MKV is open source, and not an industry standard, so it doesn't have support on many devices. It won't even work in Windows Media Player or Quicktime, the defaults for Windows and macOS. The solution: Convert your MKV files to MP4. MP4 is compatible with most devices and apps, and you won't lose much quality (if any) to the conversion process. I simply want to convert files, any format to any format (at the moment, I need to convert MKV to MP4-h264), without losing quality. I don't want to resize (scale) the video, I don't want to change its aspect ratio and I don't want it to lose quality (this is very important); all I want is "to change the format", that's all. It depends upon the file. In theory MP4 and MKV are both just containers, so you can easily convert from one to the other without any loss of quality - it's one command line in ffmpeg. In practice there are certain codecs which only work with mkv, so if you have one of those then you'll run into problems. Subtitles, for one - mp4 can't embed Finally click on Add to queue and then Encode in the top toolbar. 10 seconds later you have a working MP4 or MKV file in the destination folder shown at the bottom of the Xmedia screen. If you have multiple subtitles in SRT format, you can probably add more SRT files to the folder and name them something like: Chappie.[EN].srt Chappie.[DE].srt One of the easiest and fastest ways to convert MKV files to MP4 without losing quality is with an online video converter service, such as Handbrake or YouTube’s Video Convert. These services are free to use and offer various file formats – although one drawback might be having to upload your videos directly onto their servers; this may Although it is a free tool, Free HD Video Converter Factory has a good performance. It helps you to quickly convert MKV files to MP4 and reduce video size without losing quality with only three steps. You can also convert MP4 to MKV as it allows conversions among all popular video and audio formats without limits. This converter is simple to use. The tag "HVC1" indicates the HEVC (H.265) video codec. If your .mkv file had a HEVC-encoded video stream, it doesn't matter how or where you copy it or "pass through" – a copy of HEVC video is still going to be HEVC video. That's literally what "passthrough" means. Your PS3 can't play HEVC/H.265 video in general. So the "HVC1" tag isn't the To use it, click the icon with an arrow pointing to the right near the top of the window to load the file. Then set the parameter Video handling to "passthrough". You can try the same with the audio handling, but perhaps it's best to try setting it to "Custom" first. Then click the Audio tab that appears and check "Audio encoding options" > aac. Hold down the shift key and right click the empty space. Then click Open command window here. Then the FFmpeg command window will open and now we can start to use FFmpeg to convert H.264 to H.265. Step 3: Now you can input the correct command line behind the cursor. 1 Answer. Sorted by: 1. First try. ffmpeg -i input.mp4 -c copy output.xxx. This will keep the video & audio streams as is. As long as the output format supports the input codecs, you are good to go. For incompatible containers, you need to reencode and an option argument to set encoding quality depends on which codec. nnTiYo.