Divx Converter Problems

[Maritimer]

I am trying to convert a HD 720p video to a divx format, for a buddy of mine of a trip he took. He wants to play it on his Samsung 1080p DVD player without losing any quality. I tried using Divx Converter with the HD 720p mode, but when we try to play it. We get an error saying that the file is not supported.

Can someone please help us in solving this issue. Below is some information on the video information

Format: H.264/MPEG-4 AVC
Bitrate: 2043 kbps
Framerate: 23.976
Encoder: x264
Resolution: 720x400
Aspect Ratio: 1.800

[V1de0Luvr]

ffmpeg -i input.mp4 -vcodec mpeg4 -vtag divx -sameq -acodec libmp3lame -ab 192kb -ar 44100 -ac 2 output.avi

If that doesn't work, try adding -me_range 1023.

To download FFmpeg binaries go to http://ffmpeg.arrozcru.org/wiki/index.php?title=Links and take your pick.

[Maritimer]

I am getting this error

Resampling with input channels greater than 2 unsupported.
Can not resample 6 channels @ 48000 Hz to 2 channels @ 44100 Hz

[V1de0Luvr]

In that case try AC3 to preserve all 6 channels:

ffmpeg -i input.mp4 -vcodec mpeg4 -vtag divx -sameq -acodec ac3 -ab 384kb -ar 48000 -ac 6 output.avi

I assume your audio is AAC since the video is AVC. If it is already AC3 you could use -acodec copy to leave it intact.

[Maritimer]

that worked but, the file size went from 1.4 gig to over 5gig in size. Too large for a normal size DVD. Anyway to make it 4gig and keep quality?

[V1de0Luvr]

Unfortunately, the -sameq option seems to use more bitrate than necessary. Try this:

ffmpeg -i input.mp4 -vcodec mpeg4 -vtag divx -qscale 2.7 -flags +aic+mv4 -trellis 1 -mbd 2 -cmp 2 -subcmp 2 -g 250 -me_range 1023 -acodec ac3 -ab 384kb -ar 48000 -ac 6 output.avi

[Baldrick]

Or just use a ffmpeg/xvid frontend like handbrake or xvid4psp, choose avi xvid, constant quality encoding mode or 2-pass and set the file output size directly.

[V1de0Luvr]

Yep, when targeting a specific size (DVD) then a 2-pass encode is necessary. Unfortunately, XviD4PSP can't sync audio to video about 9 times out of 10 for me. Haven't tried the latest unofficial build tho, nor Handbrake.

[guns1inger]

I was getting audio sync problems with 5.0.37 under windows 7. Reverted to 5.0.36 and all is well.

[Maritimer]

After all that converting I still get "The file is not supported"

[handband2]

After all that converting I still get "The file is not supported"

When ffmpeg keeps failing to convert a file I use the following with mencoder:

mencoder INPUT-FILE -ovc xvid -oac mp3lame -xvidencopts fixed_quant=4 -o OUTPUT.mp4

[porfitron]

It's very likely the audio... have you installed AC3filter on your system? Then you have the option to transcode the audio to AAC.