I have a MKV video I want to convert to MP4, but every which way I try and convert it (Handbrake, WinFF, FFmpeg, MEncoder,...) I lose the video's subtitles. How can I convert the video, keeping the subtitles, or add a subtitles .srt?

I also would like 2-pass encoding with a video bitrate 4054 and audio bitrate 160.

Thanks.

I was asked for the ffmpeg -i:

joe@joe-Leopard-Extreme:/media/Elements/Home Folder/Videos$ ffmpeg -i iron.mkv

ffmpeg version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav     developers

built on Jun 12 2012 16:52:09 with gcc 4.6.3

*** THIS PROGRAM IS DEPRECATED ***

This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.

[matroska,webm @ 0x1a319a0] Estimating duration from bitrate, this may be inaccurate

Input #0, matroska,webm, from 'iron.mkv':

Metadata:

title           : Iron 

Duration: 02:06:01.67, start: 0.000000, bitrate: 1280 kb/s

Chapter #0.0: start 0.000000, end 546.170622

Metadata:

  title           : Chapter 00

Chapter #0.1: start 546.170622, end 1080.579489

Metadata:

  title           : Chapter 01

Chapter #0.2: start 1080.579489, end 1609.941667

Metadata:

  title           : Chapter 02

Chapter #0.3: start 1609.941667, end 2101.849733

Metadata:

  title           : Chapter 03

Chapter #0.4: start 2101.849733, end 2595.259333

Metadata:

  title           : Chapter 04

Chapter #0.5: start 2595.259333, end 3158.488667

Metadata:

  title           : Chapter 05

Chapter #0.6: start 3158.488667, end 3564.644400

Metadata:

  title           : Chapter 06

Chapter #0.7: start 3564.644400, end 4052.423356

Metadata:

  title           : Chapter 07

Chapter #0.8: start 4052.423356, end 4304.300000

Metadata:

  title           : Chapter 08

Chapter #0.9: start 4304.300000, end 4711.206489

Metadata:

  title           : Chapter 09

Chapter #0.10: start 4711.206489, end 5080.575489

Metadata:

  title           : Chapter 10

Chapter #0.11: start 5080.575489, end 5700.111067

Metadata:

  title           : Chapter 11

Chapter #0.12: start 5700.111067, end 6269.346400

Metadata:

  title           : Chapter 12

Chapter #0.13: start 6269.346400, end 6811.471333

Metadata:

  title           : Chapter 13

Chapter #0.14: start 6811.471333, end 7561.679000

Metadata:

  title           : Chapter 14

Stream #0.0(eng): Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc

Stream #0.1(eng): Audio: ac3, 48000 Hz, 5.1, s16, 640 kb/s (default)

Metadata:

  title           : 3/2+1

Stream #0.2(ita): Audio: ac3, 48000 Hz, 5.1, s16, 640 kb/s

Metadata:

  title           : 3/2+1

Stream #0.3(eng): Subtitle: pgssub (default)

Stream #0.4(eng): Subtitle: pgssub

Stream #0.5(eng): Subtitle: pgssub

Stream #0.6(eng): Subtitle: pgssub

At least one output file must be specified

joe@joe-Leopard-Extreme:/media/Elements/Home Folder/Videos