 Apr 2008 22:06:52 +0200 Florian Philipp [EMAIL PROTECTED] escribió: mencoder -vf harddup -ovc copy -oac copy -of lavf -lavfopts format=mov -ss 1:30 -endpos 3:00 -o output.mov input.mov explanation: [...] -ss 1:30 - skip the first 1 min + 30 sec -endpos 3:00 - end input at position 3:00 min of the original film -o output.mov - write to output.mov This command should result in a file containing a total of 3:00-1:30=1:30 min of film [...] i think this is not entirely correct. according to the manual, When used in conjunction with −ss option, −endpos time will shift forward by seconds specified with −ss. that means that if you want 90 seconds of film, you must use -endpos 90 or -endpos 1:30, independently from the time given in -ss. see the example from the man page: EXAMPLE: −endpos 56 Stop at 56 seconds. −endpos 01:10:00 Stop at 1 hour 10 minutes. −ss 10 −endpos 56 Stop at 1 minute 6 seconds. ^^ best, lj -- gentoo-user@lists.gentoo.org mailing list
Re: [gentoo-user] Splitting .mov files
On Sat, 2008-04-26 at 18:43 -0300, luis jure wrote: El Sat, 26 Apr 2008 22:06:52 +0200 Florian Philipp [EMAIL PROTECTED] escribió: mencoder -vf harddup -ovc copy -oac copy -of lavf -lavfopts format=mov -ss 1:30 -endpos 3:00 -o output.mov input.mov explanation: [...] -ss 1:30 - skip the first 1 min + 30 sec -endpos 3:00 - end input at position 3:00 min of the original film -o output.mov - write to output.mov This command should result in a file containing a total of 3:00-1:30=1:30 min of film [...] i think this is not entirely correct. according to the manual, When used in conjunction with −ss option, −endpos time will shift forward by seconds specified with −ss. that means that if you want 90 seconds of film, you must use -endpos 90 or -endpos 1:30, independently from the time given in -ss. see the example from the man page: EXAMPLE: −endpos 56 Stop at 56 seconds. −endpos 01:10:00 Stop at 1 hour 10 minutes. −ss 10 −endpos 56 Stop at 1 minute 6 seconds. ^^ best, lj Thanks for the hint. Unfortunately, my method doesn't work anyway (I've found a file on which I could test it).The video gets some really ugly artifacts and seems to be damaged. Of course, your millage might vary if you use another encoding than me. signature.asc Description: This is a digitally signed message part
