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Convert/Save not working when setting H264 codec options

Posted: 05 Mar 2023 19:32
by jameswyper
Hi. I'm trying to convert a set of MPEG2 videos to H264. I'm using the convert/save option and the only things I've tweaked are (a) check the Deinterlace box and (b) change the H264 + MP3 (MP4) profile so that the Video Codec Quality is set to 31 (I have tried, and reverted, some custom options too). When I click on Convert, nothing happens. Looking in Tools->Messages I see this for each video:

stream_out_transcode error: cannot create chain
main error: stream chain failed for `transcode{vcodec=h264,venc=x264{qp=31,scale=Auto,acodec=mpga,ab=128,channels=2,samplerate=44100,scodec=none,deinterlace}:std{access=file{no-overwrite},mux=mp4,dst='C:/Users/jrwyp/Videos/vhs/Upcott_2003-converted.mp4'}'
main error: cannot start stream output instance, aborting

To my eye it looks like there might be a closing brace missing - perhaps between Auto and acodec - so that the transcode command isn't being constructed properly.

Is this something I can fix (or should be fixing) with different options or is it a possible bug? I'm using 3.0.18

If I set the Quality field back to "not used" then conversion proceeds, but I'd really like to be able to control it, because the default options are barely shrinking my original files at all and 500MB for 14 minutes of 720x576 VHS capture seems a little too much..

Thanks

Re: Convert/Save not working when setting H264 codec options

Posted: 09 Mar 2023 19:26
by RĂ©mi Denis-Courmont
Yes the syntax is wrong. If this is coming from the VLC GUI, file a bug.