Convert .mov file to .mp4 (without losing quality) for playback on a 42" TV

[cjborntorun]

My client is attending a tradeshow for which I will provide and setup the equipment. They provide their marketing video. Given the current equipment we have, we find that the best arrangement is for our clients to create their marketing video in .MP4 format. The success and ease of playback on our Samsung TVs through the USB port is 100% successful using .MP4's. Unfortunately, the client provided their video in .MOV format. They posted their file to DropBox for me and left town and can't correct it on their end at this point. I tried to convert the file myself using a software converter called EaseFab Video Converter. The process worked fine, however, the file size went from 2.9GB down to 94MB. I can't afford quality degradation, since the playback needs to be sharp on a 42" TV. Suggestions please on how to remedy this or suggest a different method to convert the file?? Thank you

[raffriff42]

Try this ffmpeg command line:

ffmpeg -i "your-video.mov" -c:v copy -c:a copy "your-video.mp4"

It just may work. If not, please give us the resulting error message.

If you are allergic to the command prompt, get Xmedia Recode (here's a short guide) and select "copy" mode.
Again, it might work. If not, please post the error message.

(If your MOV's video or audio streams are incompatible with MP4, you'll get an error. We'll advise on the best way forward if that happens)

[sneaker]

Do you have the TV to test? I've seen .mov files start working on Samsung TVs simply by renaming the file extension to .mp4 without any actual conversion (given that the mov is H.264+AAC).

[video.baba]

It would have been a great help if you'd told us the video and audio details within the MOV file.