Problem cutting/encoding mpg

[kdemello]

I've got a problem video I recorded last night that is fighting me every step of the way. It's 720p60 HD captured from a Hauppauge Hvr-1600.

Typically, I begin by cutting out commercials using avidemux. This works 90% of the time. For this particular video, it gets about half way done and then segfaults:

Segfault
 at line 0, file ??/usr/lib64/libADM_core.so(ADM_backTrack+0x4e) [0x7fc21006419e]
/lib64/libc.so.6 [0x7fc20b2746e0]
avidemux2_gtk(_ZN11VideoStream12FillAUbufferEj+0x1d9) [0x514b59]
avidemux2_gtk(_ZN16ElementaryStream21BufferAndOutputSectorEv+0x93) [0x5170c3]
avidemux2_gtk(_ZN11Multiplexor9MultiplexEv+0x506) [0x512bf6]
avidemux2_gtk [0x50dbe6]
/lib64/libpthread.so.0 [0x7fc20f693070]
/lib64/libc.so.6(clone+0x6d) [0x7fc20b31511d]

Usually when this happens I clean the video by demuxing it with projectx.

Now the problem is projectx won't save the entire audio stream when I demux the video. It only saves the first 20 minutes (out of an hour).

I managed to get the commercials cut out using dvbcut (I really don't like using dvbcut because I always have to repack the output to get the correct length to be reported), but it cut out the last 5 minutes of audio.

I'm at my wits end. Avidemux, projectx and dvbcut have all failed me. Is there any other was I can clean this video?

As far as transcoding goes I don't have any problems there, just getting the commercials cut it driving me to pull my hair out.

[oldcpu]

Originally Posted by kdemello

I'm at my wits end. Avidemux, projectx and dvbcut have all failed me. Is there any other was I can clean this video?

I don't have a TV video card, so I can't help much with that.

Is there any chance you could change your approach? Maybe 1st convert the entire clip to a separate video format, and then use avidemux to cut out the commercials? Or perhaps chop the video app in two, and then use an app to cut out the commercials.

720p60 HD makes it a bit more challenging.

You could try using one of microchip's scripts (xvidenc, h264enc, divxenc) to convert the video, and then go in with avidemux and chop out commercials. Another frontend app for converting to a different format (besides microchip's scripts and avidemux) to try is handbrake.

[kdemello]

Originally Posted by oldcpu

I don't have a TV video card, so I can't help much with that.

Is there any chance you could change your approach? Maybe 1st convert the entire clip to a separate video format, and then use avidemux to cut out the commercials? Or perhaps chop the video app in two, and then use an app to cut out the commercials.

720p60 HD makes it a bit more challenging.

You could try using one of microchip's scripts (xvidenc, h264enc, divxenc) to convert the video, and then go in with avidemux and chop out commercials. Another frontend app for converting to a different format (besides microchip's scripts and avidemux) to try is handbrake.

Thanks for the reply. I hadn't considered transcoding it to a separate format before cutting. I'll give that a try.

Yeah, 720p60 is a pain. h264enc greatly reduced the learning curve, but I could never get it to use the decimate filter for ivtc. Instead I use the following, with good results:

#!/bin/bash

FILE=$1;
FILE_BASE=`echo $FILE | cut -d. -f1`

nice -n 10 mencoder ${FILE} -vf decimate=2:1000:1600:.001,scale=0:0,harddup -ofps 24000/1001 -passlogfile ${FILE_BASE}.log -channels 6 -oac copy -ovc x264 -x264encopts deblock:qcomp=.65:subq=5:8x8dct:frameref=2:bframes=3:b_pyramid:weight_b:threads=auto:pass=1:bitrate=3200 -o /dev/null 2>/dev/null

nice -n 10 mencoder ${FILE} -vf decimate=2:1000:1600:.001,scale=0:0,harddup -ofps 24000/1001 -passlogfile ${FILE_BASE}.log -channels 6 -oac copy -ovc x264 -x264encopts deblock:qcomp=.65:subq=5:8x8dct:frameref=2:bframes=3:b_pyramid:weight_b:threads=auto:pass=2:bitrate=3200  -o ${FILE_BASE}.avi 2>/dev/null